Merge branch 'akpm' (second patchbomb from Andrew Morton)

Merge more incoming from Andrew Morton: "Two new syscalls: memfd_create in "shm: add memfd_create() syscall" kexec_file_load in "kexec: implementation of new syscall kexec_file_load" And: - Most (all?) of the rest of MM - Lots of the usual misc bits - fs/autofs4 - drivers/rtc - fs/nilfs - procfs - fork.c, exec.c - more in lib/ - rapidio - Janitorial work in filesystems: fs/ufs, fs/reiserfs, fs/adfs, fs/cramfs, fs/romfs, fs/qnx6. - initrd/initramfs work - "file sealing" and the memfd_create() syscall, in tmpfs - add pci_zalloc_consistent, use it in lots of places - MAINTAINERS maintenance - kexec feature work" * emailed patches from Andrew Morton <akpm@linux-foundation.org: (193 commits) MAINTAINERS: update nomadik patterns MAINTAINERS: update usb/gadget patterns MAINTAINERS: update DMA BUFFER SHARING patterns kexec: verify the signature of signed PE bzImage kexec: support kexec/kdump on EFI systems kexec: support for kexec on panic using new system call kexec-bzImage64: support for loading bzImage using 64bit entry kexec: load and relocate purgatory at kernel load time purgatory: core purgatory functionality purgatory/sha256: provide implementation of sha256 in purgaotory context kexec: implementation of new syscall kexec_file_load kexec: new syscall kexec_file_load() declaration kexec: make kexec_segment user buffer pointer a union resource: provide new functions to walk through resources kexec: use common function for kimage_normal_alloc() and kimage_crash_alloc() kexec: move segment verification code in a separate function kexec: rename unusebale_pages to unusable_pages kernel: build bin2c based on config option CONFIG_BUILD_BIN2C bin2c: move bin2c in scripts/basic shm: wait for pins to be released when sealing ...
author: Linus Torvalds <torvalds@linux-foundation.org> 2014-08-08 15:57:47 -0700
committer: Linus Torvalds <torvalds@linux-foundation.org> 2014-08-08 15:57:47 -0700
commit: 8065be8d032f38da25b54bf077a05a30d9ce9f2a (patch)
tree: 32a7baf4b40e0240ab4b9dd6f2bbe6129929bb66
parent: 27d438c56009e5ae632de36fe70985d1aab5e344 (diff)
parent: ecc265fe9e09e32a3573b2ba26e79b2099eb8bbb (diff)
348 files changed, 10189 insertions, 3536 deletions
diff --git a/CREDITS b/CREDITS
index a80b66718f66..bb6278884f89 100644
--- a/CREDITS
+++ b/CREDITS
@@ -1381,6 +1381,9 @@ S: 17 rue Danton
 S: F - 94270 Le Kremlin-Bicêtre
 S: France
 
+N: Jack Hammer
+D: IBM ServeRAID RAID (ips) driver maintenance
+
 N: Greg Hankins
 E: gregh@cc.gatech.edu
 D: fixed keyboard driver to separate LED and locking status
@@ -1691,6 +1694,10 @@ S: Reading
 S: RG6 2NU
 S: United Kingdom
 
+N: Dave Jeffery
+E: dhjeffery@gmail.com
+D: SCSI hacks and IBM ServeRAID RAID driver maintenance
+
 N: Jakub Jelinek
 E: jakub@redhat.com
 W: http://sunsite.mff.cuni.cz/~jj
diff --git a/Documentation/ABI/testing/sysfs-fs-nilfs2 b/Documentation/ABI/testing/sysfs-fs-nilfs2
new file mode 100644
index 000000000000..304ba84a973a
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-fs-nilfs2
@@ -0,0 +1,269 @@
+
+What:		/sys/fs/nilfs2/features/revision
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show current revision of NILFS file system driver.
+		This value informs about file system revision that
+		driver is ready to support.
+
+What:		/sys/fs/nilfs2/features/README
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Describe attributes of /sys/fs/nilfs2/features group.
+
+What:		/sys/fs/nilfs2/<device>/revision
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show NILFS file system revision on volume.
+		This value informs about metadata structures'
+		revision on mounted volume.
+
+What:		/sys/fs/nilfs2/<device>/blocksize
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show volume's block size in bytes.
+
+What:		/sys/fs/nilfs2/<device>/device_size
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show volume size in bytes.
+
+What:		/sys/fs/nilfs2/<device>/free_blocks
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show count of free blocks on volume.
+
+What:		/sys/fs/nilfs2/<device>/uuid
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show volume's UUID (Universally Unique Identifier).
+
+What:		/sys/fs/nilfs2/<device>/volume_name
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show volume's label.
+
+What:		/sys/fs/nilfs2/<device>/README
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Describe attributes of /sys/fs/nilfs2/<device> group.
+
+What:		/sys/fs/nilfs2/<device>/superblock/sb_write_time
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show last write time of super block in human-readable
+		format.
+
+What:		/sys/fs/nilfs2/<device>/superblock/sb_write_time_secs
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show last write time of super block in seconds.
+
+What:		/sys/fs/nilfs2/<device>/superblock/sb_write_count
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show current write count of super block.
+
+What:		/sys/fs/nilfs2/<device>/superblock/sb_update_frequency
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show/Set interval of periodical update of superblock
+		(in seconds).
+
+What:		/sys/fs/nilfs2/<device>/superblock/README
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Describe attributes of /sys/fs/nilfs2/<device>/superblock
+		group.
+
+What:		/sys/fs/nilfs2/<device>/segctor/last_pseg_block
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show start block number of the latest segment.
+
+What:		/sys/fs/nilfs2/<device>/segctor/last_seg_sequence
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show sequence value of the latest segment.
+
+What:		/sys/fs/nilfs2/<device>/segctor/last_seg_checkpoint
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show checkpoint number of the latest segment.
+
+What:		/sys/fs/nilfs2/<device>/segctor/current_seg_sequence
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show segment sequence counter.
+
+What:		/sys/fs/nilfs2/<device>/segctor/current_last_full_seg
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show index number of the latest full segment.
+
+What:		/sys/fs/nilfs2/<device>/segctor/next_full_seg
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show index number of the full segment index
+		to be used next.
+
+What:		/sys/fs/nilfs2/<device>/segctor/next_pseg_offset
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show offset of next partial segment in the current
+		full segment.
+
+What:		/sys/fs/nilfs2/<device>/segctor/next_checkpoint
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show next checkpoint number.
+
+What:		/sys/fs/nilfs2/<device>/segctor/last_seg_write_time
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show write time of the last segment in
+		human-readable format.
+
+What:		/sys/fs/nilfs2/<device>/segctor/last_seg_write_time_secs
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show write time of the last segment in seconds.
+
+What:		/sys/fs/nilfs2/<device>/segctor/last_nongc_write_time
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show write time of the last segment not for cleaner
+		operation in human-readable format.
+
+What:		/sys/fs/nilfs2/<device>/segctor/last_nongc_write_time_secs
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show write time of the last segment not for cleaner
+		operation in seconds.
+
+What:		/sys/fs/nilfs2/<device>/segctor/dirty_data_blocks_count
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show number of dirty data blocks.
+
+What:		/sys/fs/nilfs2/<device>/segctor/README
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Describe attributes of /sys/fs/nilfs2/<device>/segctor
+		group.
+
+What:		/sys/fs/nilfs2/<device>/segments/segments_number
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show number of segments on a volume.
+
+What:		/sys/fs/nilfs2/<device>/segments/blocks_per_segment
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show number of blocks in segment.
+
+What:		/sys/fs/nilfs2/<device>/segments/clean_segments
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show count of clean segments.
+
+What:		/sys/fs/nilfs2/<device>/segments/dirty_segments
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show count of dirty segments.
+
+What:		/sys/fs/nilfs2/<device>/segments/README
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Describe attributes of /sys/fs/nilfs2/<device>/segments
+		group.
+
+What:		/sys/fs/nilfs2/<device>/checkpoints/checkpoints_number
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show number of checkpoints on volume.
+
+What:		/sys/fs/nilfs2/<device>/checkpoints/snapshots_number
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show number of snapshots on volume.
+
+What:		/sys/fs/nilfs2/<device>/checkpoints/last_seg_checkpoint
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show checkpoint number of the latest segment.
+
+What:		/sys/fs/nilfs2/<device>/checkpoints/next_checkpoint
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show next checkpoint number.
+
+What:		/sys/fs/nilfs2/<device>/checkpoints/README
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Describe attributes of /sys/fs/nilfs2/<device>/checkpoints
+		group.
+
+What:		/sys/fs/nilfs2/<device>/mounted_snapshots/README
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Describe content of /sys/fs/nilfs2/<device>/mounted_snapshots
+		group.
+
+What:		/sys/fs/nilfs2/<device>/mounted_snapshots/<id>/inodes_count
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show number of inodes for snapshot.
+
+What:		/sys/fs/nilfs2/<device>/mounted_snapshots/<id>/blocks_count
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Show number of blocks for snapshot.
+
+What:		/sys/fs/nilfs2/<device>/mounted_snapshots/<id>/README
+Date:		April 2014
+Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+		Describe attributes of /sys/fs/nilfs2/<device>/mounted_snapshots/<id>
+		group.
diff --git a/Documentation/cgroups/memcg_test.txt b/Documentation/cgroups/memcg_test.txt
index 80ac454704b8..8870b0212150 100644
--- a/Documentation/cgroups/memcg_test.txt
+++ b/Documentation/cgroups/memcg_test.txt
@@ -24,64 +24,27 @@ Please note that implementation details can be changed.
 
    a page/swp_entry may be charged (usage += PAGE_SIZE) at
 
-	mem_cgroup_charge_anon()
-	  Called at new page fault and Copy-On-Write.
-
-	mem_cgroup_try_charge_swapin()
-	  Called at do_swap_page() (page fault on swap entry) and swapoff.
-	  Followed by charge-commit-cancel protocol. (With swap accounting)
-	  At commit, a charge recorded in swap_cgroup is removed.
-
-	mem_cgroup_charge_file()
-	  Called at add_to_page_cache()
-
-	mem_cgroup_cache_charge_swapin()
-	  Called at shmem's swapin.
-
-	mem_cgroup_prepare_migration()
-	  Called before migration. "extra" charge is done and followed by
-	  charge-commit-cancel protocol.
-	  At commit, charge against oldpage or newpage will be committed.
+	mem_cgroup_try_charge()
 
 2. Uncharge
   a page/swp_entry may be uncharged (usage -= PAGE_SIZE) by
 
-	mem_cgroup_uncharge_page()
-	  Called when an anonymous page is fully unmapped. I.e., mapcount goes
-	  to 0. If the page is SwapCache, uncharge is delayed until
-	  mem_cgroup_uncharge_swapcache().
-
-	mem_cgroup_uncharge_cache_page()
-	  Called when a page-cache is deleted from radix-tree. If the page is
-	  SwapCache, uncharge is delayed until mem_cgroup_uncharge_swapcache().
-
-	mem_cgroup_uncharge_swapcache()
-	  Called when SwapCache is removed from radix-tree. The charge itself
-	  is moved to swap_cgroup. (If mem+swap controller is disabled, no
-	  charge to swap occurs.)
+	mem_cgroup_uncharge()
+	  Called when a page's refcount goes down to 0.
 
 	mem_cgroup_uncharge_swap()
 	  Called when swp_entry's refcnt goes down to 0. A charge against swap
 	  disappears.
 
-	mem_cgroup_end_migration(old, new)
-	At success of migration old is uncharged (if necessary), a charge
-	to new page is committed. At failure, charge to old page is committed.
-
 3. charge-commit-cancel
-	In some case, we can't know this "charge" is valid or not at charging
-	(because of races).
-	To handle such case, there are charge-commit-cancel functions.
-		mem_cgroup_try_charge_XXX
-		mem_cgroup_commit_charge_XXX
-		mem_cgroup_cancel_charge_XXX
-	these are used in swap-in and migration.
+	Memcg pages are charged in two steps:
+		mem_cgroup_try_charge()
+		mem_cgroup_commit_charge() or mem_cgroup_cancel_charge()
 
 	At try_charge(), there are no flags to say "this page is charged".
 	at this point, usage += PAGE_SIZE.
 
-	At commit(), the function checks the page should be charged or not
-	and set flags or avoid charging.(usage -= PAGE_SIZE)
+	At commit(), the page is associated with the memcg.
 
 	At cancel(), simply usage -= PAGE_SIZE.
 
@@ -91,18 +54,6 @@ Under below explanation, we assume CONFIG_MEM_RES_CTRL_SWAP=y.
 	Anonymous page is newly allocated at
 		  - page fault into MAP_ANONYMOUS mapping.
 		  - Copy-On-Write.
- 	It is charged right after it's allocated before doing any page table
-	related operations. Of course, it's uncharged when another page is used
-	for the fault address.
-
-	At freeing anonymous page (by exit() or munmap()), zap_pte() is called
-	and pages for ptes are freed one by one.(see mm/memory.c). Uncharges
-	are done at page_remove_rmap() when page_mapcount() goes down to 0.
-
-	Another page freeing is by page-reclaim (vmscan.c) and anonymous
-	pages are swapped out. In this case, the page is marked as
-	PageSwapCache(). uncharge() routine doesn't uncharge the page marked
-	as SwapCache(). It's delayed until __delete_from_swap_cache().
 
 	4.1 Swap-in.
 	At swap-in, the page is taken from swap-cache. There are 2 cases.
@@ -111,41 +62,6 @@ Under below explanation, we assume CONFIG_MEM_RES_CTRL_SWAP=y.
 	(b) If the SwapCache has been mapped by processes, it has been
 	    charged already.
 
-	This swap-in is one of the most complicated work. In do_swap_page(),
-	following events occur when pte is unchanged.
-
-	(1) the page (SwapCache) is looked up.
-	(2) lock_page()
-	(3) try_charge_swapin()
-	(4) reuse_swap_page() (may call delete_swap_cache())
-	(5) commit_charge_swapin()
-	(6) swap_free().
-
-	Considering following situation for example.
-
-	(A) The page has not been charged before (2) and reuse_swap_page()
-	    doesn't call delete_from_swap_cache().
-	(B) The page has not been charged before (2) and reuse_swap_page()
-	    calls delete_from_swap_cache().
-	(C) The page has been charged before (2) and reuse_swap_page() doesn't
-	    call delete_from_swap_cache().
-	(D) The page has been charged before (2) and reuse_swap_page() calls
-	    delete_from_swap_cache().
-
-	    memory.usage/memsw.usage changes to this page/swp_entry will be
-	 Case          (A)      (B)       (C)     (D)
-         Event
-       Before (2)     0/ 1     0/ 1      1/ 1    1/ 1
-          ===========================================
-          (3)        +1/+1    +1/+1     +1/+1   +1/+1
-          (4)          -       0/ 0       -     -1/ 0
-          (5)         0/-1     0/ 0     -1/-1    0/ 0
-          (6)          -       0/-1       -      0/-1
-          ===========================================
-       Result         1/ 1     1/ 1      1/ 1    1/ 1
-
-       In any cases, charges to this page should be 1/ 1.
-
 	4.2 Swap-out.
 	At swap-out, typical state transition is below.
 
@@ -158,28 +74,20 @@ Under below explanation, we assume CONFIG_MEM_RES_CTRL_SWAP=y.
 	    swp_entry's refcnt -= 1.
 
 
-	At (b), the page is marked as SwapCache and not uncharged.
-	At (d), the page is removed from SwapCache and a charge in page_cgroup
-	is moved to swap_cgroup.
-
 	Finally, at task exit,
 	(e) zap_pte() is called and swp_entry's refcnt -=1 -> 0.
-	Here, a charge in swap_cgroup disappears.
 
 5. Page Cache
    	Page Cache is charged at
 	- add_to_page_cache_locked().
 
-	uncharged at
-	- __remove_from_page_cache().
-
 	The logic is very clear. (About migration, see below)
 	Note: __remove_from_page_cache() is called by remove_from_page_cache()
 	and __remove_mapping().
 
 6. Shmem(tmpfs) Page Cache
-	Memcg's charge/uncharge have special handlers of shmem. The best way
-	to understand shmem's page state transition is to read mm/shmem.c.
+	The best way to understand shmem's page state transition is to read
+	mm/shmem.c.
 	But brief explanation of the behavior of memcg around shmem will be
 	helpful to understand the logic.
 
@@ -192,56 +100,10 @@ Under below explanation, we assume CONFIG_MEM_RES_CTRL_SWAP=y.
 	It's charged when...
 	- A new page is added to shmem's radix-tree.
 	- A swp page is read. (move a charge from swap_cgroup to page_cgroup)
-	It's uncharged when
-	- A page is removed from radix-tree and not SwapCache.
-	- When SwapCache is removed, a charge is moved to swap_cgroup.
-	- When swp_entry's refcnt goes down to 0, a charge in swap_cgroup
-	  disappears.
 
 7. Page Migration
-   	One of the most complicated functions is page-migration-handler.
-	Memcg has 2 routines. Assume that we are migrating a page's contents
-	from OLDPAGE to NEWPAGE.
-
-	Usual migration logic is..
-	(a) remove the page from LRU.
-	(b) allocate NEWPAGE (migration target)
-	(c) lock by lock_page().
-	(d) unmap all mappings.
-	(e-1) If necessary, replace entry in radix-tree.
-	(e-2) move contents of a page.
-	(f) map all mappings again.
-	(g) pushback the page to LRU.
-	(-) OLDPAGE will be freed.
-
-	Before (g), memcg should complete all necessary charge/uncharge to
-	NEWPAGE/OLDPAGE.
-
-	The point is....
-	- If OLDPAGE is anonymous, all charges will be dropped at (d) because
-          try_to_unmap() drops all mapcount and the page will not be
-	  SwapCache.
-
-	- If OLDPAGE is SwapCache, charges will be kept at (g) because
-	  __delete_from_swap_cache() isn't called at (e-1)
-
-	- If OLDPAGE is page-cache, charges will be kept at (g) because
-	  remove_from_swap_cache() isn't called at (e-1)
-
-	memcg provides following hooks.
-
-	- mem_cgroup_prepare_migration(OLDPAGE)
-	  Called after (b) to account a charge (usage += PAGE_SIZE) against
-	  memcg which OLDPAGE belongs to.
-
-        - mem_cgroup_end_migration(OLDPAGE, NEWPAGE)
-	  Called after (f) before (g).
-	  If OLDPAGE is used, commit OLDPAGE again. If OLDPAGE is already
-	  charged, a charge by prepare_migration() is automatically canceled.
-	  If NEWPAGE is used, commit NEWPAGE and uncharge OLDPAGE.
-
-	  But zap_pte() (by exit or munmap) can be called while migration,
-	  we have to check if OLDPAGE/NEWPAGE is a valid page after commit().
+
+	mem_cgroup_migrate()
 
 8. LRU
         Each memcg has its own private LRU. Now, its handling is under global
diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
index 37803eb5521e..6af570ec53b4 100644
--- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt
+++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt
@@ -70,6 +70,7 @@ nuvoton,npct501		i2c trusted platform module (TPM)
 nxp,pca9556		Octal SMBus and I2C registered interface
 nxp,pca9557		8-bit I2C-bus and SMBus I/O port with reset
 nxp,pcf8563		Real-time clock/calendar
+nxp,pcf85063		Tiny Real-Time Clock
 ovti,ov5642		OV5642: Color CMOS QSXGA (5-megapixel) Image Sensor with OmniBSI and Embedded TrueFocus
 pericom,pt7c4338	Real-time Clock Module
 plx,pex8648		48-Lane, 12-Port PCI Express Gen 2 (5.0 GT/s) Switch
diff --git a/Documentation/oops-tracing.txt b/Documentation/oops-tracing.txt
index e3155995ddd8..beefb9f82902 100644
--- a/Documentation/oops-tracing.txt
+++ b/Documentation/oops-tracing.txt
@@ -268,6 +268,8 @@ characters, each representing a particular tainted value.
  14: 'E' if an unsigned module has been loaded in a kernel supporting
      module signature.
 
+ 15: 'L' if a soft lockup has previously occurred on the system.
+
 The primary reason for the 'Tainted: ' string is to tell kernel
 debuggers if this is a clean kernel or if anything unusual has
 occurred.  Tainting is permanent: even if an offending module is
diff --git a/Documentation/rapidio/tsi721.txt b/Documentation/rapidio/tsi721.txt
index 335f3c6087dc..626052f403bb 100644
--- a/Documentation/rapidio/tsi721.txt
+++ b/Documentation/rapidio/tsi721.txt
@@ -20,13 +20,26 @@ II. Known problems
 
   None.
 
-III. To do
+III. DMA Engine Support
 
- Add DMA data transfers (non-messaging).
- Add inbound region (SRIO-to-PCIe) mapping.
+Tsi721 mport driver supports DMA data transfers between local system memory and
+remote RapidIO devices. This functionality is implemented according to SLAVE
+mode API defined by common Linux kernel DMA Engine framework.
+
+Depending on system requirements RapidIO DMA operations can be included/excluded
+by setting CONFIG_RAPIDIO_DMA_ENGINE option. Tsi721 miniport driver uses seven
+out of eight available BDMA channels to support DMA data transfers.
+One BDMA channel is reserved for generation of maintenance read/write requests.
+
+If Tsi721 mport driver have been built with RAPIDIO_DMA_ENGINE support included,
+this driver will accept DMA-specific module parameter:
+  "dma_desc_per_channel" - defines number of hardware buffer descriptors used by
+                           each BDMA channel of Tsi721 (by default - 128).
 
 IV. Version History
 
+  1.1.0 - DMA operations re-worked to support data scatter/gather lists larger
+          than hardware buffer descriptors ring.
   1.0.0 - Initial driver release.
 
 V.  License
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index c14374e71775..f79eb9666379 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -826,6 +826,7 @@ can be ORed together:
 4096 - An out-of-tree module has been loaded.
 8192 - An unsigned module has been loaded in a kernel supporting module
        signature.
+16384 - A soft lockup has previously occurred on the system.
 
 ==============================================================
 
diff --git a/MAINTAINERS b/MAINTAINERS
index e065c3881626..30873e781dfa 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -597,7 +597,7 @@ AMD GEODE CS5536 USB DEVICE CONTROLLER DRIVER
 M:	Thomas Dahlmann <dahlmann.thomas@arcor.de>
 L:	linux-geode@lists.infradead.org (moderated for non-subscribers)
 S:	Supported
-F:	drivers/usb/gadget/amd5536udc.*
+F:	drivers/usb/gadget/udc/amd5536udc.*
 
 AMD GEODE PROCESSOR/CHIPSET SUPPORT
 P:	Andres Salomon <dilinger@queued.net>
@@ -621,7 +621,7 @@ AMD MICROCODE UPDATE SUPPORT
 M:	Andreas Herrmann <herrmann.der.user@googlemail.com>
 L:	amd64-microcode@amd64.org
 S:	Maintained
-F:	arch/x86/kernel/microcode_amd.c
+F:	arch/x86/kernel/cpu/microcode/amd*
 
 AMD XGBE DRIVER
 M:	Tom Lendacky <thomas.lendacky@amd.com>
@@ -911,7 +911,7 @@ L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/baohua/linux.git
 S:	Maintained
 F:	arch/arm/mach-prima2/
-F:	drivers/clk/clk-prima2.c
+F:	drivers/clk/sirf/
 F:	drivers/clocksource/timer-prima2.c
 F:	drivers/clocksource/timer-marco.c
 N:	[^a-z]sirf
@@ -1164,6 +1164,7 @@ M:	Linus Walleij <linus.walleij@linaro.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 F:	arch/arm/mach-nomadik/
+F:	drivers/pinctrl/nomadik/
 F:	drivers/i2c/busses/i2c-nomadik.c
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git
 
@@ -1185,8 +1186,7 @@ F:	drivers/mmc/host/msm_sdcc.h
 F:	drivers/tty/serial/msm_serial.h
 F:	drivers/tty/serial/msm_serial.c
 F:	drivers/*/pm8???-*
-F:	drivers/mfd/ssbi/
-F:	include/linux/mfd/pm8xxx/
+F:	drivers/mfd/ssbi.c
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm.git
 S:	Maintained
 
@@ -1443,7 +1443,8 @@ F:	drivers/mfd/abx500*
 F:	drivers/mfd/ab8500*
 F:	drivers/mfd/dbx500*
 F:	drivers/mfd/db8500*
-F:	drivers/pinctrl/pinctrl-nomadik*
+F:	drivers/pinctrl/nomadik/pinctrl-ab*
+F:	drivers/pinctrl/nomadik/pinctrl-nomadik*
 F:	drivers/rtc/rtc-ab8500.c
 F:	drivers/rtc/rtc-pl031.c
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson.git
@@ -1699,7 +1700,7 @@ ATMEL USBA UDC DRIVER
 M:	Nicolas Ferre <nicolas.ferre@atmel.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Supported
-F:	drivers/usb/gadget/atmel_usba_udc.*
+F:	drivers/usb/gadget/udc/atmel_usba_udc.*
 
 ATMEL WIRELESS DRIVER
 M:	Simon Kelley <simon@thekelleys.org.uk>
@@ -1991,7 +1992,7 @@ F:	arch/arm/boot/dts/bcm113*
 F:	arch/arm/boot/dts/bcm216*
 F:	arch/arm/boot/dts/bcm281*
 F:	arch/arm/configs/bcm_defconfig
-F:	drivers/mmc/host/sdhci_bcm_kona.c
+F:	drivers/mmc/host/sdhci-bcm-kona.c
 F:	drivers/clocksource/bcm_kona_timer.c
 
 BROADCOM BCM2835 ARM ARCHICTURE
@@ -2341,12 +2342,6 @@ L:	netdev@vger.kernel.org
 S:	Maintained
 F:	drivers/net/ethernet/cirrus/ep93xx_eth.c
 
-CIRRUS LOGIC EP93XX OHCI USB HOST DRIVER
-M:	Lennert Buytenhek <kernel@wantstofly.org>
-L:	linux-usb@vger.kernel.org
-S:	Maintained
-F:	drivers/usb/host/ohci-ep93xx.c
-
 CIRRUS LOGIC AUDIO CODEC DRIVERS
 M:	Brian Austin <brian.austin@cirrus.com>
 M:	Paul Handrigan <Paul.Handrigan@cirrus.com>
@@ -2431,7 +2426,7 @@ W:	http://linux-cifs.samba.org/
 Q:	http://patchwork.ozlabs.org/project/linux-cifs-client/list/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6.git
 S:	Supported
-F:	Documentation/filesystems/cifs.txt
+F:	Documentation/filesystems/cifs/
 F:	fs/cifs/
 
 COMPACTPCI HOTPLUG CORE
@@ -2966,7 +2961,9 @@ L:	linux-media@vger.kernel.org
 L:	dri-devel@lists.freedesktop.org
 L:	linaro-mm-sig@lists.linaro.org
 F:	drivers/dma-buf/
-F:	include/linux/dma-buf* include/linux/reservation.h include/linux/*fence.h
+F:	include/linux/dma-buf*
+F:	include/linux/reservation.h
+F:	include/linux/*fence.h
 F:	Documentation/dma-buf-sharing.txt
 T:	git git://git.linaro.org/people/sumitsemwal/linux-dma-buf.git
 
@@ -3061,7 +3058,6 @@ L:	dri-devel@lists.freedesktop.org
 T:	git git://people.freedesktop.org/~agd5f/linux
 S:	Supported
 F:	drivers/gpu/drm/radeon/
-F:	include/drm/radeon*
 F:	include/uapi/drm/radeon*
 
 DRM PANEL DRIVERS
@@ -3255,26 +3251,12 @@ T:	git git://linuxtv.org/anttip/media_tree.git
 S:	Maintained
 F:	drivers/media/tuners/e4000*
 
-EATA-DMA SCSI DRIVER
-M:	Michael Neuffer <mike@i-Connect.Net>
-L:	linux-eata@i-connect.net
-L:	linux-scsi@vger.kernel.org
-S:	Maintained
-F:	drivers/scsi/eata*
-
 EATA ISA/EISA/PCI SCSI DRIVER
 M:	Dario Ballabio <ballabio_dario@emc.com>
 L:	linux-scsi@vger.kernel.org
 S:	Maintained
 F:	drivers/scsi/eata.c
 
-EATA-PIO SCSI DRIVER
-M:	Michael Neuffer <mike@i-Connect.Net>
-L:	linux-eata@i-connect.net
-L:	linux-scsi@vger.kernel.org
-S:	Maintained
-F:	drivers/scsi/eata_pio.*
-
 EC100 MEDIA DRIVER
 M:	Antti Palosaari <crope@iki.fi>
 L:	linux-media@vger.kernel.org
@@ -3449,7 +3431,7 @@ M:	Matt Fleming <matt.fleming@intel.com>
 L:	linux-efi@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git
 S:	Maintained
-F:	Documentation/x86/efi-stub.txt
+F:	Documentation/efi-stub.txt
 F:	arch/ia64/kernel/efi.c
 F:	arch/x86/boot/compressed/eboot.[ch]
 F:	arch/x86/include/asm/efi.h
@@ -3836,7 +3818,7 @@ M:	Li Yang <leoli@freescale.com>
 L:	linux-usb@vger.kernel.org
 L:	linuxppc-dev@lists.ozlabs.org
 S:	Maintained
-F:	drivers/usb/gadget/fsl*
+F:	drivers/usb/gadget/udc/fsl*
 
 FREESCALE QUICC ENGINE UCC ETHERNET DRIVER
 M:	Li Yang <leoli@freescale.com>
@@ -4525,10 +4507,7 @@ S:	Supported
 F:	drivers/scsi/ibmvscsi/ibmvfc*
 
 IBM ServeRAID RAID DRIVER
-P:	Jack Hammer
-M:	Dave Jeffery <ipslinux@adaptec.com>
-W:	http://www.developer.ibm.com/welcome/netfinity/serveraid.html
-S:	Supported
+S:	Orphan
 F:	drivers/scsi/ips.*
 
 ICH LPC AND GPIO DRIVER
@@ -4725,8 +4704,8 @@ F:	drivers/platform/x86/intel_menlow.c
 INTEL IA32 MICROCODE UPDATE SUPPORT
 M:	Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
 S:	Maintained
-F:	arch/x86/kernel/microcode_core.c
-F:	arch/x86/kernel/microcode_intel.c
+F:	arch/x86/kernel/cpu/microcode/core*
+F:	arch/x86/kernel/cpu/microcode/intel*
 
 INTEL I/OAT DMA DRIVER
 M:	Dan Williams <dan.j.williams@intel.com>
@@ -5185,7 +5164,6 @@ L:	linux-nfs@vger.kernel.org
 W:	http://nfs.sourceforge.net/
 S:	Supported
 F:	fs/nfsd/
-F:	include/linux/nfsd/
 F:	include/uapi/linux/nfsd/
 F:	fs/lockd/
 F:	fs/nfs_common/
@@ -5906,7 +5884,6 @@ F:	drivers/clocksource/metag_generic.c
 F:	drivers/irqchip/irq-metag.c
 F:	drivers/irqchip/irq-metag-ext.c
 F:	drivers/tty/metag_da.c
-F:	fs/imgdafs/
 
 MICROBLAZE ARCHITECTURE
 M:	Michal Simek <monstr@monstr.eu>
@@ -6997,9 +6974,9 @@ M:	Jamie Iles <jamie@jamieiles.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 T:	git git://github.com/jamieiles/linux-2.6-ji.git
 S:	Supported
+F:	arch/arm/boot/dts/picoxcell*
 F:	arch/arm/mach-picoxcell/
-F:	drivers/*/picoxcell*
-F:	drivers/*/*/picoxcell*
+F:	drivers/crypto/picoxcell*
 
 PIN CONTROL SUBSYSTEM
 M:	Linus Walleij <linus.walleij@linaro.org>
@@ -7224,7 +7201,7 @@ F:	drivers/ptp/*
 F:	include/linux/ptp_cl*
 
 PTRACE SUPPORT
-M:	Roland McGrath <roland@redhat.com>
+M:	Roland McGrath <roland@hack.frob.com>
 M:	Oleg Nesterov <oleg@redhat.com>
 S:	Maintained
 F:	include/asm-generic/syscall.h
@@ -7274,7 +7251,7 @@ S:	Maintained
 F:	arch/arm/mach-pxa/
 F:	drivers/pcmcia/pxa2xx*
 F:	drivers/spi/spi-pxa2xx*
-F:	drivers/usb/gadget/pxa2*
+F:	drivers/usb/gadget/udc/pxa2*
 F:	include/sound/pxa2xx-lib.h
 F:	sound/arm/pxa*
 F:	sound/soc/pxa/
@@ -7283,7 +7260,7 @@ PXA3xx NAND FLASH DRIVER
 M:	Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
 L:	linux-mtd@lists.infradead.org
 S:	Maintained
-F:	drivers/mtd/nand/pxa3xx-nand.c
+F:	drivers/mtd/nand/pxa3xx_nand.c
 
 MMP SUPPORT
 M:	Eric Miao <eric.y.miao@gmail.com>
@@ -9628,8 +9605,8 @@ USB WEBCAM GADGET
 M:	Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 L:	linux-usb@vger.kernel.org
 S:	Maintained
-F:	drivers/usb/gadget/*uvc*.c
-F:	drivers/usb/gadget/webcam.c
+F:	drivers/usb/gadget/function/*uvc*.c
+F:	drivers/usb/gadget/legacy/webcam.c
 
 USB WIRELESS RNDIS DRIVER (rndis_wlan)
 M:	Jussi Kivilinna <jussi.kivilinna@iki.fi>
diff --git a/arch/alpha/include/asm/Kbuild b/arch/alpha/include/asm/Kbuild
index 96e54bed5088..e858aa0ad8af 100644
--- a/arch/alpha/include/asm/Kbuild
+++ b/arch/alpha/include/asm/Kbuild
@@ -6,4 +6,5 @@ generic-y += exec.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
diff --git a/arch/alpha/include/asm/scatterlist.h b/arch/alpha/include/asm/scatterlist.h
deleted file mode 100644
index 017d7471c3c4..000000000000
--- a/arch/alpha/include/asm/scatterlist.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef _ALPHA_SCATTERLIST_H
-#define _ALPHA_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* !(_ALPHA_SCATTERLIST_H) */
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 916cedbd7a67..c49a775937db 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -83,6 +83,7 @@ config ARM
 	  <http://www.arm.linux.org.uk/>.
 
 config ARM_HAS_SG_CHAIN
+	select ARCH_HAS_SG_CHAIN
 	bool
 
 config NEED_SG_DMA_LENGTH
@@ -1982,6 +1983,8 @@ config XIP_PHYS_ADDR
 config KEXEC
 	bool "Kexec system call (EXPERIMENTAL)"
 	depends on (!SMP || PM_SLEEP_SMP)
+	select CRYPTO
+	select CRYPTO_SHA256
 	help
 	  kexec is a system call that implements the ability to shutdown your
 	  current kernel, and to start another kernel.  It is like a reboot
diff --git a/arch/arm/include/asm/Kbuild b/arch/arm/include/asm/Kbuild
index f5a357601983..70cd84eb7fda 100644
--- a/arch/arm/include/asm/Kbuild
+++ b/arch/arm/include/asm/Kbuild
@@ -22,6 +22,7 @@ generic-y += poll.h
 generic-y += preempt.h
 generic-y += resource.h
 generic-y += rwsem.h
+generic-y += scatterlist.h
 generic-y += sections.h
 generic-y += segment.h
 generic-y += sembuf.h
diff --git a/arch/arm/include/asm/scatterlist.h b/arch/arm/include/asm/scatterlist.h
deleted file mode 100644
index cefdb8f898a1..000000000000
--- a/arch/arm/include/asm/scatterlist.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef _ASMARM_SCATTERLIST_H
-#define _ASMARM_SCATTERLIST_H
-
-#ifdef CONFIG_ARM_HAS_SG_CHAIN
-#define ARCH_HAS_SG_CHAIN
-#endif
-
-#include <asm/memory.h>
-#include <asm/types.h>
-#include <asm-generic/scatterlist.h>
-
-#endif /* _ASMARM_SCATTERLIST_H */
diff --git a/arch/arm/mach-omap2/board-omap3touchbook.c b/arch/arm/mach-omap2/board-omap3touchbook.c
index 7da48bc42bbf..70b904c010c6 100644
--- a/arch/arm/mach-omap2/board-omap3touchbook.c
+++ b/arch/arm/mach-omap2/board-omap3touchbook.c
@@ -336,7 +336,7 @@ static int __init early_touchbook_revision(char *p)
 	if (!p)
 		return 0;
 
-	return strict_strtoul(p, 10, &touchbook_revision);
+	return kstrtoul(p, 10, &touchbook_revision);
 }
 early_param("tbr", early_touchbook_revision);
 
diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
index f62f7537d899..ac8a249779f2 100644
--- a/arch/arm/mach-omap2/mux.c
+++ b/arch/arm/mach-omap2/mux.c
@@ -681,29 +681,19 @@ static ssize_t omap_mux_dbg_signal_write(struct file *file,
 					 const char __user *user_buf,
 					 size_t count, loff_t *ppos)
 {
-	char buf[OMAP_MUX_MAX_ARG_CHAR];
 	struct seq_file *seqf;
 	struct omap_mux *m;
-	unsigned long val;
-	int buf_size, ret;
+	u16 val;
+	int ret;
 	struct omap_mux_partition *partition;
 
 	if (count > OMAP_MUX_MAX_ARG_CHAR)
 		return -EINVAL;
 
-	memset(buf, 0, sizeof(buf));
-	buf_size = min(count, sizeof(buf) - 1);
-
-	if (copy_from_user(buf, user_buf, buf_size))
-		return -EFAULT;
-
-	ret = strict_strtoul(buf, 0x10, &val);
+	ret = kstrtou16_from_user(user_buf, count, 0x10, &val);
 	if (ret < 0)
 		return ret;
 
-	if (val > 0xffff)
-		return -EINVAL;
-
 	seqf = file->private_data;
 	m = seqf->private;
 
@@ -711,7 +701,7 @@ static ssize_t omap_mux_dbg_signal_write(struct file *file,
 	if (!partition)
 		return -ENODEV;
 
-	omap_mux_write(partition, (u16)val, m->reg_offset);
+	omap_mux_write(partition, val, m->reg_offset);
 	*ppos += count;
 
 	return count;
@@ -917,14 +907,14 @@ static void __init omap_mux_set_cmdline_signals(void)
 
 	while ((token = strsep(&next_opt, ",")) != NULL) {
 		char *keyval, *name;
-		unsigned long val;
+		u16 val;
 
 		keyval = token;
 		name = strsep(&keyval, "=");
 		if (name) {
 			int res;
 
-			res = strict_strtoul(keyval, 0x10, &val);
+			res = kstrtou16(keyval, 0x10, &val);
 			if (res < 0)
 				continue;
 
diff --git a/arch/arm/mach-pxa/balloon3.c b/arch/arm/mach-pxa/balloon3.c
index 43596e0ed051..d897292712eb 100644
--- a/arch/arm/mach-pxa/balloon3.c
+++ b/arch/arm/mach-pxa/balloon3.c
@@ -90,7 +90,7 @@ int __init parse_balloon3_features(char *arg)
 	if (!arg)
 		return 0;
 
-	return strict_strtoul(arg, 0, &balloon3_features_present);
+	return kstrtoul(arg, 0, &balloon3_features_present);
 }
 early_param("balloon3_features", parse_balloon3_features);
 
diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c
index 41f27f667ca8..de3b08073fe7 100644
--- a/arch/arm/mach-pxa/viper.c
+++ b/arch/arm/mach-pxa/viper.c
@@ -769,7 +769,7 @@ static unsigned long viper_tpm;
 
 static int __init viper_tpm_setup(char *str)
 {
-	return strict_strtoul(str, 10, &viper_tpm) >= 0;
+	return kstrtoul(str, 10, &viper_tpm) >= 0;
 }
 
 __setup("tpm=", viper_tpm_setup);
diff --git a/arch/arm/mach-s3c24xx/mach-jive.c b/arch/arm/mach-s3c24xx/mach-jive.c
index e647b47244a9..7804d3c6991b 100644
--- a/arch/arm/mach-s3c24xx/mach-jive.c
+++ b/arch/arm/mach-s3c24xx/mach-jive.c
@@ -242,7 +242,7 @@ static int __init jive_mtdset(char *options)
 	if (options == NULL || options[0] == '\0')
 		return 0;
 
-	if (strict_strtoul(options, 10, &set)) {
+	if (kstrtoul(options, 10, &set)) {
 		printk(KERN_ERR "failed to parse mtdset=%s\n", options);
 		return 0;
 	}
diff --git a/arch/arm/mach-w90x900/cpu.c b/arch/arm/mach-w90x900/cpu.c
index b1eabaad50a5..213230ee57d1 100644
--- a/arch/arm/mach-w90x900/cpu.c
+++ b/arch/arm/mach-w90x900/cpu.c
@@ -178,7 +178,8 @@ static int __init nuc900_set_cpufreq(char *str)
 	if (!*str)
 		return 0;
 
-	strict_strtoul(str, 0, &cpufreq);
+	if (kstrtoul(str, 0, &cpufreq))
+		return 0;
 
 	nuc900_clock_source(NULL, "ext");
 
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b0f9c9db9590..fd4e81a4e1ce 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1,6 +1,7 @@
 config ARM64
 	def_bool y
 	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
+	select ARCH_HAS_SG_CHAIN
 	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select ARCH_SUPPORTS_ATOMIC_RMW
diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h
index 7a3f462133b0..22b16232bd60 100644
--- a/arch/arm64/include/asm/page.h
+++ b/arch/arm64/include/asm/page.h
@@ -28,9 +28,6 @@
 #define PAGE_SIZE		(_AC(1,UL) << PAGE_SHIFT)
 #define PAGE_MASK		(~(PAGE_SIZE-1))
 
-/* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */
-#define __HAVE_ARCH_GATE_AREA		1
-
 /*
  * The idmap and swapper page tables need some space reserved in the kernel
  * image. Both require pgd, pud (4 levels only) and pmd tables to (section)
diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c
index a81a446a5786..32aeea083d93 100644
--- a/arch/arm64/kernel/vdso.c
+++ b/arch/arm64/kernel/vdso.c
@@ -195,25 +195,6 @@ up_fail:
 }
 
 /*
- * We define AT_SYSINFO_EHDR, so we need these function stubs to keep
- * Linux happy.
- */
-int in_gate_area_no_mm(unsigned long addr)
-{
-	return 0;
-}
-
-int in_gate_area(struct mm_struct *mm, unsigned long addr)
-{
-	return 0;
-}
-
-struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
-{
-	return NULL;
-}
-
-/*
  * Update the vDSO data page to keep in sync with kernel timekeeping.
  */
 void update_vsyscall(struct timekeeper *tk)
diff --git a/arch/cris/include/asm/Kbuild b/arch/cris/include/asm/Kbuild
index afff5105909d..31742dfadff9 100644
--- a/arch/cris/include/asm/Kbuild
+++ b/arch/cris/include/asm/Kbuild
@@ -13,6 +13,7 @@ generic-y += linkage.h
 generic-y += mcs_spinlock.h
 generic-y += module.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
 generic-y += vga.h
 generic-y += xor.h
diff --git a/arch/cris/include/asm/scatterlist.h b/arch/cris/include/asm/scatterlist.h
deleted file mode 100644
index f11f8f40ec4a..000000000000
--- a/arch/cris/include/asm/scatterlist.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef __ASM_CRIS_SCATTERLIST_H
-#define __ASM_CRIS_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* !(__ASM_CRIS_SCATTERLIST_H) */
diff --git a/arch/frv/include/asm/Kbuild b/arch/frv/include/asm/Kbuild
index 87b95eb8aee5..5b73921b6e9d 100644
--- a/arch/frv/include/asm/Kbuild
+++ b/arch/frv/include/asm/Kbuild
@@ -5,4 +5,5 @@ generic-y += exec.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
diff --git a/arch/frv/include/asm/scatterlist.h b/arch/frv/include/asm/scatterlist.h
deleted file mode 100644
index 0e5eb3018468..000000000000
--- a/arch/frv/include/asm/scatterlist.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef _ASM_SCATTERLIST_H
-#define _ASM_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* !_ASM_SCATTERLIST_H */
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 44a6915ab13d..64aefb76bd69 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -28,6 +28,7 @@ config IA64
 	select HAVE_MEMBLOCK
 	select HAVE_MEMBLOCK_NODE_MAP
 	select HAVE_VIRT_CPU_ACCOUNTING
+	select ARCH_HAS_SG_CHAIN
 	select VIRT_TO_BUS
 	select ARCH_DISCARD_MEMBLOCK
 	select GENERIC_IRQ_PROBE
@@ -548,6 +549,8 @@ source "drivers/sn/Kconfig"
 config KEXEC
 	bool "kexec system call"
 	depends on !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
+	select CRYPTO
+	select CRYPTO_SHA256
 	help
 	  kexec is a system call that implements the ability to shutdown your
 	  current kernel, and to start another kernel.  It is like a reboot
diff --git a/arch/ia64/include/asm/Kbuild b/arch/ia64/include/asm/Kbuild
index 0da4aa2602ae..e8317d2d6c8d 100644
--- a/arch/ia64/include/asm/Kbuild
+++ b/arch/ia64/include/asm/Kbuild
@@ -5,5 +5,6 @@ generic-y += hash.h
 generic-y += kvm_para.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
 generic-y += vtime.h
diff --git a/arch/ia64/include/asm/page.h b/arch/ia64/include/asm/page.h
index f1e1b2e3cdb3..1f1bf144fe62 100644
--- a/arch/ia64/include/asm/page.h
+++ b/arch/ia64/include/asm/page.h
@@ -231,4 +231,6 @@ get_order (unsigned long size)
 #define PERCPU_ADDR		(-PERCPU_PAGE_SIZE)
 #define LOAD_OFFSET		(KERNEL_START - KERNEL_TR_PAGE_SIZE)
 
+#define __HAVE_ARCH_GATE_AREA	1
+
 #endif /* _ASM_IA64_PAGE_H */
diff --git a/arch/ia64/include/asm/scatterlist.h b/arch/ia64/include/asm/scatterlist.h
deleted file mode 100644
index 08fd93bff1db..000000000000
--- a/arch/ia64/include/asm/scatterlist.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef _ASM_IA64_SCATTERLIST_H
-#define _ASM_IA64_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-#define ARCH_HAS_SG_CHAIN
-
-#endif /* _ASM_IA64_SCATTERLIST_H */
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 3e71ef85e439..9a0104a38cd3 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -384,21 +384,6 @@ static struct irqaction timer_irqaction = {
 	.name =		"timer"
 };
 
-static struct platform_device rtc_efi_dev = {
-	.name = "rtc-efi",
-	.id = -1,
-};
-
-static int __init rtc_init(void)
-{
-	if (platform_device_register(&rtc_efi_dev) < 0)
-		printk(KERN_ERR "unable to register rtc device...\n");
-
-	/* not necessarily an error */
-	return 0;
-}
-module_init(rtc_init);
-
 void read_persistent_clock(struct timespec *ts)
 {
 	efi_gettimeofday(ts);
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 892d43e32f3b..6b3345758d3e 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -278,6 +278,37 @@ setup_gate (void)
 	ia64_patch_gate();
 }
 
+static struct vm_area_struct gate_vma;
+
+static int __init gate_vma_init(void)
+{
+	gate_vma.vm_mm = NULL;
+	gate_vma.vm_start = FIXADDR_USER_START;
+	gate_vma.vm_end = FIXADDR_USER_END;
+	gate_vma.vm_flags = VM_READ | VM_MAYREAD | VM_EXEC | VM_MAYEXEC;
+	gate_vma.vm_page_prot = __P101;
+
+	return 0;
+}
+__initcall(gate_vma_init);
+
+struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
+{
+	return &gate_vma;
+}
+
+int in_gate_area_no_mm(unsigned long addr)
+{
+	if ((addr >= FIXADDR_USER_START) && (addr < FIXADDR_USER_END))
+		return 1;
+	return 0;
+}
+
+int in_gate_area(struct mm_struct *mm, unsigned long addr)
+{
+	return in_gate_area_no_mm(addr);
+}
+
 void ia64_mmu_init(void *my_cpu_data)
 {
 	unsigned long pta, impl_va_bits;
diff --git a/arch/m32r/include/asm/Kbuild b/arch/m32r/include/asm/Kbuild
index 67779a74b62d..accc10a3dc78 100644
--- a/arch/m32r/include/asm/Kbuild
+++ b/arch/m32r/include/asm/Kbuild
@@ -6,4 +6,5 @@ generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += module.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
diff --git a/arch/m32r/include/asm/scatterlist.h b/arch/m32r/include/asm/scatterlist.h
deleted file mode 100644
index 7370b8b6243e..000000000000
--- a/arch/m32r/include/asm/scatterlist.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef _ASM_M32R_SCATTERLIST_H
-#define _ASM_M32R_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* _ASM_M32R_SCATTERLIST_H */
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 87b7c7581b1d..3ff8c9a25335 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -91,6 +91,8 @@ config MMU_SUN3
 config KEXEC
 	bool "kexec system call"
 	depends on M68KCLASSIC
+	select CRYPTO
+	select CRYPTO_SHA256
 	help
 	  kexec is a system call that implements the ability to shutdown your
 	  current kernel, and to start another kernel.  It is like a reboot
diff --git a/arch/microblaze/include/asm/Kbuild b/arch/microblaze/include/asm/Kbuild
index 35b3ecaf25d5..27a3acda6c19 100644
--- a/arch/microblaze/include/asm/Kbuild
+++ b/arch/microblaze/include/asm/Kbuild
@@ -7,5 +7,6 @@ generic-y += exec.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += syscalls.h
 generic-y += trace_clock.h
diff --git a/arch/microblaze/include/asm/scatterlist.h b/arch/microblaze/include/asm/scatterlist.h
deleted file mode 100644
index 35d786fe93ae..000000000000
--- a/arch/microblaze/include/asm/scatterlist.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/scatterlist.h>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 900c7e5333b6..df51e78a72cc 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2396,6 +2396,8 @@ source "kernel/Kconfig.preempt"
 
 config KEXEC
 	bool "Kexec system call"
+	select CRYPTO
+	select CRYPTO_SHA256
 	help
 	  kexec is a system call that implements the ability to shutdown your
 	  current kernel, and to start another kernel.  It is like a reboot
diff --git a/arch/mn10300/include/asm/Kbuild b/arch/mn10300/include/asm/Kbuild
index 654d5ba6e310..ecbd6676bd33 100644
--- a/arch/mn10300/include/asm/Kbuild
+++ b/arch/mn10300/include/asm/Kbuild
@@ -6,4 +6,5 @@ generic-y += exec.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
diff --git a/arch/mn10300/include/asm/scatterlist.h b/arch/mn10300/include/asm/scatterlist.h
deleted file mode 100644
index 7baa4006008a..000000000000
--- a/arch/mn10300/include/asm/scatterlist.h
+++ /dev/null
@@ -1,16 +0,0 @@
-/* MN10300 Scatterlist definitions
- *
- * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#ifndef _ASM_SCATTERLIST_H
-#define _ASM_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* _ASM_SCATTERLIST_H */
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 80b94b0add1f..a577609f8ed6 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -111,6 +111,7 @@ config PPC
 	select HAVE_DMA_API_DEBUG
 	select HAVE_OPROFILE
 	select HAVE_DEBUG_KMEMLEAK
+	select ARCH_HAS_SG_CHAIN
 	select GENERIC_ATOMIC64 if PPC32
 	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 	select HAVE_PERF_EVENTS
@@ -398,6 +399,8 @@ config PPC64_SUPPORTS_MEMORY_FAILURE
 config KEXEC
 	bool "kexec system call"
 	depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
+	select CRYPTO
+	select CRYPTO_SHA256
 	help
 	  kexec is a system call that implements the ability to shutdown your
 	  current kernel, and to start another kernel.  It is like a reboot
diff --git a/arch/powerpc/include/asm/Kbuild b/arch/powerpc/include/asm/Kbuild
index 3fb1bc432f4f..7f23f162ce9c 100644
--- a/arch/powerpc/include/asm/Kbuild
+++ b/arch/powerpc/include/asm/Kbuild
@@ -4,5 +4,6 @@ generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
 generic-y += rwsem.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
 generic-y += vtime.h
diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
index 32e4e212b9c1..26fe1ae15212 100644
--- a/arch/powerpc/include/asm/page.h
+++ b/arch/powerpc/include/asm/page.h
@@ -48,9 +48,6 @@ extern unsigned int HPAGE_SHIFT;
 #define HUGE_MAX_HSTATE		(MMU_PAGE_COUNT-1)
 #endif
 
-/* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */
-#define __HAVE_ARCH_GATE_AREA		1
-
 /*
  * Subtle: (1 << PAGE_SHIFT) is an int, not an unsigned long. So if we
  * assign PAGE_MASK to a larger type it gets extended the way we want
diff --git a/arch/powerpc/include/asm/scatterlist.h b/arch/powerpc/include/asm/scatterlist.h
deleted file mode 100644
index de1f620bd5c9..000000000000
--- a/arch/powerpc/include/asm/scatterlist.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef _ASM_POWERPC_SCATTERLIST_H
-#define _ASM_POWERPC_SCATTERLIST_H
-/*
- * Copyright (C) 2001 PPC64 Team, IBM Corp
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <asm/dma.h>
-#include <asm-generic/scatterlist.h>
-
-#define ARCH_HAS_SG_CHAIN
-
-#endif /* _ASM_POWERPC_SCATTERLIST_H */
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index d0225572faa1..75d62d63fe68 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -149,13 +149,13 @@ static void check_smt_enabled(void)
 		else if (!strcmp(smt_enabled_cmdline, "off"))
 			smt_enabled_at_boot = 0;
 		else {
-			long smt;
+			int smt;
 			int rc;
 
-			rc = strict_strtol(smt_enabled_cmdline, 10, &smt);
+			rc = kstrtoint(smt_enabled_cmdline, 10, &smt);
 			if (!rc)
 				smt_enabled_at_boot =
-					min(threads_per_core, (int)smt);
+					min(threads_per_core, smt);
 		}
 	} else {
 		dn = of_find_node_by_path("/options");
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index ce74c335a6a4..f174351842cf 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -840,19 +840,3 @@ static int __init vdso_init(void)
 	return 0;
 }
 arch_initcall(vdso_init);
-
-int in_gate_area_no_mm(unsigned long addr)
-{
-	return 0;
-}
-
-int in_gate_area(struct mm_struct *mm, unsigned long addr)
-{
-	return 0;
-}
-
-struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
-{
-	return NULL;
-}
-
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 904c66128fae..5bfdab9047be 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -977,7 +977,7 @@ static ssize_t viodev_cmo_desired_set(struct device *dev,
 	size_t new_desired;
 	int ret;
 
-	ret = strict_strtoul(buf, 10, &new_desired);
+	ret = kstrtoul(buf, 10, &new_desired);
 	if (ret)
 		return ret;
 
diff --git a/arch/powerpc/mm/dma-noncoherent.c b/arch/powerpc/mm/dma-noncoherent.c
index 7b6c10750179..d85e86aac7fb 100644
--- a/arch/powerpc/mm/dma-noncoherent.c
+++ b/arch/powerpc/mm/dma-noncoherent.c
@@ -33,6 +33,7 @@
 #include <linux/export.h>
 
 #include <asm/tlbflush.h>
+#include <asm/dma.h>
 
 #include "mmu_decl.h"
 
diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c
index 534574a97ec9..3a104284b338 100644
--- a/arch/powerpc/platforms/44x/warp.c
+++ b/arch/powerpc/platforms/44x/warp.c
@@ -25,6 +25,7 @@
 #include <asm/time.h>
 #include <asm/uic.h>
 #include <asm/ppc4xx.h>
+#include <asm/dma.h>
 
 
 static __initdata struct of_device_id warp_of_bus[] = {
diff --git a/arch/powerpc/platforms/52xx/efika.c b/arch/powerpc/platforms/52xx/efika.c
index 6e19b0ad5d26..3feffde9128d 100644
--- a/arch/powerpc/platforms/52xx/efika.c
+++ b/arch/powerpc/platforms/52xx/efika.c
@@ -13,6 +13,7 @@
 #include <generated/utsrelease.h>
 #include <linux/pci.h>
 #include <linux/of.h>
+#include <asm/dma.h>
 #include <asm/prom.h>
 #include <asm/time.h>
 #include <asm/machdep.h>
diff --git a/arch/powerpc/platforms/amigaone/setup.c b/arch/powerpc/platforms/amigaone/setup.c
index 03aabc0e16ac..2fe12046279e 100644
--- a/arch/powerpc/platforms/amigaone/setup.c
+++ b/arch/powerpc/platforms/amigaone/setup.c
@@ -24,6 +24,7 @@
 #include <asm/i8259.h>
 #include <asm/time.h>
 #include <asm/udbg.h>
+#include <asm/dma.h>
 
 extern void __flush_disable_L1(void);
 
diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index 2d0b4d68a40a..a2450b8a50a5 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -400,10 +400,10 @@ out:
 static ssize_t dlpar_cpu_probe(const char *buf, size_t count)
 {
 	struct device_node *dn, *parent;
-	unsigned long drc_index;
+	u32 drc_index;
 	int rc;
 
-	rc = strict_strtoul(buf, 0, &drc_index);
+	rc = kstrtou32(buf, 0, &drc_index);
 	if (rc)
 		return -EINVAL;
 
diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c
index d146fef038b8..e7cb6d4a871a 100644
--- a/arch/powerpc/platforms/pseries/mobility.c
+++ b/arch/powerpc/platforms/pseries/mobility.c
@@ -320,7 +320,7 @@ static ssize_t migrate_store(struct class *class, struct class_attribute *attr,
 	u64 streamid;
 	int rc;
 
-	rc = strict_strtoull(buf, 0, &streamid);
+	rc = kstrtou64(buf, 0, &streamid);
 	if (rc)
 		return rc;
 
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 8ca60f8d5683..ab39ceb89ecf 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -48,6 +48,8 @@ config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 
 config KEXEC
 	def_bool y
+	select CRYPTO
+	select CRYPTO_SHA256
 
 config AUDIT_ARCH
 	def_bool y
@@ -145,6 +147,7 @@ config S390
 	select TTY
 	select VIRT_CPU_ACCOUNTING
 	select VIRT_TO_BUS
+	select ARCH_HAS_SG_CHAIN
 
 config SCHED_OMIT_FRAME_POINTER
 	def_bool y
diff --git a/arch/s390/include/asm/Kbuild b/arch/s390/include/asm/Kbuild
index 57892a8a9055..b3fea0722ff1 100644
--- a/arch/s390/include/asm/Kbuild
+++ b/arch/s390/include/asm/Kbuild
@@ -4,4 +4,5 @@ generic-y += clkdev.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h
index 114258eeaacd..7b2ac6e44166 100644
--- a/arch/s390/include/asm/page.h
+++ b/arch/s390/include/asm/page.h
@@ -162,6 +162,4 @@ static inline int devmem_is_allowed(unsigned long pfn)
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>
 
-#define __HAVE_ARCH_GATE_AREA 1
-
 #endif /* _S390_PAGE_H */
diff --git a/arch/s390/include/asm/scatterlist.h b/arch/s390/include/asm/scatterlist.h
deleted file mode 100644
index 6d45ef6c12a7..000000000000
--- a/arch/s390/include/asm/scatterlist.h
+++ /dev/null
@@ -1,3 +0,0 @@
-#include <asm-generic/scatterlist.h>
-
-#define ARCH_HAS_SG_CHAIN
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 613649096783..0bbb7e027c5a 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -316,18 +316,3 @@ static int __init vdso_init(void)
 	return 0;
 }
 early_initcall(vdso_init);
-
-int in_gate_area_no_mm(unsigned long addr)
-{
-	return 0;
-}
-
-int in_gate_area(struct mm_struct *mm, unsigned long addr)
-{
-	return 0;
-}
-
-struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
-{
-	return NULL;
-}
diff --git a/arch/score/include/asm/Kbuild b/arch/score/include/asm/Kbuild
index 2f947aba4bd4..aad209199f7e 100644
--- a/arch/score/include/asm/Kbuild
+++ b/arch/score/include/asm/Kbuild
@@ -8,5 +8,6 @@ generic-y += cputime.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
 generic-y += xor.h
diff --git a/arch/score/include/asm/scatterlist.h b/arch/score/include/asm/scatterlist.h
deleted file mode 100644
index 9f533b8362c7..000000000000
--- a/arch/score/include/asm/scatterlist.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef _ASM_SCORE_SCATTERLIST_H
-#define _ASM_SCORE_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* _ASM_SCORE_SCATTERLIST_H */
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index aa2df3eaeb29..453fa5c09550 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -595,6 +595,8 @@ source kernel/Kconfig.hz
 config KEXEC
 	bool "kexec system call (EXPERIMENTAL)"
 	depends on SUPERH32 && MMU
+	select CRYPTO
+	select CRYPTO_SHA256
 	help
 	  kexec is a system call that implements the ability to shutdown your
 	  current kernel, and to start another kernel.  It is like a reboot
diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
index 15d970328f71..fe20d14ae051 100644
--- a/arch/sh/include/asm/page.h
+++ b/arch/sh/include/asm/page.h
@@ -186,11 +186,6 @@ typedef struct page *pgtable_t;
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>
 
-/* vDSO support */
-#ifdef CONFIG_VSYSCALL
-#define __HAVE_ARCH_GATE_AREA
-#endif
-
 /*
  * Some drivers need to perform DMA into kmalloc'ed buffers
  * and so we have to increase the kmalloc minalign for this.
diff --git a/arch/sh/kernel/vsyscall/vsyscall.c b/arch/sh/kernel/vsyscall/vsyscall.c
index 5ca579720a09..ea2aa1393b87 100644
--- a/arch/sh/kernel/vsyscall/vsyscall.c
+++ b/arch/sh/kernel/vsyscall/vsyscall.c
@@ -92,18 +92,3 @@ const char *arch_vma_name(struct vm_area_struct *vma)
 
 	return NULL;
 }
-
-struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
-{
-	return NULL;
-}
-
-int in_gate_area(struct mm_struct *mm, unsigned long address)
-{
-	return 0;
-}
-
-int in_gate_area_no_mm(unsigned long address)
-{
-	return 0;
-}
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 4692c90936f1..a537816613f9 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -42,6 +42,7 @@ config SPARC
 	select MODULES_USE_ELF_RELA
 	select ODD_RT_SIGACTION
 	select OLD_SIGSUSPEND
+	select ARCH_HAS_SG_CHAIN
 
 config SPARC32
 	def_bool !64BIT
diff --git a/arch/sparc/include/asm/Kbuild b/arch/sparc/include/asm/Kbuild
index a45821818003..cdd1b447bb6c 100644
--- a/arch/sparc/include/asm/Kbuild
+++ b/arch/sparc/include/asm/Kbuild
@@ -15,6 +15,7 @@ generic-y += mcs_spinlock.h
 generic-y += module.h
 generic-y += mutex.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += serial.h
 generic-y += trace_clock.h
 generic-y += types.h
diff --git a/arch/sparc/include/asm/scatterlist.h b/arch/sparc/include/asm/scatterlist.h
deleted file mode 100644
index 92bb638313f8..000000000000
--- a/arch/sparc/include/asm/scatterlist.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef _SPARC_SCATTERLIST_H
-#define _SPARC_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#define ARCH_HAS_SG_CHAIN
-
-#endif /* !(_SPARC_SCATTERLIST_H) */
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 7fcd492adbfc..a3ffe2dd4832 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -191,6 +191,8 @@ source "kernel/Kconfig.hz"
 
 config KEXEC
 	bool "kexec system call"
+	select CRYPTO
+	select CRYPTO_SHA256
 	---help---
 	  kexec is a system call that implements the ability to shutdown your
 	  current kernel, and to start another kernel.  It is like a reboot
diff --git a/arch/tile/include/asm/hardwall.h b/arch/tile/include/asm/hardwall.h
index 2f572b6b7bc2..44d2765bde2b 100644
--- a/arch/tile/include/asm/hardwall.h
+++ b/arch/tile/include/asm/hardwall.h
@@ -23,7 +23,7 @@
 struct proc_dir_entry;
 #ifdef CONFIG_HARDWALL
 void proc_tile_hardwall_init(struct proc_dir_entry *root);
-int proc_pid_hardwall(struct task_struct *task, char *buffer);
+int proc_pid_hardwall(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task);
 #else
 static inline void proc_tile_hardwall_init(struct proc_dir_entry *root) {}
 #endif
diff --git a/arch/tile/include/asm/page.h b/arch/tile/include/asm/page.h
index 672768008618..a213a8d84a95 100644
--- a/arch/tile/include/asm/page.h
+++ b/arch/tile/include/asm/page.h
@@ -39,12 +39,6 @@
 #define HPAGE_MASK	(~(HPAGE_SIZE - 1))
 
 /*
- * We do define AT_SYSINFO_EHDR to support vDSO,
- * but don't use the gate mechanism.
- */
-#define __HAVE_ARCH_GATE_AREA		1
-
-/*
  * If the Kconfig doesn't specify, set a maximum zone order that
  * is enough so that we can create huge pages from small pages given
  * the respective sizes of the two page types.  See <linux/mmzone.h>.
diff --git a/arch/tile/kernel/hardwall.c b/arch/tile/kernel/hardwall.c
index 531f4c365351..aca6000bca75 100644
--- a/arch/tile/kernel/hardwall.c
+++ b/arch/tile/kernel/hardwall.c
@@ -947,15 +947,15 @@ static void hardwall_remove_proc(struct hardwall_info *info)
 	remove_proc_entry(buf, info->type->proc_dir);
 }
 
-int proc_pid_hardwall(struct task_struct *task, char *buffer)
+int proc_pid_hardwall(struct seq_file *m, struct pid_namespace *ns,
+		      struct pid *pid, struct task_struct *task)
 {
 	int i;
 	int n = 0;
 	for (i = 0; i < HARDWALL_TYPES; ++i) {
 		struct hardwall_info *info = task->thread.hardwall[i].info;
 		if (info)
-			n += sprintf(&buffer[n], "%s: %d\n",
-				     info->type->name, info->id);
+			seq_printf(m, "%s: %d\n", info->type->name, info->id);
 	}
 	return n;
 }
diff --git a/arch/tile/kernel/vdso.c b/arch/tile/kernel/vdso.c
index 1533af24106e..5bc51d7dfdcb 100644
--- a/arch/tile/kernel/vdso.c
+++ b/arch/tile/kernel/vdso.c
@@ -121,21 +121,6 @@ const char *arch_vma_name(struct vm_area_struct *vma)
 	return NULL;
 }
 
-struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
-{
-	return NULL;
-}
-
-int in_gate_area(struct mm_struct *mm, unsigned long address)
-{
-	return 0;
-}
-
-int in_gate_area_no_mm(unsigned long address)
-{
-	return 0;
-}
-
 int setup_vdso_pages(void)
 {
 	struct page **pagelist;
diff --git a/arch/um/include/asm/Kbuild b/arch/um/include/asm/Kbuild
index a5e4b6068213..7bd64aa2e94a 100644
--- a/arch/um/include/asm/Kbuild
+++ b/arch/um/include/asm/Kbuild
@@ -21,6 +21,7 @@ generic-y += param.h
 generic-y += pci.h
 generic-y += percpu.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += sections.h
 generic-y += switch_to.h
 generic-y += topology.h
diff --git a/arch/um/include/asm/page.h b/arch/um/include/asm/page.h
index 5ff53d9185f7..71c5d132062a 100644
--- a/arch/um/include/asm/page.h
+++ b/arch/um/include/asm/page.h
@@ -119,4 +119,9 @@ extern unsigned long uml_physmem;
 #include <asm-generic/getorder.h>
 
 #endif	/* __ASSEMBLY__ */
+
+#ifdef CONFIG_X86_32
+#define __HAVE_ARCH_GATE_AREA 1
+#endif
+
 #endif	/* __UM_PAGE_H */
diff --git a/arch/x86/Kbuild b/arch/x86/Kbuild
index e5287d8517aa..61b6d51866f8 100644
--- a/arch/x86/Kbuild
+++ b/arch/x86/Kbuild
@@ -16,3 +16,7 @@ obj-$(CONFIG_IA32_EMULATION) += ia32/
 
 obj-y += platform/
 obj-y += net/
+
+ifeq ($(CONFIG_X86_64),y)
+obj-$(CONFIG_KEXEC) += purgatory/
+endif
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index bf2405053af5..4aafd322e21e 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -96,6 +96,7 @@ config X86
 	select IRQ_FORCED_THREADING
 	select HAVE_BPF_JIT if X86_64
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
+	select ARCH_HAS_SG_CHAIN
 	select CLKEVT_I8253
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_IOMAP
@@ -1581,6 +1582,9 @@ source kernel/Kconfig.hz
 
 config KEXEC
 	bool "kexec system call"
+	select BUILD_BIN2C
+	select CRYPTO
+	select CRYPTO_SHA256
 	---help---
 	  kexec is a system call that implements the ability to shutdown your
 	  current kernel, and to start another kernel.  It is like a reboot
@@ -1595,6 +1599,28 @@ config KEXEC
 	  interface is strongly in flux, so no good recommendation can be
 	  made.
 
+config KEXEC_VERIFY_SIG
+	bool "Verify kernel signature during kexec_file_load() syscall"
+	depends on KEXEC
+	---help---
+	  This option makes kernel signature verification mandatory for
+	  kexec_file_load() syscall. If kernel is signature can not be
+	  verified, kexec_file_load() will fail.
+
+	  This option enforces signature verification at generic level.
+	  One needs to enable signature verification for type of kernel
+	  image being loaded to make sure it works. For example, enable
+	  bzImage signature verification option to be able to load and
+	  verify signatures of bzImage. Otherwise kernel loading will fail.
+
+config KEXEC_BZIMAGE_VERIFY_SIG
+	bool "Enable bzImage signature verification support"
+	depends on KEXEC_VERIFY_SIG
+	depends on SIGNED_PE_FILE_VERIFICATION
+	select SYSTEM_TRUSTED_KEYRING
+	---help---
+	  Enable bzImage signature verification support.
+
 config CRASH_DUMP
 	bool "kernel crash dumps"
 	depends on X86_64 || (X86_32 && HIGHMEM)
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index c65fd9650467..c1aa36887843 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -183,6 +183,14 @@ archscripts: scripts_basic
 archheaders:
 	$(Q)$(MAKE) $(build)=arch/x86/syscalls all
 
+archprepare:
+ifeq ($(CONFIG_KEXEC),y)
+# Build only for 64bit. No loaders for 32bit yet.
+ ifeq ($(CONFIG_X86_64),y)
+	$(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c
+ endif
+endif
+
 ###
 # Kernel objects
 
diff --git a/arch/x86/include/asm/Kbuild b/arch/x86/include/asm/Kbuild
index 3ca9762e1649..3bf000fab0ae 100644
--- a/arch/x86/include/asm/Kbuild
+++ b/arch/x86/include/asm/Kbuild
@@ -5,6 +5,7 @@ genhdr-y += unistd_64.h
 genhdr-y += unistd_x32.h
 
 generic-y += clkdev.h
-generic-y += early_ioremap.h
 generic-y += cputime.h
+generic-y += early_ioremap.h
 generic-y += mcs_spinlock.h
+generic-y += scatterlist.h
diff --git a/arch/x86/include/asm/crash.h b/arch/x86/include/asm/crash.h
new file mode 100644
index 000000000000..f498411f2500
--- /dev/null
+++ b/arch/x86/include/asm/crash.h
@@ -0,0 +1,9 @@
+#ifndef _ASM_X86_CRASH_H
+#define _ASM_X86_CRASH_H
+
+int crash_load_segments(struct kimage *image);
+int crash_copy_backup_region(struct kimage *image);
+int crash_setup_memmap_entries(struct kimage *image,
+		struct boot_params *params);
+
+#endif /* _ASM_X86_CRASH_H */
diff --git a/arch/x86/include/asm/kexec-bzimage64.h b/arch/x86/include/asm/kexec-bzimage64.h
new file mode 100644
index 000000000000..d1b5d194e31d
--- /dev/null
+++ b/arch/x86/include/asm/kexec-bzimage64.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_KEXEC_BZIMAGE64_H
+#define _ASM_KEXEC_BZIMAGE64_H
+
+extern struct kexec_file_ops kexec_bzImage64_ops;
+
+#endif  /* _ASM_KEXE_BZIMAGE64_H */
diff --git a/arch/x86/include/asm/kexec.h b/arch/x86/include/asm/kexec.h
index 17483a492f18..d2434c1cad05 100644
--- a/arch/x86/include/asm/kexec.h
+++ b/arch/x86/include/asm/kexec.h
@@ -23,6 +23,9 @@
 
 #include <asm/page.h>
 #include <asm/ptrace.h>
+#include <asm/bootparam.h>
+
+struct kimage;
 
 /*
  * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
@@ -61,6 +64,10 @@
 # define KEXEC_ARCH KEXEC_ARCH_X86_64
 #endif
 
+/* Memory to backup during crash kdump */
+#define KEXEC_BACKUP_SRC_START	(0UL)
+#define KEXEC_BACKUP_SRC_END	(640 * 1024UL)	/* 640K */
+
 /*
  * CPU does not save ss and sp on stack if execution is already
  * running in kernel mode at the time of NMI occurrence. This code
@@ -160,6 +167,44 @@ struct kimage_arch {
 	pud_t *pud;
 	pmd_t *pmd;
 	pte_t *pte;
+	/* Details of backup region */
+	unsigned long backup_src_start;
+	unsigned long backup_src_sz;
+
+	/* Physical address of backup segment */
+	unsigned long backup_load_addr;
+
+	/* Core ELF header buffer */
+	void *elf_headers;
+	unsigned long elf_headers_sz;
+	unsigned long elf_load_addr;
+};
+#endif /* CONFIG_X86_32 */
+
+#ifdef CONFIG_X86_64
+/*
+ * Number of elements and order of elements in this structure should match
+ * with the ones in arch/x86/purgatory/entry64.S. If you make a change here
+ * make an appropriate change in purgatory too.
+ */
+struct kexec_entry64_regs {
+	uint64_t rax;
+	uint64_t rcx;
+	uint64_t rdx;
+	uint64_t rbx;
+	uint64_t rsp;
+	uint64_t rbp;
+	uint64_t rsi;
+	uint64_t rdi;
+	uint64_t r8;
+	uint64_t r9;
+	uint64_t r10;
+	uint64_t r11;
+	uint64_t r12;
+	uint64_t r13;
+	uint64_t r14;
+	uint64_t r15;
+	uint64_t rip;
 };
 #endif
 
diff --git a/arch/x86/include/asm/page.h b/arch/x86/include/asm/page.h
index 775873d3be55..802dde30c928 100644
--- a/arch/x86/include/asm/page.h
+++ b/arch/x86/include/asm/page.h
@@ -70,7 +70,6 @@ extern bool __virt_addr_valid(unsigned long kaddr);
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>
 
-#define __HAVE_ARCH_GATE_AREA 1
 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
 
 #endif	/* __KERNEL__ */
diff --git a/arch/x86/include/asm/page_64.h b/arch/x86/include/asm/page_64.h
index 0f1ddee6a0ce..f408caf73430 100644
--- a/arch/x86/include/asm/page_64.h
+++ b/arch/x86/include/asm/page_64.h
@@ -39,4 +39,6 @@ void copy_page(void *to, void *from);
 
 #endif	/* !__ASSEMBLY__ */
 
+#define __HAVE_ARCH_GATE_AREA 1
+
 #endif /* _ASM_X86_PAGE_64_H */
diff --git a/arch/x86/include/asm/scatterlist.h b/arch/x86/include/asm/scatterlist.h
deleted file mode 100644
index 4240878b9d76..000000000000
--- a/arch/x86/include/asm/scatterlist.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef _ASM_X86_SCATTERLIST_H
-#define _ASM_X86_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#define ARCH_HAS_SG_CHAIN
-
-#endif /* _ASM_X86_SCATTERLIST_H */
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index bde3993624f1..b5ea75c4a4b4 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -118,4 +118,5 @@ ifeq ($(CONFIG_X86_64),y)
 
 	obj-$(CONFIG_PCI_MMCONFIG)	+= mmconf-fam10h_64.o
 	obj-y				+= vsmp_64.o
+	obj-$(CONFIG_KEXEC)		+= kexec-bzimage64.o
 endif
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 9c8f7394c612..c7035073dfc1 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -461,7 +461,7 @@ static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf,
 
 	cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
 
-	if (strict_strtoul(buf, 10, &val) < 0)
+	if (kstrtoul(buf, 10, &val) < 0)
 		return -EINVAL;
 
 	err = amd_set_l3_disable_slot(this_leaf->base.nb, cpu, slot, val);
@@ -511,7 +511,7 @@ store_subcaches(struct _cpuid4_info *this_leaf, const char *buf, size_t count,
 	if (!this_leaf->base.nb || !amd_nb_has_feature(AMD_NB_L3_PARTITIONING))
 		return -EINVAL;
 
-	if (strict_strtoul(buf, 16, &val) < 0)
+	if (kstrtoul(buf, 16, &val) < 0)
 		return -EINVAL;
 
 	if (amd_set_subcaches(cpu, val))
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 4fc57975acc1..bd9ccda8087f 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -2136,7 +2136,7 @@ static ssize_t set_bank(struct device *s, struct device_attribute *attr,
 {
 	u64 new;
 
-	if (strict_strtoull(buf, 0, &new) < 0)
+	if (kstrtou64(buf, 0, &new) < 0)
 		return -EINVAL;
 
 	attr_to_bank(attr)->ctl = new;
@@ -2174,7 +2174,7 @@ static ssize_t set_ignore_ce(struct device *s,
 {
 	u64 new;
 
-	if (strict_strtoull(buf, 0, &new) < 0)
+	if (kstrtou64(buf, 0, &new) < 0)
 		return -EINVAL;
 
 	if (mca_cfg.ignore_ce ^ !!new) {
@@ -2198,7 +2198,7 @@ static ssize_t set_cmci_disabled(struct device *s,
 {
 	u64 new;
 
-	if (strict_strtoull(buf, 0, &new) < 0)
+	if (kstrtou64(buf, 0, &new) < 0)
 		return -EINVAL;
 
 	if (mca_cfg.cmci_disabled ^ !!new) {
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index 603df4f74640..1e49f8f41276 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -353,7 +353,7 @@ store_interrupt_enable(struct threshold_block *b, const char *buf, size_t size)
 	if (!b->interrupt_capable)
 		return -EINVAL;
 
-	if (strict_strtoul(buf, 0, &new) < 0)
+	if (kstrtoul(buf, 0, &new) < 0)
 		return -EINVAL;
 
 	b->interrupt_enable = !!new;
@@ -372,7 +372,7 @@ store_threshold_limit(struct threshold_block *b, const char *buf, size_t size)
 	struct thresh_restart tr;
 	unsigned long new;
 
-	if (strict_strtoul(buf, 0, &new) < 0)
+	if (kstrtoul(buf, 0, &new) < 0)
 		return -EINVAL;
 
 	if (new > THRESHOLD_MAX)
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 507de8066594..0553a34fa0df 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -4,9 +4,14 @@
  * Created by: Hariprasad Nellitheertha (hari@in.ibm.com)
  *
  * Copyright (C) IBM Corporation, 2004. All rights reserved.
+ * Copyright (C) Red Hat Inc., 2014. All rights reserved.
+ * Authors:
+ *      Vivek Goyal <vgoyal@redhat.com>
  *
  */
 
+#define pr_fmt(fmt)	"kexec: " fmt
+
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/smp.h>
@@ -16,6 +21,7 @@
 #include <linux/elf.h>
 #include <linux/elfcore.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 
 #include <asm/processor.h>
 #include <asm/hardirq.h>
@@ -28,6 +34,45 @@
 #include <asm/reboot.h>
 #include <asm/virtext.h>
 
+/* Alignment required for elf header segment */
+#define ELF_CORE_HEADER_ALIGN   4096
+
+/* This primarily represents number of split ranges due to exclusion */
+#define CRASH_MAX_RANGES	16
+
+struct crash_mem_range {
+	u64 start, end;
+};
+
+struct crash_mem {
+	unsigned int nr_ranges;
+	struct crash_mem_range ranges[CRASH_MAX_RANGES];
+};
+
+/* Misc data about ram ranges needed to prepare elf headers */
+struct crash_elf_data {
+	struct kimage *image;
+	/*
+	 * Total number of ram ranges we have after various adjustments for
+	 * GART, crash reserved region etc.
+	 */
+	unsigned int max_nr_ranges;
+	unsigned long gart_start, gart_end;
+
+	/* Pointer to elf header */
+	void *ehdr;
+	/* Pointer to next phdr */
+	void *bufp;
+	struct crash_mem mem;
+};
+
+/* Used while preparing memory map entries for second kernel */
+struct crash_memmap_data {
+	struct boot_params *params;
+	/* Type of memory */
+	unsigned int type;
+};
+
 int in_crash_kexec;
 
 /*
@@ -39,6 +84,7 @@ int in_crash_kexec;
  */
 crash_vmclear_fn __rcu *crash_vmclear_loaded_vmcss = NULL;
 EXPORT_SYMBOL_GPL(crash_vmclear_loaded_vmcss);
+unsigned long crash_zero_bytes;
 
 static inline void cpu_crash_vmclear_loaded_vmcss(void)
 {
@@ -135,3 +181,520 @@ void native_machine_crash_shutdown(struct pt_regs *regs)
 #endif
 	crash_save_cpu(regs, safe_smp_processor_id());
 }
+
+#ifdef CONFIG_X86_64
+
+static int get_nr_ram_ranges_callback(unsigned long start_pfn,
+				unsigned long nr_pfn, void *arg)
+{
+	int *nr_ranges = arg;
+
+	(*nr_ranges)++;
+	return 0;
+}
+
+static int get_gart_ranges_callback(u64 start, u64 end, void *arg)
+{
+	struct crash_elf_data *ced = arg;
+
+	ced->gart_start = start;
+	ced->gart_end = end;
+
+	/* Not expecting more than 1 gart aperture */
+	return 1;
+}
+
+
+/* Gather all the required information to prepare elf headers for ram regions */
+static void fill_up_crash_elf_data(struct crash_elf_data *ced,
+				   struct kimage *image)
+{
+	unsigned int nr_ranges = 0;
+
+	ced->image = image;
+
+	walk_system_ram_range(0, -1, &nr_ranges,
+				get_nr_ram_ranges_callback);
+
+	ced->max_nr_ranges = nr_ranges;
+
+	/*
+	 * We don't create ELF headers for GART aperture as an attempt
+	 * to dump this memory in second kernel leads to hang/crash.
+	 * If gart aperture is present, one needs to exclude that region
+	 * and that could lead to need of extra phdr.
+	 */
+	walk_iomem_res("GART", IORESOURCE_MEM, 0, -1,
+				ced, get_gart_ranges_callback);
+
+	/*
+	 * If we have gart region, excluding that could potentially split
+	 * a memory range, resulting in extra header. Account for  that.
+	 */
+	if (ced->gart_end)
+		ced->max_nr_ranges++;
+
+	/* Exclusion of crash region could split memory ranges */
+	ced->max_nr_ranges++;
+
+	/* If crashk_low_res is not 0, another range split possible */
+	if (crashk_low_res.end != 0)
+		ced->max_nr_ranges++;
+}
+
+static int exclude_mem_range(struct crash_mem *mem,
+		unsigned long long mstart, unsigned long long mend)
+{
+	int i, j;
+	unsigned long long start, end;
+	struct crash_mem_range temp_range = {0, 0};
+
+	for (i = 0; i < mem->nr_ranges; i++) {
+		start = mem->ranges[i].start;
+		end = mem->ranges[i].end;
+
+		if (mstart > end || mend < start)
+			continue;
+
+		/* Truncate any area outside of range */
+		if (mstart < start)
+			mstart = start;
+		if (mend > end)
+			mend = end;
+
+		/* Found completely overlapping range */
+		if (mstart == start && mend == end) {
+			mem->ranges[i].start = 0;
+			mem->ranges[i].end = 0;
+			if (i < mem->nr_ranges - 1) {
+				/* Shift rest of the ranges to left */
+				for (j = i; j < mem->nr_ranges - 1; j++) {
+					mem->ranges[j].start =
+						mem->ranges[j+1].start;
+					mem->ranges[j].end =
+							mem->ranges[j+1].end;
+				}
+			}
+			mem->nr_ranges--;
+			return 0;
+		}
+
+		if (mstart > start && mend < end) {
+			/* Split original range */
+			mem->ranges[i].end = mstart - 1;
+			temp_range.start = mend + 1;
+			temp_range.end = end;
+		} else if (mstart != start)
+			mem->ranges[i].end = mstart - 1;
+		else
+			mem->ranges[i].start = mend + 1;
+		break;
+	}
+
+	/* If a split happend, add the split to array */
+	if (!temp_range.end)
+		return 0;
+
+	/* Split happened */
+	if (i == CRASH_MAX_RANGES - 1) {
+		pr_err("Too many crash ranges after split\n");
+		return -ENOMEM;
+	}
+
+	/* Location where new range should go */
+	j = i + 1;
+	if (j < mem->nr_ranges) {
+		/* Move over all ranges one slot towards the end */
+		for (i = mem->nr_ranges - 1; i >= j; i--)
+			mem->ranges[i + 1] = mem->ranges[i];
+	}
+
+	mem->ranges[j].start = temp_range.start;
+	mem->ranges[j].end = temp_range.end;
+	mem->nr_ranges++;
+	return 0;
+}
+
+/*
+ * Look for any unwanted ranges between mstart, mend and remove them. This
+ * might lead to split and split ranges are put in ced->mem.ranges[] array
+ */
+static int elf_header_exclude_ranges(struct crash_elf_data *ced,
+		unsigned long long mstart, unsigned long long mend)
+{
+	struct crash_mem *cmem = &ced->mem;
+	int ret = 0;
+
+	memset(cmem->ranges, 0, sizeof(cmem->ranges));
+
+	cmem->ranges[0].start = mstart;
+	cmem->ranges[0].end = mend;
+	cmem->nr_ranges = 1;
+
+	/* Exclude crashkernel region */
+	ret = exclude_mem_range(cmem, crashk_res.start, crashk_res.end);
+	if (ret)
+		return ret;
+
+	ret = exclude_mem_range(cmem, crashk_low_res.start, crashk_low_res.end);
+	if (ret)
+		return ret;
+
+	/* Exclude GART region */
+	if (ced->gart_end) {
+		ret = exclude_mem_range(cmem, ced->gart_start, ced->gart_end);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+
+static int prepare_elf64_ram_headers_callback(u64 start, u64 end, void *arg)
+{
+	struct crash_elf_data *ced = arg;
+	Elf64_Ehdr *ehdr;
+	Elf64_Phdr *phdr;
+	unsigned long mstart, mend;
+	struct kimage *image = ced->image;
+	struct crash_mem *cmem;
+	int ret, i;
+
+	ehdr = ced->ehdr;
+
+	/* Exclude unwanted mem ranges */
+	ret = elf_header_exclude_ranges(ced, start, end);
+	if (ret)
+		return ret;
+
+	/* Go through all the ranges in ced->mem.ranges[] and prepare phdr */
+	cmem = &ced->mem;
+
+	for (i = 0; i < cmem->nr_ranges; i++) {
+		mstart = cmem->ranges[i].start;
+		mend = cmem->ranges[i].end;
+
+		phdr = ced->bufp;
+		ced->bufp += sizeof(Elf64_Phdr);
+
+		phdr->p_type = PT_LOAD;
+		phdr->p_flags = PF_R|PF_W|PF_X;
+		phdr->p_offset  = mstart;
+
+		/*
+		 * If a range matches backup region, adjust offset to backup
+		 * segment.
+		 */
+		if (mstart == image->arch.backup_src_start &&
+		    (mend - mstart + 1) == image->arch.backup_src_sz)
+			phdr->p_offset = image->arch.backup_load_addr;
+
+		phdr->p_paddr = mstart;
+		phdr->p_vaddr = (unsigned long long) __va(mstart);
+		phdr->p_filesz = phdr->p_memsz = mend - mstart + 1;
+		phdr->p_align = 0;
+		ehdr->e_phnum++;
+		pr_debug("Crash PT_LOAD elf header. phdr=%p vaddr=0x%llx, paddr=0x%llx, sz=0x%llx e_phnum=%d p_offset=0x%llx\n",
+			phdr, phdr->p_vaddr, phdr->p_paddr, phdr->p_filesz,
+			ehdr->e_phnum, phdr->p_offset);
+	}
+
+	return ret;
+}
+
+static int prepare_elf64_headers(struct crash_elf_data *ced,
+		void **addr, unsigned long *sz)
+{
+	Elf64_Ehdr *ehdr;
+	Elf64_Phdr *phdr;
+	unsigned long nr_cpus = num_possible_cpus(), nr_phdr, elf_sz;
+	unsigned char *buf, *bufp;
+	unsigned int cpu;
+	unsigned long long notes_addr;
+	int ret;
+
+	/* extra phdr for vmcoreinfo elf note */
+	nr_phdr = nr_cpus + 1;
+	nr_phdr += ced->max_nr_ranges;
+
+	/*
+	 * kexec-tools creates an extra PT_LOAD phdr for kernel text mapping
+	 * area on x86_64 (ffffffff80000000 - ffffffffa0000000).
+	 * I think this is required by tools like gdb. So same physical
+	 * memory will be mapped in two elf headers. One will contain kernel
+	 * text virtual addresses and other will have __va(physical) addresses.
+	 */
+
+	nr_phdr++;
+	elf_sz = sizeof(Elf64_Ehdr) + nr_phdr * sizeof(Elf64_Phdr);
+	elf_sz = ALIGN(elf_sz, ELF_CORE_HEADER_ALIGN);
+
+	buf = vzalloc(elf_sz);
+	if (!buf)
+		return -ENOMEM;
+
+	bufp = buf;
+	ehdr = (Elf64_Ehdr *)bufp;
+	bufp += sizeof(Elf64_Ehdr);
+	memcpy(ehdr->e_ident, ELFMAG, SELFMAG);
+	ehdr->e_ident[EI_CLASS] = ELFCLASS64;
+	ehdr->e_ident[EI_DATA] = ELFDATA2LSB;
+	ehdr->e_ident[EI_VERSION] = EV_CURRENT;
+	ehdr->e_ident[EI_OSABI] = ELF_OSABI;
+	memset(ehdr->e_ident + EI_PAD, 0, EI_NIDENT - EI_PAD);
+	ehdr->e_type = ET_CORE;
+	ehdr->e_machine = ELF_ARCH;
+	ehdr->e_version = EV_CURRENT;
+	ehdr->e_phoff = sizeof(Elf64_Ehdr);
+	ehdr->e_ehsize = sizeof(Elf64_Ehdr);
+	ehdr->e_phentsize = sizeof(Elf64_Phdr);
+
+	/* Prepare one phdr of type PT_NOTE for each present cpu */
+	for_each_present_cpu(cpu) {
+		phdr = (Elf64_Phdr *)bufp;
+		bufp += sizeof(Elf64_Phdr);
+		phdr->p_type = PT_NOTE;
+		notes_addr = per_cpu_ptr_to_phys(per_cpu_ptr(crash_notes, cpu));
+		phdr->p_offset = phdr->p_paddr = notes_addr;
+		phdr->p_filesz = phdr->p_memsz = sizeof(note_buf_t);
+		(ehdr->e_phnum)++;
+	}
+
+	/* Prepare one PT_NOTE header for vmcoreinfo */
+	phdr = (Elf64_Phdr *)bufp;
+	bufp += sizeof(Elf64_Phdr);
+	phdr->p_type = PT_NOTE;
+	phdr->p_offset = phdr->p_paddr = paddr_vmcoreinfo_note();
+	phdr->p_filesz = phdr->p_memsz = sizeof(vmcoreinfo_note);
+	(ehdr->e_phnum)++;
+
+#ifdef CONFIG_X86_64
+	/* Prepare PT_LOAD type program header for kernel text region */
+	phdr = (Elf64_Phdr *)bufp;
+	bufp += sizeof(Elf64_Phdr);
+	phdr->p_type = PT_LOAD;
+	phdr->p_flags = PF_R|PF_W|PF_X;
+	phdr->p_vaddr = (Elf64_Addr)_text;
+	phdr->p_filesz = phdr->p_memsz = _end - _text;
+	phdr->p_offset = phdr->p_paddr = __pa_symbol(_text);
+	(ehdr->e_phnum)++;
+#endif
+
+	/* Prepare PT_LOAD headers for system ram chunks. */
+	ced->ehdr = ehdr;
+	ced->bufp = bufp;
+	ret = walk_system_ram_res(0, -1, ced,
+			prepare_elf64_ram_headers_callback);
+	if (ret < 0)
+		return ret;
+
+	*addr = buf;
+	*sz = elf_sz;
+	return 0;
+}
+
+/* Prepare elf headers. Return addr and size */
+static int prepare_elf_headers(struct kimage *image, void **addr,
+					unsigned long *sz)
+{
+	struct crash_elf_data *ced;
+	int ret;
+
+	ced = kzalloc(sizeof(*ced), GFP_KERNEL);
+	if (!ced)
+		return -ENOMEM;
+
+	fill_up_crash_elf_data(ced, image);
+
+	/* By default prepare 64bit headers */
+	ret =  prepare_elf64_headers(ced, addr, sz);
+	kfree(ced);
+	return ret;
+}
+
+static int add_e820_entry(struct boot_params *params, struct e820entry *entry)
+{
+	unsigned int nr_e820_entries;
+
+	nr_e820_entries = params->e820_entries;
+	if (nr_e820_entries >= E820MAX)
+		return 1;
+
+	memcpy(&params->e820_map[nr_e820_entries], entry,
+			sizeof(struct e820entry));
+	params->e820_entries++;
+	return 0;
+}
+
+static int memmap_entry_callback(u64 start, u64 end, void *arg)
+{
+	struct crash_memmap_data *cmd = arg;
+	struct boot_params *params = cmd->params;
+	struct e820entry ei;
+
+	ei.addr = start;
+	ei.size = end - start + 1;
+	ei.type = cmd->type;
+	add_e820_entry(params, &ei);
+
+	return 0;
+}
+
+static int memmap_exclude_ranges(struct kimage *image, struct crash_mem *cmem,
+				 unsigned long long mstart,
+				 unsigned long long mend)
+{
+	unsigned long start, end;
+	int ret = 0;
+
+	cmem->ranges[0].start = mstart;
+	cmem->ranges[0].end = mend;
+	cmem->nr_ranges = 1;
+
+	/* Exclude Backup region */
+	start = image->arch.backup_load_addr;
+	end = start + image->arch.backup_src_sz - 1;
+	ret = exclude_mem_range(cmem, start, end);
+	if (ret)
+		return ret;
+
+	/* Exclude elf header region */
+	start = image->arch.elf_load_addr;
+	end = start + image->arch.elf_headers_sz - 1;
+	return exclude_mem_range(cmem, start, end);
+}
+
+/* Prepare memory map for crash dump kernel */
+int crash_setup_memmap_entries(struct kimage *image, struct boot_params *params)
+{
+	int i, ret = 0;
+	unsigned long flags;
+	struct e820entry ei;
+	struct crash_memmap_data cmd;
+	struct crash_mem *cmem;
+
+	cmem = vzalloc(sizeof(struct crash_mem));
+	if (!cmem)
+		return -ENOMEM;
+
+	memset(&cmd, 0, sizeof(struct crash_memmap_data));
+	cmd.params = params;
+
+	/* Add first 640K segment */
+	ei.addr = image->arch.backup_src_start;
+	ei.size = image->arch.backup_src_sz;
+	ei.type = E820_RAM;
+	add_e820_entry(params, &ei);
+
+	/* Add ACPI tables */
+	cmd.type = E820_ACPI;
+	flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+	walk_iomem_res("ACPI Tables", flags, 0, -1, &cmd,
+		       memmap_entry_callback);
+
+	/* Add ACPI Non-volatile Storage */
+	cmd.type = E820_NVS;
+	walk_iomem_res("ACPI Non-volatile Storage", flags, 0, -1, &cmd,
+			memmap_entry_callback);
+
+	/* Add crashk_low_res region */
+	if (crashk_low_res.end) {
+		ei.addr = crashk_low_res.start;
+		ei.size = crashk_low_res.end - crashk_low_res.start + 1;
+		ei.type = E820_RAM;
+		add_e820_entry(params, &ei);
+	}
+
+	/* Exclude some ranges from crashk_res and add rest to memmap */
+	ret = memmap_exclude_ranges(image, cmem, crashk_res.start,
+						crashk_res.end);
+	if (ret)
+		goto out;
+
+	for (i = 0; i < cmem->nr_ranges; i++) {
+		ei.size = cmem->ranges[i].end - cmem->ranges[i].start + 1;
+
+		/* If entry is less than a page, skip it */
+		if (ei.size < PAGE_SIZE)
+			continue;
+		ei.addr = cmem->ranges[i].start;
+		ei.type = E820_RAM;
+		add_e820_entry(params, &ei);
+	}
+
+out:
+	vfree(cmem);
+	return ret;
+}
+
+static int determine_backup_region(u64 start, u64 end, void *arg)
+{
+	struct kimage *image = arg;
+
+	image->arch.backup_src_start = start;
+	image->arch.backup_src_sz = end - start + 1;
+
+	/* Expecting only one range for backup region */
+	return 1;
+}
+
+int crash_load_segments(struct kimage *image)
+{
+	unsigned long src_start, src_sz, elf_sz;
+	void *elf_addr;
+	int ret;
+
+	/*
+	 * Determine and load a segment for backup area. First 640K RAM
+	 * region is backup source
+	 */
+
+	ret = walk_system_ram_res(KEXEC_BACKUP_SRC_START, KEXEC_BACKUP_SRC_END,
+				image, determine_backup_region);
+
+	/* Zero or postive return values are ok */
+	if (ret < 0)
+		return ret;
+
+	src_start = image->arch.backup_src_start;
+	src_sz = image->arch.backup_src_sz;
+
+	/* Add backup segment. */
+	if (src_sz) {
+		/*
+		 * Ideally there is no source for backup segment. This is
+		 * copied in purgatory after crash. Just add a zero filled
+		 * segment for now to make sure checksum logic works fine.
+		 */
+		ret = kexec_add_buffer(image, (char *)&crash_zero_bytes,
+				       sizeof(crash_zero_bytes), src_sz,
+				       PAGE_SIZE, 0, -1, 0,
+				       &image->arch.backup_load_addr);
+		if (ret)
+			return ret;
+		pr_debug("Loaded backup region at 0x%lx backup_start=0x%lx memsz=0x%lx\n",
+			 image->arch.backup_load_addr, src_start, src_sz);
+	}
+
+	/* Prepare elf headers and add a segment */
+	ret = prepare_elf_headers(image, &elf_addr, &elf_sz);
+	if (ret)
+		return ret;
+
+	image->arch.elf_headers = elf_addr;
+	image->arch.elf_headers_sz = elf_sz;
+
+	ret = kexec_add_buffer(image, (char *)elf_addr, elf_sz, elf_sz,
+			ELF_CORE_HEADER_ALIGN, 0, -1, 0,
+			&image->arch.elf_load_addr);
+	if (ret) {
+		vfree((void *)image->arch.elf_headers);
+		return ret;
+	}
+	pr_debug("Loaded ELF headers at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+		 image->arch.elf_load_addr, elf_sz, elf_sz);
+
+	return ret;
+}
+
+#endif /* CONFIG_X86_64 */
diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c
new file mode 100644
index 000000000000..9642b9b33655
--- /dev/null
+++ b/arch/x86/kernel/kexec-bzimage64.c
@@ -0,0 +1,553 @@
+/*
+ * Kexec bzImage loader
+ *
+ * Copyright (C) 2014 Red Hat Inc.
+ * Authors:
+ *      Vivek Goyal <vgoyal@redhat.com>
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2.  See the file COPYING for more details.
+ */
+
+#define pr_fmt(fmt)	"kexec-bzImage64: " fmt
+
+#include <linux/string.h>
+#include <linux/printk.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/kexec.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/efi.h>
+#include <linux/verify_pefile.h>
+#include <keys/system_keyring.h>
+
+#include <asm/bootparam.h>
+#include <asm/setup.h>
+#include <asm/crash.h>
+#include <asm/efi.h>
+
+#define MAX_ELFCOREHDR_STR_LEN	30	/* elfcorehdr=0x<64bit-value> */
+
+/*
+ * Defines lowest physical address for various segments. Not sure where
+ * exactly these limits came from. Current bzimage64 loader in kexec-tools
+ * uses these so I am retaining it. It can be changed over time as we gain
+ * more insight.
+ */
+#define MIN_PURGATORY_ADDR	0x3000
+#define MIN_BOOTPARAM_ADDR	0x3000
+#define MIN_KERNEL_LOAD_ADDR	0x100000
+#define MIN_INITRD_LOAD_ADDR	0x1000000
+
+/*
+ * This is a place holder for all boot loader specific data structure which
+ * gets allocated in one call but gets freed much later during cleanup
+ * time. Right now there is only one field but it can grow as need be.
+ */
+struct bzimage64_data {
+	/*
+	 * Temporary buffer to hold bootparams buffer. This should be
+	 * freed once the bootparam segment has been loaded.
+	 */
+	void *bootparams_buf;
+};
+
+static int setup_initrd(struct boot_params *params,
+		unsigned long initrd_load_addr, unsigned long initrd_len)
+{
+	params->hdr.ramdisk_image = initrd_load_addr & 0xffffffffUL;
+	params->hdr.ramdisk_size = initrd_len & 0xffffffffUL;
+
+	params->ext_ramdisk_image = initrd_load_addr >> 32;
+	params->ext_ramdisk_size = initrd_len >> 32;
+
+	return 0;
+}
+
+static int setup_cmdline(struct kimage *image, struct boot_params *params,
+			 unsigned long bootparams_load_addr,
+			 unsigned long cmdline_offset, char *cmdline,
+			 unsigned long cmdline_len)
+{
+	char *cmdline_ptr = ((char *)params) + cmdline_offset;
+	unsigned long cmdline_ptr_phys, len;
+	uint32_t cmdline_low_32, cmdline_ext_32;
+
+	memcpy(cmdline_ptr, cmdline, cmdline_len);
+	if (image->type == KEXEC_TYPE_CRASH) {
+		len = sprintf(cmdline_ptr + cmdline_len - 1,
+			" elfcorehdr=0x%lx", image->arch.elf_load_addr);
+		cmdline_len += len;
+	}
+	cmdline_ptr[cmdline_len - 1] = '\0';
+
+	pr_debug("Final command line is: %s\n", cmdline_ptr);
+	cmdline_ptr_phys = bootparams_load_addr + cmdline_offset;
+	cmdline_low_32 = cmdline_ptr_phys & 0xffffffffUL;
+	cmdline_ext_32 = cmdline_ptr_phys >> 32;
+
+	params->hdr.cmd_line_ptr = cmdline_low_32;
+	if (cmdline_ext_32)
+		params->ext_cmd_line_ptr = cmdline_ext_32;
+
+	return 0;
+}
+
+static int setup_e820_entries(struct boot_params *params)
+{
+	unsigned int nr_e820_entries;
+
+	nr_e820_entries = e820_saved.nr_map;
+
+	/* TODO: Pass entries more than E820MAX in bootparams setup data */
+	if (nr_e820_entries > E820MAX)
+		nr_e820_entries = E820MAX;
+
+	params->e820_entries = nr_e820_entries;
+	memcpy(&params->e820_map, &e820_saved.map,
+	       nr_e820_entries * sizeof(struct e820entry));
+
+	return 0;
+}
+
+#ifdef CONFIG_EFI
+static int setup_efi_info_memmap(struct boot_params *params,
+				  unsigned long params_load_addr,
+				  unsigned int efi_map_offset,
+				  unsigned int efi_map_sz)
+{
+	void *efi_map = (void *)params + efi_map_offset;
+	unsigned long efi_map_phys_addr = params_load_addr + efi_map_offset;
+	struct efi_info *ei = &params->efi_info;
+
+	if (!efi_map_sz)
+		return 0;
+
+	efi_runtime_map_copy(efi_map, efi_map_sz);
+
+	ei->efi_memmap = efi_map_phys_addr & 0xffffffff;
+	ei->efi_memmap_hi = efi_map_phys_addr >> 32;
+	ei->efi_memmap_size = efi_map_sz;
+
+	return 0;
+}
+
+static int
+prepare_add_efi_setup_data(struct boot_params *params,
+		       unsigned long params_load_addr,
+		       unsigned int efi_setup_data_offset)
+{
+	unsigned long setup_data_phys;
+	struct setup_data *sd = (void *)params + efi_setup_data_offset;
+	struct efi_setup_data *esd = (void *)sd + sizeof(struct setup_data);
+
+	esd->fw_vendor = efi.fw_vendor;
+	esd->runtime = efi.runtime;
+	esd->tables = efi.config_table;
+	esd->smbios = efi.smbios;
+
+	sd->type = SETUP_EFI;
+	sd->len = sizeof(struct efi_setup_data);
+
+	/* Add setup data */
+	setup_data_phys = params_load_addr + efi_setup_data_offset;
+	sd->next = params->hdr.setup_data;
+	params->hdr.setup_data = setup_data_phys;
+
+	return 0;
+}
+
+static int
+setup_efi_state(struct boot_params *params, unsigned long params_load_addr,
+		unsigned int efi_map_offset, unsigned int efi_map_sz,
+		unsigned int efi_setup_data_offset)
+{
+	struct efi_info *current_ei = &boot_params.efi_info;
+	struct efi_info *ei = &params->efi_info;
+
+	if (!current_ei->efi_memmap_size)
+		return 0;
+
+	/*
+	 * If 1:1 mapping is not enabled, second kernel can not setup EFI
+	 * and use EFI run time services. User space will have to pass
+	 * acpi_rsdp=<addr> on kernel command line to make second kernel boot
+	 * without efi.
+	 */
+	if (efi_enabled(EFI_OLD_MEMMAP))
+		return 0;
+
+	ei->efi_loader_signature = current_ei->efi_loader_signature;
+	ei->efi_systab = current_ei->efi_systab;
+	ei->efi_systab_hi = current_ei->efi_systab_hi;
+
+	ei->efi_memdesc_version = current_ei->efi_memdesc_version;
+	ei->efi_memdesc_size = efi_get_runtime_map_desc_size();
+
+	setup_efi_info_memmap(params, params_load_addr, efi_map_offset,
+			      efi_map_sz);
+	prepare_add_efi_setup_data(params, params_load_addr,
+				   efi_setup_data_offset);
+	return 0;
+}
+#endif /* CONFIG_EFI */
+
+static int
+setup_boot_parameters(struct kimage *image, struct boot_params *params,
+		      unsigned long params_load_addr,
+		      unsigned int efi_map_offset, unsigned int efi_map_sz,
+		      unsigned int efi_setup_data_offset)
+{
+	unsigned int nr_e820_entries;
+	unsigned long long mem_k, start, end;
+	int i, ret = 0;
+
+	/* Get subarch from existing bootparams */
+	params->hdr.hardware_subarch = boot_params.hdr.hardware_subarch;
+
+	/* Copying screen_info will do? */
+	memcpy(&params->screen_info, &boot_params.screen_info,
+				sizeof(struct screen_info));
+
+	/* Fill in memsize later */
+	params->screen_info.ext_mem_k = 0;
+	params->alt_mem_k = 0;
+
+	/* Default APM info */
+	memset(&params->apm_bios_info, 0, sizeof(params->apm_bios_info));
+
+	/* Default drive info */
+	memset(&params->hd0_info, 0, sizeof(params->hd0_info));
+	memset(&params->hd1_info, 0, sizeof(params->hd1_info));
+
+	/* Default sysdesc table */
+	params->sys_desc_table.length = 0;
+
+	if (image->type == KEXEC_TYPE_CRASH) {
+		ret = crash_setup_memmap_entries(image, params);
+		if (ret)
+			return ret;
+	} else
+		setup_e820_entries(params);
+
+	nr_e820_entries = params->e820_entries;
+
+	for (i = 0; i < nr_e820_entries; i++) {
+		if (params->e820_map[i].type != E820_RAM)
+			continue;
+		start = params->e820_map[i].addr;
+		end = params->e820_map[i].addr + params->e820_map[i].size - 1;
+
+		if ((start <= 0x100000) && end > 0x100000) {
+			mem_k = (end >> 10) - (0x100000 >> 10);
+			params->screen_info.ext_mem_k = mem_k;
+			params->alt_mem_k = mem_k;
+			if (mem_k > 0xfc00)
+				params->screen_info.ext_mem_k = 0xfc00; /* 64M*/
+			if (mem_k > 0xffffffff)
+				params->alt_mem_k = 0xffffffff;
+		}
+	}
+
+#ifdef CONFIG_EFI
+	/* Setup EFI state */
+	setup_efi_state(params, params_load_addr, efi_map_offset, efi_map_sz,
+			efi_setup_data_offset);
+#endif
+
+	/* Setup EDD info */
+	memcpy(params->eddbuf, boot_params.eddbuf,
+				EDDMAXNR * sizeof(struct edd_info));
+	params->eddbuf_entries = boot_params.eddbuf_entries;
+
+	memcpy(params->edd_mbr_sig_buffer, boot_params.edd_mbr_sig_buffer,
+	       EDD_MBR_SIG_MAX * sizeof(unsigned int));
+
+	return ret;
+}
+
+int bzImage64_probe(const char *buf, unsigned long len)
+{
+	int ret = -ENOEXEC;
+	struct setup_header *header;
+
+	/* kernel should be atleast two sectors long */
+	if (len < 2 * 512) {
+		pr_err("File is too short to be a bzImage\n");
+		return ret;
+	}
+
+	header = (struct setup_header *)(buf + offsetof(struct boot_params, hdr));
+	if (memcmp((char *)&header->header, "HdrS", 4) != 0) {
+		pr_err("Not a bzImage\n");
+		return ret;
+	}
+
+	if (header->boot_flag != 0xAA55) {
+		pr_err("No x86 boot sector present\n");
+		return ret;
+	}
+
+	if (header->version < 0x020C) {
+		pr_err("Must be at least protocol version 2.12\n");
+		return ret;
+	}
+
+	if (!(header->loadflags & LOADED_HIGH)) {
+		pr_err("zImage not a bzImage\n");
+		return ret;
+	}
+
+	if (!(header->xloadflags & XLF_KERNEL_64)) {
+		pr_err("Not a bzImage64. XLF_KERNEL_64 is not set.\n");
+		return ret;
+	}
+
+	if (!(header->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G)) {
+		pr_err("XLF_CAN_BE_LOADED_ABOVE_4G is not set.\n");
+		return ret;
+	}
+
+	/*
+	 * Can't handle 32bit EFI as it does not allow loading kernel
+	 * above 4G. This should be handled by 32bit bzImage loader
+	 */
+	if (efi_enabled(EFI_RUNTIME_SERVICES) && !efi_enabled(EFI_64BIT)) {
+		pr_debug("EFI is 32 bit. Can't load kernel above 4G.\n");
+		return ret;
+	}
+
+	/* I've got a bzImage */
+	pr_debug("It's a relocatable bzImage64\n");
+	ret = 0;
+
+	return ret;
+}
+
+void *bzImage64_load(struct kimage *image, char *kernel,
+		     unsigned long kernel_len, char *initrd,
+		     unsigned long initrd_len, char *cmdline,
+		     unsigned long cmdline_len)
+{
+
+	struct setup_header *header;
+	int setup_sects, kern16_size, ret = 0;
+	unsigned long setup_header_size, params_cmdline_sz, params_misc_sz;
+	struct boot_params *params;
+	unsigned long bootparam_load_addr, kernel_load_addr, initrd_load_addr;
+	unsigned long purgatory_load_addr;
+	unsigned long kernel_bufsz, kernel_memsz, kernel_align;
+	char *kernel_buf;
+	struct bzimage64_data *ldata;
+	struct kexec_entry64_regs regs64;
+	void *stack;
+	unsigned int setup_hdr_offset = offsetof(struct boot_params, hdr);
+	unsigned int efi_map_offset, efi_map_sz, efi_setup_data_offset;
+
+	header = (struct setup_header *)(kernel + setup_hdr_offset);
+	setup_sects = header->setup_sects;
+	if (setup_sects == 0)
+		setup_sects = 4;
+
+	kern16_size = (setup_sects + 1) * 512;
+	if (kernel_len < kern16_size) {
+		pr_err("bzImage truncated\n");
+		return ERR_PTR(-ENOEXEC);
+	}
+
+	if (cmdline_len > header->cmdline_size) {
+		pr_err("Kernel command line too long\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	/*
+	 * In case of crash dump, we will append elfcorehdr=<addr> to
+	 * command line. Make sure it does not overflow
+	 */
+	if (cmdline_len + MAX_ELFCOREHDR_STR_LEN > header->cmdline_size) {
+		pr_debug("Appending elfcorehdr=<addr> to command line exceeds maximum allowed length\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	/* Allocate and load backup region */
+	if (image->type == KEXEC_TYPE_CRASH) {
+		ret = crash_load_segments(image);
+		if (ret)
+			return ERR_PTR(ret);
+	}
+
+	/*
+	 * Load purgatory. For 64bit entry point, purgatory  code can be
+	 * anywhere.
+	 */
+	ret = kexec_load_purgatory(image, MIN_PURGATORY_ADDR, ULONG_MAX, 1,
+				   &purgatory_load_addr);
+	if (ret) {
+		pr_err("Loading purgatory failed\n");
+		return ERR_PTR(ret);
+	}
+
+	pr_debug("Loaded purgatory at 0x%lx\n", purgatory_load_addr);
+
+
+	/*
+	 * Load Bootparams and cmdline and space for efi stuff.
+	 *
+	 * Allocate memory together for multiple data structures so
+	 * that they all can go in single area/segment and we don't
+	 * have to create separate segment for each. Keeps things
+	 * little bit simple
+	 */
+	efi_map_sz = efi_get_runtime_map_size();
+	efi_map_sz = ALIGN(efi_map_sz, 16);
+	params_cmdline_sz = sizeof(struct boot_params) + cmdline_len +
+				MAX_ELFCOREHDR_STR_LEN;
+	params_cmdline_sz = ALIGN(params_cmdline_sz, 16);
+	params_misc_sz = params_cmdline_sz + efi_map_sz +
+				sizeof(struct setup_data) +
+				sizeof(struct efi_setup_data);
+
+	params = kzalloc(params_misc_sz, GFP_KERNEL);
+	if (!params)
+		return ERR_PTR(-ENOMEM);
+	efi_map_offset = params_cmdline_sz;
+	efi_setup_data_offset = efi_map_offset + efi_map_sz;
+
+	/* Copy setup header onto bootparams. Documentation/x86/boot.txt */
+	setup_header_size = 0x0202 + kernel[0x0201] - setup_hdr_offset;
+
+	/* Is there a limit on setup header size? */
+	memcpy(&params->hdr, (kernel + setup_hdr_offset), setup_header_size);
+
+	ret = kexec_add_buffer(image, (char *)params, params_misc_sz,
+			       params_misc_sz, 16, MIN_BOOTPARAM_ADDR,
+			       ULONG_MAX, 1, &bootparam_load_addr);
+	if (ret)
+		goto out_free_params;
+	pr_debug("Loaded boot_param, command line and misc at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+		 bootparam_load_addr, params_misc_sz, params_misc_sz);
+
+	/* Load kernel */
+	kernel_buf = kernel + kern16_size;
+	kernel_bufsz =  kernel_len - kern16_size;
+	kernel_memsz = PAGE_ALIGN(header->init_size);
+	kernel_align = header->kernel_alignment;
+
+	ret = kexec_add_buffer(image, kernel_buf,
+			       kernel_bufsz, kernel_memsz, kernel_align,
+			       MIN_KERNEL_LOAD_ADDR, ULONG_MAX, 1,
+			       &kernel_load_addr);
+	if (ret)
+		goto out_free_params;
+
+	pr_debug("Loaded 64bit kernel at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+		 kernel_load_addr, kernel_memsz, kernel_memsz);
+
+	/* Load initrd high */
+	if (initrd) {
+		ret = kexec_add_buffer(image, initrd, initrd_len, initrd_len,
+				       PAGE_SIZE, MIN_INITRD_LOAD_ADDR,
+				       ULONG_MAX, 1, &initrd_load_addr);
+		if (ret)
+			goto out_free_params;
+
+		pr_debug("Loaded initrd at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+				initrd_load_addr, initrd_len, initrd_len);
+
+		setup_initrd(params, initrd_load_addr, initrd_len);
+	}
+
+	setup_cmdline(image, params, bootparam_load_addr,
+		      sizeof(struct boot_params), cmdline, cmdline_len);
+
+	/* bootloader info. Do we need a separate ID for kexec kernel loader? */
+	params->hdr.type_of_loader = 0x0D << 4;
+	params->hdr.loadflags = 0;
+
+	/* Setup purgatory regs for entry */
+	ret = kexec_purgatory_get_set_symbol(image, "entry64_regs", &regs64,
+					     sizeof(regs64), 1);
+	if (ret)
+		goto out_free_params;
+
+	regs64.rbx = 0; /* Bootstrap Processor */
+	regs64.rsi = bootparam_load_addr;
+	regs64.rip = kernel_load_addr + 0x200;
+	stack = kexec_purgatory_get_symbol_addr(image, "stack_end");
+	if (IS_ERR(stack)) {
+		pr_err("Could not find address of symbol stack_end\n");
+		ret = -EINVAL;
+		goto out_free_params;
+	}
+
+	regs64.rsp = (unsigned long)stack;
+	ret = kexec_purgatory_get_set_symbol(image, "entry64_regs", &regs64,
+					     sizeof(regs64), 0);
+	if (ret)
+		goto out_free_params;
+
+	ret = setup_boot_parameters(image, params, bootparam_load_addr,
+				    efi_map_offset, efi_map_sz,
+				    efi_setup_data_offset);
+	if (ret)
+		goto out_free_params;
+
+	/* Allocate loader specific data */
+	ldata = kzalloc(sizeof(struct bzimage64_data), GFP_KERNEL);
+	if (!ldata) {
+		ret = -ENOMEM;
+		goto out_free_params;
+	}
+
+	/*
+	 * Store pointer to params so that it could be freed after loading
+	 * params segment has been loaded and contents have been copied
+	 * somewhere else.
+	 */
+	ldata->bootparams_buf = params;
+	return ldata;
+
+out_free_params:
+	kfree(params);
+	return ERR_PTR(ret);
+}
+
+/* This cleanup function is called after various segments have been loaded */
+int bzImage64_cleanup(void *loader_data)
+{
+	struct bzimage64_data *ldata = loader_data;
+
+	if (!ldata)
+		return 0;
+
+	kfree(ldata->bootparams_buf);
+	ldata->bootparams_buf = NULL;
+
+	return 0;
+}
+
+#ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG
+int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len)
+{
+	bool trusted;
+	int ret;
+
+	ret = verify_pefile_signature(kernel, kernel_len,
+				      system_trusted_keyring, &trusted);
+	if (ret < 0)
+		return ret;
+	if (!trusted)
+		return -EKEYREJECTED;
+	return 0;
+}
+#endif
+
+struct kexec_file_ops kexec_bzImage64_ops = {
+	.probe = bzImage64_probe,
+	.load = bzImage64_load,
+	.cleanup = bzImage64_cleanup,
+#ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG
+	.verify_sig = bzImage64_verify_sig,
+#endif
+};
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index 679cef0791cd..8b04018e5d1f 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -6,6 +6,8 @@
  * Version 2.  See the file COPYING for more details.
  */
 
+#define pr_fmt(fmt)	"kexec: " fmt
+
 #include <linux/mm.h>
 #include <linux/kexec.h>
 #include <linux/string.h>
@@ -21,6 +23,11 @@
 #include <asm/tlbflush.h>
 #include <asm/mmu_context.h>
 #include <asm/debugreg.h>
+#include <asm/kexec-bzimage64.h>
+
+static struct kexec_file_ops *kexec_file_loaders[] = {
+		&kexec_bzImage64_ops,
+};
 
 static void free_transition_pgtable(struct kimage *image)
 {
@@ -171,6 +178,38 @@ static void load_segments(void)
 		);
 }
 
+/* Update purgatory as needed after various image segments have been prepared */
+static int arch_update_purgatory(struct kimage *image)
+{
+	int ret = 0;
+
+	if (!image->file_mode)
+		return 0;
+
+	/* Setup copying of backup region */
+	if (image->type == KEXEC_TYPE_CRASH) {
+		ret = kexec_purgatory_get_set_symbol(image, "backup_dest",
+				&image->arch.backup_load_addr,
+				sizeof(image->arch.backup_load_addr), 0);
+		if (ret)
+			return ret;
+
+		ret = kexec_purgatory_get_set_symbol(image, "backup_src",
+				&image->arch.backup_src_start,
+				sizeof(image->arch.backup_src_start), 0);
+		if (ret)
+			return ret;
+
+		ret = kexec_purgatory_get_set_symbol(image, "backup_sz",
+				&image->arch.backup_src_sz,
+				sizeof(image->arch.backup_src_sz), 0);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+
 int machine_kexec_prepare(struct kimage *image)
 {
 	unsigned long start_pgtable;
@@ -184,6 +223,11 @@ int machine_kexec_prepare(struct kimage *image)
 	if (result)
 		return result;
 
+	/* update purgatory as needed */
+	result = arch_update_purgatory(image);
+	if (result)
+		return result;
+
 	return 0;
 }
 
@@ -283,3 +327,198 @@ void arch_crash_save_vmcoreinfo(void)
 			      (unsigned long)&_text - __START_KERNEL);
 }
 
+/* arch-dependent functionality related to kexec file-based syscall */
+
+int arch_kexec_kernel_image_probe(struct kimage *image, void *buf,
+				  unsigned long buf_len)
+{
+	int i, ret = -ENOEXEC;
+	struct kexec_file_ops *fops;
+
+	for (i = 0; i < ARRAY_SIZE(kexec_file_loaders); i++) {
+		fops = kexec_file_loaders[i];
+		if (!fops || !fops->probe)
+			continue;
+
+		ret = fops->probe(buf, buf_len);
+		if (!ret) {
+			image->fops = fops;
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
+void *arch_kexec_kernel_image_load(struct kimage *image)
+{
+	vfree(image->arch.elf_headers);
+	image->arch.elf_headers = NULL;
+
+	if (!image->fops || !image->fops->load)
+		return ERR_PTR(-ENOEXEC);
+
+	return image->fops->load(image, image->kernel_buf,
+				 image->kernel_buf_len, image->initrd_buf,
+				 image->initrd_buf_len, image->cmdline_buf,
+				 image->cmdline_buf_len);
+}
+
+int arch_kimage_file_post_load_cleanup(struct kimage *image)
+{
+	if (!image->fops || !image->fops->cleanup)
+		return 0;
+
+	return image->fops->cleanup(image->image_loader_data);
+}
+
+int arch_kexec_kernel_verify_sig(struct kimage *image, void *kernel,
+				 unsigned long kernel_len)
+{
+	if (!image->fops || !image->fops->verify_sig) {
+		pr_debug("kernel loader does not support signature verification.");
+		return -EKEYREJECTED;
+	}
+
+	return image->fops->verify_sig(kernel, kernel_len);
+}
+
+/*
+ * Apply purgatory relocations.
+ *
+ * ehdr: Pointer to elf headers
+ * sechdrs: Pointer to section headers.
+ * relsec: section index of SHT_RELA section.
+ *
+ * TODO: Some of the code belongs to generic code. Move that in kexec.c.
+ */
+int arch_kexec_apply_relocations_add(const Elf64_Ehdr *ehdr,
+				     Elf64_Shdr *sechdrs, unsigned int relsec)
+{
+	unsigned int i;
+	Elf64_Rela *rel;
+	Elf64_Sym *sym;
+	void *location;
+	Elf64_Shdr *section, *symtabsec;
+	unsigned long address, sec_base, value;
+	const char *strtab, *name, *shstrtab;
+
+	/*
+	 * ->sh_offset has been modified to keep the pointer to section
+	 * contents in memory
+	 */
+	rel = (void *)sechdrs[relsec].sh_offset;
+
+	/* Section to which relocations apply */
+	section = &sechdrs[sechdrs[relsec].sh_info];
+
+	pr_debug("Applying relocate section %u to %u\n", relsec,
+		 sechdrs[relsec].sh_info);
+
+	/* Associated symbol table */
+	symtabsec = &sechdrs[sechdrs[relsec].sh_link];
+
+	/* String table */
+	if (symtabsec->sh_link >= ehdr->e_shnum) {
+		/* Invalid strtab section number */
+		pr_err("Invalid string table section index %d\n",
+		       symtabsec->sh_link);
+		return -ENOEXEC;
+	}
+
+	strtab = (char *)sechdrs[symtabsec->sh_link].sh_offset;
+
+	/* section header string table */
+	shstrtab = (char *)sechdrs[ehdr->e_shstrndx].sh_offset;
+
+	for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+
+		/*
+		 * rel[i].r_offset contains byte offset from beginning
+		 * of section to the storage unit affected.
+		 *
+		 * This is location to update (->sh_offset). This is temporary
+		 * buffer where section is currently loaded. This will finally
+		 * be loaded to a different address later, pointed to by
+		 * ->sh_addr. kexec takes care of moving it
+		 *  (kexec_load_segment()).
+		 */
+		location = (void *)(section->sh_offset + rel[i].r_offset);
+
+		/* Final address of the location */
+		address = section->sh_addr + rel[i].r_offset;
+
+		/*
+		 * rel[i].r_info contains information about symbol table index
+		 * w.r.t which relocation must be made and type of relocation
+		 * to apply. ELF64_R_SYM() and ELF64_R_TYPE() macros get
+		 * these respectively.
+		 */
+		sym = (Elf64_Sym *)symtabsec->sh_offset +
+				ELF64_R_SYM(rel[i].r_info);
+
+		if (sym->st_name)
+			name = strtab + sym->st_name;
+		else
+			name = shstrtab + sechdrs[sym->st_shndx].sh_name;
+
+		pr_debug("Symbol: %s info: %02x shndx: %02x value=%llx size: %llx\n",
+			 name, sym->st_info, sym->st_shndx, sym->st_value,
+			 sym->st_size);
+
+		if (sym->st_shndx == SHN_UNDEF) {
+			pr_err("Undefined symbol: %s\n", name);
+			return -ENOEXEC;
+		}
+
+		if (sym->st_shndx == SHN_COMMON) {
+			pr_err("symbol '%s' in common section\n", name);
+			return -ENOEXEC;
+		}
+
+		if (sym->st_shndx == SHN_ABS)
+			sec_base = 0;
+		else if (sym->st_shndx >= ehdr->e_shnum) {
+			pr_err("Invalid section %d for symbol %s\n",
+			       sym->st_shndx, name);
+			return -ENOEXEC;
+		} else
+			sec_base = sechdrs[sym->st_shndx].sh_addr;
+
+		value = sym->st_value;
+		value += sec_base;
+		value += rel[i].r_addend;
+
+		switch (ELF64_R_TYPE(rel[i].r_info)) {
+		case R_X86_64_NONE:
+			break;
+		case R_X86_64_64:
+			*(u64 *)location = value;
+			break;
+		case R_X86_64_32:
+			*(u32 *)location = value;
+			if (value != *(u32 *)location)
+				goto overflow;
+			break;
+		case R_X86_64_32S:
+			*(s32 *)location = value;
+			if ((s64)value != *(s32 *)location)
+				goto overflow;
+			break;
+		case R_X86_64_PC32:
+			value -= (u64)address;
+			*(u32 *)location = value;
+			break;
+		default:
+			pr_err("Unknown rela relocation: %llu\n",
+			       ELF64_R_TYPE(rel[i].r_info));
+			return -ENOEXEC;
+		}
+	}
+	return 0;
+
+overflow:
+	pr_err("Overflow in relocation type %d value 0x%lx\n",
+	       (int)ELF64_R_TYPE(rel[i].r_info), value);
+	return -ENOEXEC;
+}
diff --git a/arch/x86/kvm/mmu_audit.c b/arch/x86/kvm/mmu_audit.c
index 1185fe7a7f47..9ade5cfb5a4c 100644
--- a/arch/x86/kvm/mmu_audit.c
+++ b/arch/x86/kvm/mmu_audit.c
@@ -273,7 +273,7 @@ static int mmu_audit_set(const char *val, const struct kernel_param *kp)
 	int ret;
 	unsigned long enable;
 
-	ret = strict_strtoul(val, 10, &enable);
+	ret = kstrtoul(val, 10, &enable);
 	if (ret < 0)
 		return -EINVAL;
 
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index ed161c6e278b..3968d67d366b 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -1479,7 +1479,7 @@ static ssize_t ptc_proc_write(struct file *file, const char __user *user,
 		return count;
 	}
 
-	if (strict_strtol(optstr, 10, &input_arg) < 0) {
+	if (kstrtol(optstr, 10, &input_arg) < 0) {
 		printk(KERN_DEBUG "%s is invalid\n", optstr);
 		return -EINVAL;
 	}
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile
new file mode 100644
index 000000000000..7fde9ee438a4
--- /dev/null
+++ b/arch/x86/purgatory/Makefile
@@ -0,0 +1,30 @@
+purgatory-y := purgatory.o stack.o setup-x86_$(BITS).o sha256.o entry64.o string.o
+
+targets += $(purgatory-y)
+PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
+
+LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib
+targets += purgatory.ro
+
+# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
+# in turn leaves some undefined symbols like __fentry__ in purgatory and not
+# sure how to relocate those. Like kexec-tools, use custom flags.
+
+KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -MD -Os -mcmodel=large
+
+$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
+		$(call if_changed,ld)
+
+targets += kexec-purgatory.c
+
+quiet_cmd_bin2c = BIN2C   $@
+      cmd_bin2c = cat $(obj)/purgatory.ro | $(objtree)/scripts/basic/bin2c kexec_purgatory > $(obj)/kexec-purgatory.c
+
+$(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE
+	$(call if_changed,bin2c)
+
+
+# No loaders for 32bits yet.
+ifeq ($(CONFIG_X86_64),y)
+ obj-$(CONFIG_KEXEC)		+= kexec-purgatory.o
+endif
diff --git a/arch/x86/purgatory/entry64.S b/arch/x86/purgatory/entry64.S
new file mode 100644
index 000000000000..d1a4291d3568
--- /dev/null
+++ b/arch/x86/purgatory/entry64.S
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2003,2004  Eric Biederman (ebiederm@xmission.com)
+ * Copyright (C) 2014  Red Hat Inc.
+
+ * Author(s): Vivek Goyal <vgoyal@redhat.com>
+ *
+ * This code has been taken from kexec-tools.
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2.  See the file COPYING for more details.
+ */
+
+	.text
+	.balign 16
+	.code64
+	.globl entry64, entry64_regs
+
+
+entry64:
+	/* Setup a gdt that should be preserved */
+	lgdt gdt(%rip)
+
+	/* load the data segments */
+	movl    $0x18, %eax     /* data segment */
+	movl    %eax, %ds
+	movl    %eax, %es
+	movl    %eax, %ss
+	movl    %eax, %fs
+	movl    %eax, %gs
+
+	/* Setup new stack */
+	leaq    stack_init(%rip), %rsp
+	pushq   $0x10 /* CS */
+	leaq    new_cs_exit(%rip), %rax
+	pushq   %rax
+	lretq
+new_cs_exit:
+
+	/* Load the registers */
+	movq	rax(%rip), %rax
+	movq	rbx(%rip), %rbx
+	movq	rcx(%rip), %rcx
+	movq	rdx(%rip), %rdx
+	movq	rsi(%rip), %rsi
+	movq	rdi(%rip), %rdi
+	movq    rsp(%rip), %rsp
+	movq	rbp(%rip), %rbp
+	movq	r8(%rip), %r8
+	movq	r9(%rip), %r9
+	movq	r10(%rip), %r10
+	movq	r11(%rip), %r11
+	movq	r12(%rip), %r12
+	movq	r13(%rip), %r13
+	movq	r14(%rip), %r14
+	movq	r15(%rip), %r15
+
+	/* Jump to the new code... */
+	jmpq	*rip(%rip)
+
+	.section ".rodata"
+	.balign 4
+entry64_regs:
+rax:	.quad 0x0
+rcx:	.quad 0x0
+rdx:	.quad 0x0
+rbx:	.quad 0x0
+rsp:	.quad 0x0
+rbp:	.quad 0x0
+rsi:	.quad 0x0
+rdi:	.quad 0x0
+r8:	.quad 0x0
+r9:	.quad 0x0
+r10:	.quad 0x0
+r11:	.quad 0x0
+r12:	.quad 0x0
+r13:	.quad 0x0
+r14:	.quad 0x0
+r15:	.quad 0x0
+rip:	.quad 0x0
+	.size entry64_regs, . - entry64_regs
+
+	/* GDT */
+	.section ".rodata"
+	.balign 16
+gdt:
+	/* 0x00 unusable segment
+	 * 0x08 unused
+	 * so use them as gdt ptr
+	 */
+	.word gdt_end - gdt - 1
+	.quad gdt
+	.word 0, 0, 0
+
+	/* 0x10 4GB flat code segment */
+	.word 0xFFFF, 0x0000, 0x9A00, 0x00AF
+
+	/* 0x18 4GB flat data segment */
+	.word 0xFFFF, 0x0000, 0x9200, 0x00CF
+gdt_end:
+stack:	.quad   0, 0
+stack_init:
diff --git a/arch/x86/purgatory/purgatory.c b/arch/x86/purgatory/purgatory.c
new file mode 100644
index 000000000000..25e068ba3382
--- /dev/null
+++ b/arch/x86/purgatory/purgatory.c
@@ -0,0 +1,72 @@
+/*
+ * purgatory: Runs between two kernels
+ *
+ * Copyright (C) 2014 Red Hat Inc.
+ *
+ * Author:
+ *       Vivek Goyal <vgoyal@redhat.com>
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2.  See the file COPYING for more details.
+ */
+
+#include "sha256.h"
+#include "../boot/string.h"
+
+struct sha_region {
+	unsigned long start;
+	unsigned long len;
+};
+
+unsigned long backup_dest = 0;
+unsigned long backup_src = 0;
+unsigned long backup_sz = 0;
+
+u8 sha256_digest[SHA256_DIGEST_SIZE] = { 0 };
+
+struct sha_region sha_regions[16] = {};
+
+/*
+ * On x86, second kernel requries first 640K of memory to boot. Copy
+ * first 640K to a backup region in reserved memory range so that second
+ * kernel can use first 640K.
+ */
+static int copy_backup_region(void)
+{
+	if (backup_dest)
+		memcpy((void *)backup_dest, (void *)backup_src, backup_sz);
+
+	return 0;
+}
+
+int verify_sha256_digest(void)
+{
+	struct sha_region *ptr, *end;
+	u8 digest[SHA256_DIGEST_SIZE];
+	struct sha256_state sctx;
+
+	sha256_init(&sctx);
+	end = &sha_regions[sizeof(sha_regions)/sizeof(sha_regions[0])];
+	for (ptr = sha_regions; ptr < end; ptr++)
+		sha256_update(&sctx, (uint8_t *)(ptr->start), ptr->len);
+
+	sha256_final(&sctx, digest);
+
+	if (memcmp(digest, sha256_digest, sizeof(digest)))
+		return 1;
+
+	return 0;
+}
+
+void purgatory(void)
+{
+	int ret;
+
+	ret = verify_sha256_digest();
+	if (ret) {
+		/* loop forever */
+		for (;;)
+			;
+	}
+	copy_backup_region();
+}
diff --git a/arch/x86/purgatory/setup-x86_64.S b/arch/x86/purgatory/setup-x86_64.S
new file mode 100644
index 000000000000..fe3c91ba1bd0
--- /dev/null
+++ b/arch/x86/purgatory/setup-x86_64.S
@@ -0,0 +1,58 @@
+/*
+ * purgatory:  setup code
+ *
+ * Copyright (C) 2003,2004  Eric Biederman (ebiederm@xmission.com)
+ * Copyright (C) 2014 Red Hat Inc.
+ *
+ * This code has been taken from kexec-tools.
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2.  See the file COPYING for more details.
+ */
+
+	.text
+	.globl purgatory_start
+	.balign 16
+purgatory_start:
+	.code64
+
+	/* Load a gdt so I know what the segment registers are */
+	lgdt	gdt(%rip)
+
+	/* load the data segments */
+	movl	$0x18, %eax	/* data segment */
+	movl	%eax, %ds
+	movl	%eax, %es
+	movl	%eax, %ss
+	movl	%eax, %fs
+	movl	%eax, %gs
+
+	/* Setup a stack */
+	leaq	lstack_end(%rip), %rsp
+
+	/* Call the C code */
+	call purgatory
+	jmp	entry64
+
+	.section ".rodata"
+	.balign 16
+gdt:	/* 0x00 unusable segment
+	 * 0x08 unused
+	 * so use them as the gdt ptr
+	 */
+	.word	gdt_end - gdt - 1
+	.quad	gdt
+	.word	0, 0, 0
+
+	/* 0x10 4GB flat code segment */
+	.word	0xFFFF, 0x0000, 0x9A00, 0x00AF
+
+	/* 0x18 4GB flat data segment */
+	.word	0xFFFF, 0x0000, 0x9200, 0x00CF
+gdt_end:
+
+	.bss
+	.balign 4096
+lstack:
+	.skip 4096
+lstack_end:
diff --git a/arch/x86/purgatory/sha256.c b/arch/x86/purgatory/sha256.c
new file mode 100644
index 000000000000..548ca675a14a
--- /dev/null
+++ b/arch/x86/purgatory/sha256.c
@@ -0,0 +1,283 @@
+/*
+ * SHA-256, as specified in
+ * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
+ *
+ * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
+ *
+ * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
+ * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
+ * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ * Copyright (c) 2014 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ */
+
+#include <linux/bitops.h>
+#include <asm/byteorder.h>
+#include "sha256.h"
+#include "../boot/string.h"
+
+static inline u32 Ch(u32 x, u32 y, u32 z)
+{
+	return z ^ (x & (y ^ z));
+}
+
+static inline u32 Maj(u32 x, u32 y, u32 z)
+{
+	return (x & y) | (z & (x | y));
+}
+
+#define e0(x)       (ror32(x, 2) ^ ror32(x, 13) ^ ror32(x, 22))
+#define e1(x)       (ror32(x, 6) ^ ror32(x, 11) ^ ror32(x, 25))
+#define s0(x)       (ror32(x, 7) ^ ror32(x, 18) ^ (x >> 3))
+#define s1(x)       (ror32(x, 17) ^ ror32(x, 19) ^ (x >> 10))
+
+static inline void LOAD_OP(int I, u32 *W, const u8 *input)
+{
+	W[I] = __be32_to_cpu(((__be32 *)(input))[I]);
+}
+
+static inline void BLEND_OP(int I, u32 *W)
+{
+	W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
+}
+
+static void sha256_transform(u32 *state, const u8 *input)
+{
+	u32 a, b, c, d, e, f, g, h, t1, t2;
+	u32 W[64];
+	int i;
+
+	/* load the input */
+	for (i = 0; i < 16; i++)
+		LOAD_OP(i, W, input);
+
+	/* now blend */
+	for (i = 16; i < 64; i++)
+		BLEND_OP(i, W);
+
+	/* load the state into our registers */
+	a = state[0];  b = state[1];  c = state[2];  d = state[3];
+	e = state[4];  f = state[5];  g = state[6];  h = state[7];
+
+	/* now iterate */
+	t1 = h + e1(e) + Ch(e, f, g) + 0x428a2f98 + W[0];
+	t2 = e0(a) + Maj(a, b, c);    d += t1;    h = t1 + t2;
+	t1 = g + e1(d) + Ch(d, e, f) + 0x71374491 + W[1];
+	t2 = e0(h) + Maj(h, a, b);    c += t1;    g = t1 + t2;
+	t1 = f + e1(c) + Ch(c, d, e) + 0xb5c0fbcf + W[2];
+	t2 = e0(g) + Maj(g, h, a);    b += t1;    f = t1 + t2;
+	t1 = e + e1(b) + Ch(b, c, d) + 0xe9b5dba5 + W[3];
+	t2 = e0(f) + Maj(f, g, h);    a += t1;    e = t1 + t2;
+	t1 = d + e1(a) + Ch(a, b, c) + 0x3956c25b + W[4];
+	t2 = e0(e) + Maj(e, f, g);    h += t1;    d = t1 + t2;
+	t1 = c + e1(h) + Ch(h, a, b) + 0x59f111f1 + W[5];
+	t2 = e0(d) + Maj(d, e, f);    g += t1;    c = t1 + t2;
+	t1 = b + e1(g) + Ch(g, h, a) + 0x923f82a4 + W[6];
+	t2 = e0(c) + Maj(c, d, e);    f += t1;    b = t1 + t2;
+	t1 = a + e1(f) + Ch(f, g, h) + 0xab1c5ed5 + W[7];
+	t2 = e0(b) + Maj(b, c, d);    e += t1;    a = t1 + t2;
+
+	t1 = h + e1(e) + Ch(e, f, g) + 0xd807aa98 + W[8];
+	t2 = e0(a) + Maj(a, b, c);    d += t1;    h = t1 + t2;
+	t1 = g + e1(d) + Ch(d, e, f) + 0x12835b01 + W[9];
+	t2 = e0(h) + Maj(h, a, b);    c += t1;    g = t1 + t2;
+	t1 = f + e1(c) + Ch(c, d, e) + 0x243185be + W[10];
+	t2 = e0(g) + Maj(g, h, a);    b += t1;    f = t1 + t2;
+	t1 = e + e1(b) + Ch(b, c, d) + 0x550c7dc3 + W[11];
+	t2 = e0(f) + Maj(f, g, h);    a += t1;    e = t1 + t2;
+	t1 = d + e1(a) + Ch(a, b, c) + 0x72be5d74 + W[12];
+	t2 = e0(e) + Maj(e, f, g);    h += t1;    d = t1 + t2;
+	t1 = c + e1(h) + Ch(h, a, b) + 0x80deb1fe + W[13];
+	t2 = e0(d) + Maj(d, e, f);    g += t1;    c = t1 + t2;
+	t1 = b + e1(g) + Ch(g, h, a) + 0x9bdc06a7 + W[14];
+	t2 = e0(c) + Maj(c, d, e);    f += t1;    b = t1 + t2;
+	t1 = a + e1(f) + Ch(f, g, h) + 0xc19bf174 + W[15];
+	t2 = e0(b) + Maj(b, c, d);    e += t1;    a = t1+t2;
+
+	t1 = h + e1(e) + Ch(e, f, g) + 0xe49b69c1 + W[16];
+	t2 = e0(a) + Maj(a, b, c);    d += t1;    h = t1+t2;
+	t1 = g + e1(d) + Ch(d, e, f) + 0xefbe4786 + W[17];
+	t2 = e0(h) + Maj(h, a, b);    c += t1;    g = t1+t2;
+	t1 = f + e1(c) + Ch(c, d, e) + 0x0fc19dc6 + W[18];
+	t2 = e0(g) + Maj(g, h, a);    b += t1;    f = t1+t2;
+	t1 = e + e1(b) + Ch(b, c, d) + 0x240ca1cc + W[19];
+	t2 = e0(f) + Maj(f, g, h);    a += t1;    e = t1+t2;
+	t1 = d + e1(a) + Ch(a, b, c) + 0x2de92c6f + W[20];
+	t2 = e0(e) + Maj(e, f, g);    h += t1;    d = t1+t2;
+	t1 = c + e1(h) + Ch(h, a, b) + 0x4a7484aa + W[21];
+	t2 = e0(d) + Maj(d, e, f);    g += t1;    c = t1+t2;
+	t1 = b + e1(g) + Ch(g, h, a) + 0x5cb0a9dc + W[22];
+	t2 = e0(c) + Maj(c, d, e);    f += t1;    b = t1+t2;
+	t1 = a + e1(f) + Ch(f, g, h) + 0x76f988da + W[23];
+	t2 = e0(b) + Maj(b, c, d);    e += t1;    a = t1+t2;
+
+	t1 = h + e1(e) + Ch(e, f, g) + 0x983e5152 + W[24];
+	t2 = e0(a) + Maj(a, b, c);    d += t1;    h = t1+t2;
+	t1 = g + e1(d) + Ch(d, e, f) + 0xa831c66d + W[25];
+	t2 = e0(h) + Maj(h, a, b);    c += t1;    g = t1+t2;
+	t1 = f + e1(c) + Ch(c, d, e) + 0xb00327c8 + W[26];
+	t2 = e0(g) + Maj(g, h, a);    b += t1;    f = t1+t2;
+	t1 = e + e1(b) + Ch(b, c, d) + 0xbf597fc7 + W[27];
+	t2 = e0(f) + Maj(f, g, h);    a += t1;    e = t1+t2;
+	t1 = d + e1(a) + Ch(a, b, c) + 0xc6e00bf3 + W[28];
+	t2 = e0(e) + Maj(e, f, g);    h += t1;    d = t1+t2;
+	t1 = c + e1(h) + Ch(h, a, b) + 0xd5a79147 + W[29];
+	t2 = e0(d) + Maj(d, e, f);    g += t1;    c = t1+t2;
+	t1 = b + e1(g) + Ch(g, h, a) + 0x06ca6351 + W[30];
+	t2 = e0(c) + Maj(c, d, e);    f += t1;    b = t1+t2;
+	t1 = a + e1(f) + Ch(f, g, h) + 0x14292967 + W[31];
+	t2 = e0(b) + Maj(b, c, d);    e += t1;    a = t1+t2;
+
+	t1 = h + e1(e) + Ch(e, f, g) + 0x27b70a85 + W[32];
+	t2 = e0(a) + Maj(a, b, c);    d += t1;    h = t1+t2;
+	t1 = g + e1(d) + Ch(d, e, f) + 0x2e1b2138 + W[33];
+	t2 = e0(h) + Maj(h, a, b);    c += t1;    g = t1+t2;
+	t1 = f + e1(c) + Ch(c, d, e) + 0x4d2c6dfc + W[34];
+	t2 = e0(g) + Maj(g, h, a);    b += t1;    f = t1+t2;
+	t1 = e + e1(b) + Ch(b, c, d) + 0x53380d13 + W[35];
+	t2 = e0(f) + Maj(f, g, h);    a += t1;    e = t1+t2;
+	t1 = d + e1(a) + Ch(a, b, c) + 0x650a7354 + W[36];
+	t2 = e0(e) + Maj(e, f, g);    h += t1;    d = t1+t2;
+	t1 = c + e1(h) + Ch(h, a, b) + 0x766a0abb + W[37];
+	t2 = e0(d) + Maj(d, e, f);    g += t1;    c = t1+t2;
+	t1 = b + e1(g) + Ch(g, h, a) + 0x81c2c92e + W[38];
+	t2 = e0(c) + Maj(c, d, e);    f += t1;    b = t1+t2;
+	t1 = a + e1(f) + Ch(f, g, h) + 0x92722c85 + W[39];
+	t2 = e0(b) + Maj(b, c, d);    e += t1;    a = t1+t2;
+
+	t1 = h + e1(e) + Ch(e, f, g) + 0xa2bfe8a1 + W[40];
+	t2 = e0(a) + Maj(a, b, c);    d += t1;    h = t1+t2;
+	t1 = g + e1(d) + Ch(d, e, f) + 0xa81a664b + W[41];
+	t2 = e0(h) + Maj(h, a, b);    c += t1;    g = t1+t2;
+	t1 = f + e1(c) + Ch(c, d, e) + 0xc24b8b70 + W[42];
+	t2 = e0(g) + Maj(g, h, a);    b += t1;    f = t1+t2;
+	t1 = e + e1(b) + Ch(b, c, d) + 0xc76c51a3 + W[43];
+	t2 = e0(f) + Maj(f, g, h);    a += t1;    e = t1+t2;
+	t1 = d + e1(a) + Ch(a, b, c) + 0xd192e819 + W[44];
+	t2 = e0(e) + Maj(e, f, g);    h += t1;    d = t1+t2;
+	t1 = c + e1(h) + Ch(h, a, b) + 0xd6990624 + W[45];
+	t2 = e0(d) + Maj(d, e, f);    g += t1;    c = t1+t2;
+	t1 = b + e1(g) + Ch(g, h, a) + 0xf40e3585 + W[46];
+	t2 = e0(c) + Maj(c, d, e);    f += t1;    b = t1+t2;
+	t1 = a + e1(f) + Ch(f, g, h) + 0x106aa070 + W[47];
+	t2 = e0(b) + Maj(b, c, d);    e += t1;    a = t1+t2;
+
+	t1 = h + e1(e) + Ch(e, f, g) + 0x19a4c116 + W[48];
+	t2 = e0(a) + Maj(a, b, c);    d += t1;    h = t1+t2;
+	t1 = g + e1(d) + Ch(d, e, f) + 0x1e376c08 + W[49];
+	t2 = e0(h) + Maj(h, a, b);    c += t1;    g = t1+t2;
+	t1 = f + e1(c) + Ch(c, d, e) + 0x2748774c + W[50];
+	t2 = e0(g) + Maj(g, h, a);    b += t1;    f = t1+t2;
+	t1 = e + e1(b) + Ch(b, c, d) + 0x34b0bcb5 + W[51];
+	t2 = e0(f) + Maj(f, g, h);    a += t1;    e = t1+t2;
+	t1 = d + e1(a) + Ch(a, b, c) + 0x391c0cb3 + W[52];
+	t2 = e0(e) + Maj(e, f, g);    h += t1;    d = t1+t2;
+	t1 = c + e1(h) + Ch(h, a, b) + 0x4ed8aa4a + W[53];
+	t2 = e0(d) + Maj(d, e, f);    g += t1;    c = t1+t2;
+	t1 = b + e1(g) + Ch(g, h, a) + 0x5b9cca4f + W[54];
+	t2 = e0(c) + Maj(c, d, e);    f += t1;    b = t1+t2;
+	t1 = a + e1(f) + Ch(f, g, h) + 0x682e6ff3 + W[55];
+	t2 = e0(b) + Maj(b, c, d);    e += t1;    a = t1+t2;
+
+	t1 = h + e1(e) + Ch(e, f, g) + 0x748f82ee + W[56];
+	t2 = e0(a) + Maj(a, b, c);    d += t1;    h = t1+t2;
+	t1 = g + e1(d) + Ch(d, e, f) + 0x78a5636f + W[57];
+	t2 = e0(h) + Maj(h, a, b);    c += t1;    g = t1+t2;
+	t1 = f + e1(c) + Ch(c, d, e) + 0x84c87814 + W[58];
+	t2 = e0(g) + Maj(g, h, a);    b += t1;    f = t1+t2;
+	t1 = e + e1(b) + Ch(b, c, d) + 0x8cc70208 + W[59];
+	t2 = e0(f) + Maj(f, g, h);    a += t1;    e = t1+t2;
+	t1 = d + e1(a) + Ch(a, b, c) + 0x90befffa + W[60];
+	t2 = e0(e) + Maj(e, f, g);    h += t1;    d = t1+t2;
+	t1 = c + e1(h) + Ch(h, a, b) + 0xa4506ceb + W[61];
+	t2 = e0(d) + Maj(d, e, f);    g += t1;    c = t1+t2;
+	t1 = b + e1(g) + Ch(g, h, a) + 0xbef9a3f7 + W[62];
+	t2 = e0(c) + Maj(c, d, e);    f += t1;    b = t1+t2;
+	t1 = a + e1(f) + Ch(f, g, h) + 0xc67178f2 + W[63];
+	t2 = e0(b) + Maj(b, c, d);    e += t1;    a = t1+t2;
+
+	state[0] += a; state[1] += b; state[2] += c; state[3] += d;
+	state[4] += e; state[5] += f; state[6] += g; state[7] += h;
+
+	/* clear any sensitive info... */
+	a = b = c = d = e = f = g = h = t1 = t2 = 0;
+	memset(W, 0, 64 * sizeof(u32));
+}
+
+int sha256_init(struct sha256_state *sctx)
+{
+	sctx->state[0] = SHA256_H0;
+	sctx->state[1] = SHA256_H1;
+	sctx->state[2] = SHA256_H2;
+	sctx->state[3] = SHA256_H3;
+	sctx->state[4] = SHA256_H4;
+	sctx->state[5] = SHA256_H5;
+	sctx->state[6] = SHA256_H6;
+	sctx->state[7] = SHA256_H7;
+	sctx->count = 0;
+
+	return 0;
+}
+
+int sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
+{
+	unsigned int partial, done;
+	const u8 *src;
+
+	partial = sctx->count & 0x3f;
+	sctx->count += len;
+	done = 0;
+	src = data;
+
+	if ((partial + len) > 63) {
+		if (partial) {
+			done = -partial;
+			memcpy(sctx->buf + partial, data, done + 64);
+			src = sctx->buf;
+		}
+
+		do {
+			sha256_transform(sctx->state, src);
+			done += 64;
+			src = data + done;
+		} while (done + 63 < len);
+
+		partial = 0;
+	}
+	memcpy(sctx->buf + partial, src, len - done);
+
+	return 0;
+}
+
+int sha256_final(struct sha256_state *sctx, u8 *out)
+{
+	__be32 *dst = (__be32 *)out;
+	__be64 bits;
+	unsigned int index, pad_len;
+	int i;
+	static const u8 padding[64] = { 0x80, };
+
+	/* Save number of bits */
+	bits = cpu_to_be64(sctx->count << 3);
+
+	/* Pad out to 56 mod 64. */
+	index = sctx->count & 0x3f;
+	pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
+	sha256_update(sctx, padding, pad_len);
+
+	/* Append length (before padding) */
+	sha256_update(sctx, (const u8 *)&bits, sizeof(bits));
+
+	/* Store state in digest */
+	for (i = 0; i < 8; i++)
+		dst[i] = cpu_to_be32(sctx->state[i]);
+
+	/* Zeroize sensitive information. */
+	memset(sctx, 0, sizeof(*sctx));
+
+	return 0;
+}
diff --git a/arch/x86/purgatory/sha256.h b/arch/x86/purgatory/sha256.h
new file mode 100644
index 000000000000..bd15a4127735
--- /dev/null
+++ b/arch/x86/purgatory/sha256.h
@@ -0,0 +1,22 @@
+/*
+ *  Copyright (C) 2014 Red Hat Inc.
+ *
+ *  Author: Vivek Goyal <vgoyal@redhat.com>
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2.  See the file COPYING for more details.
+ */
+
+#ifndef SHA256_H
+#define SHA256_H
+
+
+#include <linux/types.h>
+#include <crypto/sha.h>
+
+extern int sha256_init(struct sha256_state *sctx);
+extern int sha256_update(struct sha256_state *sctx, const u8 *input,
+				unsigned int length);
+extern int sha256_final(struct sha256_state *sctx, u8 *hash);
+
+#endif /* SHA256_H */
diff --git a/arch/x86/purgatory/stack.S b/arch/x86/purgatory/stack.S
new file mode 100644
index 000000000000..3cefba1fefc8
--- /dev/null
+++ b/arch/x86/purgatory/stack.S
@@ -0,0 +1,19 @@
+/*
+ * purgatory:  stack
+ *
+ * Copyright (C) 2014 Red Hat Inc.
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2.  See the file COPYING for more details.
+ */
+
+	/* A stack for the loaded kernel.
+	 * Seperate and in the data section so it can be prepopulated.
+	 */
+	.data
+	.balign 4096
+	.globl stack, stack_end
+
+stack:
+	.skip 4096
+stack_end:
diff --git a/arch/x86/purgatory/string.c b/arch/x86/purgatory/string.c
new file mode 100644
index 000000000000..d886b1fa36f0
--- /dev/null
+++ b/arch/x86/purgatory/string.c
@@ -0,0 +1,13 @@
+/*
+ * Simple string functions.
+ *
+ * Copyright (C) 2014 Red Hat Inc.
+ *
+ * Author:
+ *       Vivek Goyal <vgoyal@redhat.com>
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2.  See the file COPYING for more details.
+ */
+
+#include "../boot/string.c"
diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
index d1b4a119d4a5..028b78168d85 100644
--- a/arch/x86/syscalls/syscall_32.tbl
+++ b/arch/x86/syscalls/syscall_32.tbl
@@ -362,3 +362,4 @@
 353	i386	renameat2		sys_renameat2
 354	i386	seccomp			sys_seccomp
 355	i386	getrandom		sys_getrandom
+356	i386	memfd_create		sys_memfd_create
diff --git a/arch/x86/syscalls/syscall_64.tbl b/arch/x86/syscalls/syscall_64.tbl
index 252c804bb1aa..35dd922727b9 100644
--- a/arch/x86/syscalls/syscall_64.tbl
+++ b/arch/x86/syscalls/syscall_64.tbl
@@ -325,6 +325,8 @@
 316	common	renameat2		sys_renameat2
 317	common	seccomp			sys_seccomp
 318	common	getrandom		sys_getrandom
+319	common	memfd_create		sys_memfd_create
+320	common	kexec_file_load		sys_kexec_file_load
 
 #
 # x32-specific system call numbers start at 512 to avoid cache impact
diff --git a/arch/x86/um/asm/elf.h b/arch/x86/um/asm/elf.h
index 0feee2fd5077..25a1022dd793 100644
--- a/arch/x86/um/asm/elf.h
+++ b/arch/x86/um/asm/elf.h
@@ -216,6 +216,5 @@ extern long elf_aux_hwcap;
 #define ELF_HWCAP (elf_aux_hwcap)
 
 #define SET_PERSONALITY(ex) do ; while(0)
-#define __HAVE_ARCH_GATE_AREA 1
 
 #endif
diff --git a/arch/x86/um/mem_64.c b/arch/x86/um/mem_64.c
index c6492e75797b..f8fecaddcc0d 100644
--- a/arch/x86/um/mem_64.c
+++ b/arch/x86/um/mem_64.c
@@ -9,18 +9,3 @@ const char *arch_vma_name(struct vm_area_struct *vma)
 
 	return NULL;
 }
-
-struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
-{
-	return NULL;
-}
-
-int in_gate_area(struct mm_struct *mm, unsigned long addr)
-{
-	return 0;
-}
-
-int in_gate_area_no_mm(unsigned long addr)
-{
-	return 0;
-}
diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c
index e4f7781ee162..e904c270573b 100644
--- a/arch/x86/vdso/vdso32-setup.c
+++ b/arch/x86/vdso/vdso32-setup.c
@@ -115,23 +115,6 @@ static __init int ia32_binfmt_init(void)
 	return 0;
 }
 __initcall(ia32_binfmt_init);
-#endif
-
-#else  /* CONFIG_X86_32 */
-
-struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
-{
-	return NULL;
-}
-
-int in_gate_area(struct mm_struct *mm, unsigned long addr)
-{
-	return 0;
-}
-
-int in_gate_area_no_mm(unsigned long addr)
-{
-	return 0;
-}
+#endif /* CONFIG_SYSCTL */
 
 #endif	/* CONFIG_X86_64 */
diff --git a/crypto/zlib.c b/crypto/zlib.c
index 06b62e5cdcc7..c9ee681d57fd 100644
--- a/crypto/zlib.c
+++ b/crypto/zlib.c
@@ -168,7 +168,7 @@ static int zlib_compress_update(struct crypto_pcomp *tfm,
 	}
 
 	ret = req->avail_out - stream->avail_out;
-	pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
+	pr_debug("avail_in %lu, avail_out %lu (consumed %lu, produced %u)\n",
 		 stream->avail_in, stream->avail_out,
 		 req->avail_in - stream->avail_in, ret);
 	req->next_in = stream->next_in;
@@ -198,7 +198,7 @@ static int zlib_compress_final(struct crypto_pcomp *tfm,
 	}
 
 	ret = req->avail_out - stream->avail_out;
-	pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
+	pr_debug("avail_in %lu, avail_out %lu (consumed %lu, produced %u)\n",
 		 stream->avail_in, stream->avail_out,
 		 req->avail_in - stream->avail_in, ret);
 	req->next_in = stream->next_in;
@@ -283,7 +283,7 @@ static int zlib_decompress_update(struct crypto_pcomp *tfm,
 	}
 
 	ret = req->avail_out - stream->avail_out;
-	pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
+	pr_debug("avail_in %lu, avail_out %lu (consumed %lu, produced %u)\n",
 		 stream->avail_in, stream->avail_out,
 		 req->avail_in - stream->avail_in, ret);
 	req->next_in = stream->next_in;
@@ -331,7 +331,7 @@ static int zlib_decompress_final(struct crypto_pcomp *tfm,
 	}
 
 	ret = req->avail_out - stream->avail_out;
-	pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
+	pr_debug("avail_in %lu, avail_out %lu (consumed %lu, produced %u)\n",
 		 stream->avail_in, stream->avail_out,
 		 req->avail_in - stream->avail_in, ret);
 	req->next_in = stream->next_in;
diff --git a/drivers/atm/he.c b/drivers/atm/he.c
index aa6be2698669..c39702bc279d 100644
--- a/drivers/atm/he.c
+++ b/drivers/atm/he.c
@@ -533,14 +533,13 @@ static void he_init_tx_lbfp(struct he_dev *he_dev)
 
 static int he_init_tpdrq(struct he_dev *he_dev)
 {
-	he_dev->tpdrq_base = pci_alloc_consistent(he_dev->pci_dev,
-		CONFIG_TPDRQ_SIZE * sizeof(struct he_tpdrq), &he_dev->tpdrq_phys);
+	he_dev->tpdrq_base = pci_zalloc_consistent(he_dev->pci_dev,
+						   CONFIG_TPDRQ_SIZE * sizeof(struct he_tpdrq),
+						   &he_dev->tpdrq_phys);
 	if (he_dev->tpdrq_base == NULL) {
 		hprintk("failed to alloc tpdrq\n");
 		return -ENOMEM;
 	}
-	memset(he_dev->tpdrq_base, 0,
-				CONFIG_TPDRQ_SIZE * sizeof(struct he_tpdrq));
 
 	he_dev->tpdrq_tail = he_dev->tpdrq_base;
 	he_dev->tpdrq_head = he_dev->tpdrq_base;
@@ -804,13 +803,13 @@ static int he_init_group(struct he_dev *he_dev, int group)
 		goto out_free_rbpl_virt;
 	}
 
-	he_dev->rbpl_base = pci_alloc_consistent(he_dev->pci_dev,
-		CONFIG_RBPL_SIZE * sizeof(struct he_rbp), &he_dev->rbpl_phys);
+	he_dev->rbpl_base = pci_zalloc_consistent(he_dev->pci_dev,
+						  CONFIG_RBPL_SIZE * sizeof(struct he_rbp),
+						  &he_dev->rbpl_phys);
 	if (he_dev->rbpl_base == NULL) {
 		hprintk("failed to alloc rbpl_base\n");
 		goto out_destroy_rbpl_pool;
 	}
-	memset(he_dev->rbpl_base, 0, CONFIG_RBPL_SIZE * sizeof(struct he_rbp));
 
 	INIT_LIST_HEAD(&he_dev->rbpl_outstanding);
 
@@ -843,13 +842,13 @@ static int he_init_group(struct he_dev *he_dev, int group)
 
 	/* rx buffer ready queue */
 
-	he_dev->rbrq_base = pci_alloc_consistent(he_dev->pci_dev,
-		CONFIG_RBRQ_SIZE * sizeof(struct he_rbrq), &he_dev->rbrq_phys);
+	he_dev->rbrq_base = pci_zalloc_consistent(he_dev->pci_dev,
+						  CONFIG_RBRQ_SIZE * sizeof(struct he_rbrq),
+						  &he_dev->rbrq_phys);
 	if (he_dev->rbrq_base == NULL) {
 		hprintk("failed to allocate rbrq\n");
 		goto out_free_rbpl;
 	}
-	memset(he_dev->rbrq_base, 0, CONFIG_RBRQ_SIZE * sizeof(struct he_rbrq));
 
 	he_dev->rbrq_head = he_dev->rbrq_base;
 	he_writel(he_dev, he_dev->rbrq_phys, G0_RBRQ_ST + (group * 16));
@@ -867,13 +866,13 @@ static int he_init_group(struct he_dev *he_dev, int group)
 
 	/* tx buffer ready queue */
 
-	he_dev->tbrq_base = pci_alloc_consistent(he_dev->pci_dev,
-		CONFIG_TBRQ_SIZE * sizeof(struct he_tbrq), &he_dev->tbrq_phys);
+	he_dev->tbrq_base = pci_zalloc_consistent(he_dev->pci_dev,
+						  CONFIG_TBRQ_SIZE * sizeof(struct he_tbrq),
+						  &he_dev->tbrq_phys);
 	if (he_dev->tbrq_base == NULL) {
 		hprintk("failed to allocate tbrq\n");
 		goto out_free_rbpq_base;
 	}
-	memset(he_dev->tbrq_base, 0, CONFIG_TBRQ_SIZE * sizeof(struct he_tbrq));
 
 	he_dev->tbrq_head = he_dev->tbrq_base;
 
@@ -1460,13 +1459,13 @@ static int he_start(struct atm_dev *dev)
 
 	/* host status page */
 
-	he_dev->hsp = pci_alloc_consistent(he_dev->pci_dev,
-				sizeof(struct he_hsp), &he_dev->hsp_phys);
+	he_dev->hsp = pci_zalloc_consistent(he_dev->pci_dev,
+					    sizeof(struct he_hsp),
+					    &he_dev->hsp_phys);
 	if (he_dev->hsp == NULL) {
 		hprintk("failed to allocate host status page\n");
 		return -ENOMEM;
 	}
-	memset(he_dev->hsp, 0, sizeof(struct he_hsp));
 	he_writel(he_dev, he_dev->hsp_phys, HSP_BA);
 
 	/* initialize framer */
diff --git a/drivers/atm/idt77252.c b/drivers/atm/idt77252.c
index b621f56a36be..2b24ed056728 100644
--- a/drivers/atm/idt77252.c
+++ b/drivers/atm/idt77252.c
@@ -641,13 +641,11 @@ alloc_scq(struct idt77252_dev *card, int class)
 	scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
 	if (!scq)
 		return NULL;
-	scq->base = pci_alloc_consistent(card->pcidev, SCQ_SIZE,
-					 &scq->paddr);
+	scq->base = pci_zalloc_consistent(card->pcidev, SCQ_SIZE, &scq->paddr);
 	if (scq->base == NULL) {
 		kfree(scq);
 		return NULL;
 	}
-	memset(scq->base, 0, SCQ_SIZE);
 
 	scq->next = scq->base;
 	scq->last = scq->base + (SCQ_ENTRIES - 1);
@@ -972,13 +970,12 @@ init_rsq(struct idt77252_dev *card)
 {
 	struct rsq_entry *rsqe;
 
-	card->rsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
-					      &card->rsq.paddr);
+	card->rsq.base = pci_zalloc_consistent(card->pcidev, RSQSIZE,
+					       &card->rsq.paddr);
 	if (card->rsq.base == NULL) {
 		printk("%s: can't allocate RSQ.\n", card->name);
 		return -1;
 	}
-	memset(card->rsq.base, 0, RSQSIZE);
 
 	card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
 	card->rsq.next = card->rsq.last;
@@ -3400,14 +3397,14 @@ static int init_card(struct atm_dev *dev)
 	writel(0, SAR_REG_GP);
 
 	/* Initialize RAW Cell Handle Register  */
-	card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32),
-						  &card->raw_cell_paddr);
+	card->raw_cell_hnd = pci_zalloc_consistent(card->pcidev,
+						   2 * sizeof(u32),
+						   &card->raw_cell_paddr);
 	if (!card->raw_cell_hnd) {
 		printk("%s: memory allocation failure.\n", card->name);
 		deinit_card(card);
 		return -1;
 	}
-	memset(card->raw_cell_hnd, 0, 2 * sizeof(u32));
 	writel(card->raw_cell_paddr, SAR_REG_RAWHND);
 	IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
 		card->raw_cell_hnd);
diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c
index 125d84505738..811e11c82f32 100644
--- a/drivers/block/DAC960.c
+++ b/drivers/block/DAC960.c
@@ -6741,11 +6741,11 @@ static long DAC960_gam_ioctl(struct file *file, unsigned int Request,
 	ErrorCode = -ENOMEM;
 	if (DataTransferLength > 0)
 	  {
-	    DataTransferBuffer = pci_alloc_consistent(Controller->PCIDevice,
-				DataTransferLength, &DataTransferBufferDMA);
+	    DataTransferBuffer = pci_zalloc_consistent(Controller->PCIDevice,
+                                                       DataTransferLength,
+                                                       &DataTransferBufferDMA);
 	    if (DataTransferBuffer == NULL)
 	    	break;
-	    memset(DataTransferBuffer, 0, DataTransferLength);
 	  }
 	else if (DataTransferLength < 0)
 	  {
@@ -6877,11 +6877,11 @@ static long DAC960_gam_ioctl(struct file *file, unsigned int Request,
     	ErrorCode = -ENOMEM;
 	if (DataTransferLength > 0)
 	  {
-	    DataTransferBuffer = pci_alloc_consistent(Controller->PCIDevice,
-				DataTransferLength, &DataTransferBufferDMA);
+	    DataTransferBuffer = pci_zalloc_consistent(Controller->PCIDevice,
+                                                       DataTransferLength,
+                                                       &DataTransferBufferDMA);
 	    if (DataTransferBuffer == NULL)
 	    	break;
-	    memset(DataTransferBuffer, 0, DataTransferLength);
 	  }
 	else if (DataTransferLength < 0)
 	  {
@@ -6899,14 +6899,14 @@ static long DAC960_gam_ioctl(struct file *file, unsigned int Request,
 	RequestSenseLength = UserCommand.RequestSenseLength;
 	if (RequestSenseLength > 0)
 	  {
-	    RequestSenseBuffer = pci_alloc_consistent(Controller->PCIDevice,
-			RequestSenseLength, &RequestSenseBufferDMA);
+	    RequestSenseBuffer = pci_zalloc_consistent(Controller->PCIDevice,
+                                                       RequestSenseLength,
+                                                       &RequestSenseBufferDMA);
 	    if (RequestSenseBuffer == NULL)
 	      {
 		ErrorCode = -ENOMEM;
 		goto Failure2;
 	      }
-	    memset(RequestSenseBuffer, 0, RequestSenseLength);
 	  }
 	spin_lock_irqsave(&Controller->queue_lock, flags);
 	while ((Command = DAC960_AllocateCommand(Controller)) == NULL)
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 4595c22f33f7..ff20f192b0f6 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -1014,24 +1014,21 @@ static CommandList_struct *cmd_special_alloc(ctlr_info_t *h)
 	u64bit temp64;
 	dma_addr_t cmd_dma_handle, err_dma_handle;
 
-	c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
-		sizeof(CommandList_struct), &cmd_dma_handle);
+	c = pci_zalloc_consistent(h->pdev, sizeof(CommandList_struct),
+				  &cmd_dma_handle);
 	if (c == NULL)
 		return NULL;
-	memset(c, 0, sizeof(CommandList_struct));
 
 	c->cmdindex = -1;
 
-	c->err_info = (ErrorInfo_struct *)
-	    pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
-		    &err_dma_handle);
+	c->err_info = pci_zalloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
+					    &err_dma_handle);
 
 	if (c->err_info == NULL) {
 		pci_free_consistent(h->pdev,
 			sizeof(CommandList_struct), c, cmd_dma_handle);
 		return NULL;
 	}
-	memset(c->err_info, 0, sizeof(ErrorInfo_struct));
 
 	INIT_LIST_HEAD(&c->list);
 	c->busaddr = (__u32) cmd_dma_handle;
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
index 608532d3f8c9..f0a089df85cc 100644
--- a/drivers/block/skd_main.c
+++ b/drivers/block/skd_main.c
@@ -4112,16 +4112,14 @@ static int skd_cons_skcomp(struct skd_device *skdev)
 		 skdev->name, __func__, __LINE__,
 		 nbytes, SKD_N_COMPLETION_ENTRY);
 
-	skcomp = pci_alloc_consistent(skdev->pdev, nbytes,
-				      &skdev->cq_dma_address);
+	skcomp = pci_zalloc_consistent(skdev->pdev, nbytes,
+				       &skdev->cq_dma_address);
 
 	if (skcomp == NULL) {
 		rc = -ENOMEM;
 		goto err_out;
 	}
 
-	memset(skcomp, 0, nbytes);
-
 	skdev->skcomp_table = skcomp;
 	skdev->skerr_table = (struct fit_comp_error_info *)((char *)skcomp +
 							   sizeof(*skcomp) *
@@ -4304,15 +4302,14 @@ static int skd_cons_skspcl(struct skd_device *skdev)
 
 		nbytes = SKD_N_SPECIAL_FITMSG_BYTES;
 
-		skspcl->msg_buf = pci_alloc_consistent(skdev->pdev, nbytes,
-						       &skspcl->mb_dma_address);
+		skspcl->msg_buf =
+			pci_zalloc_consistent(skdev->pdev, nbytes,
+					      &skspcl->mb_dma_address);
 		if (skspcl->msg_buf == NULL) {
 			rc = -ENOMEM;
 			goto err_out;
 		}
 
-		memset(skspcl->msg_buf, 0, nbytes);
-
 		skspcl->req.sg = kzalloc(sizeof(struct scatterlist) *
 					 SKD_N_SG_PER_SPECIAL, GFP_KERNEL);
 		if (skspcl->req.sg == NULL) {
@@ -4353,25 +4350,21 @@ static int skd_cons_sksb(struct skd_device *skdev)
 
 	nbytes = SKD_N_INTERNAL_BYTES;
 
-	skspcl->data_buf = pci_alloc_consistent(skdev->pdev, nbytes,
-						&skspcl->db_dma_address);
+	skspcl->data_buf = pci_zalloc_consistent(skdev->pdev, nbytes,
+						 &skspcl->db_dma_address);
 	if (skspcl->data_buf == NULL) {
 		rc = -ENOMEM;
 		goto err_out;
 	}
 
-	memset(skspcl->data_buf, 0, nbytes);
-
 	nbytes = SKD_N_SPECIAL_FITMSG_BYTES;
-	skspcl->msg_buf = pci_alloc_consistent(skdev->pdev, nbytes,
-					       &skspcl->mb_dma_address);
+	skspcl->msg_buf = pci_zalloc_consistent(skdev->pdev, nbytes,
+						&skspcl->mb_dma_address);
 	if (skspcl->msg_buf == NULL) {
 		rc = -ENOMEM;
 		goto err_out;
 	}
 
-	memset(skspcl->msg_buf, 0, nbytes);
-
 	skspcl->req.sksg_list = skd_cons_sg_list(skdev, 1,
 						 &skspcl->req.sksg_dma_address);
 	if (skspcl->req.sksg_list == NULL) {
diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c
index 12fea3e22348..8d2a7728434d 100644
--- a/drivers/crypto/hifn_795x.c
+++ b/drivers/crypto/hifn_795x.c
@@ -2617,14 +2617,13 @@ static int hifn_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		}
 	}
 
-	dev->desc_virt = pci_alloc_consistent(pdev, sizeof(struct hifn_dma),
-			&dev->desc_dma);
+	dev->desc_virt = pci_zalloc_consistent(pdev, sizeof(struct hifn_dma),
+					       &dev->desc_dma);
 	if (!dev->desc_virt) {
 		dprintk("Failed to allocate descriptor rings.\n");
 		err = -ENOMEM;
 		goto err_out_unmap_bars;
 	}
-	memset(dev->desc_virt, 0, sizeof(struct hifn_dma));
 
 	dev->pdev = pdev;
 	dev->irq = pdev->irq;
diff --git a/drivers/firmware/efi/runtime-map.c b/drivers/firmware/efi/runtime-map.c
index 97cdd16a2169..018c29a26615 100644
--- a/drivers/firmware/efi/runtime-map.c
+++ b/drivers/firmware/efi/runtime-map.c
@@ -138,6 +138,27 @@ add_sysfs_runtime_map_entry(struct kobject *kobj, int nr)
 	return entry;
 }
 
+int efi_get_runtime_map_size(void)
+{
+	return nr_efi_runtime_map * efi_memdesc_size;
+}
+
+int efi_get_runtime_map_desc_size(void)
+{
+	return efi_memdesc_size;
+}
+
+int efi_runtime_map_copy(void *buf, size_t bufsz)
+{
+	size_t sz = efi_get_runtime_map_size();
+
+	if (sz > bufsz)
+		sz = bufsz;
+
+	memcpy(buf, efi_runtime_map, sz);
+	return 0;
+}
+
 void efi_runtime_map_setup(void *map, int nr_entries, u32 desc_size)
 {
 	efi_runtime_map = map;
diff --git a/drivers/gpu/drm/i810/i810_dma.c b/drivers/gpu/drm/i810/i810_dma.c
index e88bac1d781f..bae897de9468 100644
--- a/drivers/gpu/drm/i810/i810_dma.c
+++ b/drivers/gpu/drm/i810/i810_dma.c
@@ -393,15 +393,14 @@ static int i810_dma_initialize(struct drm_device *dev,
 
 	/* Program Hardware Status Page */
 	dev_priv->hw_status_page =
-	    pci_alloc_consistent(dev->pdev, PAGE_SIZE,
-				 &dev_priv->dma_status_page);
+		pci_zalloc_consistent(dev->pdev, PAGE_SIZE,
+				      &dev_priv->dma_status_page);
 	if (!dev_priv->hw_status_page) {
 		dev->dev_private = (void *)dev_priv;
 		i810_dma_cleanup(dev);
 		DRM_ERROR("Can not allocate hardware status page\n");
 		return -ENOMEM;
 	}
-	memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 	DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);
 
 	I810_WRITE(0x02080, dev_priv->dma_status_page);
diff --git a/drivers/infiniband/hw/amso1100/c2.c b/drivers/infiniband/hw/amso1100/c2.c
index 00400c352c1a..766a71ccefed 100644
--- a/drivers/infiniband/hw/amso1100/c2.c
+++ b/drivers/infiniband/hw/amso1100/c2.c
@@ -604,16 +604,14 @@ static int c2_up(struct net_device *netdev)
 	tx_size = c2_port->tx_ring.count * sizeof(struct c2_tx_desc);
 
 	c2_port->mem_size = tx_size + rx_size;
-	c2_port->mem = pci_alloc_consistent(c2dev->pcidev, c2_port->mem_size,
-					    &c2_port->dma);
+	c2_port->mem = pci_zalloc_consistent(c2dev->pcidev, c2_port->mem_size,
+					     &c2_port->dma);
 	if (c2_port->mem == NULL) {
 		pr_debug("Unable to allocate memory for "
 			"host descriptor rings\n");
 		return -ENOMEM;
 	}
 
-	memset(c2_port->mem, 0, c2_port->mem_size);
-
 	/* Create the Rx host descriptor ring */
 	if ((ret =
 	     c2_rx_ring_alloc(&c2_port->rx_ring, c2_port->mem, c2_port->dma,
diff --git a/drivers/infiniband/hw/nes/nes_hw.c b/drivers/infiniband/hw/nes/nes_hw.c
index 90200245c5eb..02120d340d50 100644
--- a/drivers/infiniband/hw/nes/nes_hw.c
+++ b/drivers/infiniband/hw/nes/nes_hw.c
@@ -1003,13 +1003,13 @@ int nes_init_cqp(struct nes_device *nesdev)
 			(sizeof(struct nes_hw_aeqe) * nesadapter->max_qp) +
 			sizeof(struct nes_hw_cqp_qp_context);
 
-	nesdev->cqp_vbase = pci_alloc_consistent(nesdev->pcidev, nesdev->cqp_mem_size,
-			&nesdev->cqp_pbase);
+	nesdev->cqp_vbase = pci_zalloc_consistent(nesdev->pcidev,
+						  nesdev->cqp_mem_size,
+						  &nesdev->cqp_pbase);
 	if (!nesdev->cqp_vbase) {
 		nes_debug(NES_DBG_INIT, "Unable to allocate memory for host descriptor rings\n");
 		return -ENOMEM;
 	}
-	memset(nesdev->cqp_vbase, 0, nesdev->cqp_mem_size);
 
 	/* Allocate a twice the number of CQP requests as the SQ size */
 	nesdev->nes_cqp_requests = kzalloc(sizeof(struct nes_cqp_request) *
@@ -1691,13 +1691,13 @@ int nes_init_nic_qp(struct nes_device *nesdev, struct net_device *netdev)
 			(NES_NIC_WQ_SIZE * 2 * sizeof(struct nes_hw_nic_cqe)) +
 			sizeof(struct nes_hw_nic_qp_context);
 
-	nesvnic->nic_vbase = pci_alloc_consistent(nesdev->pcidev, nesvnic->nic_mem_size,
-			&nesvnic->nic_pbase);
+	nesvnic->nic_vbase = pci_zalloc_consistent(nesdev->pcidev,
+						   nesvnic->nic_mem_size,
+						   &nesvnic->nic_pbase);
 	if (!nesvnic->nic_vbase) {
 		nes_debug(NES_DBG_INIT, "Unable to allocate memory for NIC host descriptor rings\n");
 		return -ENOMEM;
 	}
-	memset(nesvnic->nic_vbase, 0, nesvnic->nic_mem_size);
 	nes_debug(NES_DBG_INIT, "Allocated NIC QP structures at %p (phys = %016lX), size = %u.\n",
 			nesvnic->nic_vbase, (unsigned long)nesvnic->nic_pbase, nesvnic->nic_mem_size);
 
diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c
index 218dd3574285..fef067c959fc 100644
--- a/drivers/infiniband/hw/nes/nes_verbs.c
+++ b/drivers/infiniband/hw/nes/nes_verbs.c
@@ -1616,8 +1616,8 @@ static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
 				entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
 
 		/* allocate the physical buffer space */
-		mem = pci_alloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
-				&nescq->hw_cq.cq_pbase);
+		mem = pci_zalloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
+					    &nescq->hw_cq.cq_pbase);
 		if (!mem) {
 			printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
 			nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
@@ -1625,7 +1625,6 @@ static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
 			return ERR_PTR(-ENOMEM);
 		}
 
-		memset(mem, 0, nescq->cq_mem_size);
 		nescq->hw_cq.cq_vbase = mem;
 		nescq->hw_cq.cq_head = 0;
 		nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
diff --git a/drivers/media/common/saa7146/saa7146_core.c b/drivers/media/common/saa7146/saa7146_core.c
index 34b0d0ddeef3..97afee672d07 100644
--- a/drivers/media/common/saa7146/saa7146_core.c
+++ b/drivers/media/common/saa7146/saa7146_core.c
@@ -421,23 +421,20 @@ static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent
 	err = -ENOMEM;
 
 	/* get memory for various stuff */
-	dev->d_rps0.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM,
-						    &dev->d_rps0.dma_handle);
+	dev->d_rps0.cpu_addr = pci_zalloc_consistent(pci, SAA7146_RPS_MEM,
+						     &dev->d_rps0.dma_handle);
 	if (!dev->d_rps0.cpu_addr)
 		goto err_free_irq;
-	memset(dev->d_rps0.cpu_addr, 0x0, SAA7146_RPS_MEM);
 
-	dev->d_rps1.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM,
-						    &dev->d_rps1.dma_handle);
+	dev->d_rps1.cpu_addr = pci_zalloc_consistent(pci, SAA7146_RPS_MEM,
+						     &dev->d_rps1.dma_handle);
 	if (!dev->d_rps1.cpu_addr)
 		goto err_free_rps0;
-	memset(dev->d_rps1.cpu_addr, 0x0, SAA7146_RPS_MEM);
 
-	dev->d_i2c.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM,
-						   &dev->d_i2c.dma_handle);
+	dev->d_i2c.cpu_addr = pci_zalloc_consistent(pci, SAA7146_RPS_MEM,
+						    &dev->d_i2c.dma_handle);
 	if (!dev->d_i2c.cpu_addr)
 		goto err_free_rps1;
-	memset(dev->d_i2c.cpu_addr, 0x0, SAA7146_RPS_MEM);
 
 	/* the rest + print status message */
 
diff --git a/drivers/media/common/saa7146/saa7146_fops.c b/drivers/media/common/saa7146/saa7146_fops.c
index d9e1d6395ed9..6c47f3fe9b0f 100644
--- a/drivers/media/common/saa7146/saa7146_fops.c
+++ b/drivers/media/common/saa7146/saa7146_fops.c
@@ -520,14 +520,15 @@ int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
 	   configuration data) */
 	dev->ext_vv_data = ext_vv;
 
-	vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
+	vv->d_clipping.cpu_addr =
+		pci_zalloc_consistent(dev->pci, SAA7146_CLIPPING_MEM,
+				      &vv->d_clipping.dma_handle);
 	if( NULL == vv->d_clipping.cpu_addr ) {
 		ERR("out of memory. aborting.\n");
 		kfree(vv);
 		v4l2_ctrl_handler_free(hdl);
 		return -1;
 	}
-	memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
 
 	saa7146_video_uops.init(dev,vv);
 	if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
diff --git a/drivers/media/pci/bt8xx/bt878.c b/drivers/media/pci/bt8xx/bt878.c
index d0c281f41a0a..11765835d7b2 100644
--- a/drivers/media/pci/bt8xx/bt878.c
+++ b/drivers/media/pci/bt8xx/bt878.c
@@ -101,28 +101,20 @@ static int bt878_mem_alloc(struct bt878 *bt)
 	if (!bt->buf_cpu) {
 		bt->buf_size = 128 * 1024;
 
-		bt->buf_cpu =
-		    pci_alloc_consistent(bt->dev, bt->buf_size,
-					 &bt->buf_dma);
-
+		bt->buf_cpu = pci_zalloc_consistent(bt->dev, bt->buf_size,
+						    &bt->buf_dma);
 		if (!bt->buf_cpu)
 			return -ENOMEM;
-
-		memset(bt->buf_cpu, 0, bt->buf_size);
 	}
 
 	if (!bt->risc_cpu) {
 		bt->risc_size = PAGE_SIZE;
-		bt->risc_cpu =
-		    pci_alloc_consistent(bt->dev, bt->risc_size,
-					 &bt->risc_dma);
-
+		bt->risc_cpu = pci_zalloc_consistent(bt->dev, bt->risc_size,
+						     &bt->risc_dma);
 		if (!bt->risc_cpu) {
 			bt878_mem_free(bt);
 			return -ENOMEM;
 		}
-
-		memset(bt->risc_cpu, 0, bt->risc_size);
 	}
 
 	return 0;
diff --git a/drivers/media/pci/ngene/ngene-core.c b/drivers/media/pci/ngene/ngene-core.c
index 826228c3800e..4930b55fd5f4 100644
--- a/drivers/media/pci/ngene/ngene-core.c
+++ b/drivers/media/pci/ngene/ngene-core.c
@@ -1075,12 +1075,11 @@ static int AllocCommonBuffers(struct ngene *dev)
 	dev->ngenetohost = dev->FWInterfaceBuffer + 256;
 	dev->EventBuffer = dev->FWInterfaceBuffer + 512;
 
-	dev->OverflowBuffer = pci_alloc_consistent(dev->pci_dev,
-						   OVERFLOW_BUFFER_SIZE,
-						   &dev->PAOverflowBuffer);
+	dev->OverflowBuffer = pci_zalloc_consistent(dev->pci_dev,
+						    OVERFLOW_BUFFER_SIZE,
+						    &dev->PAOverflowBuffer);
 	if (!dev->OverflowBuffer)
 		return -ENOMEM;
-	memset(dev->OverflowBuffer, 0, OVERFLOW_BUFFER_SIZE);
 
 	for (i = STREAM_VIDEOIN1; i < MAX_STREAM; i++) {
 		int type = dev->card_info->io_type[i];
diff --git a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
index f166ffc9800a..cef7a00099ea 100644
--- a/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
+++ b/drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c
@@ -803,11 +803,9 @@ static int ttusb_alloc_iso_urbs(struct ttusb *ttusb)
 {
 	int i;
 
-	ttusb->iso_buffer = pci_alloc_consistent(NULL,
-						 ISO_FRAME_SIZE *
-						 FRAMES_PER_ISO_BUF *
-						 ISO_BUF_COUNT,
-						 &ttusb->iso_dma_handle);
+	ttusb->iso_buffer = pci_zalloc_consistent(NULL,
+						  ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF * ISO_BUF_COUNT,
+						  &ttusb->iso_dma_handle);
 
 	if (!ttusb->iso_buffer) {
 		dprintk("%s: pci_alloc_consistent - not enough memory\n",
@@ -815,9 +813,6 @@ static int ttusb_alloc_iso_urbs(struct ttusb *ttusb)
 		return -ENOMEM;
 	}
 
-	memset(ttusb->iso_buffer, 0,
-	       ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF * ISO_BUF_COUNT);
-
 	for (i = 0; i < ISO_BUF_COUNT; i++) {
 		struct urb *urb;
 
diff --git a/drivers/media/usb/ttusb-dec/ttusb_dec.c b/drivers/media/usb/ttusb-dec/ttusb_dec.c
index 29724af9b9ab..15ab584cf265 100644
--- a/drivers/media/usb/ttusb-dec/ttusb_dec.c
+++ b/drivers/media/usb/ttusb-dec/ttusb_dec.c
@@ -1151,11 +1151,9 @@ static int ttusb_dec_alloc_iso_urbs(struct ttusb_dec *dec)
 
 	dprintk("%s\n", __func__);
 
-	dec->iso_buffer = pci_alloc_consistent(NULL,
-					       ISO_FRAME_SIZE *
-					       (FRAMES_PER_ISO_BUF *
-						ISO_BUF_COUNT),
-					       &dec->iso_dma_handle);
+	dec->iso_buffer = pci_zalloc_consistent(NULL,
+						ISO_FRAME_SIZE * (FRAMES_PER_ISO_BUF * ISO_BUF_COUNT),
+						&dec->iso_dma_handle);
 
 	if (!dec->iso_buffer) {
 		dprintk("%s: pci_alloc_consistent - not enough memory\n",
@@ -1163,9 +1161,6 @@ static int ttusb_dec_alloc_iso_urbs(struct ttusb_dec *dec)
 		return -ENOMEM;
 	}
 
-	memset(dec->iso_buffer, 0,
-	       ISO_FRAME_SIZE * (FRAMES_PER_ISO_BUF * ISO_BUF_COUNT));
-
 	for (i = 0; i < ISO_BUF_COUNT; i++) {
 		struct urb *urb;
 
diff --git a/drivers/net/ethernet/amd/pcnet32.c b/drivers/net/ethernet/amd/pcnet32.c
index e7cc9174e364..4a8fdc4721d5 100644
--- a/drivers/net/ethernet/amd/pcnet32.c
+++ b/drivers/net/ethernet/amd/pcnet32.c
@@ -481,37 +481,32 @@ static void pcnet32_realloc_tx_ring(struct net_device *dev,
 	dma_addr_t *new_dma_addr_list;
 	struct pcnet32_tx_head *new_tx_ring;
 	struct sk_buff **new_skb_list;
+	unsigned int entries = BIT(size);
 
 	pcnet32_purge_tx_ring(dev);
 
-	new_tx_ring = pci_alloc_consistent(lp->pci_dev,
-					   sizeof(struct pcnet32_tx_head) *
-					   (1 << size),
-					   &new_ring_dma_addr);
-	if (new_tx_ring == NULL) {
-		netif_err(lp, drv, dev, "Consistent memory allocation failed\n");
+	new_tx_ring =
+		pci_zalloc_consistent(lp->pci_dev,
+				      sizeof(struct pcnet32_tx_head) * entries,
+				      &new_ring_dma_addr);
+	if (new_tx_ring == NULL)
 		return;
-	}
-	memset(new_tx_ring, 0, sizeof(struct pcnet32_tx_head) * (1 << size));
 
-	new_dma_addr_list = kcalloc(1 << size, sizeof(dma_addr_t),
-				    GFP_ATOMIC);
+	new_dma_addr_list = kcalloc(entries, sizeof(dma_addr_t), GFP_ATOMIC);
 	if (!new_dma_addr_list)
 		goto free_new_tx_ring;
 
-	new_skb_list = kcalloc(1 << size, sizeof(struct sk_buff *),
-			       GFP_ATOMIC);
+	new_skb_list = kcalloc(entries, sizeof(struct sk_buff *), GFP_ATOMIC);
 	if (!new_skb_list)
 		goto free_new_lists;
 
 	kfree(lp->tx_skbuff);
 	kfree(lp->tx_dma_addr);
 	pci_free_consistent(lp->pci_dev,
-			    sizeof(struct pcnet32_tx_head) *
-			    lp->tx_ring_size, lp->tx_ring,
-			    lp->tx_ring_dma_addr);
+			    sizeof(struct pcnet32_tx_head) * lp->tx_ring_size,
+			    lp->tx_ring, lp->tx_ring_dma_addr);
 
-	lp->tx_ring_size = (1 << size);
+	lp->tx_ring_size = entries;
 	lp->tx_mod_mask = lp->tx_ring_size - 1;
 	lp->tx_len_bits = (size << 12);
 	lp->tx_ring = new_tx_ring;
@@ -524,8 +519,7 @@ free_new_lists:
 	kfree(new_dma_addr_list);
 free_new_tx_ring:
 	pci_free_consistent(lp->pci_dev,
-			    sizeof(struct pcnet32_tx_head) *
-			    (1 << size),
+			    sizeof(struct pcnet32_tx_head) * entries,
 			    new_tx_ring,
 			    new_ring_dma_addr);
 }
@@ -549,17 +543,14 @@ static void pcnet32_realloc_rx_ring(struct net_device *dev,
 	struct pcnet32_rx_head *new_rx_ring;
 	struct sk_buff **new_skb_list;
 	int new, overlap;
-	unsigned int entries = 1 << size;
+	unsigned int entries = BIT(size);
 
-	new_rx_ring = pci_alloc_consistent(lp->pci_dev,
-					   sizeof(struct pcnet32_rx_head) *
-					   entries,
-					   &new_ring_dma_addr);
-	if (new_rx_ring == NULL) {
-		netif_err(lp, drv, dev, "Consistent memory allocation failed\n");
+	new_rx_ring =
+		pci_zalloc_consistent(lp->pci_dev,
+				      sizeof(struct pcnet32_rx_head) * entries,
+				      &new_ring_dma_addr);
+	if (new_rx_ring == NULL)
 		return;
-	}
-	memset(new_rx_ring, 0, sizeof(struct pcnet32_rx_head) * entries);
 
 	new_dma_addr_list = kcalloc(entries, sizeof(dma_addr_t), GFP_ATOMIC);
 	if (!new_dma_addr_list)
diff --git a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
index 4345332533ad..316e0c3fe048 100644
--- a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
+++ b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
@@ -831,17 +831,14 @@ static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 	/* real ring DMA buffer */
 
 	size = adapter->ring_size;
-	adapter->ring_vir_addr = pci_alloc_consistent(pdev,
-			adapter->ring_size, &adapter->ring_dma);
-
+	adapter->ring_vir_addr = pci_zalloc_consistent(pdev, adapter->ring_size,
+						       &adapter->ring_dma);
 	if (adapter->ring_vir_addr == NULL) {
 		netdev_err(adapter->netdev,
 			   "pci_alloc_consistent failed, size = D%d\n", size);
 		return -ENOMEM;
 	}
 
-	memset(adapter->ring_vir_addr, 0, adapter->ring_size);
-
 	rx_page_desc = rx_ring->rx_page_desc;
 
 	/* Init TPD Ring */
diff --git a/drivers/net/ethernet/cisco/enic/vnic_dev.c b/drivers/net/ethernet/cisco/enic/vnic_dev.c
index 5abc496bcf29..37472ce4fac3 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_dev.c
+++ b/drivers/net/ethernet/cisco/enic/vnic_dev.c
@@ -432,14 +432,12 @@ int vnic_dev_fw_info(struct vnic_dev *vdev,
 	int err = 0;
 
 	if (!vdev->fw_info) {
-		vdev->fw_info = pci_alloc_consistent(vdev->pdev,
-			sizeof(struct vnic_devcmd_fw_info),
-			&vdev->fw_info_pa);
+		vdev->fw_info = pci_zalloc_consistent(vdev->pdev,
+						      sizeof(struct vnic_devcmd_fw_info),
+						      &vdev->fw_info_pa);
 		if (!vdev->fw_info)
 			return -ENOMEM;
 
-		memset(vdev->fw_info, 0, sizeof(struct vnic_devcmd_fw_info));
-
 		a0 = vdev->fw_info_pa;
 		a1 = sizeof(struct vnic_devcmd_fw_info);
 
diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index 69693384b58c..59915144aabb 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -1622,11 +1622,10 @@ static int sky2_alloc_buffers(struct sky2_port *sky2)
 	if (!sky2->tx_ring)
 		goto nomem;
 
-	sky2->rx_le = pci_alloc_consistent(hw->pdev, RX_LE_BYTES,
-					   &sky2->rx_le_map);
+	sky2->rx_le = pci_zalloc_consistent(hw->pdev, RX_LE_BYTES,
+					    &sky2->rx_le_map);
 	if (!sky2->rx_le)
 		goto nomem;
-	memset(sky2->rx_le, 0, RX_LE_BYTES);
 
 	sky2->rx_ring = kcalloc(sky2->rx_pending, sizeof(struct rx_ring_info),
 				GFP_KERNEL);
diff --git a/drivers/net/ethernet/micrel/ksz884x.c b/drivers/net/ethernet/micrel/ksz884x.c
index 064a48d0c368..cd5f106306d9 100644
--- a/drivers/net/ethernet/micrel/ksz884x.c
+++ b/drivers/net/ethernet/micrel/ksz884x.c
@@ -4409,14 +4409,13 @@ static int ksz_alloc_desc(struct dev_info *adapter)
 		DESC_ALIGNMENT;
 
 	adapter->desc_pool.alloc_virt =
-		pci_alloc_consistent(
-			adapter->pdev, adapter->desc_pool.alloc_size,
-			&adapter->desc_pool.dma_addr);
+		pci_zalloc_consistent(adapter->pdev,
+				      adapter->desc_pool.alloc_size,
+				      &adapter->desc_pool.dma_addr);
 	if (adapter->desc_pool.alloc_virt == NULL) {
 		adapter->desc_pool.alloc_size = 0;
 		return 1;
 	}
-	memset(adapter->desc_pool.alloc_virt, 0, adapter->desc_pool.alloc_size);
 
 	/* Align to the next cache line boundary. */
 	offset = (((ulong) adapter->desc_pool.alloc_virt % DESC_ALIGNMENT) ?
diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_ctx.c b/drivers/net/ethernet/qlogic/netxen/netxen_nic_ctx.c
index 6f6be57f4690..b8d5270359cd 100644
--- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_ctx.c
+++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_ctx.c
@@ -129,14 +129,12 @@ netxen_get_minidump_template(struct netxen_adapter *adapter)
 		return NX_RCODE_INVALID_ARGS;
 	}
 
-	addr = pci_alloc_consistent(adapter->pdev, size, &md_template_addr);
-
+	addr = pci_zalloc_consistent(adapter->pdev, size, &md_template_addr);
 	if (!addr) {
 		dev_err(&adapter->pdev->dev, "Unable to allocate dmable memory for template.\n");
 		return -ENOMEM;
 	}
 
-	memset(addr, 0, size);
 	memset(&cmd, 0, sizeof(cmd));
 	memset(&cmd.rsp, 1, sizeof(struct _cdrp_cmd));
 	cmd.req.cmd = NX_CDRP_CMD_GET_TEMP_HDR;
diff --git a/drivers/net/ethernet/qlogic/qlge/qlge_main.c b/drivers/net/ethernet/qlogic/qlge/qlge_main.c
index b40050e03a56..d836ace52277 100644
--- a/drivers/net/ethernet/qlogic/qlge/qlge_main.c
+++ b/drivers/net/ethernet/qlogic/qlge/qlge_main.c
@@ -2727,23 +2727,22 @@ static void ql_free_shadow_space(struct ql_adapter *qdev)
 static int ql_alloc_shadow_space(struct ql_adapter *qdev)
 {
 	qdev->rx_ring_shadow_reg_area =
-	    pci_alloc_consistent(qdev->pdev,
-				 PAGE_SIZE, &qdev->rx_ring_shadow_reg_dma);
+		pci_zalloc_consistent(qdev->pdev, PAGE_SIZE,
+				      &qdev->rx_ring_shadow_reg_dma);
 	if (qdev->rx_ring_shadow_reg_area == NULL) {
 		netif_err(qdev, ifup, qdev->ndev,
 			  "Allocation of RX shadow space failed.\n");
 		return -ENOMEM;
 	}
-	memset(qdev->rx_ring_shadow_reg_area, 0, PAGE_SIZE);
+
 	qdev->tx_ring_shadow_reg_area =
-	    pci_alloc_consistent(qdev->pdev, PAGE_SIZE,
-				 &qdev->tx_ring_shadow_reg_dma);
+		pci_zalloc_consistent(qdev->pdev, PAGE_SIZE,
+				      &qdev->tx_ring_shadow_reg_dma);
 	if (qdev->tx_ring_shadow_reg_area == NULL) {
 		netif_err(qdev, ifup, qdev->ndev,
 			  "Allocation of TX shadow space failed.\n");
 		goto err_wqp_sh_area;
 	}
-	memset(qdev->tx_ring_shadow_reg_area, 0, PAGE_SIZE);
 	return 0;
 
 err_wqp_sh_area:
diff --git a/drivers/net/irda/vlsi_ir.c b/drivers/net/irda/vlsi_ir.c
index 485006604bbc..58ef59469dd0 100644
--- a/drivers/net/irda/vlsi_ir.c
+++ b/drivers/net/irda/vlsi_ir.c
@@ -485,13 +485,13 @@ static int vlsi_create_hwif(vlsi_irda_dev_t *idev)
 	idev->virtaddr = NULL;
 	idev->busaddr = 0;
 
-	ringarea = pci_alloc_consistent(idev->pdev, HW_RING_AREA_SIZE, &idev->busaddr);
+	ringarea = pci_zalloc_consistent(idev->pdev, HW_RING_AREA_SIZE,
+					 &idev->busaddr);
 	if (!ringarea) {
 		IRDA_ERROR("%s: insufficient memory for descriptor rings\n",
 			   __func__);
 		goto out;
 	}
-	memset(ringarea, 0, HW_RING_AREA_SIZE);
 
 	hwmap = (struct ring_descr_hw *)ringarea;
 	idev->rx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[1],
diff --git a/drivers/net/wireless/ipw2x00/ipw2100.c b/drivers/net/wireless/ipw2x00/ipw2100.c
index dfc6dfc56d52..1ab8e500fb77 100644
--- a/drivers/net/wireless/ipw2x00/ipw2100.c
+++ b/drivers/net/wireless/ipw2x00/ipw2100.c
@@ -3449,8 +3449,9 @@ static int ipw2100_msg_allocate(struct ipw2100_priv *priv)
 		return -ENOMEM;
 
 	for (i = 0; i < IPW_COMMAND_POOL_SIZE; i++) {
-		v = pci_alloc_consistent(priv->pci_dev,
-					 sizeof(struct ipw2100_cmd_header), &p);
+		v = pci_zalloc_consistent(priv->pci_dev,
+					  sizeof(struct ipw2100_cmd_header),
+					  &p);
 		if (!v) {
 			printk(KERN_ERR DRV_NAME ": "
 			       "%s: PCI alloc failed for msg "
@@ -3459,8 +3460,6 @@ static int ipw2100_msg_allocate(struct ipw2100_priv *priv)
 			break;
 		}
 
-		memset(v, 0, sizeof(struct ipw2100_cmd_header));
-
 		priv->msg_buffers[i].type = COMMAND;
 		priv->msg_buffers[i].info.c_struct.cmd =
 		    (struct ipw2100_cmd_header *)v;
@@ -4336,16 +4335,12 @@ static int status_queue_allocate(struct ipw2100_priv *priv, int entries)
 	IPW_DEBUG_INFO("enter\n");
 
 	q->size = entries * sizeof(struct ipw2100_status);
-	q->drv =
-	    (struct ipw2100_status *)pci_alloc_consistent(priv->pci_dev,
-							  q->size, &q->nic);
+	q->drv = pci_zalloc_consistent(priv->pci_dev, q->size, &q->nic);
 	if (!q->drv) {
 		IPW_DEBUG_WARNING("Can not allocate status queue.\n");
 		return -ENOMEM;
 	}
 
-	memset(q->drv, 0, q->size);
-
 	IPW_DEBUG_INFO("exit\n");
 
 	return 0;
@@ -4374,13 +4369,12 @@ static int bd_queue_allocate(struct ipw2100_priv *priv,
 
 	q->entries = entries;
 	q->size = entries * sizeof(struct ipw2100_bd);
-	q->drv = pci_alloc_consistent(priv->pci_dev, q->size, &q->nic);
+	q->drv = pci_zalloc_consistent(priv->pci_dev, q->size, &q->nic);
 	if (!q->drv) {
 		IPW_DEBUG_INFO
 		    ("can't allocate shared memory for buffer descriptors\n");
 		return -ENOMEM;
 	}
-	memset(q->drv, 0, q->size);
 
 	IPW_DEBUG_INFO("exit\n");
 
diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c
index 9a3d4d6724f7..fc6cb215e761 100644
--- a/drivers/net/wireless/mwl8k.c
+++ b/drivers/net/wireless/mwl8k.c
@@ -1159,12 +1159,11 @@ static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
 
 	size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
 
-	rxq->rxd = pci_alloc_consistent(priv->pdev, size, &rxq->rxd_dma);
+	rxq->rxd = pci_zalloc_consistent(priv->pdev, size, &rxq->rxd_dma);
 	if (rxq->rxd == NULL) {
 		wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
 		return -ENOMEM;
 	}
-	memset(rxq->rxd, 0, size);
 
 	rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
 	if (rxq->buf == NULL) {
@@ -1451,12 +1450,11 @@ static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
 
 	size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
 
-	txq->txd = pci_alloc_consistent(priv->pdev, size, &txq->txd_dma);
+	txq->txd = pci_zalloc_consistent(priv->pdev, size, &txq->txd_dma);
 	if (txq->txd == NULL) {
 		wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
 		return -ENOMEM;
 	}
-	memset(txq->txd, 0, size);
 
 	txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
 	if (txq->skb == NULL) {
diff --git a/drivers/net/wireless/rtl818x/rtl8180/dev.c b/drivers/net/wireless/rtl818x/rtl8180/dev.c
index 4b904f708184..fcc45e5bf50a 100644
--- a/drivers/net/wireless/rtl818x/rtl8180/dev.c
+++ b/drivers/net/wireless/rtl818x/rtl8180/dev.c
@@ -972,16 +972,13 @@ static int rtl8180_init_rx_ring(struct ieee80211_hw *dev)
 	else
 		priv->rx_ring_sz = sizeof(struct rtl8180_rx_desc);
 
-	priv->rx_ring = pci_alloc_consistent(priv->pdev,
-					     priv->rx_ring_sz * 32,
-					     &priv->rx_ring_dma);
-
+	priv->rx_ring = pci_zalloc_consistent(priv->pdev, priv->rx_ring_sz * 32,
+					      &priv->rx_ring_dma);
 	if (!priv->rx_ring || (unsigned long)priv->rx_ring & 0xFF) {
 		wiphy_err(dev->wiphy, "Cannot allocate RX ring\n");
 		return -ENOMEM;
 	}
 
-	memset(priv->rx_ring, 0, priv->rx_ring_sz * 32);
 	priv->rx_idx = 0;
 
 	for (i = 0; i < 32; i++) {
@@ -1040,14 +1037,14 @@ static int rtl8180_init_tx_ring(struct ieee80211_hw *dev,
 	dma_addr_t dma;
 	int i;
 
-	ring = pci_alloc_consistent(priv->pdev, sizeof(*ring) * entries, &dma);
+	ring = pci_zalloc_consistent(priv->pdev, sizeof(*ring) * entries,
+				     &dma);
 	if (!ring || (unsigned long)ring & 0xFF) {
 		wiphy_err(dev->wiphy, "Cannot allocate TX ring (prio = %d)\n",
 			  prio);
 		return -ENOMEM;
 	}
 
-	memset(ring, 0, sizeof(*ring)*entries);
 	priv->tx_ring[prio].desc = ring;
 	priv->tx_ring[prio].dma = dma;
 	priv->tx_ring[prio].idx = 0;
diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c
index dae55257f0e8..67d1ee6edcad 100644
--- a/drivers/net/wireless/rtlwifi/pci.c
+++ b/drivers/net/wireless/rtlwifi/pci.c
@@ -1092,16 +1092,14 @@ static int _rtl_pci_init_tx_ring(struct ieee80211_hw *hw,
 	u32 nextdescaddress;
 	int i;
 
-	ring = pci_alloc_consistent(rtlpci->pdev,
-				    sizeof(*ring) * entries, &dma);
-
+	ring = pci_zalloc_consistent(rtlpci->pdev, sizeof(*ring) * entries,
+				     &dma);
 	if (!ring || (unsigned long)ring & 0xFF) {
 		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 			 "Cannot allocate TX ring (prio = %d)\n", prio);
 		return -ENOMEM;
 	}
 
-	memset(ring, 0, sizeof(*ring) * entries);
 	rtlpci->tx_ring[prio].desc = ring;
 	rtlpci->tx_ring[prio].dma = dma;
 	rtlpci->tx_ring[prio].idx = 0;
@@ -1139,10 +1137,9 @@ static int _rtl_pci_init_rx_ring(struct ieee80211_hw *hw)
 	for (rx_queue_idx = 0; rx_queue_idx < RTL_PCI_MAX_RX_QUEUE;
 	     rx_queue_idx++) {
 		rtlpci->rx_ring[rx_queue_idx].desc =
-		    pci_alloc_consistent(rtlpci->pdev,
-					 sizeof(*rtlpci->rx_ring[rx_queue_idx].
-						desc) * rtlpci->rxringcount,
-					 &rtlpci->rx_ring[rx_queue_idx].dma);
+			pci_zalloc_consistent(rtlpci->pdev,
+					      sizeof(*rtlpci->rx_ring[rx_queue_idx].desc) * rtlpci->rxringcount,
+					      &rtlpci->rx_ring[rx_queue_idx].dma);
 
 		if (!rtlpci->rx_ring[rx_queue_idx].desc ||
 		    (unsigned long)rtlpci->rx_ring[rx_queue_idx].desc & 0xFF) {
@@ -1151,10 +1148,6 @@ static int _rtl_pci_init_rx_ring(struct ieee80211_hw *hw)
 			return -ENOMEM;
 		}
 
-		memset(rtlpci->rx_ring[rx_queue_idx].desc, 0,
-		       sizeof(*rtlpci->rx_ring[rx_queue_idx].desc) *
-		       rtlpci->rxringcount);
-
 		rtlpci->rx_ring[rx_queue_idx].idx = 0;
 
 		/* If amsdu_8k is disabled, set buffersize to 4096. This
diff --git a/drivers/parport/parport_ip32.c b/drivers/parport/parport_ip32.c
index c864f82bd37d..30e981be14c2 100644
--- a/drivers/parport/parport_ip32.c
+++ b/drivers/parport/parport_ip32.c
@@ -2204,7 +2204,7 @@ static int __init parport_ip32_init(void)
 {
 	pr_info(PPIP32 "SGI IP32 built-in parallel port driver v0.6\n");
 	this_port = parport_ip32_probe_port();
-	return IS_ERR(this_port) ? PTR_ERR(this_port) : 0;
+	return PTR_ERR_OR_ZERO(this_port);
 }
 
 /**
diff --git a/drivers/rapidio/devices/tsi721.h b/drivers/rapidio/devices/tsi721.h
index 0305675270ee..a7b42680a06a 100644
--- a/drivers/rapidio/devices/tsi721.h
+++ b/drivers/rapidio/devices/tsi721.h
@@ -644,27 +644,26 @@ enum tsi721_smsg_int_flag {
 
 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
 
-#define TSI721_BDMA_BD_RING_SZ	128
 #define TSI721_BDMA_MAX_BCOUNT	(TSI721_DMAD_BCOUNT1 + 1)
 
 struct tsi721_tx_desc {
 	struct dma_async_tx_descriptor	txd;
-	struct tsi721_dma_desc		*hw_desc;
 	u16				destid;
 	/* low 64-bits of 66-bit RIO address */
 	u64				rio_addr;
 	/* upper 2-bits of 66-bit RIO address */
 	u8				rio_addr_u;
-	u32				bcount;
-	bool				interrupt;
+	enum dma_rtype			rtype;
 	struct list_head		desc_node;
-	struct list_head		tx_list;
+	struct scatterlist		*sg;
+	unsigned int			sg_len;
+	enum dma_status			status;
 };
 
 struct tsi721_bdma_chan {
 	int		id;
 	void __iomem	*regs;
-	int		bd_num;		/* number of buffer descriptors */
+	int		bd_num;		/* number of HW buffer descriptors */
 	void		*bd_base;	/* start of DMA descriptors */
 	dma_addr_t	bd_phys;
 	void		*sts_base;	/* start of DMA BD status FIFO */
@@ -680,7 +679,6 @@ struct tsi721_bdma_chan {
 	struct list_head	active_list;
 	struct list_head	queue;
 	struct list_head	free_list;
-	dma_cookie_t		completed_cookie;
 	struct tasklet_struct	tasklet;
 	bool			active;
 };
diff --git a/drivers/rapidio/devices/tsi721_dma.c b/drivers/rapidio/devices/tsi721_dma.c
index 44341dc5b148..f64c5decb747 100644
--- a/drivers/rapidio/devices/tsi721_dma.c
+++ b/drivers/rapidio/devices/tsi721_dma.c
@@ -1,7 +1,7 @@
 /*
  * DMA Engine support for Tsi721 PCIExpress-to-SRIO bridge
  *
- * Copyright 2011 Integrated Device Technology, Inc.
+ * Copyright (c) 2011-2014 Integrated Device Technology, Inc.
  * Alexandre Bounine <alexandre.bounine@idt.com>
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -14,9 +14,8 @@
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.
  *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ * The full GNU General Public License is included in this distribution in the
+ * file called COPYING.
  */
 
 #include <linux/io.h>
@@ -32,9 +31,22 @@
 #include <linux/interrupt.h>
 #include <linux/kfifo.h>
 #include <linux/delay.h>
+#include "../../dma/dmaengine.h"
 
 #include "tsi721.h"
 
+#define TSI721_DMA_TX_QUEUE_SZ	16	/* number of transaction descriptors */
+
+#ifdef CONFIG_PCI_MSI
+static irqreturn_t tsi721_bdma_msix(int irq, void *ptr);
+#endif
+static int tsi721_submit_sg(struct tsi721_tx_desc *desc);
+
+static unsigned int dma_desc_per_channel = 128;
+module_param(dma_desc_per_channel, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(dma_desc_per_channel,
+		 "Number of DMA descriptors per channel (default: 128)");
+
 static inline struct tsi721_bdma_chan *to_tsi721_chan(struct dma_chan *chan)
 {
 	return container_of(chan, struct tsi721_bdma_chan, dchan);
@@ -59,7 +71,7 @@ struct tsi721_tx_desc *tsi721_dma_first_active(
 				struct tsi721_tx_desc, desc_node);
 }
 
-static int tsi721_bdma_ch_init(struct tsi721_bdma_chan *bdma_chan)
+static int tsi721_bdma_ch_init(struct tsi721_bdma_chan *bdma_chan, int bd_num)
 {
 	struct tsi721_dma_desc *bd_ptr;
 	struct device *dev = bdma_chan->dchan.device->dev;
@@ -67,17 +79,23 @@ static int tsi721_bdma_ch_init(struct tsi721_bdma_chan *bdma_chan)
 	dma_addr_t	bd_phys;
 	dma_addr_t	sts_phys;
 	int		sts_size;
-	int		bd_num = bdma_chan->bd_num;
+#ifdef CONFIG_PCI_MSI
+	struct tsi721_device *priv = to_tsi721(bdma_chan->dchan.device);
+#endif
 
 	dev_dbg(dev, "Init Block DMA Engine, CH%d\n", bdma_chan->id);
 
-	/* Allocate space for DMA descriptors */
+	/*
+	 * Allocate space for DMA descriptors
+	 * (add an extra element for link descriptor)
+	 */
 	bd_ptr = dma_zalloc_coherent(dev,
-				bd_num * sizeof(struct tsi721_dma_desc),
+				(bd_num + 1) * sizeof(struct tsi721_dma_desc),
 				&bd_phys, GFP_KERNEL);
 	if (!bd_ptr)
 		return -ENOMEM;
 
+	bdma_chan->bd_num = bd_num;
 	bdma_chan->bd_phys = bd_phys;
 	bdma_chan->bd_base = bd_ptr;
 
@@ -85,8 +103,8 @@ static int tsi721_bdma_ch_init(struct tsi721_bdma_chan *bdma_chan)
 		bd_ptr, (unsigned long long)bd_phys);
 
 	/* Allocate space for descriptor status FIFO */
-	sts_size = (bd_num >= TSI721_DMA_MINSTSSZ) ?
-					bd_num : TSI721_DMA_MINSTSSZ;
+	sts_size = ((bd_num + 1) >= TSI721_DMA_MINSTSSZ) ?
+					(bd_num + 1) : TSI721_DMA_MINSTSSZ;
 	sts_size = roundup_pow_of_two(sts_size);
 	sts_ptr = dma_zalloc_coherent(dev,
 				     sts_size * sizeof(struct tsi721_dma_sts),
@@ -94,7 +112,7 @@ static int tsi721_bdma_ch_init(struct tsi721_bdma_chan *bdma_chan)
 	if (!sts_ptr) {
 		/* Free space allocated for DMA descriptors */
 		dma_free_coherent(dev,
-				  bd_num * sizeof(struct tsi721_dma_desc),
+				  (bd_num + 1) * sizeof(struct tsi721_dma_desc),
 				  bd_ptr, bd_phys);
 		bdma_chan->bd_base = NULL;
 		return -ENOMEM;
@@ -108,11 +126,11 @@ static int tsi721_bdma_ch_init(struct tsi721_bdma_chan *bdma_chan)
 		"desc status FIFO @ %p (phys = %llx) size=0x%x\n",
 		sts_ptr, (unsigned long long)sts_phys, sts_size);
 
-	/* Initialize DMA descriptors ring */
-	bd_ptr[bd_num - 1].type_id = cpu_to_le32(DTYPE3 << 29);
-	bd_ptr[bd_num - 1].next_lo = cpu_to_le32((u64)bd_phys &
+	/* Initialize DMA descriptors ring using added link descriptor */
+	bd_ptr[bd_num].type_id = cpu_to_le32(DTYPE3 << 29);
+	bd_ptr[bd_num].next_lo = cpu_to_le32((u64)bd_phys &
 						 TSI721_DMAC_DPTRL_MASK);
-	bd_ptr[bd_num - 1].next_hi = cpu_to_le32((u64)bd_phys >> 32);
+	bd_ptr[bd_num].next_hi = cpu_to_le32((u64)bd_phys >> 32);
 
 	/* Setup DMA descriptor pointers */
 	iowrite32(((u64)bd_phys >> 32),
@@ -134,6 +152,55 @@ static int tsi721_bdma_ch_init(struct tsi721_bdma_chan *bdma_chan)
 
 	ioread32(bdma_chan->regs + TSI721_DMAC_INT);
 
+#ifdef CONFIG_PCI_MSI
+	/* Request interrupt service if we are in MSI-X mode */
+	if (priv->flags & TSI721_USING_MSIX) {
+		int rc, idx;
+
+		idx = TSI721_VECT_DMA0_DONE + bdma_chan->id;
+
+		rc = request_irq(priv->msix[idx].vector, tsi721_bdma_msix, 0,
+				 priv->msix[idx].irq_name, (void *)bdma_chan);
+
+		if (rc) {
+			dev_dbg(dev, "Unable to get MSI-X for BDMA%d-DONE\n",
+				bdma_chan->id);
+			goto err_out;
+		}
+
+		idx = TSI721_VECT_DMA0_INT + bdma_chan->id;
+
+		rc = request_irq(priv->msix[idx].vector, tsi721_bdma_msix, 0,
+				priv->msix[idx].irq_name, (void *)bdma_chan);
+
+		if (rc)	{
+			dev_dbg(dev, "Unable to get MSI-X for BDMA%d-INT\n",
+				bdma_chan->id);
+			free_irq(
+				priv->msix[TSI721_VECT_DMA0_DONE +
+					    bdma_chan->id].vector,
+				(void *)bdma_chan);
+		}
+
+err_out:
+		if (rc) {
+			/* Free space allocated for DMA descriptors */
+			dma_free_coherent(dev,
+				(bd_num + 1) * sizeof(struct tsi721_dma_desc),
+				bd_ptr, bd_phys);
+			bdma_chan->bd_base = NULL;
+
+			/* Free space allocated for status descriptors */
+			dma_free_coherent(dev,
+				sts_size * sizeof(struct tsi721_dma_sts),
+				sts_ptr, sts_phys);
+			bdma_chan->sts_base = NULL;
+
+			return -EIO;
+		}
+	}
+#endif /* CONFIG_PCI_MSI */
+
 	/* Toggle DMA channel initialization */
 	iowrite32(TSI721_DMAC_CTL_INIT,	bdma_chan->regs + TSI721_DMAC_CTL);
 	ioread32(bdma_chan->regs + TSI721_DMAC_CTL);
@@ -147,6 +214,9 @@ static int tsi721_bdma_ch_init(struct tsi721_bdma_chan *bdma_chan)
 static int tsi721_bdma_ch_free(struct tsi721_bdma_chan *bdma_chan)
 {
 	u32 ch_stat;
+#ifdef CONFIG_PCI_MSI
+	struct tsi721_device *priv = to_tsi721(bdma_chan->dchan.device);
+#endif
 
 	if (bdma_chan->bd_base == NULL)
 		return 0;
@@ -159,9 +229,18 @@ static int tsi721_bdma_ch_free(struct tsi721_bdma_chan *bdma_chan)
 	/* Put DMA channel into init state */
 	iowrite32(TSI721_DMAC_CTL_INIT,	bdma_chan->regs + TSI721_DMAC_CTL);
 
+#ifdef CONFIG_PCI_MSI
+	if (priv->flags & TSI721_USING_MSIX) {
+		free_irq(priv->msix[TSI721_VECT_DMA0_DONE +
+				    bdma_chan->id].vector, (void *)bdma_chan);
+		free_irq(priv->msix[TSI721_VECT_DMA0_INT +
+				    bdma_chan->id].vector, (void *)bdma_chan);
+	}
+#endif /* CONFIG_PCI_MSI */
+
 	/* Free space allocated for DMA descriptors */
 	dma_free_coherent(bdma_chan->dchan.device->dev,
-		bdma_chan->bd_num * sizeof(struct tsi721_dma_desc),
+		(bdma_chan->bd_num + 1) * sizeof(struct tsi721_dma_desc),
 		bdma_chan->bd_base, bdma_chan->bd_phys);
 	bdma_chan->bd_base = NULL;
 
@@ -243,8 +322,8 @@ static void tsi721_start_dma(struct tsi721_bdma_chan *bdma_chan)
 	}
 
 	dev_dbg(bdma_chan->dchan.device->dev,
-		"tx_chan: %p, chan: %d, regs: %p\n",
-		bdma_chan, bdma_chan->dchan.chan_id, bdma_chan->regs);
+		"%s: chan_%d (wrc=%d)\n", __func__, bdma_chan->id,
+		bdma_chan->wr_count_next);
 
 	iowrite32(bdma_chan->wr_count_next,
 		bdma_chan->regs + TSI721_DMAC_DWRCNT);
@@ -253,72 +332,19 @@ static void tsi721_start_dma(struct tsi721_bdma_chan *bdma_chan)
 	bdma_chan->wr_count = bdma_chan->wr_count_next;
 }
 
-static void tsi721_desc_put(struct tsi721_bdma_chan *bdma_chan,
-			    struct tsi721_tx_desc *desc)
-{
-	dev_dbg(bdma_chan->dchan.device->dev,
-		"Put desc: %p into free list\n", desc);
-
-	if (desc) {
-		spin_lock_bh(&bdma_chan->lock);
-		list_splice_init(&desc->tx_list, &bdma_chan->free_list);
-		list_add(&desc->desc_node, &bdma_chan->free_list);
-		bdma_chan->wr_count_next = bdma_chan->wr_count;
-		spin_unlock_bh(&bdma_chan->lock);
-	}
-}
-
-static
-struct tsi721_tx_desc *tsi721_desc_get(struct tsi721_bdma_chan *bdma_chan)
-{
-	struct tsi721_tx_desc *tx_desc, *_tx_desc;
-	struct tsi721_tx_desc *ret = NULL;
-	int i;
-
-	spin_lock_bh(&bdma_chan->lock);
-	list_for_each_entry_safe(tx_desc, _tx_desc,
-				 &bdma_chan->free_list, desc_node) {
-		if (async_tx_test_ack(&tx_desc->txd)) {
-			list_del(&tx_desc->desc_node);
-			ret = tx_desc;
-			break;
-		}
-		dev_dbg(bdma_chan->dchan.device->dev,
-			"desc %p not ACKed\n", tx_desc);
-	}
-
-	if (ret == NULL) {
-		dev_dbg(bdma_chan->dchan.device->dev,
-			"%s: unable to obtain tx descriptor\n", __func__);
-		goto err_out;
-	}
-
-	i = bdma_chan->wr_count_next % bdma_chan->bd_num;
-	if (i == bdma_chan->bd_num - 1) {
-		i = 0;
-		bdma_chan->wr_count_next++; /* skip link descriptor */
-	}
-
-	bdma_chan->wr_count_next++;
-	tx_desc->txd.phys = bdma_chan->bd_phys +
-				i * sizeof(struct tsi721_dma_desc);
-	tx_desc->hw_desc = &((struct tsi721_dma_desc *)bdma_chan->bd_base)[i];
-err_out:
-	spin_unlock_bh(&bdma_chan->lock);
-
-	return ret;
-}
-
 static int
-tsi721_desc_fill_init(struct tsi721_tx_desc *desc, struct scatterlist *sg,
-	enum dma_rtype rtype, u32 sys_size)
+tsi721_desc_fill_init(struct tsi721_tx_desc *desc,
+		      struct tsi721_dma_desc *bd_ptr,
+		      struct scatterlist *sg, u32 sys_size)
 {
-	struct tsi721_dma_desc *bd_ptr = desc->hw_desc;
 	u64 rio_addr;
 
+	if (bd_ptr == NULL)
+		return -EINVAL;
+
 	/* Initialize DMA descriptor */
 	bd_ptr->type_id = cpu_to_le32((DTYPE1 << 29) |
-					(rtype << 19) | desc->destid);
+				      (desc->rtype << 19) | desc->destid);
 	bd_ptr->bcount = cpu_to_le32(((desc->rio_addr & 0x3) << 30) |
 				     (sys_size << 26));
 	rio_addr = (desc->rio_addr >> 2) |
@@ -335,51 +361,32 @@ tsi721_desc_fill_init(struct tsi721_tx_desc *desc, struct scatterlist *sg,
 }
 
 static int
-tsi721_desc_fill_end(struct tsi721_tx_desc *desc)
+tsi721_desc_fill_end(struct tsi721_dma_desc *bd_ptr, u32 bcount, bool interrupt)
 {
-	struct tsi721_dma_desc *bd_ptr = desc->hw_desc;
+	if (bd_ptr == NULL)
+		return -EINVAL;
 
 	/* Update DMA descriptor */
-	if (desc->interrupt)
+	if (interrupt)
 		bd_ptr->type_id |= cpu_to_le32(TSI721_DMAD_IOF);
-	bd_ptr->bcount |= cpu_to_le32(desc->bcount & TSI721_DMAD_BCOUNT1);
+	bd_ptr->bcount |= cpu_to_le32(bcount & TSI721_DMAD_BCOUNT1);
 
 	return 0;
 }
 
-
-static void tsi721_dma_chain_complete(struct tsi721_bdma_chan *bdma_chan,
-				      struct tsi721_tx_desc *desc)
+static void tsi721_dma_tx_err(struct tsi721_bdma_chan *bdma_chan,
+			      struct tsi721_tx_desc *desc)
 {
 	struct dma_async_tx_descriptor *txd = &desc->txd;
 	dma_async_tx_callback callback = txd->callback;
 	void *param = txd->callback_param;
 
-	list_splice_init(&desc->tx_list, &bdma_chan->free_list);
 	list_move(&desc->desc_node, &bdma_chan->free_list);
-	bdma_chan->completed_cookie = txd->cookie;
 
 	if (callback)
 		callback(param);
 }
 
-static void tsi721_dma_complete_all(struct tsi721_bdma_chan *bdma_chan)
-{
-	struct tsi721_tx_desc *desc, *_d;
-	LIST_HEAD(list);
-
-	BUG_ON(!tsi721_dma_is_idle(bdma_chan));
-
-	if (!list_empty(&bdma_chan->queue))
-		tsi721_start_dma(bdma_chan);
-
-	list_splice_init(&bdma_chan->active_list, &list);
-	list_splice_init(&bdma_chan->queue, &bdma_chan->active_list);
-
-	list_for_each_entry_safe(desc, _d, &list, desc_node)
-		tsi721_dma_chain_complete(bdma_chan, desc);
-}
-
 static void tsi721_clr_stat(struct tsi721_bdma_chan *bdma_chan)
 {
 	u32 srd_ptr;
@@ -403,20 +410,159 @@ static void tsi721_clr_stat(struct tsi721_bdma_chan *bdma_chan)
 	bdma_chan->sts_rdptr = srd_ptr;
 }
 
+/* Must be called with the channel spinlock held */
+static int tsi721_submit_sg(struct tsi721_tx_desc *desc)
+{
+	struct dma_chan *dchan = desc->txd.chan;
+	struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan);
+	u32 sys_size;
+	u64 rio_addr;
+	dma_addr_t next_addr;
+	u32 bcount;
+	struct scatterlist *sg;
+	unsigned int i;
+	int err = 0;
+	struct tsi721_dma_desc *bd_ptr = NULL;
+	u32 idx, rd_idx;
+	u32 add_count = 0;
+
+	if (!tsi721_dma_is_idle(bdma_chan)) {
+		dev_err(bdma_chan->dchan.device->dev,
+			"BUG: Attempt to use non-idle channel\n");
+		return -EIO;
+	}
+
+	/*
+	 * Fill DMA channel's hardware buffer descriptors.
+	 * (NOTE: RapidIO destination address is limited to 64 bits for now)
+	 */
+	rio_addr = desc->rio_addr;
+	next_addr = -1;
+	bcount = 0;
+	sys_size = dma_to_mport(bdma_chan->dchan.device)->sys_size;
+
+	rd_idx = ioread32(bdma_chan->regs + TSI721_DMAC_DRDCNT);
+	rd_idx %= (bdma_chan->bd_num + 1);
+
+	idx = bdma_chan->wr_count_next % (bdma_chan->bd_num + 1);
+	if (idx == bdma_chan->bd_num) {
+		/* wrap around link descriptor */
+		idx = 0;
+		add_count++;
+	}
+
+	dev_dbg(dchan->device->dev, "%s: BD ring status: rdi=%d wri=%d\n",
+		__func__, rd_idx, idx);
+
+	for_each_sg(desc->sg, sg, desc->sg_len, i) {
+
+		dev_dbg(dchan->device->dev, "sg%d/%d addr: 0x%llx len: %d\n",
+			i, desc->sg_len,
+			(unsigned long long)sg_dma_address(sg), sg_dma_len(sg));
+
+		if (sg_dma_len(sg) > TSI721_BDMA_MAX_BCOUNT) {
+			dev_err(dchan->device->dev,
+				"%s: SG entry %d is too large\n", __func__, i);
+			err = -EINVAL;
+			break;
+		}
+
+		/*
+		 * If this sg entry forms contiguous block with previous one,
+		 * try to merge it into existing DMA descriptor
+		 */
+		if (next_addr == sg_dma_address(sg) &&
+		    bcount + sg_dma_len(sg) <= TSI721_BDMA_MAX_BCOUNT) {
+			/* Adjust byte count of the descriptor */
+			bcount += sg_dma_len(sg);
+			goto entry_done;
+		} else if (next_addr != -1) {
+			/* Finalize descriptor using total byte count value */
+			tsi721_desc_fill_end(bd_ptr, bcount, 0);
+			dev_dbg(dchan->device->dev,
+				"%s: prev desc final len: %d\n",
+				__func__, bcount);
+		}
+
+		desc->rio_addr = rio_addr;
+
+		if (i && idx == rd_idx) {
+			dev_dbg(dchan->device->dev,
+				"%s: HW descriptor ring is full @ %d\n",
+				__func__, i);
+			desc->sg = sg;
+			desc->sg_len -= i;
+			break;
+		}
+
+		bd_ptr = &((struct tsi721_dma_desc *)bdma_chan->bd_base)[idx];
+		err = tsi721_desc_fill_init(desc, bd_ptr, sg, sys_size);
+		if (err) {
+			dev_err(dchan->device->dev,
+				"Failed to build desc: err=%d\n", err);
+			break;
+		}
+
+		dev_dbg(dchan->device->dev, "bd_ptr = %p did=%d raddr=0x%llx\n",
+			bd_ptr, desc->destid, desc->rio_addr);
+
+		next_addr = sg_dma_address(sg);
+		bcount = sg_dma_len(sg);
+
+		add_count++;
+		if (++idx == bdma_chan->bd_num) {
+			/* wrap around link descriptor */
+			idx = 0;
+			add_count++;
+		}
+
+entry_done:
+		if (sg_is_last(sg)) {
+			tsi721_desc_fill_end(bd_ptr, bcount, 0);
+			dev_dbg(dchan->device->dev, "%s: last desc final len: %d\n",
+				__func__, bcount);
+			desc->sg_len = 0;
+		} else {
+			rio_addr += sg_dma_len(sg);
+			next_addr += sg_dma_len(sg);
+		}
+	}
+
+	if (!err)
+		bdma_chan->wr_count_next += add_count;
+
+	return err;
+}
+
 static void tsi721_advance_work(struct tsi721_bdma_chan *bdma_chan)
 {
-	if (list_empty(&bdma_chan->active_list) ||
-		list_is_singular(&bdma_chan->active_list)) {
-		dev_dbg(bdma_chan->dchan.device->dev,
-			"%s: Active_list empty\n", __func__);
-		tsi721_dma_complete_all(bdma_chan);
-	} else {
-		dev_dbg(bdma_chan->dchan.device->dev,
-			"%s: Active_list NOT empty\n", __func__);
-		tsi721_dma_chain_complete(bdma_chan,
-					tsi721_dma_first_active(bdma_chan));
-		tsi721_start_dma(bdma_chan);
+	struct tsi721_tx_desc *desc;
+	int err;
+
+	dev_dbg(bdma_chan->dchan.device->dev, "%s: Enter\n", __func__);
+
+	/*
+	 * If there are any new transactions in the queue add them
+	 * into the processing list
+	 */
+	if (!list_empty(&bdma_chan->queue))
+		list_splice_init(&bdma_chan->queue, &bdma_chan->active_list);
+
+	/* Start new transaction (if available) */
+	if (!list_empty(&bdma_chan->active_list)) {
+		desc = tsi721_dma_first_active(bdma_chan);
+		err = tsi721_submit_sg(desc);
+		if (!err)
+			tsi721_start_dma(bdma_chan);
+		else {
+			tsi721_dma_tx_err(bdma_chan, desc);
+			dev_dbg(bdma_chan->dchan.device->dev,
+				"ERR: tsi721_submit_sg failed with err=%d\n",
+				err);
+		}
 	}
+
+	dev_dbg(bdma_chan->dchan.device->dev, "%s: Exit\n", __func__);
 }
 
 static void tsi721_dma_tasklet(unsigned long data)
@@ -444,8 +590,29 @@ static void tsi721_dma_tasklet(unsigned long data)
 	}
 
 	if (dmac_int & (TSI721_DMAC_INT_DONE | TSI721_DMAC_INT_IOFDONE)) {
+		struct tsi721_tx_desc *desc;
+
 		tsi721_clr_stat(bdma_chan);
 		spin_lock(&bdma_chan->lock);
+		desc = tsi721_dma_first_active(bdma_chan);
+
+		if (desc->sg_len == 0) {
+			dma_async_tx_callback callback = NULL;
+			void *param = NULL;
+
+			desc->status = DMA_COMPLETE;
+			dma_cookie_complete(&desc->txd);
+			if (desc->txd.flags & DMA_PREP_INTERRUPT) {
+				callback = desc->txd.callback;
+				param = desc->txd.callback_param;
+			}
+			list_move(&desc->desc_node, &bdma_chan->free_list);
+			spin_unlock(&bdma_chan->lock);
+			if (callback)
+				callback(param);
+			spin_lock(&bdma_chan->lock);
+		}
+
 		tsi721_advance_work(bdma_chan);
 		spin_unlock(&bdma_chan->lock);
 	}
@@ -460,21 +627,24 @@ static dma_cookie_t tsi721_tx_submit(struct dma_async_tx_descriptor *txd)
 	struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(txd->chan);
 	dma_cookie_t cookie;
 
-	spin_lock_bh(&bdma_chan->lock);
+	/* Check if the descriptor is detached from any lists */
+	if (!list_empty(&desc->desc_node)) {
+		dev_err(bdma_chan->dchan.device->dev,
+			"%s: wrong state of descriptor %p\n", __func__, txd);
+		return -EIO;
+	}
 
-	cookie = txd->chan->cookie;
-	if (++cookie < 0)
-		cookie = 1;
-	txd->chan->cookie = cookie;
-	txd->cookie = cookie;
+	spin_lock_bh(&bdma_chan->lock);
 
-	if (list_empty(&bdma_chan->active_list)) {
-		list_add_tail(&desc->desc_node, &bdma_chan->active_list);
-		tsi721_start_dma(bdma_chan);
-	} else {
-		list_add_tail(&desc->desc_node, &bdma_chan->queue);
+	if (!bdma_chan->active) {
+		spin_unlock_bh(&bdma_chan->lock);
+		return -ENODEV;
 	}
 
+	cookie = dma_cookie_assign(txd);
+	desc->status = DMA_IN_PROGRESS;
+	list_add_tail(&desc->desc_node, &bdma_chan->queue);
+
 	spin_unlock_bh(&bdma_chan->lock);
 	return cookie;
 }
@@ -482,115 +652,52 @@ static dma_cookie_t tsi721_tx_submit(struct dma_async_tx_descriptor *txd)
 static int tsi721_alloc_chan_resources(struct dma_chan *dchan)
 {
 	struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan);
-#ifdef CONFIG_PCI_MSI
-	struct tsi721_device *priv = to_tsi721(dchan->device);
-#endif
 	struct tsi721_tx_desc *desc = NULL;
-	LIST_HEAD(tmp_list);
 	int i;
-	int rc;
+
+	dev_dbg(dchan->device->dev, "%s: for channel %d\n",
+		__func__, bdma_chan->id);
 
 	if (bdma_chan->bd_base)
-		return bdma_chan->bd_num - 1;
+		return TSI721_DMA_TX_QUEUE_SZ;
 
 	/* Initialize BDMA channel */
-	if (tsi721_bdma_ch_init(bdma_chan)) {
+	if (tsi721_bdma_ch_init(bdma_chan, dma_desc_per_channel)) {
 		dev_err(dchan->device->dev, "Unable to initialize data DMA"
 			" channel %d, aborting\n", bdma_chan->id);
-		return -ENOMEM;
+		return -ENODEV;
 	}
 
-	/* Alocate matching number of logical descriptors */
-	desc = kcalloc((bdma_chan->bd_num - 1), sizeof(struct tsi721_tx_desc),
+	/* Allocate queue of transaction descriptors */
+	desc = kcalloc(TSI721_DMA_TX_QUEUE_SZ, sizeof(struct tsi721_tx_desc),
 			GFP_KERNEL);
 	if (!desc) {
 		dev_err(dchan->device->dev,
 			"Failed to allocate logical descriptors\n");
-		rc = -ENOMEM;
-		goto err_out;
+		tsi721_bdma_ch_free(bdma_chan);
+		return -ENOMEM;
 	}
 
 	bdma_chan->tx_desc = desc;
 
-	for (i = 0; i < bdma_chan->bd_num - 1; i++) {
+	for (i = 0; i < TSI721_DMA_TX_QUEUE_SZ; i++) {
 		dma_async_tx_descriptor_init(&desc[i].txd, dchan);
 		desc[i].txd.tx_submit = tsi721_tx_submit;
 		desc[i].txd.flags = DMA_CTRL_ACK;
-		INIT_LIST_HEAD(&desc[i].tx_list);
-		list_add_tail(&desc[i].desc_node, &tmp_list);
+		list_add(&desc[i].desc_node, &bdma_chan->free_list);
 	}
 
-	spin_lock_bh(&bdma_chan->lock);
-	list_splice(&tmp_list, &bdma_chan->free_list);
-	bdma_chan->completed_cookie = dchan->cookie = 1;
-	spin_unlock_bh(&bdma_chan->lock);
-
-#ifdef CONFIG_PCI_MSI
-	if (priv->flags & TSI721_USING_MSIX) {
-		/* Request interrupt service if we are in MSI-X mode */
-		rc = request_irq(
-			priv->msix[TSI721_VECT_DMA0_DONE +
-				   bdma_chan->id].vector,
-			tsi721_bdma_msix, 0,
-			priv->msix[TSI721_VECT_DMA0_DONE +
-				   bdma_chan->id].irq_name,
-			(void *)bdma_chan);
-
-		if (rc) {
-			dev_dbg(dchan->device->dev,
-				"Unable to allocate MSI-X interrupt for "
-				"BDMA%d-DONE\n", bdma_chan->id);
-			goto err_out;
-		}
-
-		rc = request_irq(priv->msix[TSI721_VECT_DMA0_INT +
-					    bdma_chan->id].vector,
-				tsi721_bdma_msix, 0,
-				priv->msix[TSI721_VECT_DMA0_INT +
-					   bdma_chan->id].irq_name,
-				(void *)bdma_chan);
-
-		if (rc)	{
-			dev_dbg(dchan->device->dev,
-				"Unable to allocate MSI-X interrupt for "
-				"BDMA%d-INT\n", bdma_chan->id);
-			free_irq(
-				priv->msix[TSI721_VECT_DMA0_DONE +
-					   bdma_chan->id].vector,
-				(void *)bdma_chan);
-			rc = -EIO;
-			goto err_out;
-		}
-	}
-#endif /* CONFIG_PCI_MSI */
+	dma_cookie_init(dchan);
 
 	bdma_chan->active = true;
 	tsi721_bdma_interrupt_enable(bdma_chan, 1);
 
-	return bdma_chan->bd_num - 1;
-
-err_out:
-	kfree(desc);
-	tsi721_bdma_ch_free(bdma_chan);
-	return rc;
+	return TSI721_DMA_TX_QUEUE_SZ;
 }
 
-static void tsi721_free_chan_resources(struct dma_chan *dchan)
+static void tsi721_sync_dma_irq(struct tsi721_bdma_chan *bdma_chan)
 {
-	struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan);
-	struct tsi721_device *priv = to_tsi721(dchan->device);
-	LIST_HEAD(list);
-
-	dev_dbg(dchan->device->dev, "%s: Entry\n", __func__);
-
-	if (bdma_chan->bd_base == NULL)
-		return;
-
-	BUG_ON(!list_empty(&bdma_chan->active_list));
-	BUG_ON(!list_empty(&bdma_chan->queue));
-
-	tsi721_bdma_interrupt_enable(bdma_chan, 0);
-	bdma_chan->active = false;
+	struct tsi721_device *priv = to_tsi721(bdma_chan->dchan.device);
 
 #ifdef CONFIG_PCI_MSI
 	if (priv->flags & TSI721_USING_MSIX) {
@@ -601,64 +708,48 @@ static void tsi721_free_chan_resources(struct dma_chan *dchan)
 	} else
 #endif
 	synchronize_irq(priv->pdev->irq);
+}
 
-	tasklet_kill(&bdma_chan->tasklet);
+static void tsi721_free_chan_resources(struct dma_chan *dchan)
+{
+	struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan);
 
-	spin_lock_bh(&bdma_chan->lock);
-	list_splice_init(&bdma_chan->free_list, &list);
-	spin_unlock_bh(&bdma_chan->lock);
+	dev_dbg(dchan->device->dev, "%s: for channel %d\n",
+		__func__, bdma_chan->id);
 
-#ifdef CONFIG_PCI_MSI
-	if (priv->flags & TSI721_USING_MSIX) {
-		free_irq(priv->msix[TSI721_VECT_DMA0_DONE +
-				    bdma_chan->id].vector, (void *)bdma_chan);
-		free_irq(priv->msix[TSI721_VECT_DMA0_INT +
-				    bdma_chan->id].vector, (void *)bdma_chan);
-	}
-#endif /* CONFIG_PCI_MSI */
+	if (bdma_chan->bd_base == NULL)
+		return;
 
-	tsi721_bdma_ch_free(bdma_chan);
+	BUG_ON(!list_empty(&bdma_chan->active_list));
+	BUG_ON(!list_empty(&bdma_chan->queue));
+
+	tsi721_bdma_interrupt_enable(bdma_chan, 0);
+	bdma_chan->active = false;
+	tsi721_sync_dma_irq(bdma_chan);
+	tasklet_kill(&bdma_chan->tasklet);
+	INIT_LIST_HEAD(&bdma_chan->free_list);
 	kfree(bdma_chan->tx_desc);
+	tsi721_bdma_ch_free(bdma_chan);
 }
 
 static
 enum dma_status tsi721_tx_status(struct dma_chan *dchan, dma_cookie_t cookie,
 				 struct dma_tx_state *txstate)
 {
-	struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan);
-	dma_cookie_t		last_used;
-	dma_cookie_t		last_completed;
-	int			ret;
-
-	spin_lock_bh(&bdma_chan->lock);
-	last_completed = bdma_chan->completed_cookie;
-	last_used = dchan->cookie;
-	spin_unlock_bh(&bdma_chan->lock);
-
-	ret = dma_async_is_complete(cookie, last_completed, last_used);
-
-	dma_set_tx_state(txstate, last_completed, last_used, 0);
-
-	dev_dbg(dchan->device->dev,
-		"%s: exit, ret: %d, last_completed: %d, last_used: %d\n",
-		__func__, ret, last_completed, last_used);
-
-	return ret;
+	return dma_cookie_status(dchan, cookie, txstate);
 }
 
 static void tsi721_issue_pending(struct dma_chan *dchan)
 {
 	struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan);
 
-	dev_dbg(dchan->device->dev, "%s: Entry\n", __func__);
+	dev_dbg(dchan->device->dev, "%s: Enter\n", __func__);
 
-	if (tsi721_dma_is_idle(bdma_chan)) {
+	if (tsi721_dma_is_idle(bdma_chan) && bdma_chan->active) {
 		spin_lock_bh(&bdma_chan->lock);
 		tsi721_advance_work(bdma_chan);
 		spin_unlock_bh(&bdma_chan->lock);
-	} else
-		dev_dbg(dchan->device->dev,
-			"%s: DMA channel still busy\n", __func__);
+	}
 }
 
 static
@@ -668,21 +759,19 @@ struct dma_async_tx_descriptor *tsi721_prep_rio_sg(struct dma_chan *dchan,
 			void *tinfo)
 {
 	struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan);
-	struct tsi721_tx_desc *desc = NULL;
-	struct tsi721_tx_desc *first = NULL;
-	struct scatterlist *sg;
+	struct tsi721_tx_desc *desc, *_d;
 	struct rio_dma_ext *rext = tinfo;
-	u64 rio_addr = rext->rio_addr; /* limited to 64-bit rio_addr for now */
-	unsigned int i;
-	u32 sys_size = dma_to_mport(dchan->device)->sys_size;
 	enum dma_rtype rtype;
-	dma_addr_t next_addr = -1;
+	struct dma_async_tx_descriptor *txd = NULL;
 
 	if (!sgl || !sg_len) {
 		dev_err(dchan->device->dev, "%s: No SG list\n", __func__);
 		return NULL;
 	}
 
+	dev_dbg(dchan->device->dev, "%s: %s\n", __func__,
+		(dir == DMA_DEV_TO_MEM)?"READ":"WRITE");
+
 	if (dir == DMA_DEV_TO_MEM)
 		rtype = NREAD;
 	else if (dir == DMA_MEM_TO_DEV) {
@@ -704,97 +793,26 @@ struct dma_async_tx_descriptor *tsi721_prep_rio_sg(struct dma_chan *dchan,
 		return NULL;
 	}
 
-	for_each_sg(sgl, sg, sg_len, i) {
-		int err;
-
-		if (sg_dma_len(sg) > TSI721_BDMA_MAX_BCOUNT) {
-			dev_err(dchan->device->dev,
-				"%s: SG entry %d is too large\n", __func__, i);
-			goto err_desc_put;
-		}
-
-		/*
-		 * If this sg entry forms contiguous block with previous one,
-		 * try to merge it into existing DMA descriptor
-		 */
-		if (desc) {
-			if (next_addr == sg_dma_address(sg) &&
-			    desc->bcount + sg_dma_len(sg) <=
-						TSI721_BDMA_MAX_BCOUNT) {
-				/* Adjust byte count of the descriptor */
-				desc->bcount += sg_dma_len(sg);
-				goto entry_done;
-			}
-
-			/*
-			 * Finalize this descriptor using total
-			 * byte count value.
-			 */
-			tsi721_desc_fill_end(desc);
-			dev_dbg(dchan->device->dev, "%s: desc final len: %d\n",
-				__func__, desc->bcount);
-		}
-
-		/*
-		 * Obtain and initialize a new descriptor
-		 */
-		desc = tsi721_desc_get(bdma_chan);
-		if (!desc) {
-			dev_err(dchan->device->dev,
-				"%s: Failed to get new descriptor for SG %d\n",
-				__func__, i);
-			goto err_desc_put;
-		}
-
-		desc->destid = rext->destid;
-		desc->rio_addr = rio_addr;
-		desc->rio_addr_u = 0;
-		desc->bcount = sg_dma_len(sg);
-
-		dev_dbg(dchan->device->dev,
-			"sg%d desc: 0x%llx, addr: 0x%llx len: %d\n",
-			i, (u64)desc->txd.phys,
-			(unsigned long long)sg_dma_address(sg),
-			sg_dma_len(sg));
-
-		dev_dbg(dchan->device->dev,
-			"bd_ptr = %p did=%d raddr=0x%llx\n",
-			desc->hw_desc, desc->destid, desc->rio_addr);
-
-		err = tsi721_desc_fill_init(desc, sg, rtype, sys_size);
-		if (err) {
-			dev_err(dchan->device->dev,
-				"Failed to build desc: %d\n", err);
-			goto err_desc_put;
-		}
-
-		next_addr = sg_dma_address(sg);
-
-		if (!first)
-			first = desc;
-		else
-			list_add_tail(&desc->desc_node, &first->tx_list);
+	spin_lock_bh(&bdma_chan->lock);
 
-entry_done:
-		if (sg_is_last(sg)) {
-			desc->interrupt = (flags & DMA_PREP_INTERRUPT) != 0;
-			tsi721_desc_fill_end(desc);
-			dev_dbg(dchan->device->dev, "%s: desc final len: %d\n",
-				__func__, desc->bcount);
-		} else {
-			rio_addr += sg_dma_len(sg);
-			next_addr += sg_dma_len(sg);
+	list_for_each_entry_safe(desc, _d, &bdma_chan->free_list, desc_node) {
+		if (async_tx_test_ack(&desc->txd)) {
+			list_del_init(&desc->desc_node);
+			desc->destid = rext->destid;
+			desc->rio_addr = rext->rio_addr;
+			desc->rio_addr_u = 0;
+			desc->rtype = rtype;
+			desc->sg_len	= sg_len;
+			desc->sg	= sgl;
+			txd		= &desc->txd;
+			txd->flags	= flags;
+			break;
 		}
 	}
 
-	first->txd.cookie = -EBUSY;
-	desc->txd.flags = flags;
-
-	return &first->txd;
+	spin_unlock_bh(&bdma_chan->lock);
 
-err_desc_put:
-	tsi721_desc_put(bdma_chan, first);
-	return NULL;
+	return txd;
 }
 
 static int tsi721_device_control(struct dma_chan *dchan, enum dma_ctrl_cmd cmd,
@@ -802,23 +820,34 @@ static int tsi721_device_control(struct dma_chan *dchan, enum dma_ctrl_cmd cmd,
 {
 	struct tsi721_bdma_chan *bdma_chan = to_tsi721_chan(dchan);
 	struct tsi721_tx_desc *desc, *_d;
+	u32 dmac_int;
 	LIST_HEAD(list);
 
 	dev_dbg(dchan->device->dev, "%s: Entry\n", __func__);
 
 	if (cmd != DMA_TERMINATE_ALL)
-		return -ENXIO;
+		return -ENOSYS;
 
 	spin_lock_bh(&bdma_chan->lock);
 
-	/* make sure to stop the transfer */
-	iowrite32(TSI721_DMAC_CTL_SUSP, bdma_chan->regs + TSI721_DMAC_CTL);
+	bdma_chan->active = false;
+
+	if (!tsi721_dma_is_idle(bdma_chan)) {
+		/* make sure to stop the transfer */
+		iowrite32(TSI721_DMAC_CTL_SUSP,
+			  bdma_chan->regs + TSI721_DMAC_CTL);
+
+		/* Wait until DMA channel stops */
+		do {
+			dmac_int = ioread32(bdma_chan->regs + TSI721_DMAC_INT);
+		} while ((dmac_int & TSI721_DMAC_INT_SUSP) == 0);
+	}
 
 	list_splice_init(&bdma_chan->active_list, &list);
 	list_splice_init(&bdma_chan->queue, &list);
 
 	list_for_each_entry_safe(desc, _d, &list, desc_node)
-		tsi721_dma_chain_complete(bdma_chan, desc);
+		tsi721_dma_tx_err(bdma_chan, desc);
 
 	spin_unlock_bh(&bdma_chan->lock);
 
@@ -828,22 +857,18 @@ static int tsi721_device_control(struct dma_chan *dchan, enum dma_ctrl_cmd cmd,
 int tsi721_register_dma(struct tsi721_device *priv)
 {
 	int i;
-	int nr_channels = TSI721_DMA_MAXCH;
+	int nr_channels = 0;
 	int err;
 	struct rio_mport *mport = priv->mport;
 
-	mport->dma.dev = &priv->pdev->dev;
-	mport->dma.chancnt = nr_channels;
-
 	INIT_LIST_HEAD(&mport->dma.channels);
 
-	for (i = 0; i < nr_channels; i++) {
+	for (i = 0; i < TSI721_DMA_MAXCH; i++) {
 		struct tsi721_bdma_chan *bdma_chan = &priv->bdma[i];
 
 		if (i == TSI721_DMACH_MAINT)
 			continue;
 
-		bdma_chan->bd_num = TSI721_BDMA_BD_RING_SZ;
 		bdma_chan->regs = priv->regs + TSI721_DMAC_BASE(i);
 
 		bdma_chan->dchan.device = &mport->dma;
@@ -862,12 +887,15 @@ int tsi721_register_dma(struct tsi721_device *priv)
 			     (unsigned long)bdma_chan);
 		list_add_tail(&bdma_chan->dchan.device_node,
 			      &mport->dma.channels);
+		nr_channels++;
 	}
 
+	mport->dma.chancnt = nr_channels;
 	dma_cap_zero(mport->dma.cap_mask);
 	dma_cap_set(DMA_PRIVATE, mport->dma.cap_mask);
 	dma_cap_set(DMA_SLAVE, mport->dma.cap_mask);
 
+	mport->dma.dev = &priv->pdev->dev;
 	mport->dma.device_alloc_chan_resources = tsi721_alloc_chan_resources;
 	mport->dma.device_free_chan_resources = tsi721_free_chan_resources;
 	mport->dma.device_tx_status = tsi721_tx_status;
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index a54ba0494dd3..d7b87c64b7cd 100644
--- a/drivers/rapidio/rio.c
+++ b/drivers/rapidio/rio.c
@@ -1509,30 +1509,39 @@ EXPORT_SYMBOL_GPL(rio_route_clr_table);
 
 static bool rio_chan_filter(struct dma_chan *chan, void *arg)
 {
-	struct rio_dev *rdev = arg;
+	struct rio_mport *mport = arg;
 
 	/* Check that DMA device belongs to the right MPORT */
-	return (rdev->net->hport ==
-		container_of(chan->device, struct rio_mport, dma));
+	return mport == container_of(chan->device, struct rio_mport, dma);
 }
 
 /**
- * rio_request_dma - request RapidIO capable DMA channel that supports
- *   specified target RapidIO device.
- * @rdev: RIO device control structure
+ * rio_request_mport_dma - request RapidIO capable DMA channel associated
+ *   with specified local RapidIO mport device.
+ * @mport: RIO mport to perform DMA data transfers
  *
  * Returns pointer to allocated DMA channel or NULL if failed.
  */
-struct dma_chan *rio_request_dma(struct rio_dev *rdev)
+struct dma_chan *rio_request_mport_dma(struct rio_mport *mport)
 {
 	dma_cap_mask_t mask;
-	struct dma_chan *dchan;
 
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);
-	dchan = dma_request_channel(mask, rio_chan_filter, rdev);
+	return dma_request_channel(mask, rio_chan_filter, mport);
+}
+EXPORT_SYMBOL_GPL(rio_request_mport_dma);
 
-	return dchan;
+/**
+ * rio_request_dma - request RapidIO capable DMA channel that supports
+ *   specified target RapidIO device.
+ * @rdev: RIO device associated with DMA transfer
+ *
+ * Returns pointer to allocated DMA channel or NULL if failed.
+ */
+struct dma_chan *rio_request_dma(struct rio_dev *rdev)
+{
+	return rio_request_mport_dma(rdev->net->hport);
 }
 EXPORT_SYMBOL_GPL(rio_request_dma);
 
@@ -1547,10 +1556,10 @@ void rio_release_dma(struct dma_chan *dchan)
 EXPORT_SYMBOL_GPL(rio_release_dma);
 
 /**
- * rio_dma_prep_slave_sg - RapidIO specific wrapper
+ * rio_dma_prep_xfer - RapidIO specific wrapper
  *   for device_prep_slave_sg callback defined by DMAENGINE.
- * @rdev: RIO device control structure
  * @dchan: DMA channel to configure
+ * @destid: target RapidIO device destination ID
  * @data: RIO specific data descriptor
  * @direction: DMA data transfer direction (TO or FROM the device)
  * @flags: dmaengine defined flags
@@ -1560,11 +1569,10 @@ EXPORT_SYMBOL_GPL(rio_release_dma);
  * target RIO device.
  * Returns pointer to DMA transaction descriptor or NULL if failed.
  */
-struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev,
-	struct dma_chan *dchan, struct rio_dma_data *data,
+struct dma_async_tx_descriptor *rio_dma_prep_xfer(struct dma_chan *dchan,
+	u16 destid, struct rio_dma_data *data,
 	enum dma_transfer_direction direction, unsigned long flags)
 {
-	struct dma_async_tx_descriptor *txd = NULL;
 	struct rio_dma_ext rio_ext;
 
 	if (dchan->device->device_prep_slave_sg == NULL) {
@@ -1572,15 +1580,35 @@ struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev,
 		return NULL;
 	}
 
-	rio_ext.destid = rdev->destid;
+	rio_ext.destid = destid;
 	rio_ext.rio_addr_u = data->rio_addr_u;
 	rio_ext.rio_addr = data->rio_addr;
 	rio_ext.wr_type = data->wr_type;
 
-	txd = dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len,
-					direction, flags, &rio_ext);
+	return dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len,
+				     direction, flags, &rio_ext);
+}
+EXPORT_SYMBOL_GPL(rio_dma_prep_xfer);
 
-	return txd;
+/**
+ * rio_dma_prep_slave_sg - RapidIO specific wrapper
+ *   for device_prep_slave_sg callback defined by DMAENGINE.
+ * @rdev: RIO device control structure
+ * @dchan: DMA channel to configure
+ * @data: RIO specific data descriptor
+ * @direction: DMA data transfer direction (TO or FROM the device)
+ * @flags: dmaengine defined flags
+ *
+ * Initializes RapidIO capable DMA channel for the specified data transfer.
+ * Uses DMA channel private extension to pass information related to remote
+ * target RIO device.
+ * Returns pointer to DMA transaction descriptor or NULL if failed.
+ */
+struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev,
+	struct dma_chan *dchan, struct rio_dma_data *data,
+	enum dma_transfer_direction direction, unsigned long flags)
+{
+	return rio_dma_prep_xfer(dchan,	rdev->destid, data, direction, flags);
 }
 EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg);
 
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 0754f5c7cb3b..a168e96142b9 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -373,6 +373,14 @@ config RTC_DRV_PCF8563
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-pcf8563.
 
+config RTC_DRV_PCF85063
+	tristate "nxp PCF85063"
+	help
+	  If you say yes here you get support for the PCF85063 RTC chip
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-pcf85063.
+
 config RTC_DRV_PCF8583
 	tristate "Philips PCF8583"
 	help
@@ -760,6 +768,15 @@ config RTC_DRV_DS1742
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-ds1742.
 
+config RTC_DRV_DS2404
+	tristate "Maxim/Dallas DS2404"
+	help
+	  If you say yes here you get support for the
+	  Dallas DS2404 RTC chip.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-ds2404.
+
 config RTC_DRV_DA9052
 	tristate "Dialog DA9052/DA9053 RTC"
 	depends on PMIC_DA9052
@@ -789,7 +806,7 @@ config RTC_DRV_DA9063
 
 config RTC_DRV_EFI
 	tristate "EFI RTC"
-	depends on IA64
+	depends on EFI
 	help
 	  If you say yes here you will get support for the EFI
 	  Real Time Clock.
@@ -873,15 +890,6 @@ config RTC_DRV_V3020
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-v3020.
 
-config RTC_DRV_DS2404
-	tristate "Dallas DS2404"
-	help
-	  If you say yes here you get support for the
-	  Dallas DS2404 RTC chip.
-
-	  This driver can also be built as a module. If so, the module
-	  will be called rtc-ds2404.
-
 config RTC_DRV_WM831X
 	tristate "Wolfson Microelectronics WM831x RTC"
 	depends on MFD_WM831X
@@ -1349,6 +1357,7 @@ config RTC_DRV_SIRFSOC
 
 config RTC_DRV_MOXART
 	tristate "MOXA ART RTC"
+	depends on ARCH_MOXART || COMPILE_TEST
 	help
 	   If you say yes here you get support for the MOXA ART
 	   RTC module.
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 70347d041d10..56f061c7c815 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -10,6 +10,10 @@ obj-$(CONFIG_RTC_SYSTOHC)	+= systohc.o
 obj-$(CONFIG_RTC_CLASS)		+= rtc-core.o
 rtc-core-y			:= class.o interface.o
 
+ifdef CONFIG_RTC_DRV_EFI
+rtc-core-y			+= rtc-efi-platform.o
+endif
+
 rtc-core-$(CONFIG_RTC_INTF_DEV)	+= rtc-dev.o
 rtc-core-$(CONFIG_RTC_INTF_PROC) += rtc-proc.o
 rtc-core-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o
@@ -93,6 +97,7 @@ obj-$(CONFIG_RTC_DRV_PCAP)	+= rtc-pcap.o
 obj-$(CONFIG_RTC_DRV_PCF2127)	+= rtc-pcf2127.o
 obj-$(CONFIG_RTC_DRV_PCF8523)	+= rtc-pcf8523.o
 obj-$(CONFIG_RTC_DRV_PCF8563)	+= rtc-pcf8563.o
+obj-$(CONFIG_RTC_DRV_PCF85063)	+= rtc-pcf85063.o
 obj-$(CONFIG_RTC_DRV_PCF8583)	+= rtc-pcf8583.o
 obj-$(CONFIG_RTC_DRV_PCF2123)	+= rtc-pcf2123.o
 obj-$(CONFIG_RTC_DRV_PCF50633)	+= rtc-pcf50633.o
diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index 589351ef75d0..38e26be705be 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -53,6 +53,7 @@ static int rtc_suspend(struct device *dev)
 	struct rtc_device	*rtc = to_rtc_device(dev);
 	struct rtc_time		tm;
 	struct timespec		delta, delta_delta;
+	int err;
 
 	if (has_persistent_clock())
 		return 0;
@@ -61,7 +62,12 @@ static int rtc_suspend(struct device *dev)
 		return 0;
 
 	/* snapshot the current RTC and system time at suspend*/
-	rtc_read_time(rtc, &tm);
+	err = rtc_read_time(rtc, &tm);
+	if (err < 0) {
+		pr_debug("%s:  fail to read rtc time\n", dev_name(&rtc->dev));
+		return 0;
+	}
+
 	getnstimeofday(&old_system);
 	rtc_tm_to_time(&tm, &old_rtc.tv_sec);
 
@@ -94,6 +100,7 @@ static int rtc_resume(struct device *dev)
 	struct rtc_time		tm;
 	struct timespec		new_system, new_rtc;
 	struct timespec		sleep_time;
+	int err;
 
 	if (has_persistent_clock())
 		return 0;
@@ -104,7 +111,12 @@ static int rtc_resume(struct device *dev)
 
 	/* snapshot the current rtc and system time at resume */
 	getnstimeofday(&new_system);
-	rtc_read_time(rtc, &tm);
+	err = rtc_read_time(rtc, &tm);
+	if (err < 0) {
+		pr_debug("%s:  fail to read rtc time\n", dev_name(&rtc->dev));
+		return 0;
+	}
+
 	if (rtc_valid_tm(&tm) != 0) {
 		pr_debug("%s:  bogus resume time\n", dev_name(&rtc->dev));
 		return 0;
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 5813fa52c3d4..5b2717f5dafa 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -348,6 +348,8 @@ static int __rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
 
 	/* Make sure we're not setting alarms in the past */
 	err = __rtc_read_time(rtc, &tm);
+	if (err)
+		return err;
 	rtc_tm_to_time(&tm, &now);
 	if (scheduled <= now)
 		return -ETIME;
diff --git a/drivers/rtc/rtc-ds1343.c b/drivers/rtc/rtc-ds1343.c
index c3719189dd96..ae9f997223b1 100644
--- a/drivers/rtc/rtc-ds1343.c
+++ b/drivers/rtc/rtc-ds1343.c
@@ -4,6 +4,7 @@
  * Real Time Clock
  *
  * Author : Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>
+ *	    Ankur Srivastava <sankurece@gmail.com> : DS1343 Nvram Support
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -45,6 +46,9 @@
 #define DS1343_CONTROL_REG	0x0F
 #define DS1343_STATUS_REG	0x10
 #define DS1343_TRICKLE_REG	0x11
+#define DS1343_NVRAM		0x20
+
+#define DS1343_NVRAM_LEN	96
 
 /* DS1343 Control Registers bits */
 #define DS1343_EOSC		0x80
@@ -149,6 +153,64 @@ static ssize_t ds1343_store_glitchfilter(struct device *dev,
 static DEVICE_ATTR(glitch_filter, S_IRUGO | S_IWUSR, ds1343_show_glitchfilter,
 			ds1343_store_glitchfilter);
 
+static ssize_t ds1343_nvram_write(struct file *filp, struct kobject *kobj,
+			struct bin_attribute *attr,
+			char *buf, loff_t off, size_t count)
+{
+	int ret;
+	unsigned char address;
+	struct device *dev = kobj_to_dev(kobj);
+	struct ds1343_priv *priv = dev_get_drvdata(dev);
+
+	if (unlikely(!count))
+		return count;
+
+	if ((count + off) > DS1343_NVRAM_LEN)
+		count = DS1343_NVRAM_LEN - off;
+
+	address = DS1343_NVRAM + off;
+
+	ret = regmap_bulk_write(priv->map, address, buf, count);
+	if (ret < 0)
+		dev_err(&priv->spi->dev, "Error in nvram write %d", ret);
+
+	return (ret < 0) ? ret : count;
+}
+
+
+static ssize_t ds1343_nvram_read(struct file *filp, struct kobject *kobj,
+				struct bin_attribute *attr,
+				char *buf, loff_t off, size_t count)
+{
+	int ret;
+	unsigned char address;
+	struct device *dev = kobj_to_dev(kobj);
+	struct ds1343_priv *priv = dev_get_drvdata(dev);
+
+	if (unlikely(!count))
+		return count;
+
+	if ((count + off) > DS1343_NVRAM_LEN)
+		count = DS1343_NVRAM_LEN - off;
+
+	address = DS1343_NVRAM + off;
+
+	ret = regmap_bulk_read(priv->map, address, buf, count);
+	if (ret < 0)
+		dev_err(&priv->spi->dev, "Error in nvram read %d\n", ret);
+
+	return (ret < 0) ? ret : count;
+}
+
+
+static struct bin_attribute nvram_attr = {
+	.attr.name	= "nvram",
+	.attr.mode	= S_IRUGO | S_IWUSR,
+	.read		= ds1343_nvram_read,
+	.write		= ds1343_nvram_write,
+	.size		= DS1343_NVRAM_LEN,
+};
+
 static ssize_t ds1343_show_alarmstatus(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
@@ -274,12 +336,16 @@ static int ds1343_sysfs_register(struct device *dev)
 	if (err)
 		goto error1;
 
+	err = device_create_bin_file(dev, &nvram_attr);
+	if (err)
+		goto error2;
+
 	if (priv->irq <= 0)
 		return err;
 
 	err = device_create_file(dev, &dev_attr_alarm_mode);
 	if (err)
-		goto error2;
+		goto error3;
 
 	err = device_create_file(dev, &dev_attr_alarm_status);
 	if (!err)
@@ -287,6 +353,9 @@ static int ds1343_sysfs_register(struct device *dev)
 
 	device_remove_file(dev, &dev_attr_alarm_mode);
 
+error3:
+	device_remove_bin_file(dev, &nvram_attr);
+
 error2:
 	device_remove_file(dev, &dev_attr_trickle_charger);
 
@@ -302,6 +371,7 @@ static void ds1343_sysfs_unregister(struct device *dev)
 
 	device_remove_file(dev, &dev_attr_glitch_filter);
 	device_remove_file(dev, &dev_attr_trickle_charger);
+	device_remove_bin_file(dev, &nvram_attr);
 
 	if (priv->irq <= 0)
 		return;
@@ -684,6 +754,7 @@ static struct spi_driver ds1343_driver = {
 module_spi_driver(ds1343_driver);
 
 MODULE_DESCRIPTION("DS1343 RTC SPI Driver");
-MODULE_AUTHOR("Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>");
+MODULE_AUTHOR("Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>,"
+		"Ankur Srivastava <sankurece@gmail.com>");
 MODULE_LICENSE("GPL v2");
 MODULE_VERSION(DS1343_DRV_VERSION);
diff --git a/drivers/rtc/rtc-ds1742.c b/drivers/rtc/rtc-ds1742.c
index c6b2191a4128..9822715db8ba 100644
--- a/drivers/rtc/rtc-ds1742.c
+++ b/drivers/rtc/rtc-ds1742.c
@@ -231,7 +231,7 @@ static struct platform_driver ds1742_rtc_driver = {
 	.driver		= {
 		.name	= "rtc-ds1742",
 		.owner	= THIS_MODULE,
-		.of_match_table = ds1742_rtc_of_match,
+		.of_match_table = of_match_ptr(ds1742_rtc_of_match),
 	},
 };
 
diff --git a/drivers/rtc/rtc-efi-platform.c b/drivers/rtc/rtc-efi-platform.c
new file mode 100644
index 000000000000..b40fbe332af4
--- /dev/null
+++ b/drivers/rtc/rtc-efi-platform.c
@@ -0,0 +1,31 @@
+/*
+ * Moved from arch/ia64/kernel/time.c
+ *
+ * Copyright (C) 1998-2003 Hewlett-Packard Co
+ *	Stephane Eranian <eranian@hpl.hp.com>
+ *	David Mosberger <davidm@hpl.hp.com>
+ * Copyright (C) 1999 Don Dugger <don.dugger@intel.com>
+ * Copyright (C) 1999-2000 VA Linux Systems
+ * Copyright (C) 1999-2000 Walt Drummond <drummond@valinux.com>
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/efi.h>
+#include <linux/platform_device.h>
+
+static struct platform_device rtc_efi_dev = {
+	.name = "rtc-efi",
+	.id = -1,
+};
+
+static int __init rtc_init(void)
+{
+	if (efi_enabled(EFI_RUNTIME_SERVICES))
+		if (platform_device_register(&rtc_efi_dev) < 0)
+			pr_err("unable to register rtc device...\n");
+
+	/* not necessarily an error */
+	return 0;
+}
+module_init(rtc_init);
diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c
index c4c38431012e..8225b89de810 100644
--- a/drivers/rtc/rtc-efi.c
+++ b/drivers/rtc/rtc-efi.c
@@ -17,6 +17,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/stringify.h>
 #include <linux/time.h>
 #include <linux/platform_device.h>
 #include <linux/rtc.h>
@@ -48,8 +49,8 @@ compute_wday(efi_time_t *eft)
 	int y;
 	int ndays = 0;
 
-	if (eft->year < 1998) {
-		pr_err("EFI year < 1998, invalid date\n");
+	if (eft->year < EFI_RTC_EPOCH) {
+		pr_err("EFI year < " __stringify(EFI_RTC_EPOCH) ", invalid date\n");
 		return -1;
 	}
 
@@ -78,19 +79,36 @@ convert_to_efi_time(struct rtc_time *wtime, efi_time_t *eft)
 	eft->timezone	= EFI_UNSPECIFIED_TIMEZONE;
 }
 
-static void
+static bool
 convert_from_efi_time(efi_time_t *eft, struct rtc_time *wtime)
 {
 	memset(wtime, 0, sizeof(*wtime));
+
+	if (eft->second >= 60)
+		return false;
 	wtime->tm_sec  = eft->second;
+
+	if (eft->minute >= 60)
+		return false;
 	wtime->tm_min  = eft->minute;
+
+	if (eft->hour >= 24)
+		return false;
 	wtime->tm_hour = eft->hour;
+
+	if (!eft->day || eft->day > 31)
+		return false;
 	wtime->tm_mday = eft->day;
+
+	if (!eft->month || eft->month > 12)
+		return false;
 	wtime->tm_mon  = eft->month - 1;
 	wtime->tm_year = eft->year - 1900;
 
 	/* day of the week [0-6], Sunday=0 */
 	wtime->tm_wday = compute_wday(eft);
+	if (wtime->tm_wday < 0)
+		return false;
 
 	/* day in the year [1-365]*/
 	wtime->tm_yday = compute_yday(eft);
@@ -106,6 +124,8 @@ convert_from_efi_time(efi_time_t *eft, struct rtc_time *wtime)
 	default:
 		wtime->tm_isdst = -1;
 	}
+
+	return true;
 }
 
 static int efi_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
@@ -122,7 +142,8 @@ static int efi_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
 	if (status != EFI_SUCCESS)
 		return -EINVAL;
 
-	convert_from_efi_time(&eft, &wkalrm->time);
+	if (!convert_from_efi_time(&eft, &wkalrm->time))
+		return -EIO;
 
 	return rtc_valid_tm(&wkalrm->time);
 }
@@ -163,7 +184,8 @@ static int efi_read_time(struct device *dev, struct rtc_time *tm)
 		return -EINVAL;
 	}
 
-	convert_from_efi_time(&eft, tm);
+	if (!convert_from_efi_time(&eft, tm))
+		return -EIO;
 
 	return rtc_valid_tm(tm);
 }
diff --git a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c
index 03b891129428..aa55f081c505 100644
--- a/drivers/rtc/rtc-isl12022.c
+++ b/drivers/rtc/rtc-isl12022.c
@@ -17,6 +17,8 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 
 #define DRV_VERSION "0.1"
 
@@ -271,6 +273,13 @@ static int isl12022_probe(struct i2c_client *client,
 	return PTR_ERR_OR_ZERO(isl12022->rtc);
 }
 
+#ifdef CONFIG_OF
+static struct of_device_id isl12022_dt_match[] = {
+	{ .compatible = "isl,isl12022" },
+	{ },
+};
+#endif
+
 static const struct i2c_device_id isl12022_id[] = {
 	{ "isl12022", 0 },
 	{ }
@@ -280,6 +289,9 @@ MODULE_DEVICE_TABLE(i2c, isl12022_id);
 static struct i2c_driver isl12022_driver = {
 	.driver		= {
 		.name	= "rtc-isl12022",
+#ifdef CONFIG_OF
+		.of_match_table = of_match_ptr(isl12022_dt_match),
+#endif
 	},
 	.probe		= isl12022_probe,
 	.id_table	= isl12022_id,
diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c
new file mode 100644
index 000000000000..6a12bf62c504
--- /dev/null
+++ b/drivers/rtc/rtc-pcf85063.c
@@ -0,0 +1,204 @@
+/*
+ * An I2C driver for the PCF85063 RTC
+ * Copyright 2014 Rose Technology
+ *
+ * Author: Søren Andersen <san@rosetechnology.dk>
+ * Maintainers: http://www.nslu2-linux.org/
+ *
+ * based on the other drivers in this same directory.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/i2c.h>
+#include <linux/bcd.h>
+#include <linux/rtc.h>
+#include <linux/module.h>
+
+#define DRV_VERSION "0.0.1"
+
+#define PCF85063_REG_CTRL1		0x00 /* status */
+#define PCF85063_REG_CTRL2		0x01
+
+#define PCF85063_REG_SC			0x04 /* datetime */
+#define PCF85063_REG_MN			0x05
+#define PCF85063_REG_HR			0x06
+#define PCF85063_REG_DM			0x07
+#define PCF85063_REG_DW			0x08
+#define PCF85063_REG_MO			0x09
+#define PCF85063_REG_YR			0x0A
+
+#define PCF85063_MO_C			0x80 /* century */
+
+static struct i2c_driver pcf85063_driver;
+
+struct pcf85063 {
+	struct rtc_device *rtc;
+	int c_polarity;	/* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */
+	int voltage_low; /* indicates if a low_voltage was detected */
+};
+
+/*
+ * In the routines that deal directly with the pcf85063 hardware, we use
+ * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
+ */
+static int pcf85063_get_datetime(struct i2c_client *client, struct rtc_time *tm)
+{
+	struct pcf85063 *pcf85063 = i2c_get_clientdata(client);
+	unsigned char buf[13] = { PCF85063_REG_CTRL1 };
+	struct i2c_msg msgs[] = {
+		{/* setup read ptr */
+			.addr = client->addr,
+			.len = 1,
+			.buf = buf
+		},
+		{/* read status + date */
+			.addr = client->addr,
+			.flags = I2C_M_RD,
+			.len = 13,
+			.buf = buf
+		},
+	};
+
+	/* read registers */
+	if ((i2c_transfer(client->adapter, msgs, 2)) != 2) {
+		dev_err(&client->dev, "%s: read error\n", __func__);
+		return -EIO;
+	}
+
+	tm->tm_sec = bcd2bin(buf[PCF85063_REG_SC] & 0x7F);
+	tm->tm_min = bcd2bin(buf[PCF85063_REG_MN] & 0x7F);
+	tm->tm_hour = bcd2bin(buf[PCF85063_REG_HR] & 0x3F); /* rtc hr 0-23 */
+	tm->tm_mday = bcd2bin(buf[PCF85063_REG_DM] & 0x3F);
+	tm->tm_wday = buf[PCF85063_REG_DW] & 0x07;
+	tm->tm_mon = bcd2bin(buf[PCF85063_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */
+	tm->tm_year = bcd2bin(buf[PCF85063_REG_YR]);
+	if (tm->tm_year < 70)
+		tm->tm_year += 100;	/* assume we are in 1970...2069 */
+	/* detect the polarity heuristically. see note above. */
+	pcf85063->c_polarity = (buf[PCF85063_REG_MO] & PCF85063_MO_C) ?
+		(tm->tm_year >= 100) : (tm->tm_year < 100);
+
+	/* the clock can give out invalid datetime, but we cannot return
+	 * -EINVAL otherwise hwclock will refuse to set the time on bootup.
+	 */
+	if (rtc_valid_tm(tm) < 0)
+		dev_err(&client->dev, "retrieved date/time is not valid.\n");
+
+	return 0;
+}
+
+static int pcf85063_set_datetime(struct i2c_client *client, struct rtc_time *tm)
+{
+	int i = 0, err = 0;
+	unsigned char buf[11];
+
+	/* Control & status */
+	buf[PCF85063_REG_CTRL1] = 0;
+	buf[PCF85063_REG_CTRL2] = 5;
+
+	/* hours, minutes and seconds */
+	buf[PCF85063_REG_SC] = bin2bcd(tm->tm_sec) & 0x7F;
+
+	buf[PCF85063_REG_MN] = bin2bcd(tm->tm_min);
+	buf[PCF85063_REG_HR] = bin2bcd(tm->tm_hour);
+
+	/* Day of month, 1 - 31 */
+	buf[PCF85063_REG_DM] = bin2bcd(tm->tm_mday);
+
+	/* Day, 0 - 6 */
+	buf[PCF85063_REG_DW] = tm->tm_wday & 0x07;
+
+	/* month, 1 - 12 */
+	buf[PCF85063_REG_MO] = bin2bcd(tm->tm_mon + 1);
+
+	/* year and century */
+	buf[PCF85063_REG_YR] = bin2bcd(tm->tm_year % 100);
+
+	/* write register's data */
+	for (i = 0; i < sizeof(buf); i++) {
+		unsigned char data[2] = { i, buf[i] };
+
+		err = i2c_master_send(client, data, sizeof(data));
+		if (err != sizeof(data)) {
+			dev_err(&client->dev, "%s: err=%d addr=%02x, data=%02x\n",
+					__func__, err, data[0], data[1]);
+			return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+static int pcf85063_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	return pcf85063_get_datetime(to_i2c_client(dev), tm);
+}
+
+static int pcf85063_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+	return pcf85063_set_datetime(to_i2c_client(dev), tm);
+}
+
+static const struct rtc_class_ops pcf85063_rtc_ops = {
+	.read_time	= pcf85063_rtc_read_time,
+	.set_time	= pcf85063_rtc_set_time
+};
+
+static int pcf85063_probe(struct i2c_client *client,
+				const struct i2c_device_id *id)
+{
+	struct pcf85063 *pcf85063;
+
+	dev_dbg(&client->dev, "%s\n", __func__);
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+		return -ENODEV;
+
+	pcf85063 = devm_kzalloc(&client->dev, sizeof(struct pcf85063),
+				GFP_KERNEL);
+	if (!pcf85063)
+		return -ENOMEM;
+
+	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
+
+	i2c_set_clientdata(client, pcf85063);
+
+	pcf85063->rtc = devm_rtc_device_register(&client->dev,
+				pcf85063_driver.driver.name,
+				&pcf85063_rtc_ops, THIS_MODULE);
+
+	return PTR_ERR_OR_ZERO(pcf85063->rtc);
+}
+
+static const struct i2c_device_id pcf85063_id[] = {
+	{ "pcf85063", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, pcf85063_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id pcf85063_of_match[] = {
+	{ .compatible = "nxp,pcf85063" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, pcf85063_of_match);
+#endif
+
+static struct i2c_driver pcf85063_driver = {
+	.driver		= {
+		.name	= "rtc-pcf85063",
+		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(pcf85063_of_match),
+	},
+	.probe		= pcf85063_probe,
+	.id_table	= pcf85063_id,
+};
+
+module_i2c_driver(pcf85063_driver);
+
+MODULE_AUTHOR("Søren Andersen <san@rosetechnology.dk>");
+MODULE_DESCRIPTION("PCF85063 RTC driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index 63b558c48196..5a197d9dc7e7 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -26,6 +26,8 @@
 
 #define PCF8563_REG_ST1		0x00 /* status */
 #define PCF8563_REG_ST2		0x01
+#define PCF8563_BIT_AIE		(1 << 1)
+#define PCF8563_BIT_AF		(1 << 3)
 
 #define PCF8563_REG_SC		0x02 /* datetime */
 #define PCF8563_REG_MN		0x03
@@ -36,9 +38,6 @@
 #define PCF8563_REG_YR		0x08
 
 #define PCF8563_REG_AMN		0x09 /* alarm */
-#define PCF8563_REG_AHR		0x0A
-#define PCF8563_REG_ADM		0x0B
-#define PCF8563_REG_ADW		0x0C
 
 #define PCF8563_REG_CLKO	0x0D /* clock out */
 #define PCF8563_REG_TMRC	0x0E /* timer control */
@@ -67,37 +66,133 @@ struct pcf8563 {
 	 */
 	int c_polarity;	/* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */
 	int voltage_low; /* incicates if a low_voltage was detected */
+
+	struct i2c_client *client;
 };
 
-/*
- * In the routines that deal directly with the pcf8563 hardware, we use
- * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
- */
-static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm)
+static int pcf8563_read_block_data(struct i2c_client *client, unsigned char reg,
+				   unsigned char length, unsigned char *buf)
 {
-	struct pcf8563 *pcf8563 = i2c_get_clientdata(client);
-	unsigned char buf[13] = { PCF8563_REG_ST1 };
-
 	struct i2c_msg msgs[] = {
 		{/* setup read ptr */
 			.addr = client->addr,
 			.len = 1,
-			.buf = buf
+			.buf = &reg,
 		},
-		{/* read status + date */
+		{
 			.addr = client->addr,
 			.flags = I2C_M_RD,
-			.len = 13,
+			.len = length,
 			.buf = buf
 		},
 	};
 
-	/* read registers */
 	if ((i2c_transfer(client->adapter, msgs, 2)) != 2) {
 		dev_err(&client->dev, "%s: read error\n", __func__);
 		return -EIO;
 	}
 
+	return 0;
+}
+
+static int pcf8563_write_block_data(struct i2c_client *client,
+				   unsigned char reg, unsigned char length,
+				   unsigned char *buf)
+{
+	int i, err;
+
+	for (i = 0; i < length; i++) {
+		unsigned char data[2] = { reg + i, buf[i] };
+
+		err = i2c_master_send(client, data, sizeof(data));
+		if (err != sizeof(data)) {
+			dev_err(&client->dev,
+				"%s: err=%d addr=%02x, data=%02x\n",
+				__func__, err, data[0], data[1]);
+			return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+static int pcf8563_set_alarm_mode(struct i2c_client *client, bool on)
+{
+	unsigned char buf[2];
+	int err;
+
+	err = pcf8563_read_block_data(client, PCF8563_REG_ST2, 1, buf + 1);
+	if (err < 0)
+		return err;
+
+	if (on)
+		buf[1] |= PCF8563_BIT_AIE;
+	else
+		buf[1] &= ~PCF8563_BIT_AIE;
+
+	buf[1] &= ~PCF8563_BIT_AF;
+	buf[0] = PCF8563_REG_ST2;
+
+	err = pcf8563_write_block_data(client, PCF8563_REG_ST2, 1, buf + 1);
+	if (err < 0) {
+		dev_err(&client->dev, "%s: write error\n", __func__);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int pcf8563_get_alarm_mode(struct i2c_client *client, unsigned char *en,
+				  unsigned char *pen)
+{
+	unsigned char buf;
+	int err;
+
+	err = pcf8563_read_block_data(client, PCF8563_REG_ST2, 1, &buf);
+	if (err)
+		return err;
+
+	if (en)
+		*en = !!(buf & PCF8563_BIT_AIE);
+	if (pen)
+		*pen = !!(buf & PCF8563_BIT_AF);
+
+	return 0;
+}
+
+static irqreturn_t pcf8563_irq(int irq, void *dev_id)
+{
+	struct pcf8563 *pcf8563 = i2c_get_clientdata(dev_id);
+	int err;
+	char pending;
+
+	err = pcf8563_get_alarm_mode(pcf8563->client, NULL, &pending);
+	if (err < 0)
+		return err;
+
+	if (pending) {
+		rtc_update_irq(pcf8563->rtc, 1, RTC_IRQF | RTC_AF);
+		pcf8563_set_alarm_mode(pcf8563->client, 1);
+		return IRQ_HANDLED;
+	}
+
+	return IRQ_NONE;
+}
+
+/*
+ * In the routines that deal directly with the pcf8563 hardware, we use
+ * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
+ */
+static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm)
+{
+	struct pcf8563 *pcf8563 = i2c_get_clientdata(client);
+	unsigned char buf[9];
+	int err;
+
+	err = pcf8563_read_block_data(client, PCF8563_REG_ST1, 9, buf);
+	if (err)
+		return err;
+
 	if (buf[PCF8563_REG_SC] & PCF8563_SC_LV) {
 		pcf8563->voltage_low = 1;
 		dev_info(&client->dev,
@@ -144,7 +239,7 @@ static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm)
 static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm)
 {
 	struct pcf8563 *pcf8563 = i2c_get_clientdata(client);
-	int i, err;
+	int err;
 	unsigned char buf[9];
 
 	dev_dbg(&client->dev, "%s: secs=%d, mins=%d, hours=%d, "
@@ -170,19 +265,10 @@ static int pcf8563_set_datetime(struct i2c_client *client, struct rtc_time *tm)
 
 	buf[PCF8563_REG_DW] = tm->tm_wday & 0x07;
 
-	/* write register's data */
-	for (i = 0; i < 7; i++) {
-		unsigned char data[2] = { PCF8563_REG_SC + i,
-						buf[PCF8563_REG_SC + i] };
-
-		err = i2c_master_send(client, data, sizeof(data));
-		if (err != sizeof(data)) {
-			dev_err(&client->dev,
-				"%s: err=%d addr=%02x, data=%02x\n",
-				__func__, err, data[0], data[1]);
-			return -EIO;
-		}
-	}
+	err = pcf8563_write_block_data(client, PCF8563_REG_SC,
+				9 - PCF8563_REG_SC, buf + PCF8563_REG_SC);
+	if (err)
+		return err;
 
 	return 0;
 }
@@ -235,16 +321,83 @@ static int pcf8563_rtc_set_time(struct device *dev, struct rtc_time *tm)
 	return pcf8563_set_datetime(to_i2c_client(dev), tm);
 }
 
+static int pcf8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	unsigned char buf[4];
+	int err;
+
+	err = pcf8563_read_block_data(client, PCF8563_REG_AMN, 4, buf);
+	if (err)
+		return err;
+
+	dev_dbg(&client->dev,
+		"%s: raw data is min=%02x, hr=%02x, mday=%02x, wday=%02x\n",
+		__func__, buf[0], buf[1], buf[2], buf[3]);
+
+	tm->time.tm_min = bcd2bin(buf[0] & 0x7F);
+	tm->time.tm_hour = bcd2bin(buf[1] & 0x7F);
+	tm->time.tm_mday = bcd2bin(buf[2] & 0x1F);
+	tm->time.tm_wday = bcd2bin(buf[3] & 0x7);
+	tm->time.tm_mon = -1;
+	tm->time.tm_year = -1;
+	tm->time.tm_yday = -1;
+	tm->time.tm_isdst = -1;
+
+	err = pcf8563_get_alarm_mode(client, &tm->enabled, &tm->pending);
+	if (err < 0)
+		return err;
+
+	dev_dbg(&client->dev, "%s: tm is mins=%d, hours=%d, mday=%d, wday=%d,"
+		" enabled=%d, pending=%d\n", __func__, tm->time.tm_min,
+		tm->time.tm_hour, tm->time.tm_mday, tm->time.tm_wday,
+		tm->enabled, tm->pending);
+
+	return 0;
+}
+
+static int pcf8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	unsigned char buf[4];
+	int err;
+
+	dev_dbg(dev, "%s, min=%d hour=%d wday=%d mday=%d "
+		"enabled=%d pending=%d\n", __func__,
+		tm->time.tm_min, tm->time.tm_hour, tm->time.tm_wday,
+		tm->time.tm_mday, tm->enabled, tm->pending);
+
+	buf[0] = bin2bcd(tm->time.tm_min);
+	buf[1] = bin2bcd(tm->time.tm_hour);
+	buf[2] = bin2bcd(tm->time.tm_mday);
+	buf[3] = tm->time.tm_wday & 0x07;
+
+	err = pcf8563_write_block_data(client, PCF8563_REG_AMN, 4, buf);
+	if (err)
+		return err;
+
+	return pcf8563_set_alarm_mode(client, 1);
+}
+
+static int pcf8563_irq_enable(struct device *dev, unsigned int enabled)
+{
+	return pcf8563_set_alarm_mode(to_i2c_client(dev), !!enabled);
+}
+
 static const struct rtc_class_ops pcf8563_rtc_ops = {
 	.ioctl		= pcf8563_rtc_ioctl,
 	.read_time	= pcf8563_rtc_read_time,
 	.set_time	= pcf8563_rtc_set_time,
+	.read_alarm	= pcf8563_rtc_read_alarm,
+	.set_alarm	= pcf8563_rtc_set_alarm,
+	.alarm_irq_enable = pcf8563_irq_enable,
 };
 
 static int pcf8563_probe(struct i2c_client *client,
 				const struct i2c_device_id *id)
 {
 	struct pcf8563 *pcf8563;
+	int err;
 
 	dev_dbg(&client->dev, "%s\n", __func__);
 
@@ -259,12 +412,30 @@ static int pcf8563_probe(struct i2c_client *client,
 	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
 
 	i2c_set_clientdata(client, pcf8563);
+	pcf8563->client = client;
+	device_set_wakeup_capable(&client->dev, 1);
 
 	pcf8563->rtc = devm_rtc_device_register(&client->dev,
 				pcf8563_driver.driver.name,
 				&pcf8563_rtc_ops, THIS_MODULE);
 
-	return PTR_ERR_OR_ZERO(pcf8563->rtc);
+	if (IS_ERR(pcf8563->rtc))
+		return PTR_ERR(pcf8563->rtc);
+
+	if (client->irq > 0) {
+		err = devm_request_threaded_irq(&client->dev, client->irq,
+				NULL, pcf8563_irq,
+				IRQF_SHARED|IRQF_ONESHOT|IRQF_TRIGGER_FALLING,
+				pcf8563->rtc->name, client);
+		if (err) {
+			dev_err(&client->dev, "unable to request IRQ %d\n",
+								client->irq);
+			return err;
+		}
+
+	}
+
+	return 0;
 }
 
 static const struct i2c_device_id pcf8563_id[] = {
diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c
index 7af00208d637..2583349fbde5 100644
--- a/drivers/rtc/rtc-tps65910.c
+++ b/drivers/rtc/rtc-tps65910.c
@@ -258,6 +258,8 @@ static int tps65910_rtc_probe(struct platform_device *pdev)
 	if (ret < 0)
 		return ret;
 
+	platform_set_drvdata(pdev, tps_rtc);
+
 	irq  = platform_get_irq(pdev, 0);
 	if (irq <= 0) {
 		dev_warn(&pdev->dev, "Wake up is not possible as irq = %d\n",
@@ -283,8 +285,6 @@ static int tps65910_rtc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	platform_set_drvdata(pdev, tps_rtc);
-
 	return 0;
 }
 
diff --git a/drivers/scsi/3w-sas.c b/drivers/scsi/3w-sas.c
index 4de346017e9f..6da6cec9a651 100644
--- a/drivers/scsi/3w-sas.c
+++ b/drivers/scsi/3w-sas.c
@@ -683,14 +683,13 @@ static int twl_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
 	unsigned long *cpu_addr;
 	int retval = 1;
 
-	cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
+	cpu_addr = pci_zalloc_consistent(tw_dev->tw_pci_dev, size * TW_Q_LENGTH,
+					 &dma_handle);
 	if (!cpu_addr) {
 		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
 		goto out;
 	}
 
-	memset(cpu_addr, 0, size*TW_Q_LENGTH);
-
 	for (i = 0; i < TW_Q_LENGTH; i++) {
 		switch(which) {
 		case 0:
diff --git a/drivers/scsi/a100u2w.c b/drivers/scsi/a100u2w.c
index 522570d297ca..7e33a61c1ba4 100644
--- a/drivers/scsi/a100u2w.c
+++ b/drivers/scsi/a100u2w.c
@@ -1125,23 +1125,19 @@ static int inia100_probe_one(struct pci_dev *pdev,
 
 	/* Get total memory needed for SCB */
 	sz = ORC_MAXQUEUE * sizeof(struct orc_scb);
-	host->scb_virt = pci_alloc_consistent(pdev, sz,
-			&host->scb_phys);
+	host->scb_virt = pci_zalloc_consistent(pdev, sz, &host->scb_phys);
 	if (!host->scb_virt) {
 		printk("inia100: SCB memory allocation error\n");
 		goto out_host_put;
 	}
-	memset(host->scb_virt, 0, sz);
 
 	/* Get total memory needed for ESCB */
 	sz = ORC_MAXQUEUE * sizeof(struct orc_extended_scb);
-	host->escb_virt = pci_alloc_consistent(pdev, sz,
-			&host->escb_phys);
+	host->escb_virt = pci_zalloc_consistent(pdev, sz, &host->escb_phys);
 	if (!host->escb_virt) {
 		printk("inia100: ESCB memory allocation error\n");
 		goto out_free_scb_array;
 	}
-	memset(host->escb_virt, 0, sz);
 
 	biosaddr = host->BIOScfg;
 	biosaddr = (biosaddr << 4);
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 56467df3d6de..eb3e3e619155 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -3538,10 +3538,9 @@ static int be_queue_alloc(struct beiscsi_hba *phba, struct be_queue_info *q,
 	q->len = len;
 	q->entry_size = entry_size;
 	mem->size = len * entry_size;
-	mem->va = pci_alloc_consistent(phba->pcidev, mem->size, &mem->dma);
+	mem->va = pci_zalloc_consistent(phba->pcidev, mem->size, &mem->dma);
 	if (!mem->va)
 		return -ENOMEM;
-	memset(mem->va, 0, mem->size);
 	return 0;
 }
 
@@ -4320,9 +4319,9 @@ static int beiscsi_get_boot_info(struct beiscsi_hba *phba)
 			    "BM_%d : No boot session\n");
 		return ret;
 	}
-	nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
-				sizeof(*session_resp),
-				&nonemb_cmd.dma);
+	nonemb_cmd.va = pci_zalloc_consistent(phba->ctrl.pdev,
+					      sizeof(*session_resp),
+					      &nonemb_cmd.dma);
 	if (nonemb_cmd.va == NULL) {
 		beiscsi_log(phba, KERN_ERR,
 			    BEISCSI_LOG_INIT | BEISCSI_LOG_CONFIG,
@@ -4332,7 +4331,6 @@ static int beiscsi_get_boot_info(struct beiscsi_hba *phba)
 		return -ENOMEM;
 	}
 
-	memset(nonemb_cmd.va, 0, sizeof(*session_resp));
 	tag = mgmt_get_session_info(phba, s_handle,
 				    &nonemb_cmd);
 	if (!tag) {
diff --git a/drivers/scsi/be2iscsi/be_mgmt.c b/drivers/scsi/be2iscsi/be_mgmt.c
index a3e56487616c..665afcb74a56 100644
--- a/drivers/scsi/be2iscsi/be_mgmt.c
+++ b/drivers/scsi/be2iscsi/be_mgmt.c
@@ -900,13 +900,12 @@ free_cmd:
 static int mgmt_alloc_cmd_data(struct beiscsi_hba *phba, struct be_dma_mem *cmd,
 			       int iscsi_cmd, int size)
 {
-	cmd->va = pci_alloc_consistent(phba->ctrl.pdev, size, &cmd->dma);
+	cmd->va = pci_zalloc_consistent(phba->ctrl.pdev, size, &cmd->dma);
 	if (!cmd->va) {
 		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 			    "BG_%d : Failed to allocate memory for if info\n");
 		return -ENOMEM;
 	}
-	memset(cmd->va, 0, size);
 	cmd->size = size;
 	be_cmd_hdr_prepare(cmd->va, CMD_SUBSYSTEM_ISCSI, iscsi_cmd, size);
 	return 0;
diff --git a/drivers/scsi/csiostor/csio_wr.c b/drivers/scsi/csiostor/csio_wr.c
index 4255ce264abf..773da14cfa14 100644
--- a/drivers/scsi/csiostor/csio_wr.c
+++ b/drivers/scsi/csiostor/csio_wr.c
@@ -232,7 +232,7 @@ csio_wr_alloc_q(struct csio_hw *hw, uint32_t qsize, uint32_t wrsize,
 
 	q = wrm->q_arr[free_idx];
 
-	q->vstart = pci_alloc_consistent(hw->pdev, qsz, &q->pstart);
+	q->vstart = pci_zalloc_consistent(hw->pdev, qsz, &q->pstart);
 	if (!q->vstart) {
 		csio_err(hw,
 			 "Failed to allocate DMA memory for "
@@ -240,12 +240,6 @@ csio_wr_alloc_q(struct csio_hw *hw, uint32_t qsize, uint32_t wrsize,
 		return -1;
 	}
 
-	/*
-	 * We need to zero out the contents, importantly for ingress,
-	 * since we start with a generatiom bit of 1 for ingress.
-	 */
-	memset(q->vstart, 0, qsz);
-
 	q->type		= type;
 	q->owner	= owner;
 	q->pidx		= q->cidx = q->inc_idx = 0;
diff --git a/drivers/scsi/eata.c b/drivers/scsi/eata.c
index 03372cff38f3..813dd5c998e4 100644
--- a/drivers/scsi/eata.c
+++ b/drivers/scsi/eata.c
@@ -1238,8 +1238,8 @@ static int port_detect(unsigned long port_base, unsigned int j,
 		struct eata_config *cf;
 		dma_addr_t cf_dma_addr;
 
-		cf = pci_alloc_consistent(pdev, sizeof(struct eata_config),
-					  &cf_dma_addr);
+		cf = pci_zalloc_consistent(pdev, sizeof(struct eata_config),
+					   &cf_dma_addr);
 
 		if (!cf) {
 			printk
@@ -1249,7 +1249,6 @@ static int port_detect(unsigned long port_base, unsigned int j,
 		}
 
 		/* Set board configuration */
-		memset((char *)cf, 0, sizeof(struct eata_config));
 		cf->len = (ushort) H2DEV16((ushort) 510);
 		cf->ocena = 1;
 
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 8545d1826725..6b35d0dfe64c 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -4732,23 +4732,21 @@ static struct CommandList *cmd_special_alloc(struct ctlr_info *h)
 	union u64bit temp64;
 	dma_addr_t cmd_dma_handle, err_dma_handle;
 
-	c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
+	c = pci_zalloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle);
 	if (c == NULL)
 		return NULL;
-	memset(c, 0, sizeof(*c));
 
 	c->cmd_type = CMD_SCSI;
 	c->cmdindex = -1;
 
-	c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info),
-		    &err_dma_handle);
+	c->err_info = pci_zalloc_consistent(h->pdev, sizeof(*c->err_info),
+					    &err_dma_handle);
 
 	if (c->err_info == NULL) {
 		pci_free_consistent(h->pdev,
 			sizeof(*c), c, cmd_dma_handle);
 		return NULL;
 	}
-	memset(c->err_info, 0, sizeof(*c->err_info));
 
 	INIT_LIST_HEAD(&c->list);
 	c->busaddr = (u32) cmd_dma_handle;
diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
index e2237a97cb9d..531dce419c18 100644
--- a/drivers/scsi/megaraid/megaraid_mbox.c
+++ b/drivers/scsi/megaraid/megaraid_mbox.c
@@ -998,8 +998,9 @@ megaraid_alloc_cmd_packets(adapter_t *adapter)
 	 * Allocate the common 16-byte aligned memory for the handshake
 	 * mailbox.
 	 */
-	raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
-			sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
+	raid_dev->una_mbox64 = pci_zalloc_consistent(adapter->pdev,
+						     sizeof(mbox64_t),
+						     &raid_dev->una_mbox64_dma);
 
 	if (!raid_dev->una_mbox64) {
 		con_log(CL_ANN, (KERN_WARNING
@@ -1007,7 +1008,6 @@ megaraid_alloc_cmd_packets(adapter_t *adapter)
 			__LINE__));
 		return -1;
 	}
-	memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
 
 	/*
 	 * Align the mailbox at 16-byte boundary
@@ -1026,8 +1026,8 @@ megaraid_alloc_cmd_packets(adapter_t *adapter)
 			align;
 
 	// Allocate memory for commands issued internally
-	adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
-				&adapter->ibuf_dma_h);
+	adapter->ibuf = pci_zalloc_consistent(pdev, MBOX_IBUF_SIZE,
+					      &adapter->ibuf_dma_h);
 	if (!adapter->ibuf) {
 
 		con_log(CL_ANN, (KERN_WARNING
@@ -1036,7 +1036,6 @@ megaraid_alloc_cmd_packets(adapter_t *adapter)
 
 		goto out_free_common_mbox;
 	}
-	memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
 
 	// Allocate memory for our SCSI Command Blocks and their associated
 	// memory
@@ -2972,8 +2971,8 @@ megaraid_mbox_product_info(adapter_t *adapter)
 	 * Issue an ENQUIRY3 command to find out certain adapter parameters,
 	 * e.g., max channels, max commands etc.
 	 */
-	pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
-			&pinfo_dma_h);
+	pinfo = pci_zalloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
+				      &pinfo_dma_h);
 
 	if (pinfo == NULL) {
 		con_log(CL_ANN, (KERN_WARNING
@@ -2982,7 +2981,6 @@ megaraid_mbox_product_info(adapter_t *adapter)
 
 		return -1;
 	}
-	memset(pinfo, 0, sizeof(mraid_pinfo_t));
 
 	mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
 	memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 112799b131a9..22a04e37b70a 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -2038,9 +2038,9 @@ int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
 
 	if (initial) {
 		instance->hb_host_mem =
-			pci_alloc_consistent(instance->pdev,
-					     sizeof(struct MR_CTRL_HB_HOST_MEM),
-					     &instance->hb_host_mem_h);
+			pci_zalloc_consistent(instance->pdev,
+					      sizeof(struct MR_CTRL_HB_HOST_MEM),
+					      &instance->hb_host_mem_h);
 		if (!instance->hb_host_mem) {
 			printk(KERN_DEBUG "megasas: SR-IOV: Couldn't allocate"
 			       " memory for heartbeat host memory for "
@@ -2048,8 +2048,6 @@ int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
 			retval = -ENOMEM;
 			goto out;
 		}
-		memset(instance->hb_host_mem, 0,
-		       sizeof(struct MR_CTRL_HB_HOST_MEM));
 	}
 
 	memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c
index 7a6160f172ce..57a95e2c3442 100644
--- a/drivers/scsi/mesh.c
+++ b/drivers/scsi/mesh.c
@@ -1915,14 +1915,12 @@ static int mesh_probe(struct macio_dev *mdev, const struct of_device_id *match)
 	/* We use the PCI APIs for now until the generic one gets fixed
 	 * enough or until we get some macio-specific versions
 	 */
-	dma_cmd_space = pci_alloc_consistent(macio_get_pci_dev(mdev),
-					     ms->dma_cmd_size,
-					     &dma_cmd_bus);
+	dma_cmd_space = pci_zalloc_consistent(macio_get_pci_dev(mdev),
+					      ms->dma_cmd_size, &dma_cmd_bus);
 	if (dma_cmd_space == NULL) {
 		printk(KERN_ERR "mesh: can't allocate DMA table\n");
 		goto out_unmap;
 	}
-	memset(dma_cmd_space, 0, ms->dma_cmd_size);
 
 	ms->dma_cmds = (struct dbdma_cmd *) DBDMA_ALIGN(dma_cmd_space);
        	ms->dma_cmd_space = dma_cmd_space;
diff --git a/drivers/scsi/mvumi.c b/drivers/scsi/mvumi.c
index edbee8dc62c9..3e716b2f611a 100644
--- a/drivers/scsi/mvumi.c
+++ b/drivers/scsi/mvumi.c
@@ -142,8 +142,8 @@ static struct mvumi_res *mvumi_alloc_mem_resource(struct mvumi_hba *mhba,
 
 	case RESOURCE_UNCACHED_MEMORY:
 		size = round_up(size, 8);
-		res->virt_addr = pci_alloc_consistent(mhba->pdev, size,
-							&res->bus_addr);
+		res->virt_addr = pci_zalloc_consistent(mhba->pdev, size,
+						       &res->bus_addr);
 		if (!res->virt_addr) {
 			dev_err(&mhba->pdev->dev,
 					"unable to allocate consistent mem,"
@@ -151,7 +151,6 @@ static struct mvumi_res *mvumi_alloc_mem_resource(struct mvumi_hba *mhba,
 			kfree(res);
 			return NULL;
 		}
-		memset(res->virt_addr, 0, size);
 		break;
 
 	default:
@@ -258,12 +257,10 @@ static int mvumi_internal_cmd_sgl(struct mvumi_hba *mhba, struct mvumi_cmd *cmd,
 	if (size == 0)
 		return 0;
 
-	virt_addr = pci_alloc_consistent(mhba->pdev, size, &phy_addr);
+	virt_addr = pci_zalloc_consistent(mhba->pdev, size, &phy_addr);
 	if (!virt_addr)
 		return -1;
 
-	memset(virt_addr, 0, size);
-
 	m_sg = (struct mvumi_sgl *) &cmd->frame->payload[0];
 	cmd->frame->sg_counts = 1;
 	cmd->data_buf = virt_addr;
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
index 34cea8291772..76570e6a547d 100644
--- a/drivers/scsi/pm8001/pm8001_sas.c
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -116,13 +116,12 @@ int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
 	u64 align_offset = 0;
 	if (align)
 		align_offset = (dma_addr_t)align - 1;
-	mem_virt_alloc =
-		pci_alloc_consistent(pdev, mem_size + align, &mem_dma_handle);
+	mem_virt_alloc = pci_zalloc_consistent(pdev, mem_size + align,
+					       &mem_dma_handle);
 	if (!mem_virt_alloc) {
 		pm8001_printk("memory allocation error\n");
 		return -1;
 	}
-	memset((void *)mem_virt_alloc, 0, mem_size+align);
 	*pphys_addr = mem_dma_handle;
 	phys_align = (*pphys_addr + align_offset) & ~align_offset;
 	*virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index 017f8b9554e5..6f3275d020a0 100644
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -4213,9 +4213,9 @@ static ssize_t pmcraid_store_log_level(
 {
 	struct Scsi_Host *shost;
 	struct pmcraid_instance *pinstance;
-	unsigned long val;
+	u8 val;
 
-	if (strict_strtoul(buf, 10, &val))
+	if (kstrtou8(buf, 10, &val))
 		return -EINVAL;
 	/* log-level should be from 0 to 2 */
 	if (val > 2)
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 406b3038bbad..8b4105a22ac2 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -910,9 +910,9 @@ sdev_store_queue_ramp_up_period(struct device *dev,
 				const char *buf, size_t count)
 {
 	struct scsi_device *sdev = to_scsi_device(dev);
-	unsigned long period;
+	unsigned int period;
 
-	if (strict_strtoul(buf, 10, &period))
+	if (kstrtouint(buf, 10, &period))
 		return -EINVAL;
 
 	sdev->queue_ramp_up_period = msecs_to_jiffies(period);
diff --git a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
index 2920e406030a..5729cf678765 100644
--- a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
+++ b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
@@ -2065,20 +2065,16 @@ static short rtl8192_alloc_rx_desc_ring(struct net_device *dev)
 	int i, rx_queue_idx;
 
 	for (rx_queue_idx = 0; rx_queue_idx < MAX_RX_QUEUE; rx_queue_idx++) {
-		priv->rx_ring[rx_queue_idx] = pci_alloc_consistent(priv->pdev,
-					sizeof(*priv->rx_ring[rx_queue_idx]) *
-					priv->rxringcount,
-					&priv->rx_ring_dma[rx_queue_idx]);
-
+		priv->rx_ring[rx_queue_idx] =
+			pci_zalloc_consistent(priv->pdev,
+					      sizeof(*priv->rx_ring[rx_queue_idx]) * priv->rxringcount,
+					      &priv->rx_ring_dma[rx_queue_idx]);
 		if (!priv->rx_ring[rx_queue_idx] ||
 		    (unsigned long)priv->rx_ring[rx_queue_idx] & 0xFF) {
 			RT_TRACE(COMP_ERR, "Cannot allocate RX ring\n");
 			return -ENOMEM;
 		}
 
-		memset(priv->rx_ring[rx_queue_idx], 0,
-		       sizeof(*priv->rx_ring[rx_queue_idx]) *
-		       priv->rxringcount);
 		priv->rx_idx[rx_queue_idx] = 0;
 
 		for (i = 0; i < priv->rxringcount; i++) {
@@ -2118,14 +2114,13 @@ static int rtl8192_alloc_tx_desc_ring(struct net_device *dev,
 	dma_addr_t dma;
 	int i;
 
-	ring = pci_alloc_consistent(priv->pdev, sizeof(*ring) * entries, &dma);
+	ring = pci_zalloc_consistent(priv->pdev, sizeof(*ring) * entries, &dma);
 	if (!ring || (unsigned long)ring & 0xFF) {
 		RT_TRACE(COMP_ERR, "Cannot allocate TX ring (prio = %d)\n",
 			 prio);
 		return -ENOMEM;
 	}
 
-	memset(ring, 0, sizeof(*ring)*entries);
 	priv->tx_ring[prio].desc = ring;
 	priv->tx_ring[prio].dma = dma;
 	priv->tx_ring[prio].idx = 0;
diff --git a/drivers/staging/rtl8192ee/pci.c b/drivers/staging/rtl8192ee/pci.c
index f3abbcc9f3ba..0215aef1eacc 100644
--- a/drivers/staging/rtl8192ee/pci.c
+++ b/drivers/staging/rtl8192ee/pci.c
@@ -1224,10 +1224,10 @@ static int _rtl_pci_init_tx_ring(struct ieee80211_hw *hw,
 
 	/* alloc tx buffer desc for new trx flow*/
 	if (rtlpriv->use_new_trx_flow) {
-		buffer_desc = pci_alloc_consistent(rtlpci->pdev,
-					sizeof(*buffer_desc) * entries,
-					&buffer_desc_dma);
-
+		buffer_desc =
+			pci_zalloc_consistent(rtlpci->pdev,
+					      sizeof(*buffer_desc) * entries,
+					      &buffer_desc_dma);
 		if (!buffer_desc || (unsigned long)buffer_desc & 0xFF) {
 			RT_TRACE(COMP_ERR, DBG_EMERG,
 				 ("Cannot allocate TX ring (prio = %d)\n",
@@ -1235,7 +1235,6 @@ static int _rtl_pci_init_tx_ring(struct ieee80211_hw *hw,
 			return -ENOMEM;
 		}
 
-		memset(buffer_desc, 0, sizeof(*buffer_desc) * entries);
 		rtlpci->tx_ring[prio].buffer_desc = buffer_desc;
 		rtlpci->tx_ring[prio].buffer_desc_dma = buffer_desc_dma;
 
@@ -1245,16 +1244,14 @@ static int _rtl_pci_init_tx_ring(struct ieee80211_hw *hw,
 	}
 
 	/* alloc dma for this ring */
-	desc = pci_alloc_consistent(rtlpci->pdev,
-				    sizeof(*desc) * entries, &desc_dma);
-
+	desc = pci_zalloc_consistent(rtlpci->pdev, sizeof(*desc) * entries,
+				     &desc_dma);
 	if (!desc || (unsigned long)desc & 0xFF) {
 		RT_TRACE(COMP_ERR, DBG_EMERG,
 			 ("Cannot allocate TX ring (prio = %d)\n", prio));
 		return -ENOMEM;
 	}
 
-	memset(desc, 0, sizeof(*desc) * entries);
 	rtlpci->tx_ring[prio].desc = desc;
 	rtlpci->tx_ring[prio].dma = desc_dma;
 
@@ -1290,11 +1287,9 @@ static int _rtl_pci_init_rx_ring(struct ieee80211_hw *hw, int rxring_idx)
 		struct rtl_rx_buffer_desc *entry = NULL;
 		/* alloc dma for this ring */
 		rtlpci->rx_ring[rxring_idx].buffer_desc =
-		    pci_alloc_consistent(rtlpci->pdev,
-					 sizeof(*rtlpci->rx_ring[rxring_idx].
-						buffer_desc) *
-						rtlpci->rxringcount,
-					 &rtlpci->rx_ring[rxring_idx].dma);
+			pci_zalloc_consistent(rtlpci->pdev,
+					      sizeof(*rtlpci->rx_ring[rxring_idx].buffer_desc) * rtlpci->rxringcount,
+					      &rtlpci->rx_ring[rxring_idx].dma);
 		if (!rtlpci->rx_ring[rxring_idx].buffer_desc ||
 		    (unsigned long)rtlpci->rx_ring[rxring_idx].buffer_desc & 0xFF) {
 			RT_TRACE(COMP_ERR, DBG_EMERG,
@@ -1302,10 +1297,6 @@ static int _rtl_pci_init_rx_ring(struct ieee80211_hw *hw, int rxring_idx)
 			return -ENOMEM;
 		}
 
-		memset(rtlpci->rx_ring[rxring_idx].buffer_desc, 0,
-		       sizeof(*rtlpci->rx_ring[rxring_idx].buffer_desc) *
-		       rtlpci->rxringcount);
-
 		/* init every desc in this ring */
 		rtlpci->rx_ring[rxring_idx].idx = 0;
 
@@ -1320,19 +1311,15 @@ static int _rtl_pci_init_rx_ring(struct ieee80211_hw *hw, int rxring_idx)
 		u8 tmp_one = 1;
 		/* alloc dma for this ring */
 		rtlpci->rx_ring[rxring_idx].desc =
-		    pci_alloc_consistent(rtlpci->pdev,
-					 sizeof(*rtlpci->rx_ring[rxring_idx].
-					desc) * rtlpci->rxringcount,
-					 &rtlpci->rx_ring[rxring_idx].dma);
+			pci_zalloc_consistent(rtlpci->pdev,
+					      sizeof(*rtlpci->rx_ring[rxring_idx].desc) * rtlpci->rxringcount,
+					      &rtlpci->rx_ring[rxring_idx].dma);
 		if (!rtlpci->rx_ring[rxring_idx].desc ||
 		    (unsigned long)rtlpci->rx_ring[rxring_idx].desc & 0xFF) {
 			RT_TRACE(COMP_ERR, DBG_EMERG,
 				 ("Cannot allocate RX ring\n"));
 			return -ENOMEM;
 		}
-		memset(rtlpci->rx_ring[rxring_idx].desc, 0,
-		       sizeof(*rtlpci->rx_ring[rxring_idx].desc) *
-		       rtlpci->rxringcount);
 
 		/* init every desc in this ring */
 		rtlpci->rx_ring[rxring_idx].idx = 0;
diff --git a/drivers/staging/rtl8821ae/pci.c b/drivers/staging/rtl8821ae/pci.c
index f9847d1fbdeb..26d7b2fc852a 100644
--- a/drivers/staging/rtl8821ae/pci.c
+++ b/drivers/staging/rtl8821ae/pci.c
@@ -1248,9 +1248,10 @@ static int _rtl_pci_init_tx_ring(struct ieee80211_hw *hw,
 
 	/* alloc tx buffer desc for new trx flow*/
 	if (rtlpriv->use_new_trx_flow) {
-		buffer_desc = pci_alloc_consistent(rtlpci->pdev,
-					    sizeof(*buffer_desc) * entries,
-					    &buffer_desc_dma);
+		buffer_desc =
+			pci_zalloc_consistent(rtlpci->pdev,
+					      sizeof(*buffer_desc) * entries,
+					      &buffer_desc_dma);
 
 		if (!buffer_desc || (unsigned long)buffer_desc & 0xFF) {
 			RT_TRACE(COMP_ERR, DBG_EMERG,
@@ -1259,7 +1260,6 @@ static int _rtl_pci_init_tx_ring(struct ieee80211_hw *hw,
 			return -ENOMEM;
 		}
 
-		memset(buffer_desc, 0, sizeof(*buffer_desc) * entries);
 		rtlpci->tx_ring[prio].buffer_desc = buffer_desc;
 		rtlpci->tx_ring[prio].buffer_desc_dma = buffer_desc_dma;
 
@@ -1270,8 +1270,8 @@ static int _rtl_pci_init_tx_ring(struct ieee80211_hw *hw,
 	}
 
 	/* alloc dma for this ring */
-	desc = pci_alloc_consistent(rtlpci->pdev,
-				    sizeof(*desc) * entries, &desc_dma);
+	desc = pci_zalloc_consistent(rtlpci->pdev, sizeof(*desc) * entries,
+				     &desc_dma);
 
 	if (!desc || (unsigned long)desc & 0xFF) {
 		RT_TRACE(COMP_ERR, DBG_EMERG,
@@ -1279,7 +1279,6 @@ static int _rtl_pci_init_tx_ring(struct ieee80211_hw *hw,
 		return -ENOMEM;
 	}
 
-	memset(desc, 0, sizeof(*desc) * entries);
 	rtlpci->tx_ring[prio].desc = desc;
 	rtlpci->tx_ring[prio].dma = desc_dma;
 
@@ -1316,21 +1315,15 @@ static int _rtl_pci_init_rx_ring(struct ieee80211_hw *hw, int rxring_idx)
 		struct rtl_rx_buffer_desc *entry = NULL;
 		/* alloc dma for this ring */
 		rtlpci->rx_ring[rxring_idx].buffer_desc =
-		    pci_alloc_consistent(rtlpci->pdev,
-					 sizeof(*rtlpci->rx_ring[rxring_idx].
-					        buffer_desc) *
-					        rtlpci->rxringcount,
-					 &rtlpci->rx_ring[rxring_idx].dma);
+			pci_zalloc_consistent(rtlpci->pdev,
+					      sizeof(*rtlpci->rx_ring[rxring_idx].buffer_desc) * rtlpci->rxringcount,
+					      &rtlpci->rx_ring[rxring_idx].dma);
 		if (!rtlpci->rx_ring[rxring_idx].buffer_desc ||
 		    (unsigned long)rtlpci->rx_ring[rxring_idx].buffer_desc & 0xFF) {
 			RT_TRACE(COMP_ERR, DBG_EMERG, ("Cannot allocate RX ring\n"));
 			return -ENOMEM;
 		}
 
-		memset(rtlpci->rx_ring[rxring_idx].buffer_desc, 0,
-		       sizeof(*rtlpci->rx_ring[rxring_idx].buffer_desc) *
-		       rtlpci->rxringcount);
-
 		/* init every desc in this ring */
 		rtlpci->rx_ring[rxring_idx].idx = 0;
 		for (i = 0; i < rtlpci->rxringcount; i++) {
@@ -1344,10 +1337,9 @@ static int _rtl_pci_init_rx_ring(struct ieee80211_hw *hw, int rxring_idx)
 		u8 tmp_one = 1;
 		/* alloc dma for this ring */
 		rtlpci->rx_ring[rxring_idx].desc =
-		    pci_alloc_consistent(rtlpci->pdev,
-					 sizeof(*rtlpci->rx_ring[rxring_idx].
-					        desc) * rtlpci->rxringcount,
-					 &rtlpci->rx_ring[rxring_idx].dma);
+			pci_zalloc_consistent(rtlpci->pdev,
+					      sizeof(*rtlpci->rx_ring[rxring_idx].desc) * rtlpci->rxringcount,
+					      &rtlpci->rx_ring[rxring_idx].dma);
 		if (!rtlpci->rx_ring[rxring_idx].desc ||
 		    (unsigned long)rtlpci->rx_ring[rxring_idx].desc & 0xFF) {
 			RT_TRACE(COMP_ERR, DBG_EMERG,
@@ -1355,10 +1347,6 @@ static int _rtl_pci_init_rx_ring(struct ieee80211_hw *hw, int rxring_idx)
 			return -ENOMEM;
 		}
 
-		memset(rtlpci->rx_ring[rxring_idx].desc, 0,
-		       sizeof(*rtlpci->rx_ring[rxring_idx].desc) *
-		       rtlpci->rxringcount);
-
 		/* init every desc in this ring */
 		rtlpci->rx_ring[rxring_idx].idx = 0;
 		for (i = 0; i < rtlpci->rxringcount; i++) {
diff --git a/drivers/staging/slicoss/slicoss.c b/drivers/staging/slicoss/slicoss.c
index 50ece291fc6a..f35fa3dfe22c 100644
--- a/drivers/staging/slicoss/slicoss.c
+++ b/drivers/staging/slicoss/slicoss.c
@@ -1191,18 +1191,15 @@ static int slic_rspqueue_init(struct adapter *adapter)
 	rspq->num_pages = SLIC_RSPQ_PAGES_GB;
 
 	for (i = 0; i < rspq->num_pages; i++) {
-		rspq->vaddr[i] = pci_alloc_consistent(adapter->pcidev,
-						      PAGE_SIZE,
-						      &rspq->paddr[i]);
+		rspq->vaddr[i] = pci_zalloc_consistent(adapter->pcidev,
+						       PAGE_SIZE,
+						       &rspq->paddr[i]);
 		if (!rspq->vaddr[i]) {
 			dev_err(&adapter->pcidev->dev,
 				"pci_alloc_consistent failed\n");
 			slic_rspqueue_free(adapter);
 			return -ENOMEM;
 		}
-		/* FIXME:
-		 * do we really need this assertions (4K PAGE_SIZE aligned addr)? */
-		memset(rspq->vaddr[i], 0, PAGE_SIZE);
 
 		if (paddrh == 0) {
 			slic_reg32_write(&slic_regs->slic_rbar,
diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c
index c78d06eff7ea..0b583a37f5b3 100644
--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -1111,25 +1111,17 @@ static bool device_init_rings(PSDevice pDevice)
 	void *vir_pool;
 
 	/*allocate all RD/TD rings a single pool*/
-	vir_pool = pci_alloc_consistent(pDevice->pcid,
-					pDevice->sOpts.nRxDescs0 * sizeof(SRxDesc) +
-					pDevice->sOpts.nRxDescs1 * sizeof(SRxDesc) +
-					pDevice->sOpts.nTxDescs[0] * sizeof(STxDesc) +
-					pDevice->sOpts.nTxDescs[1] * sizeof(STxDesc),
-					&pDevice->pool_dma);
-
+	vir_pool = pci_zalloc_consistent(pDevice->pcid,
+					 pDevice->sOpts.nRxDescs0 * sizeof(SRxDesc) +
+					 pDevice->sOpts.nRxDescs1 * sizeof(SRxDesc) +
+					 pDevice->sOpts.nTxDescs[0] * sizeof(STxDesc) +
+					 pDevice->sOpts.nTxDescs[1] * sizeof(STxDesc),
+					 &pDevice->pool_dma);
 	if (vir_pool == NULL) {
 		DBG_PRT(MSG_LEVEL_ERR, KERN_ERR "%s : allocate desc dma memory failed\n", pDevice->dev->name);
 		return false;
 	}
 
-	memset(vir_pool, 0,
-	       pDevice->sOpts.nRxDescs0 * sizeof(SRxDesc) +
-	       pDevice->sOpts.nRxDescs1 * sizeof(SRxDesc) +
-	       pDevice->sOpts.nTxDescs[0] * sizeof(STxDesc) +
-	       pDevice->sOpts.nTxDescs[1] * sizeof(STxDesc)
-		);
-
 	pDevice->aRD0Ring = vir_pool;
 	pDevice->aRD1Ring = vir_pool +
 		pDevice->sOpts.nRxDescs0 * sizeof(SRxDesc);
@@ -1138,13 +1130,12 @@ static bool device_init_rings(PSDevice pDevice)
 	pDevice->rd1_pool_dma = pDevice->rd0_pool_dma +
 		pDevice->sOpts.nRxDescs0 * sizeof(SRxDesc);
 
-	pDevice->tx0_bufs = pci_alloc_consistent(pDevice->pcid,
-						 pDevice->sOpts.nTxDescs[0] * PKT_BUF_SZ +
-						 pDevice->sOpts.nTxDescs[1] * PKT_BUF_SZ +
-						 CB_BEACON_BUF_SIZE +
-						 CB_MAX_BUF_SIZE,
-						 &pDevice->tx_bufs_dma0);
-
+	pDevice->tx0_bufs = pci_zalloc_consistent(pDevice->pcid,
+						  pDevice->sOpts.nTxDescs[0] * PKT_BUF_SZ +
+						  pDevice->sOpts.nTxDescs[1] * PKT_BUF_SZ +
+						  CB_BEACON_BUF_SIZE +
+						  CB_MAX_BUF_SIZE,
+						  &pDevice->tx_bufs_dma0);
 	if (pDevice->tx0_bufs == NULL) {
 		DBG_PRT(MSG_LEVEL_ERR, KERN_ERR "%s: allocate buf dma memory failed\n", pDevice->dev->name);
 		pci_free_consistent(pDevice->pcid,
@@ -1157,13 +1148,6 @@ static bool device_init_rings(PSDevice pDevice)
 		return false;
 	}
 
-	memset(pDevice->tx0_bufs, 0,
-	       pDevice->sOpts.nTxDescs[0] * PKT_BUF_SZ +
-	       pDevice->sOpts.nTxDescs[1] * PKT_BUF_SZ +
-	       CB_BEACON_BUF_SIZE +
-	       CB_MAX_BUF_SIZE
-		);
-
 	pDevice->td0_pool_dma = pDevice->rd1_pool_dma +
 		pDevice->sOpts.nRxDescs1 * sizeof(SRxDesc);
 
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index ba1dbcdf4609..0e8c39b6ccd4 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -3383,12 +3383,11 @@ static int alloc_desc(struct slgt_info *info)
 	unsigned int pbufs;
 
 	/* allocate memory to hold descriptor lists */
-	info->bufs = pci_alloc_consistent(info->pdev, DESC_LIST_SIZE, &info->bufs_dma_addr);
+	info->bufs = pci_zalloc_consistent(info->pdev, DESC_LIST_SIZE,
+					   &info->bufs_dma_addr);
 	if (info->bufs == NULL)
 		return -ENOMEM;
 
-	memset(info->bufs, 0, DESC_LIST_SIZE);
-
 	info->rbufs = (struct slgt_desc*)info->bufs;
 	info->tbufs = ((struct slgt_desc*)info->bufs) + info->rbuf_count;
 
diff --git a/drivers/vme/bridges/vme_ca91cx42.c b/drivers/vme/bridges/vme_ca91cx42.c
index bfb2d3f06738..18078ecbfcc6 100644
--- a/drivers/vme/bridges/vme_ca91cx42.c
+++ b/drivers/vme/bridges/vme_ca91cx42.c
@@ -1555,16 +1555,14 @@ static int ca91cx42_crcsr_init(struct vme_bridge *ca91cx42_bridge,
 	}
 
 	/* Allocate mem for CR/CSR image */
-	bridge->crcsr_kernel = pci_alloc_consistent(pdev, VME_CRCSR_BUF_SIZE,
-		&bridge->crcsr_bus);
+	bridge->crcsr_kernel = pci_zalloc_consistent(pdev, VME_CRCSR_BUF_SIZE,
+						     &bridge->crcsr_bus);
 	if (bridge->crcsr_kernel == NULL) {
 		dev_err(&pdev->dev, "Failed to allocate memory for CR/CSR "
 			"image\n");
 		return -ENOMEM;
 	}
 
-	memset(bridge->crcsr_kernel, 0, VME_CRCSR_BUF_SIZE);
-
 	crcsr_addr = slot * (512 * 1024);
 	iowrite32(bridge->crcsr_bus - crcsr_addr, bridge->base + VCSR_TO);
 
diff --git a/drivers/vme/bridges/vme_tsi148.c b/drivers/vme/bridges/vme_tsi148.c
index 61e706c0e00c..e07cfa8001bb 100644
--- a/drivers/vme/bridges/vme_tsi148.c
+++ b/drivers/vme/bridges/vme_tsi148.c
@@ -2275,16 +2275,14 @@ static int tsi148_crcsr_init(struct vme_bridge *tsi148_bridge,
 	bridge = tsi148_bridge->driver_priv;
 
 	/* Allocate mem for CR/CSR image */
-	bridge->crcsr_kernel = pci_alloc_consistent(pdev, VME_CRCSR_BUF_SIZE,
-		&bridge->crcsr_bus);
+	bridge->crcsr_kernel = pci_zalloc_consistent(pdev, VME_CRCSR_BUF_SIZE,
+						     &bridge->crcsr_bus);
 	if (bridge->crcsr_kernel == NULL) {
 		dev_err(tsi148_bridge->parent, "Failed to allocate memory for "
 			"CR/CSR image\n");
 		return -ENOMEM;
 	}
 
-	memset(bridge->crcsr_kernel, 0, VME_CRCSR_BUF_SIZE);
-
 	reg_split(bridge->crcsr_bus, &crcsr_bus_high, &crcsr_bus_low);
 
 	iowrite32be(crcsr_bus_high, bridge->base + TSI148_LCSR_CROU);
diff --git a/fs/adfs/adfs.h b/fs/adfs/adfs.h
index c770337c4b45..24575d9d882d 100644
--- a/fs/adfs/adfs.h
+++ b/fs/adfs/adfs.h
@@ -153,6 +153,7 @@ extern int adfs_map_lookup(struct super_block *sb, unsigned int frag_id, unsigne
 extern unsigned int adfs_map_free(struct super_block *sb);
 
 /* Misc */
+__printf(3, 4)
 void __adfs_error(struct super_block *sb, const char *function,
 		  const char *fmt, ...);
 #define adfs_error(sb, fmt...) __adfs_error(sb, __func__, fmt)
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index 0d138c0de293..51c279a29845 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -138,7 +138,7 @@ adfs_dir_lookup_byname(struct inode *inode, struct qstr *name, struct object_inf
 		goto out;
 
 	if (ADFS_I(inode)->parent_id != dir.parent_id) {
-		adfs_error(sb, "parent directory changed under me! (%lx but got %lx)\n",
+		adfs_error(sb, "parent directory changed under me! (%lx but got %x)\n",
 			   ADFS_I(inode)->parent_id, dir.parent_id);
 		ret = -EIO;
 		goto free_out;
diff --git a/fs/adfs/dir_fplus.c b/fs/adfs/dir_fplus.c
index d9e3bee4e653..f2ba88ab4aed 100644
--- a/fs/adfs/dir_fplus.c
+++ b/fs/adfs/dir_fplus.c
@@ -55,10 +55,10 @@ adfs_fplus_read(struct super_block *sb, unsigned int id, unsigned int sz, struct
 	}
 
 	size >>= sb->s_blocksize_bits;
-	if (size > sizeof(dir->bh)/sizeof(dir->bh[0])) {
+	if (size > ARRAY_SIZE(dir->bh)) {
 		/* this directory is too big for fixed bh set, must allocate */
 		struct buffer_head **bh_fplus =
-			kzalloc(size * sizeof(struct buffer_head *),
+			kcalloc(size, sizeof(struct buffer_head *),
 				GFP_KERNEL);
 		if (!bh_fplus) {
 			adfs_error(sb, "not enough memory for"
@@ -79,9 +79,8 @@ adfs_fplus_read(struct super_block *sb, unsigned int id, unsigned int sz, struct
 
 		dir->bh_fplus[blk] = sb_bread(sb, block);
 		if (!dir->bh_fplus[blk]) {
-			adfs_error(sb,	"dir object %X failed read for"
-					" offset %d, mapped block %X",
-					id, blk, block);
+			adfs_error(sb,	"dir object %x failed read for offset %d, mapped block %lX",
+				   id, blk, block);
 			goto out;
 		}
 
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index acf32054edd8..9e359fb20c0a 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -143,20 +143,6 @@ static inline int autofs4_oz_mode(struct autofs_sb_info *sbi) {
 	return sbi->catatonic || task_pgrp(current) == sbi->oz_pgrp;
 }
 
-/* Does a dentry have some pending activity? */
-static inline int autofs4_ispending(struct dentry *dentry)
-{
-	struct autofs_info *inf = autofs4_dentry_ino(dentry);
-
-	if (inf->flags & AUTOFS_INF_PENDING)
-		return 1;
-
-	if (inf->flags & AUTOFS_INF_EXPIRING)
-		return 1;
-
-	return 0;
-}
-
 struct inode *autofs4_get_inode(struct super_block *, umode_t);
 void autofs4_free_ino(struct autofs_info *);
 
@@ -191,55 +177,6 @@ extern const struct file_operations autofs4_root_operations;
 extern const struct dentry_operations autofs4_dentry_operations;
 
 /* VFS automount flags management functions */
-
-static inline void __managed_dentry_set_automount(struct dentry *dentry)
-{
-	dentry->d_flags |= DCACHE_NEED_AUTOMOUNT;
-}
-
-static inline void managed_dentry_set_automount(struct dentry *dentry)
-{
-	spin_lock(&dentry->d_lock);
-	__managed_dentry_set_automount(dentry);
-	spin_unlock(&dentry->d_lock);
-}
-
-static inline void __managed_dentry_clear_automount(struct dentry *dentry)
-{
-	dentry->d_flags &= ~DCACHE_NEED_AUTOMOUNT;
-}
-
-static inline void managed_dentry_clear_automount(struct dentry *dentry)
-{
-	spin_lock(&dentry->d_lock);
-	__managed_dentry_clear_automount(dentry);
-	spin_unlock(&dentry->d_lock);
-}
-
-static inline void __managed_dentry_set_transit(struct dentry *dentry)
-{
-	dentry->d_flags |= DCACHE_MANAGE_TRANSIT;
-}
-
-static inline void managed_dentry_set_transit(struct dentry *dentry)
-{
-	spin_lock(&dentry->d_lock);
-	__managed_dentry_set_transit(dentry);
-	spin_unlock(&dentry->d_lock);
-}
-
-static inline void __managed_dentry_clear_transit(struct dentry *dentry)
-{
-	dentry->d_flags &= ~DCACHE_MANAGE_TRANSIT;
-}
-
-static inline void managed_dentry_clear_transit(struct dentry *dentry)
-{
-	spin_lock(&dentry->d_lock);
-	__managed_dentry_clear_transit(dentry);
-	spin_unlock(&dentry->d_lock);
-}
-
 static inline void __managed_dentry_set_managed(struct dentry *dentry)
 {
 	dentry->d_flags |= (DCACHE_NEED_AUTOMOUNT|DCACHE_MANAGE_TRANSIT);
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 394e90b02c5e..a7be57e39be7 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -333,7 +333,6 @@ struct dentry *autofs4_expire_direct(struct super_block *sb,
 	if (ino->flags & AUTOFS_INF_PENDING)
 		goto out;
 	if (!autofs4_direct_busy(mnt, root, timeout, do_now)) {
-		struct autofs_info *ino = autofs4_dentry_ino(root);
 		ino->flags |= AUTOFS_INF_EXPIRING;
 		init_completion(&ino->expire_complete);
 		spin_unlock(&sbi->fs_lock);
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index cc87c1abac97..cdb25ebccc4c 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -166,8 +166,10 @@ static struct dentry *autofs4_lookup_active(struct dentry *dentry)
 	const unsigned char *str = name->name;
 	struct list_head *p, *head;
 
-	spin_lock(&sbi->lookup_lock);
 	head = &sbi->active_list;
+	if (list_empty(head))
+		return NULL;
+	spin_lock(&sbi->lookup_lock);
 	list_for_each(p, head) {
 		struct autofs_info *ino;
 		struct dentry *active;
@@ -218,8 +220,10 @@ static struct dentry *autofs4_lookup_expiring(struct dentry *dentry)
 	const unsigned char *str = name->name;
 	struct list_head *p, *head;
 
-	spin_lock(&sbi->lookup_lock);
 	head = &sbi->expiring_list;
+	if (list_empty(head))
+		return NULL;
+	spin_lock(&sbi->lookup_lock);
 	list_for_each(p, head) {
 		struct autofs_info *ino;
 		struct dentry *expiring;
@@ -373,7 +377,7 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
 		 * this because the leaves of the directory tree under the
 		 * mount never trigger mounts themselves (they have an autofs
 		 * trigger mount mounted on them). But v4 pseudo direct mounts
-		 * do need the leaves to to trigger mounts. In this case we
+		 * do need the leaves to trigger mounts. In this case we
 		 * have no choice but to use the list_empty() check and
 		 * require user space behave.
 		 */
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 0d6c07cc1149..4cf61ec6b7a8 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -832,16 +832,14 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
 		    (befs_super_block *) ((void *) bh->b_data + x86_sb_off);
 	}
 
-	if (befs_load_sb(sb, disk_sb) != BEFS_OK)
+	if ((befs_load_sb(sb, disk_sb) != BEFS_OK) ||
+	    (befs_check_sb(sb) != BEFS_OK))
 		goto unacquire_bh;
 
 	befs_dump_super_block(sb, disk_sb);
 
 	brelse(bh);
 
-	if (befs_check_sb(sb) != BEFS_OK)
-		goto unacquire_priv_sbp;
-
 	if( befs_sb->num_blocks > ~((sector_t)0) ) {
 		befs_error(sb, "blocks count: %llu "
 			"is larger than the host can use",
diff --git a/fs/bfs/bfs.h b/fs/bfs/bfs.h
index f7f87e233dd9..f40006db36df 100644
--- a/fs/bfs/bfs.h
+++ b/fs/bfs/bfs.h
@@ -46,6 +46,7 @@ static inline struct bfs_inode_info *BFS_I(struct inode *inode)
 
 /* inode.c */
 extern struct inode *bfs_iget(struct super_block *sb, unsigned long ino);
+extern void bfs_dump_imap(const char *, struct super_block *);
 
 /* file.c */
 extern const struct inode_operations bfs_file_inops;
diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c
index a399e6d9dc74..08063ae0a17c 100644
--- a/fs/bfs/dir.c
+++ b/fs/bfs/dir.c
@@ -75,8 +75,6 @@ const struct file_operations bfs_dir_operations = {
 	.llseek		= generic_file_llseek,
 };
 
-extern void dump_imap(const char *, struct super_block *);
-
 static int bfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 						bool excl)
 {
@@ -110,7 +108,7 @@ static int bfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 	BFS_I(inode)->i_eblock = 0;
 	insert_inode_hash(inode);
         mark_inode_dirty(inode);
-	dump_imap("create", s);
+	bfs_dump_imap("create", s);
 
 	err = bfs_add_entry(dir, dentry->d_name.name, dentry->d_name.len,
 							inode->i_ino);
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 7041ac35ace8..90bc079d9982 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -30,8 +30,6 @@ MODULE_LICENSE("GPL");
 #define dprintf(x...)
 #endif
 
-void dump_imap(const char *prefix, struct super_block *s);
-
 struct inode *bfs_iget(struct super_block *sb, unsigned long ino)
 {
 	struct bfs_inode *di;
@@ -194,7 +192,7 @@ static void bfs_evict_inode(struct inode *inode)
 			info->si_freeb += bi->i_eblock + 1 - bi->i_sblock;
 		info->si_freei++;
 		clear_bit(ino, info->si_imap);
-		dump_imap("delete_inode", s);
+		bfs_dump_imap("delete_inode", s);
         }
 
 	/*
@@ -297,7 +295,7 @@ static const struct super_operations bfs_sops = {
 	.statfs		= bfs_statfs,
 };
 
-void dump_imap(const char *prefix, struct super_block *s)
+void bfs_dump_imap(const char *prefix, struct super_block *s)
 {
 #ifdef DEBUG
 	int i;
@@ -443,7 +441,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
 	}
 	brelse(bh);
 	brelse(sbh);
-	dump_imap("read_super", s);
+	bfs_dump_imap("read_super", s);
 	return 0;
 
 out3:
diff --git a/fs/coda/cache.c b/fs/coda/cache.c
index 1da168c61d35..278f8fdeb9ef 100644
--- a/fs/coda/cache.c
+++ b/fs/coda/cache.c
@@ -13,7 +13,7 @@
 #include <linux/fs.h>
 #include <linux/stat.h>
 #include <linux/errno.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <linux/string.h>
 #include <linux/list.h>
 #include <linux/sched.h>
diff --git a/fs/coda/coda_linux.c b/fs/coda/coda_linux.c
index 2849f41e72a2..1326d38960db 100644
--- a/fs/coda/coda_linux.c
+++ b/fs/coda/coda_linux.c
@@ -13,7 +13,7 @@
 #include <linux/fs.h>
 #include <linux/stat.h>
 #include <linux/errno.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <linux/string.h>
 
 #include <linux/coda.h>
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index cd8a63238b11..9c3dedc000d1 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -19,8 +19,7 @@
 #include <linux/string.h>
 #include <linux/spinlock.h>
 #include <linux/namei.h>
-
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include <linux/coda.h>
 #include <linux/coda_psdev.h>
diff --git a/fs/coda/file.c b/fs/coda/file.c
index 9e83b7790212..d244d743a232 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -18,7 +18,7 @@
 #include <linux/spinlock.h>
 #include <linux/string.h>
 #include <linux/slab.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include <linux/coda.h>
 #include <linux/coda_psdev.h>
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index fe3afb2de880..b945410bfcd5 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -21,9 +21,7 @@
 #include <linux/vfs.h>
 #include <linux/slab.h>
 #include <linux/pid_namespace.h>
-
-#include <asm/uaccess.h>
-
+#include <linux/uaccess.h>
 #include <linux/fs.h>
 #include <linux/vmalloc.h>
 
diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
index 3f5de96bbb58..4326d172fc27 100644
--- a/fs/coda/pioctl.c
+++ b/fs/coda/pioctl.c
@@ -16,7 +16,7 @@
 #include <linux/string.h>
 #include <linux/namei.h>
 #include <linux/module.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include <linux/coda.h>
 #include <linux/coda_psdev.h>
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index 5c1e4242368b..822629126e89 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -40,7 +40,7 @@
 #include <linux/pid_namespace.h>
 #include <asm/io.h>
 #include <asm/poll.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include <linux/coda.h>
 #include <linux/coda_psdev.h>
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index 21fcf8dcb9cd..5bb6e27298a4 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -27,7 +27,7 @@
 #include <linux/string.h>
 #include <linux/slab.h>
 #include <linux/mutex.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <linux/vmalloc.h>
 #include <linux/vfs.h>
 
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index ddcfe590b8a8..355c522f3585 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -11,6 +11,8 @@
  * The actual compression is based on zlib, see the other files.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/pagemap.h>
@@ -21,7 +23,7 @@
 #include <linux/vfs.h>
 #include <linux/mutex.h>
 #include <uapi/linux/cramfs_fs.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include "internal.h"
 
@@ -153,7 +155,7 @@ static struct inode *get_cramfs_inode(struct super_block *sb,
 
 static unsigned char read_buffers[READ_BUFFERS][BUFFER_SIZE];
 static unsigned buffer_blocknr[READ_BUFFERS];
-static struct super_block * buffer_dev[READ_BUFFERS];
+static struct super_block *buffer_dev[READ_BUFFERS];
 static int next_buffer;
 
 /*
@@ -205,6 +207,7 @@ static void *cramfs_read(struct super_block *sb, unsigned int offset, unsigned i
 
 	for (i = 0; i < BLKS_PER_BUF; i++) {
 		struct page *page = pages[i];
+
 		if (page) {
 			wait_on_page_locked(page);
 			if (!PageUptodate(page)) {
@@ -223,6 +226,7 @@ static void *cramfs_read(struct super_block *sb, unsigned int offset, unsigned i
 	data = read_buffers[buffer];
 	for (i = 0; i < BLKS_PER_BUF; i++) {
 		struct page *page = pages[i];
+
 		if (page) {
 			memcpy(data, kmap(page), PAGE_CACHE_SIZE);
 			kunmap(page);
@@ -237,6 +241,7 @@ static void *cramfs_read(struct super_block *sb, unsigned int offset, unsigned i
 static void cramfs_kill_sb(struct super_block *sb)
 {
 	struct cramfs_sb_info *sbi = CRAMFS_SB(sb);
+
 	kill_block_super(sb);
 	kfree(sbi);
 }
@@ -277,7 +282,7 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
 		/* check for wrong endianness */
 		if (super.magic == CRAMFS_MAGIC_WEND) {
 			if (!silent)
-				printk(KERN_ERR "cramfs: wrong endianness\n");
+				pr_err("wrong endianness\n");
 			return -EINVAL;
 		}
 
@@ -287,22 +292,22 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
 		mutex_unlock(&read_mutex);
 		if (super.magic != CRAMFS_MAGIC) {
 			if (super.magic == CRAMFS_MAGIC_WEND && !silent)
-				printk(KERN_ERR "cramfs: wrong endianness\n");
+				pr_err("wrong endianness\n");
 			else if (!silent)
-				printk(KERN_ERR "cramfs: wrong magic\n");
+				pr_err("wrong magic\n");
 			return -EINVAL;
 		}
 	}
 
 	/* get feature flags first */
 	if (super.flags & ~CRAMFS_SUPPORTED_FLAGS) {
-		printk(KERN_ERR "cramfs: unsupported filesystem features\n");
+		pr_err("unsupported filesystem features\n");
 		return -EINVAL;
 	}
 
 	/* Check that the root inode is in a sane state */
 	if (!S_ISDIR(super.root.mode)) {
-		printk(KERN_ERR "cramfs: root is not a directory\n");
+		pr_err("root is not a directory\n");
 		return -EINVAL;
 	}
 	/* correct strange, hard-coded permissions of mkcramfs */
@@ -310,23 +315,23 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent)
 
 	root_offset = super.root.offset << 2;
 	if (super.flags & CRAMFS_FLAG_FSID_VERSION_2) {
-		sbi->size=super.size;
-		sbi->blocks=super.fsid.blocks;
-		sbi->files=super.fsid.files;
+		sbi->size = super.size;
+		sbi->blocks = super.fsid.blocks;
+		sbi->files = super.fsid.files;
 	} else {
-		sbi->size=1<<28;
-		sbi->blocks=0;
-		sbi->files=0;
+		sbi->size = 1<<28;
+		sbi->blocks = 0;
+		sbi->files = 0;
 	}
-	sbi->magic=super.magic;
-	sbi->flags=super.flags;
+	sbi->magic = super.magic;
+	sbi->flags = super.flags;
 	if (root_offset == 0)
-		printk(KERN_INFO "cramfs: empty filesystem");
+		pr_info("empty filesystem");
 	else if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) &&
 		 ((root_offset != sizeof(struct cramfs_super)) &&
 		  (root_offset != 512 + sizeof(struct cramfs_super))))
 	{
-		printk(KERN_ERR "cramfs: bad root offset %lu\n", root_offset);
+		pr_err("bad root offset %lu\n", root_offset);
 		return -EINVAL;
 	}
 
@@ -425,7 +430,7 @@ static int cramfs_readdir(struct file *file, struct dir_context *ctx)
 /*
  * Lookup and fill in the inode data..
  */
-static struct dentry * cramfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+static struct dentry *cramfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
 	unsigned int offset = 0;
 	struct inode *inode = NULL;
@@ -483,7 +488,7 @@ out:
 	return NULL;
 }
 
-static int cramfs_readpage(struct file *file, struct page * page)
+static int cramfs_readpage(struct file *file, struct page *page)
 {
 	struct inode *inode = page->mapping->host;
 	u32 maxblock;
@@ -511,7 +516,7 @@ static int cramfs_readpage(struct file *file, struct page * page)
 		if (compr_len == 0)
 			; /* hole */
 		else if (unlikely(compr_len > (PAGE_CACHE_SIZE << 1))) {
-			pr_err("cramfs: bad compressed blocksize %u\n",
+			pr_err("bad compressed blocksize %u\n",
 				compr_len);
 			goto err;
 		} else {
diff --git a/fs/cramfs/uncompress.c b/fs/cramfs/uncompress.c
index 1760c1b84d97..ec4f1d4fdad0 100644
--- a/fs/cramfs/uncompress.c
+++ b/fs/cramfs/uncompress.c
@@ -15,6 +15,8 @@
  * then is used by multiple filesystems.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/vmalloc.h>
@@ -37,7 +39,7 @@ int cramfs_uncompress_block(void *dst, int dstlen, void *src, int srclen)
 
 	err = zlib_inflateReset(&stream);
 	if (err != Z_OK) {
-		printk("zlib_inflateReset error %d\n", err);
+		pr_err("zlib_inflateReset error %d\n", err);
 		zlib_inflateEnd(&stream);
 		zlib_inflateInit(&stream);
 	}
@@ -48,8 +50,8 @@ int cramfs_uncompress_block(void *dst, int dstlen, void *src, int srclen)
 	return stream.total_out;
 
 err:
-	printk("Error %d while decompressing!\n", err);
-	printk("%p(%d)->%p(%d)\n", src, srclen, dst, dstlen);
+	pr_err("Error %d while decompressing!\n", err);
+	pr_err("%p(%d)->%p(%d)\n", src, srclen, dst, dstlen);
 	return -EIO;
 }
 
@@ -57,7 +59,7 @@ int cramfs_uncompress_init(void)
 {
 	if (!initialized++) {
 		stream.workspace = vmalloc(zlib_inflate_workspacesize());
-		if ( !stream.workspace ) {
+		if (!stream.workspace) {
 			initialized = 0;
 			return -ENOMEM;
 		}
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 8d77ba7b1756..1323c568e362 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -718,16 +718,11 @@ static const struct file_operations waiters_fops = {
 
 void dlm_delete_debug_file(struct dlm_ls *ls)
 {
-	if (ls->ls_debug_rsb_dentry)
-		debugfs_remove(ls->ls_debug_rsb_dentry);
-	if (ls->ls_debug_waiters_dentry)
-		debugfs_remove(ls->ls_debug_waiters_dentry);
-	if (ls->ls_debug_locks_dentry)
-		debugfs_remove(ls->ls_debug_locks_dentry);
-	if (ls->ls_debug_all_dentry)
-		debugfs_remove(ls->ls_debug_all_dentry);
-	if (ls->ls_debug_toss_dentry)
-		debugfs_remove(ls->ls_debug_toss_dentry);
+	debugfs_remove(ls->ls_debug_rsb_dentry);
+	debugfs_remove(ls->ls_debug_waiters_dentry);
+	debugfs_remove(ls->ls_debug_locks_dentry);
+	debugfs_remove(ls->ls_debug_all_dentry);
+	debugfs_remove(ls->ls_debug_toss_dentry);
 }
 
 int dlm_create_debug_file(struct dlm_ls *ls)
diff --git a/fs/efs/namei.c b/fs/efs/namei.c
index 356c044e2cd3..bbee8f063dfa 100644
--- a/fs/efs/namei.c
+++ b/fs/efs/namei.c
@@ -12,7 +12,8 @@
 #include "efs.h"
 
 
-static efs_ino_t efs_find_entry(struct inode *inode, const char *name, int len) {
+static efs_ino_t efs_find_entry(struct inode *inode, const char *name, int len)
+{
 	struct buffer_head *bh;
 
 	int			slot, namelen;
@@ -40,10 +41,10 @@ static efs_ino_t efs_find_entry(struct inode *inode, const char *name, int len)
 		if (be16_to_cpu(dirblock->magic) != EFS_DIRBLK_MAGIC) {
 			pr_err("%s(): invalid directory block\n", __func__);
 			brelse(bh);
-			return(0);
+			return 0;
 		}
 
-		for(slot = 0; slot < dirblock->slots; slot++) {
+		for (slot = 0; slot < dirblock->slots; slot++) {
 			dirslot  = (struct efs_dentry *) (((char *) bh->b_data) + EFS_SLOTAT(dirblock, slot));
 
 			namelen  = dirslot->namelen;
@@ -52,12 +53,12 @@ static efs_ino_t efs_find_entry(struct inode *inode, const char *name, int len)
 			if ((namelen == len) && (!memcmp(name, nameptr, len))) {
 				inodenum = be32_to_cpu(dirslot->inode);
 				brelse(bh);
-				return(inodenum);
+				return inodenum;
 			}
 		}
 		brelse(bh);
 	}
-	return(0);
+	return 0;
 }
 
 struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
diff --git a/fs/exec.c b/fs/exec.c
index ab1f1200ce5d..a2b42a98c743 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -368,10 +368,6 @@ static int bprm_mm_init(struct linux_binprm *bprm)
 	if (!mm)
 		goto err;
 
-	err = init_new_context(current, mm);
-	if (err)
-		goto err;
-
 	err = __bprm_mm_init(bprm);
 	if (err)
 		goto err;
diff --git a/fs/exofs/ore_raid.c b/fs/exofs/ore_raid.c
index 7f20f25c232c..84529b8a331b 100644
--- a/fs/exofs/ore_raid.c
+++ b/fs/exofs/ore_raid.c
@@ -116,7 +116,7 @@ static int _sp2d_alloc(unsigned pages_in_unit, unsigned group_width,
 			num_a1pa = min_t(unsigned, PAGE_SIZE / sizeof__a1pa,
 							pages_in_unit - i);
 
-			__a1pa = kzalloc(num_a1pa * sizeof__a1pa, GFP_KERNEL);
+			__a1pa = kcalloc(num_a1pa, sizeof__a1pa, GFP_KERNEL);
 			if (unlikely(!__a1pa)) {
 				ORE_DBGMSG("!! Failed to _alloc_1p_arrays=%d\n",
 					   num_a1pa);
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 72c82f69b01b..22d1c3df61ac 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -21,6 +21,7 @@
 #include <linux/rcupdate.h>
 #include <linux/pid_namespace.h>
 #include <linux/user_namespace.h>
+#include <linux/shmem_fs.h>
 
 #include <asm/poll.h>
 #include <asm/siginfo.h>
@@ -336,6 +337,10 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
 	case F_GETPIPE_SZ:
 		err = pipe_fcntl(filp, cmd, arg);
 		break;
+	case F_ADD_SEALS:
+	case F_GET_SEALS:
+		err = shmem_fcntl(filp, cmd, arg);
+		break;
 	default:
 		break;
 	}
diff --git a/fs/hpfs/dnode.c b/fs/hpfs/dnode.c
index f36fc010fccb..2923a7bd82ac 100644
--- a/fs/hpfs/dnode.c
+++ b/fs/hpfs/dnode.c
@@ -545,12 +545,13 @@ static void delete_empty_dnode(struct inode *i, dnode_secno dno)
 			struct dnode *d1;
 			struct quad_buffer_head qbh1;
 			if (hpfs_sb(i->i_sb)->sb_chk)
-			    if (up != i->i_ino) {
-				hpfs_error(i->i_sb,
-					"bad pointer to fnode, dnode %08x, pointing to %08x, should be %08lx",
-					dno, up, (unsigned long)i->i_ino);
-				return;
-			    }
+				if (up != i->i_ino) {
+					hpfs_error(i->i_sb,
+						   "bad pointer to fnode, dnode %08x, pointing to %08x, should be %08lx",
+						   dno, up,
+						   (unsigned long)i->i_ino);
+					return;
+				}
 			if ((d1 = hpfs_map_dnode(i->i_sb, down, &qbh1))) {
 				d1->up = cpu_to_le32(up);
 				d1->root_dnode = 1;
@@ -1061,8 +1062,8 @@ struct hpfs_dirent *map_fnode_dirent(struct super_block *s, fnode_secno fno,
 		hpfs_brelse4(qbh);
 		if (hpfs_sb(s)->sb_chk)
 			if (hpfs_stop_cycles(s, dno, &c1, &c2, "map_fnode_dirent #1")) {
-			kfree(name2);
-			return NULL;
+				kfree(name2);
+				return NULL;
 		}
 		goto go_down;
 	}
diff --git a/fs/inode.c b/fs/inode.c
index 5938f3928944..26753ba7b6d6 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -165,6 +165,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
 	mapping->a_ops = &empty_aops;
 	mapping->host = inode;
 	mapping->flags = 0;
+	atomic_set(&mapping->i_mmap_writable, 0);
 	mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE);
 	mapping->private_data = NULL;
 	mapping->backing_dev_info = &default_backing_dev_info;
diff --git a/fs/isofs/compress.c b/fs/isofs/compress.c
index 592e5115a561..f311bf084015 100644
--- a/fs/isofs/compress.c
+++ b/fs/isofs/compress.c
@@ -158,8 +158,8 @@ static loff_t zisofs_uncompress_block(struct inode *inode, loff_t block_start,
 					       "zisofs: zisofs_inflate returned"
 					       " %d, inode = %lu,"
 					       " page idx = %d, bh idx = %d,"
-					       " avail_in = %d,"
-					       " avail_out = %d\n",
+					       " avail_in = %ld,"
+					       " avail_out = %ld\n",
 					       zerr, inode->i_ino, curpage,
 					       curbh, stream.avail_in,
 					       stream.avail_out);
diff --git a/fs/jffs2/compr_zlib.c b/fs/jffs2/compr_zlib.c
index 0b9a1e44e833..5698dae5d92d 100644
--- a/fs/jffs2/compr_zlib.c
+++ b/fs/jffs2/compr_zlib.c
@@ -94,11 +94,12 @@ static int jffs2_zlib_compress(unsigned char *data_in,
 
 	while (def_strm.total_out < *dstlen - STREAM_END_SPACE && def_strm.total_in < *sourcelen) {
 		def_strm.avail_out = *dstlen - (def_strm.total_out + STREAM_END_SPACE);
-		def_strm.avail_in = min((unsigned)(*sourcelen-def_strm.total_in), def_strm.avail_out);
-		jffs2_dbg(1, "calling deflate with avail_in %d, avail_out %d\n",
+		def_strm.avail_in = min_t(unsigned long,
+			(*sourcelen-def_strm.total_in), def_strm.avail_out);
+		jffs2_dbg(1, "calling deflate with avail_in %ld, avail_out %ld\n",
 			  def_strm.avail_in, def_strm.avail_out);
 		ret = zlib_deflate(&def_strm, Z_PARTIAL_FLUSH);
-		jffs2_dbg(1, "deflate returned with avail_in %d, avail_out %d, total_in %ld, total_out %ld\n",
+		jffs2_dbg(1, "deflate returned with avail_in %ld, avail_out %ld, total_in %ld, total_out %ld\n",
 			  def_strm.avail_in, def_strm.avail_out,
 			  def_strm.total_in, def_strm.total_out);
 		if (ret != Z_OK) {
diff --git a/fs/minix/bitmap.c b/fs/minix/bitmap.c
index 4bc50dac8e97..742942a983be 100644
--- a/fs/minix/bitmap.c
+++ b/fs/minix/bitmap.c
@@ -96,7 +96,7 @@ int minix_new_block(struct inode * inode)
 unsigned long minix_count_free_blocks(struct super_block *sb)
 {
 	struct minix_sb_info *sbi = minix_sb(sb);
-	u32 bits = sbi->s_nzones - (sbi->s_firstdatazone + 1);
+	u32 bits = sbi->s_nzones - sbi->s_firstdatazone + 1;
 
 	return (count_free(sbi->s_zmap, sb->s_blocksize, bits)
 		<< sbi->s_log_zone_size);
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index f007a3355570..3f57af196a7d 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -267,12 +267,12 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
 	block = minix_blocks_needed(sbi->s_ninodes, s->s_blocksize);
 	if (sbi->s_imap_blocks < block) {
 		printk("MINIX-fs: file system does not have enough "
-				"imap blocks allocated.  Refusing to mount\n");
+				"imap blocks allocated.  Refusing to mount.\n");
 		goto out_no_bitmap;
 	}
 
 	block = minix_blocks_needed(
-			(sbi->s_nzones - (sbi->s_firstdatazone + 1)),
+			(sbi->s_nzones - sbi->s_firstdatazone + 1),
 			s->s_blocksize);
 	if (sbi->s_zmap_blocks < block) {
 		printk("MINIX-fs: file system does not have enough "
diff --git a/fs/nilfs2/Makefile b/fs/nilfs2/Makefile
index 85c98737a146..fc603e0431bb 100644
--- a/fs/nilfs2/Makefile
+++ b/fs/nilfs2/Makefile
@@ -2,4 +2,4 @@ obj-$(CONFIG_NILFS2_FS) += nilfs2.o
 nilfs2-y := inode.o file.o dir.o super.o namei.o page.o mdt.o \
 	btnode.o bmap.o btree.o direct.o dat.o recovery.o \
 	the_nilfs.o segbuf.o segment.o cpfile.o sufile.o \
-	ifile.o alloc.o gcinode.o ioctl.o
+	ifile.o alloc.o gcinode.o ioctl.o sysfs.o
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index 9bc72dec3fa6..0696161bf59d 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -320,6 +320,14 @@ int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *);
 int nilfs_init_gcinode(struct inode *inode);
 void nilfs_remove_all_gcinodes(struct the_nilfs *nilfs);
 
+/* sysfs.c */
+int __init nilfs_sysfs_init(void);
+void nilfs_sysfs_exit(void);
+int nilfs_sysfs_create_device_group(struct super_block *);
+void nilfs_sysfs_delete_device_group(struct the_nilfs *);
+int nilfs_sysfs_create_snapshot_group(struct nilfs_root *);
+void nilfs_sysfs_delete_snapshot_group(struct nilfs_root *);
+
 /*
  * Inodes and files operations
  */
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 8c532b2ca3ab..c519927b7b5e 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1452,13 +1452,19 @@ static int __init init_nilfs_fs(void)
 	if (err)
 		goto fail;
 
-	err = register_filesystem(&nilfs_fs_type);
+	err = nilfs_sysfs_init();
 	if (err)
 		goto free_cachep;
 
+	err = register_filesystem(&nilfs_fs_type);
+	if (err)
+		goto deinit_sysfs_entry;
+
 	printk(KERN_INFO "NILFS version 2 loaded\n");
 	return 0;
 
+deinit_sysfs_entry:
+	nilfs_sysfs_exit();
 free_cachep:
 	nilfs_destroy_cachep();
 fail:
@@ -1468,6 +1474,7 @@ fail:
 static void __exit exit_nilfs_fs(void)
 {
 	nilfs_destroy_cachep();
+	nilfs_sysfs_exit();
 	unregister_filesystem(&nilfs_fs_type);
 }
 
diff --git a/fs/nilfs2/sysfs.c b/fs/nilfs2/sysfs.c
new file mode 100644
index 000000000000..bbb0dcc35905
--- /dev/null
+++ b/fs/nilfs2/sysfs.c
@@ -0,0 +1,1137 @@
+/*
+ * sysfs.c - sysfs support implementation.
+ *
+ * Copyright (C) 2005-2014 Nippon Telegraph and Telephone Corporation.
+ * Copyright (C) 2014 HGST, Inc., a Western Digital Company.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Written by Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com>
+ */
+
+#include <linux/kobject.h>
+
+#include "nilfs.h"
+#include "mdt.h"
+#include "sufile.h"
+#include "cpfile.h"
+#include "sysfs.h"
+
+/* /sys/fs/<nilfs>/ */
+static struct kset *nilfs_kset;
+
+#define NILFS_SHOW_TIME(time_t_val, buf) ({ \
+		struct tm res; \
+		int count = 0; \
+		time_to_tm(time_t_val, 0, &res); \
+		res.tm_year += 1900; \
+		res.tm_mon += 1; \
+		count = scnprintf(buf, PAGE_SIZE, \
+				    "%ld-%.2d-%.2d %.2d:%.2d:%.2d\n", \
+				    res.tm_year, res.tm_mon, res.tm_mday, \
+				    res.tm_hour, res.tm_min, res.tm_sec);\
+		count; \
+})
+
+#define NILFS_DEV_INT_GROUP_OPS(name, parent_name) \
+static ssize_t nilfs_##name##_attr_show(struct kobject *kobj, \
+					struct attribute *attr, char *buf) \
+{ \
+	struct the_nilfs *nilfs = container_of(kobj->parent, \
+						struct the_nilfs, \
+						ns_##parent_name##_kobj); \
+	struct nilfs_##name##_attr *a = container_of(attr, \
+						struct nilfs_##name##_attr, \
+						attr); \
+	return a->show ? a->show(a, nilfs, buf) : 0; \
+} \
+static ssize_t nilfs_##name##_attr_store(struct kobject *kobj, \
+					 struct attribute *attr, \
+					 const char *buf, size_t len) \
+{ \
+	struct the_nilfs *nilfs = container_of(kobj->parent, \
+						struct the_nilfs, \
+						ns_##parent_name##_kobj); \
+	struct nilfs_##name##_attr *a = container_of(attr, \
+						struct nilfs_##name##_attr, \
+						attr); \
+	return a->store ? a->store(a, nilfs, buf, len) : 0; \
+} \
+static const struct sysfs_ops nilfs_##name##_attr_ops = { \
+	.show	= nilfs_##name##_attr_show, \
+	.store	= nilfs_##name##_attr_store, \
+};
+
+#define NILFS_DEV_INT_GROUP_TYPE(name, parent_name) \
+static void nilfs_##name##_attr_release(struct kobject *kobj) \
+{ \
+	struct nilfs_sysfs_##parent_name##_subgroups *subgroups; \
+	struct the_nilfs *nilfs = container_of(kobj->parent, \
+						struct the_nilfs, \
+						ns_##parent_name##_kobj); \
+	subgroups = nilfs->ns_##parent_name##_subgroups; \
+	complete(&subgroups->sg_##name##_kobj_unregister); \
+} \
+static struct kobj_type nilfs_##name##_ktype = { \
+	.default_attrs	= nilfs_##name##_attrs, \
+	.sysfs_ops	= &nilfs_##name##_attr_ops, \
+	.release	= nilfs_##name##_attr_release, \
+};
+
+#define NILFS_DEV_INT_GROUP_FNS(name, parent_name) \
+static int nilfs_sysfs_create_##name##_group(struct the_nilfs *nilfs) \
+{ \
+	struct kobject *parent; \
+	struct kobject *kobj; \
+	struct completion *kobj_unregister; \
+	struct nilfs_sysfs_##parent_name##_subgroups *subgroups; \
+	int err; \
+	subgroups = nilfs->ns_##parent_name##_subgroups; \
+	kobj = &subgroups->sg_##name##_kobj; \
+	kobj_unregister = &subgroups->sg_##name##_kobj_unregister; \
+	parent = &nilfs->ns_##parent_name##_kobj; \
+	kobj->kset = nilfs_kset; \
+	init_completion(kobj_unregister); \
+	err = kobject_init_and_add(kobj, &nilfs_##name##_ktype, parent, \
+				    #name); \
+	if (err) \
+		return err; \
+	return 0; \
+} \
+static void nilfs_sysfs_delete_##name##_group(struct the_nilfs *nilfs) \
+{ \
+	kobject_del(&nilfs->ns_##parent_name##_subgroups->sg_##name##_kobj); \
+}
+
+/************************************************************************
+ *                        NILFS snapshot attrs                          *
+ ************************************************************************/
+
+static ssize_t
+nilfs_snapshot_inodes_count_show(struct nilfs_snapshot_attr *attr,
+				 struct nilfs_root *root, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%llu\n",
+			(unsigned long long)atomic64_read(&root->inodes_count));
+}
+
+static ssize_t
+nilfs_snapshot_blocks_count_show(struct nilfs_snapshot_attr *attr,
+				 struct nilfs_root *root, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%llu\n",
+			(unsigned long long)atomic64_read(&root->blocks_count));
+}
+
+static const char snapshot_readme_str[] =
+	"The group contains details about mounted snapshot.\n\n"
+	"(1) inodes_count\n\tshow number of inodes for snapshot.\n\n"
+	"(2) blocks_count\n\tshow number of blocks for snapshot.\n\n";
+
+static ssize_t
+nilfs_snapshot_README_show(struct nilfs_snapshot_attr *attr,
+			    struct nilfs_root *root, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, snapshot_readme_str);
+}
+
+NILFS_SNAPSHOT_RO_ATTR(inodes_count);
+NILFS_SNAPSHOT_RO_ATTR(blocks_count);
+NILFS_SNAPSHOT_RO_ATTR(README);
+
+static struct attribute *nilfs_snapshot_attrs[] = {
+	NILFS_SNAPSHOT_ATTR_LIST(inodes_count),
+	NILFS_SNAPSHOT_ATTR_LIST(blocks_count),
+	NILFS_SNAPSHOT_ATTR_LIST(README),
+	NULL,
+};
+
+static ssize_t nilfs_snapshot_attr_show(struct kobject *kobj,
+					struct attribute *attr, char *buf)
+{
+	struct nilfs_root *root =
+			container_of(kobj, struct nilfs_root, snapshot_kobj);
+	struct nilfs_snapshot_attr *a =
+			container_of(attr, struct nilfs_snapshot_attr, attr);
+
+	return a->show ? a->show(a, root, buf) : 0;
+}
+
+static ssize_t nilfs_snapshot_attr_store(struct kobject *kobj,
+					 struct attribute *attr,
+					 const char *buf, size_t len)
+{
+	struct nilfs_root *root =
+			container_of(kobj, struct nilfs_root, snapshot_kobj);
+	struct nilfs_snapshot_attr *a =
+			container_of(attr, struct nilfs_snapshot_attr, attr);
+
+	return a->store ? a->store(a, root, buf, len) : 0;
+}
+
+static void nilfs_snapshot_attr_release(struct kobject *kobj)
+{
+	struct nilfs_root *root = container_of(kobj, struct nilfs_root,
+						snapshot_kobj);
+	complete(&root->snapshot_kobj_unregister);
+}
+
+static const struct sysfs_ops nilfs_snapshot_attr_ops = {
+	.show	= nilfs_snapshot_attr_show,
+	.store	= nilfs_snapshot_attr_store,
+};
+
+static struct kobj_type nilfs_snapshot_ktype = {
+	.default_attrs	= nilfs_snapshot_attrs,
+	.sysfs_ops	= &nilfs_snapshot_attr_ops,
+	.release	= nilfs_snapshot_attr_release,
+};
+
+int nilfs_sysfs_create_snapshot_group(struct nilfs_root *root)
+{
+	struct the_nilfs *nilfs;
+	struct kobject *parent;
+	int err;
+
+	nilfs = root->nilfs;
+	parent = &nilfs->ns_dev_subgroups->sg_mounted_snapshots_kobj;
+	root->snapshot_kobj.kset = nilfs_kset;
+	init_completion(&root->snapshot_kobj_unregister);
+
+	if (root->cno == NILFS_CPTREE_CURRENT_CNO) {
+		err = kobject_init_and_add(&root->snapshot_kobj,
+					    &nilfs_snapshot_ktype,
+					    &nilfs->ns_dev_kobj,
+					    "current_checkpoint");
+	} else {
+		err = kobject_init_and_add(&root->snapshot_kobj,
+					    &nilfs_snapshot_ktype,
+					    parent,
+					    "%llu", root->cno);
+	}
+
+	if (err)
+		return err;
+
+	return 0;
+}
+
+void nilfs_sysfs_delete_snapshot_group(struct nilfs_root *root)
+{
+	kobject_del(&root->snapshot_kobj);
+}
+
+/************************************************************************
+ *                    NILFS mounted snapshots attrs                     *
+ ************************************************************************/
+
+static const char mounted_snapshots_readme_str[] =
+	"The mounted_snapshots group contains group for\n"
+	"every mounted snapshot.\n";
+
+static ssize_t
+nilfs_mounted_snapshots_README_show(struct nilfs_mounted_snapshots_attr *attr,
+				    struct the_nilfs *nilfs, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, mounted_snapshots_readme_str);
+}
+
+NILFS_MOUNTED_SNAPSHOTS_RO_ATTR(README);
+
+static struct attribute *nilfs_mounted_snapshots_attrs[] = {
+	NILFS_MOUNTED_SNAPSHOTS_ATTR_LIST(README),
+	NULL,
+};
+
+NILFS_DEV_INT_GROUP_OPS(mounted_snapshots, dev);
+NILFS_DEV_INT_GROUP_TYPE(mounted_snapshots, dev);
+NILFS_DEV_INT_GROUP_FNS(mounted_snapshots, dev);
+
+/************************************************************************
+ *                      NILFS checkpoints attrs                         *
+ ************************************************************************/
+
+static ssize_t
+nilfs_checkpoints_checkpoints_number_show(struct nilfs_checkpoints_attr *attr,
+					    struct the_nilfs *nilfs,
+					    char *buf)
+{
+	__u64 ncheckpoints;
+	struct nilfs_cpstat cpstat;
+	int err;
+
+	down_read(&nilfs->ns_segctor_sem);
+	err = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
+	up_read(&nilfs->ns_segctor_sem);
+	if (err < 0) {
+		printk(KERN_ERR "NILFS: unable to get checkpoint stat: err=%d\n",
+			err);
+		return err;
+	}
+
+	ncheckpoints = cpstat.cs_ncps;
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", ncheckpoints);
+}
+
+static ssize_t
+nilfs_checkpoints_snapshots_number_show(struct nilfs_checkpoints_attr *attr,
+					struct the_nilfs *nilfs,
+					char *buf)
+{
+	__u64 nsnapshots;
+	struct nilfs_cpstat cpstat;
+	int err;
+
+	down_read(&nilfs->ns_segctor_sem);
+	err = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat);
+	up_read(&nilfs->ns_segctor_sem);
+	if (err < 0) {
+		printk(KERN_ERR "NILFS: unable to get checkpoint stat: err=%d\n",
+			err);
+		return err;
+	}
+
+	nsnapshots = cpstat.cs_nsss;
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", nsnapshots);
+}
+
+static ssize_t
+nilfs_checkpoints_last_seg_checkpoint_show(struct nilfs_checkpoints_attr *attr,
+					    struct the_nilfs *nilfs,
+					    char *buf)
+{
+	__u64 last_cno;
+
+	spin_lock(&nilfs->ns_last_segment_lock);
+	last_cno = nilfs->ns_last_cno;
+	spin_unlock(&nilfs->ns_last_segment_lock);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", last_cno);
+}
+
+static ssize_t
+nilfs_checkpoints_next_checkpoint_show(struct nilfs_checkpoints_attr *attr,
+					struct the_nilfs *nilfs,
+					char *buf)
+{
+	__u64 cno;
+
+	down_read(&nilfs->ns_sem);
+	cno = nilfs->ns_cno;
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", cno);
+}
+
+static const char checkpoints_readme_str[] =
+	"The checkpoints group contains attributes that describe\n"
+	"details about volume's checkpoints.\n\n"
+	"(1) checkpoints_number\n\tshow number of checkpoints on volume.\n\n"
+	"(2) snapshots_number\n\tshow number of snapshots on volume.\n\n"
+	"(3) last_seg_checkpoint\n"
+	"\tshow checkpoint number of the latest segment.\n\n"
+	"(4) next_checkpoint\n\tshow next checkpoint number.\n\n";
+
+static ssize_t
+nilfs_checkpoints_README_show(struct nilfs_checkpoints_attr *attr,
+				struct the_nilfs *nilfs, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, checkpoints_readme_str);
+}
+
+NILFS_CHECKPOINTS_RO_ATTR(checkpoints_number);
+NILFS_CHECKPOINTS_RO_ATTR(snapshots_number);
+NILFS_CHECKPOINTS_RO_ATTR(last_seg_checkpoint);
+NILFS_CHECKPOINTS_RO_ATTR(next_checkpoint);
+NILFS_CHECKPOINTS_RO_ATTR(README);
+
+static struct attribute *nilfs_checkpoints_attrs[] = {
+	NILFS_CHECKPOINTS_ATTR_LIST(checkpoints_number),
+	NILFS_CHECKPOINTS_ATTR_LIST(snapshots_number),
+	NILFS_CHECKPOINTS_ATTR_LIST(last_seg_checkpoint),
+	NILFS_CHECKPOINTS_ATTR_LIST(next_checkpoint),
+	NILFS_CHECKPOINTS_ATTR_LIST(README),
+	NULL,
+};
+
+NILFS_DEV_INT_GROUP_OPS(checkpoints, dev);
+NILFS_DEV_INT_GROUP_TYPE(checkpoints, dev);
+NILFS_DEV_INT_GROUP_FNS(checkpoints, dev);
+
+/************************************************************************
+ *                        NILFS segments attrs                          *
+ ************************************************************************/
+
+static ssize_t
+nilfs_segments_segments_number_show(struct nilfs_segments_attr *attr,
+				     struct the_nilfs *nilfs,
+				     char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%lu\n", nilfs->ns_nsegments);
+}
+
+static ssize_t
+nilfs_segments_blocks_per_segment_show(struct nilfs_segments_attr *attr,
+					struct the_nilfs *nilfs,
+					char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%lu\n", nilfs->ns_blocks_per_segment);
+}
+
+static ssize_t
+nilfs_segments_clean_segments_show(struct nilfs_segments_attr *attr,
+				    struct the_nilfs *nilfs,
+				    char *buf)
+{
+	unsigned long ncleansegs;
+
+	down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
+	ncleansegs = nilfs_sufile_get_ncleansegs(nilfs->ns_sufile);
+	up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%lu\n", ncleansegs);
+}
+
+static ssize_t
+nilfs_segments_dirty_segments_show(struct nilfs_segments_attr *attr,
+				    struct the_nilfs *nilfs,
+				    char *buf)
+{
+	struct nilfs_sustat sustat;
+	int err;
+
+	down_read(&nilfs->ns_segctor_sem);
+	err = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat);
+	up_read(&nilfs->ns_segctor_sem);
+	if (err < 0) {
+		printk(KERN_ERR "NILFS: unable to get segment stat: err=%d\n",
+			err);
+		return err;
+	}
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", sustat.ss_ndirtysegs);
+}
+
+static const char segments_readme_str[] =
+	"The segments group contains attributes that describe\n"
+	"details about volume's segments.\n\n"
+	"(1) segments_number\n\tshow number of segments on volume.\n\n"
+	"(2) blocks_per_segment\n\tshow number of blocks in segment.\n\n"
+	"(3) clean_segments\n\tshow count of clean segments.\n\n"
+	"(4) dirty_segments\n\tshow count of dirty segments.\n\n";
+
+static ssize_t
+nilfs_segments_README_show(struct nilfs_segments_attr *attr,
+			    struct the_nilfs *nilfs,
+			    char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, segments_readme_str);
+}
+
+NILFS_SEGMENTS_RO_ATTR(segments_number);
+NILFS_SEGMENTS_RO_ATTR(blocks_per_segment);
+NILFS_SEGMENTS_RO_ATTR(clean_segments);
+NILFS_SEGMENTS_RO_ATTR(dirty_segments);
+NILFS_SEGMENTS_RO_ATTR(README);
+
+static struct attribute *nilfs_segments_attrs[] = {
+	NILFS_SEGMENTS_ATTR_LIST(segments_number),
+	NILFS_SEGMENTS_ATTR_LIST(blocks_per_segment),
+	NILFS_SEGMENTS_ATTR_LIST(clean_segments),
+	NILFS_SEGMENTS_ATTR_LIST(dirty_segments),
+	NILFS_SEGMENTS_ATTR_LIST(README),
+	NULL,
+};
+
+NILFS_DEV_INT_GROUP_OPS(segments, dev);
+NILFS_DEV_INT_GROUP_TYPE(segments, dev);
+NILFS_DEV_INT_GROUP_FNS(segments, dev);
+
+/************************************************************************
+ *                        NILFS segctor attrs                           *
+ ************************************************************************/
+
+static ssize_t
+nilfs_segctor_last_pseg_block_show(struct nilfs_segctor_attr *attr,
+				    struct the_nilfs *nilfs,
+				    char *buf)
+{
+	sector_t last_pseg;
+
+	spin_lock(&nilfs->ns_last_segment_lock);
+	last_pseg = nilfs->ns_last_pseg;
+	spin_unlock(&nilfs->ns_last_segment_lock);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n",
+			(unsigned long long)last_pseg);
+}
+
+static ssize_t
+nilfs_segctor_last_seg_sequence_show(struct nilfs_segctor_attr *attr,
+					struct the_nilfs *nilfs,
+					char *buf)
+{
+	u64 last_seq;
+
+	spin_lock(&nilfs->ns_last_segment_lock);
+	last_seq = nilfs->ns_last_seq;
+	spin_unlock(&nilfs->ns_last_segment_lock);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", last_seq);
+}
+
+static ssize_t
+nilfs_segctor_last_seg_checkpoint_show(struct nilfs_segctor_attr *attr,
+					struct the_nilfs *nilfs,
+					char *buf)
+{
+	__u64 last_cno;
+
+	spin_lock(&nilfs->ns_last_segment_lock);
+	last_cno = nilfs->ns_last_cno;
+	spin_unlock(&nilfs->ns_last_segment_lock);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", last_cno);
+}
+
+static ssize_t
+nilfs_segctor_current_seg_sequence_show(struct nilfs_segctor_attr *attr,
+					struct the_nilfs *nilfs,
+					char *buf)
+{
+	u64 seg_seq;
+
+	down_read(&nilfs->ns_sem);
+	seg_seq = nilfs->ns_seg_seq;
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", seg_seq);
+}
+
+static ssize_t
+nilfs_segctor_current_last_full_seg_show(struct nilfs_segctor_attr *attr,
+					 struct the_nilfs *nilfs,
+					 char *buf)
+{
+	__u64 segnum;
+
+	down_read(&nilfs->ns_sem);
+	segnum = nilfs->ns_segnum;
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", segnum);
+}
+
+static ssize_t
+nilfs_segctor_next_full_seg_show(struct nilfs_segctor_attr *attr,
+				 struct the_nilfs *nilfs,
+				 char *buf)
+{
+	__u64 nextnum;
+
+	down_read(&nilfs->ns_sem);
+	nextnum = nilfs->ns_nextnum;
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", nextnum);
+}
+
+static ssize_t
+nilfs_segctor_next_pseg_offset_show(struct nilfs_segctor_attr *attr,
+					struct the_nilfs *nilfs,
+					char *buf)
+{
+	unsigned long pseg_offset;
+
+	down_read(&nilfs->ns_sem);
+	pseg_offset = nilfs->ns_pseg_offset;
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%lu\n", pseg_offset);
+}
+
+static ssize_t
+nilfs_segctor_next_checkpoint_show(struct nilfs_segctor_attr *attr,
+					struct the_nilfs *nilfs,
+					char *buf)
+{
+	__u64 cno;
+
+	down_read(&nilfs->ns_sem);
+	cno = nilfs->ns_cno;
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", cno);
+}
+
+static ssize_t
+nilfs_segctor_last_seg_write_time_show(struct nilfs_segctor_attr *attr,
+					struct the_nilfs *nilfs,
+					char *buf)
+{
+	time_t ctime;
+
+	down_read(&nilfs->ns_sem);
+	ctime = nilfs->ns_ctime;
+	up_read(&nilfs->ns_sem);
+
+	return NILFS_SHOW_TIME(ctime, buf);
+}
+
+static ssize_t
+nilfs_segctor_last_seg_write_time_secs_show(struct nilfs_segctor_attr *attr,
+					    struct the_nilfs *nilfs,
+					    char *buf)
+{
+	time_t ctime;
+
+	down_read(&nilfs->ns_sem);
+	ctime = nilfs->ns_ctime;
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", (unsigned long long)ctime);
+}
+
+static ssize_t
+nilfs_segctor_last_nongc_write_time_show(struct nilfs_segctor_attr *attr,
+					 struct the_nilfs *nilfs,
+					 char *buf)
+{
+	time_t nongc_ctime;
+
+	down_read(&nilfs->ns_sem);
+	nongc_ctime = nilfs->ns_nongc_ctime;
+	up_read(&nilfs->ns_sem);
+
+	return NILFS_SHOW_TIME(nongc_ctime, buf);
+}
+
+static ssize_t
+nilfs_segctor_last_nongc_write_time_secs_show(struct nilfs_segctor_attr *attr,
+						struct the_nilfs *nilfs,
+						char *buf)
+{
+	time_t nongc_ctime;
+
+	down_read(&nilfs->ns_sem);
+	nongc_ctime = nilfs->ns_nongc_ctime;
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n",
+			(unsigned long long)nongc_ctime);
+}
+
+static ssize_t
+nilfs_segctor_dirty_data_blocks_count_show(struct nilfs_segctor_attr *attr,
+					    struct the_nilfs *nilfs,
+					    char *buf)
+{
+	u32 ndirtyblks;
+
+	down_read(&nilfs->ns_sem);
+	ndirtyblks = atomic_read(&nilfs->ns_ndirtyblks);
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%u\n", ndirtyblks);
+}
+
+static const char segctor_readme_str[] =
+	"The segctor group contains attributes that describe\n"
+	"segctor thread activity details.\n\n"
+	"(1) last_pseg_block\n"
+	"\tshow start block number of the latest segment.\n\n"
+	"(2) last_seg_sequence\n"
+	"\tshow sequence value of the latest segment.\n\n"
+	"(3) last_seg_checkpoint\n"
+	"\tshow checkpoint number of the latest segment.\n\n"
+	"(4) current_seg_sequence\n\tshow segment sequence counter.\n\n"
+	"(5) current_last_full_seg\n"
+	"\tshow index number of the latest full segment.\n\n"
+	"(6) next_full_seg\n"
+	"\tshow index number of the full segment index to be used next.\n\n"
+	"(7) next_pseg_offset\n"
+	"\tshow offset of next partial segment in the current full segment.\n\n"
+	"(8) next_checkpoint\n\tshow next checkpoint number.\n\n"
+	"(9) last_seg_write_time\n"
+	"\tshow write time of the last segment in human-readable format.\n\n"
+	"(10) last_seg_write_time_secs\n"
+	"\tshow write time of the last segment in seconds.\n\n"
+	"(11) last_nongc_write_time\n"
+	"\tshow write time of the last segment not for cleaner operation "
+	"in human-readable format.\n\n"
+	"(12) last_nongc_write_time_secs\n"
+	"\tshow write time of the last segment not for cleaner operation "
+	"in seconds.\n\n"
+	"(13) dirty_data_blocks_count\n"
+	"\tshow number of dirty data blocks.\n\n";
+
+static ssize_t
+nilfs_segctor_README_show(struct nilfs_segctor_attr *attr,
+			  struct the_nilfs *nilfs, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, segctor_readme_str);
+}
+
+NILFS_SEGCTOR_RO_ATTR(last_pseg_block);
+NILFS_SEGCTOR_RO_ATTR(last_seg_sequence);
+NILFS_SEGCTOR_RO_ATTR(last_seg_checkpoint);
+NILFS_SEGCTOR_RO_ATTR(current_seg_sequence);
+NILFS_SEGCTOR_RO_ATTR(current_last_full_seg);
+NILFS_SEGCTOR_RO_ATTR(next_full_seg);
+NILFS_SEGCTOR_RO_ATTR(next_pseg_offset);
+NILFS_SEGCTOR_RO_ATTR(next_checkpoint);
+NILFS_SEGCTOR_RO_ATTR(last_seg_write_time);
+NILFS_SEGCTOR_RO_ATTR(last_seg_write_time_secs);
+NILFS_SEGCTOR_RO_ATTR(last_nongc_write_time);
+NILFS_SEGCTOR_RO_ATTR(last_nongc_write_time_secs);
+NILFS_SEGCTOR_RO_ATTR(dirty_data_blocks_count);
+NILFS_SEGCTOR_RO_ATTR(README);
+
+static struct attribute *nilfs_segctor_attrs[] = {
+	NILFS_SEGCTOR_ATTR_LIST(last_pseg_block),
+	NILFS_SEGCTOR_ATTR_LIST(last_seg_sequence),
+	NILFS_SEGCTOR_ATTR_LIST(last_seg_checkpoint),
+	NILFS_SEGCTOR_ATTR_LIST(current_seg_sequence),
+	NILFS_SEGCTOR_ATTR_LIST(current_last_full_seg),
+	NILFS_SEGCTOR_ATTR_LIST(next_full_seg),
+	NILFS_SEGCTOR_ATTR_LIST(next_pseg_offset),
+	NILFS_SEGCTOR_ATTR_LIST(next_checkpoint),
+	NILFS_SEGCTOR_ATTR_LIST(last_seg_write_time),
+	NILFS_SEGCTOR_ATTR_LIST(last_seg_write_time_secs),
+	NILFS_SEGCTOR_ATTR_LIST(last_nongc_write_time),
+	NILFS_SEGCTOR_ATTR_LIST(last_nongc_write_time_secs),
+	NILFS_SEGCTOR_ATTR_LIST(dirty_data_blocks_count),
+	NILFS_SEGCTOR_ATTR_LIST(README),
+	NULL,
+};
+
+NILFS_DEV_INT_GROUP_OPS(segctor, dev);
+NILFS_DEV_INT_GROUP_TYPE(segctor, dev);
+NILFS_DEV_INT_GROUP_FNS(segctor, dev);
+
+/************************************************************************
+ *                        NILFS superblock attrs                        *
+ ************************************************************************/
+
+static ssize_t
+nilfs_superblock_sb_write_time_show(struct nilfs_superblock_attr *attr,
+				     struct the_nilfs *nilfs,
+				     char *buf)
+{
+	time_t sbwtime;
+
+	down_read(&nilfs->ns_sem);
+	sbwtime = nilfs->ns_sbwtime;
+	up_read(&nilfs->ns_sem);
+
+	return NILFS_SHOW_TIME(sbwtime, buf);
+}
+
+static ssize_t
+nilfs_superblock_sb_write_time_secs_show(struct nilfs_superblock_attr *attr,
+					 struct the_nilfs *nilfs,
+					 char *buf)
+{
+	time_t sbwtime;
+
+	down_read(&nilfs->ns_sem);
+	sbwtime = nilfs->ns_sbwtime;
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", (unsigned long long)sbwtime);
+}
+
+static ssize_t
+nilfs_superblock_sb_write_count_show(struct nilfs_superblock_attr *attr,
+				      struct the_nilfs *nilfs,
+				      char *buf)
+{
+	unsigned sbwcount;
+
+	down_read(&nilfs->ns_sem);
+	sbwcount = nilfs->ns_sbwcount;
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%u\n", sbwcount);
+}
+
+static ssize_t
+nilfs_superblock_sb_update_frequency_show(struct nilfs_superblock_attr *attr,
+					    struct the_nilfs *nilfs,
+					    char *buf)
+{
+	unsigned sb_update_freq;
+
+	down_read(&nilfs->ns_sem);
+	sb_update_freq = nilfs->ns_sb_update_freq;
+	up_read(&nilfs->ns_sem);
+
+	return snprintf(buf, PAGE_SIZE, "%u\n", sb_update_freq);
+}
+
+static ssize_t
+nilfs_superblock_sb_update_frequency_store(struct nilfs_superblock_attr *attr,
+					    struct the_nilfs *nilfs,
+					    const char *buf, size_t count)
+{
+	unsigned val;
+	int err;
+
+	err = kstrtouint(skip_spaces(buf), 0, &val);
+	if (err) {
+		printk(KERN_ERR "NILFS: unable to convert string: err=%d\n",
+			err);
+		return err;
+	}
+
+	if (val < NILFS_SB_FREQ) {
+		val = NILFS_SB_FREQ;
+		printk(KERN_WARNING "NILFS: superblock update frequency cannot be lesser than 10 seconds\n");
+	}
+
+	down_write(&nilfs->ns_sem);
+	nilfs->ns_sb_update_freq = val;
+	up_write(&nilfs->ns_sem);
+
+	return count;
+}
+
+static const char sb_readme_str[] =
+	"The superblock group contains attributes that describe\n"
+	"superblock's details.\n\n"
+	"(1) sb_write_time\n\tshow previous write time of super block "
+	"in human-readable format.\n\n"
+	"(2) sb_write_time_secs\n\tshow previous write time of super block "
+	"in seconds.\n\n"
+	"(3) sb_write_count\n\tshow write count of super block.\n\n"
+	"(4) sb_update_frequency\n"
+	"\tshow/set interval of periodical update of superblock (in seconds).\n\n"
+	"\tYou can set preferable frequency of superblock update by command:\n\n"
+	"\t'echo <val> > /sys/fs/<nilfs>/<dev>/superblock/sb_update_frequency'\n";
+
+static ssize_t
+nilfs_superblock_README_show(struct nilfs_superblock_attr *attr,
+				struct the_nilfs *nilfs, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, sb_readme_str);
+}
+
+NILFS_SUPERBLOCK_RO_ATTR(sb_write_time);
+NILFS_SUPERBLOCK_RO_ATTR(sb_write_time_secs);
+NILFS_SUPERBLOCK_RO_ATTR(sb_write_count);
+NILFS_SUPERBLOCK_RW_ATTR(sb_update_frequency);
+NILFS_SUPERBLOCK_RO_ATTR(README);
+
+static struct attribute *nilfs_superblock_attrs[] = {
+	NILFS_SUPERBLOCK_ATTR_LIST(sb_write_time),
+	NILFS_SUPERBLOCK_ATTR_LIST(sb_write_time_secs),
+	NILFS_SUPERBLOCK_ATTR_LIST(sb_write_count),
+	NILFS_SUPERBLOCK_ATTR_LIST(sb_update_frequency),
+	NILFS_SUPERBLOCK_ATTR_LIST(README),
+	NULL,
+};
+
+NILFS_DEV_INT_GROUP_OPS(superblock, dev);
+NILFS_DEV_INT_GROUP_TYPE(superblock, dev);
+NILFS_DEV_INT_GROUP_FNS(superblock, dev);
+
+/************************************************************************
+ *                        NILFS device attrs                            *
+ ************************************************************************/
+
+static
+ssize_t nilfs_dev_revision_show(struct nilfs_dev_attr *attr,
+				struct the_nilfs *nilfs,
+				char *buf)
+{
+	struct nilfs_super_block **sbp = nilfs->ns_sbp;
+	u32 major = le32_to_cpu(sbp[0]->s_rev_level);
+	u16 minor = le16_to_cpu(sbp[0]->s_minor_rev_level);
+
+	return snprintf(buf, PAGE_SIZE, "%d.%d\n", major, minor);
+}
+
+static
+ssize_t nilfs_dev_blocksize_show(struct nilfs_dev_attr *attr,
+				 struct the_nilfs *nilfs,
+				 char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%u\n", nilfs->ns_blocksize);
+}
+
+static
+ssize_t nilfs_dev_device_size_show(struct nilfs_dev_attr *attr,
+				    struct the_nilfs *nilfs,
+				    char *buf)
+{
+	struct nilfs_super_block **sbp = nilfs->ns_sbp;
+	u64 dev_size = le64_to_cpu(sbp[0]->s_dev_size);
+
+	return snprintf(buf, PAGE_SIZE, "%llu\n", dev_size);
+}
+
+static
+ssize_t nilfs_dev_free_blocks_show(struct nilfs_dev_attr *attr,
+				   struct the_nilfs *nilfs,
+				   char *buf)
+{
+	sector_t free_blocks = 0;
+
+	nilfs_count_free_blocks(nilfs, &free_blocks);
+	return snprintf(buf, PAGE_SIZE, "%llu\n",
+			(unsigned long long)free_blocks);
+}
+
+static
+ssize_t nilfs_dev_uuid_show(struct nilfs_dev_attr *attr,
+			    struct the_nilfs *nilfs,
+			    char *buf)
+{
+	struct nilfs_super_block **sbp = nilfs->ns_sbp;
+
+	return snprintf(buf, PAGE_SIZE, "%pUb\n", sbp[0]->s_uuid);
+}
+
+static
+ssize_t nilfs_dev_volume_name_show(struct nilfs_dev_attr *attr,
+				    struct the_nilfs *nilfs,
+				    char *buf)
+{
+	struct nilfs_super_block **sbp = nilfs->ns_sbp;
+
+	return scnprintf(buf, sizeof(sbp[0]->s_volume_name), "%s\n",
+			 sbp[0]->s_volume_name);
+}
+
+static const char dev_readme_str[] =
+	"The <device> group contains attributes that describe file system\n"
+	"partition's details.\n\n"
+	"(1) revision\n\tshow NILFS file system revision.\n\n"
+	"(2) blocksize\n\tshow volume block size in bytes.\n\n"
+	"(3) device_size\n\tshow volume size in bytes.\n\n"
+	"(4) free_blocks\n\tshow count of free blocks on volume.\n\n"
+	"(5) uuid\n\tshow volume's UUID.\n\n"
+	"(6) volume_name\n\tshow volume's name.\n\n";
+
+static ssize_t nilfs_dev_README_show(struct nilfs_dev_attr *attr,
+				     struct the_nilfs *nilfs,
+				     char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, dev_readme_str);
+}
+
+NILFS_DEV_RO_ATTR(revision);
+NILFS_DEV_RO_ATTR(blocksize);
+NILFS_DEV_RO_ATTR(device_size);
+NILFS_DEV_RO_ATTR(free_blocks);
+NILFS_DEV_RO_ATTR(uuid);
+NILFS_DEV_RO_ATTR(volume_name);
+NILFS_DEV_RO_ATTR(README);
+
+static struct attribute *nilfs_dev_attrs[] = {
+	NILFS_DEV_ATTR_LIST(revision),
+	NILFS_DEV_ATTR_LIST(blocksize),
+	NILFS_DEV_ATTR_LIST(device_size),
+	NILFS_DEV_ATTR_LIST(free_blocks),
+	NILFS_DEV_ATTR_LIST(uuid),
+	NILFS_DEV_ATTR_LIST(volume_name),
+	NILFS_DEV_ATTR_LIST(README),
+	NULL,
+};
+
+static ssize_t nilfs_dev_attr_show(struct kobject *kobj,
+				    struct attribute *attr, char *buf)
+{
+	struct the_nilfs *nilfs = container_of(kobj, struct the_nilfs,
+						ns_dev_kobj);
+	struct nilfs_dev_attr *a = container_of(attr, struct nilfs_dev_attr,
+						attr);
+
+	return a->show ? a->show(a, nilfs, buf) : 0;
+}
+
+static ssize_t nilfs_dev_attr_store(struct kobject *kobj,
+				    struct attribute *attr,
+				    const char *buf, size_t len)
+{
+	struct the_nilfs *nilfs = container_of(kobj, struct the_nilfs,
+						ns_dev_kobj);
+	struct nilfs_dev_attr *a = container_of(attr, struct nilfs_dev_attr,
+						attr);
+
+	return a->store ? a->store(a, nilfs, buf, len) : 0;
+}
+
+static void nilfs_dev_attr_release(struct kobject *kobj)
+{
+	struct the_nilfs *nilfs = container_of(kobj, struct the_nilfs,
+						ns_dev_kobj);
+	complete(&nilfs->ns_dev_kobj_unregister);
+}
+
+static const struct sysfs_ops nilfs_dev_attr_ops = {
+	.show	= nilfs_dev_attr_show,
+	.store	= nilfs_dev_attr_store,
+};
+
+static struct kobj_type nilfs_dev_ktype = {
+	.default_attrs	= nilfs_dev_attrs,
+	.sysfs_ops	= &nilfs_dev_attr_ops,
+	.release	= nilfs_dev_attr_release,
+};
+
+int nilfs_sysfs_create_device_group(struct super_block *sb)
+{
+	struct the_nilfs *nilfs = sb->s_fs_info;
+	size_t devgrp_size = sizeof(struct nilfs_sysfs_dev_subgroups);
+	int err;
+
+	nilfs->ns_dev_subgroups = kzalloc(devgrp_size, GFP_KERNEL);
+	if (unlikely(!nilfs->ns_dev_subgroups)) {
+		err = -ENOMEM;
+		printk(KERN_ERR "NILFS: unable to allocate memory for device group\n");
+		goto failed_create_device_group;
+	}
+
+	nilfs->ns_dev_kobj.kset = nilfs_kset;
+	init_completion(&nilfs->ns_dev_kobj_unregister);
+	err = kobject_init_and_add(&nilfs->ns_dev_kobj, &nilfs_dev_ktype, NULL,
+				    "%s", sb->s_id);
+	if (err)
+		goto free_dev_subgroups;
+
+	err = nilfs_sysfs_create_mounted_snapshots_group(nilfs);
+	if (err)
+		goto cleanup_dev_kobject;
+
+	err = nilfs_sysfs_create_checkpoints_group(nilfs);
+	if (err)
+		goto delete_mounted_snapshots_group;
+
+	err = nilfs_sysfs_create_segments_group(nilfs);
+	if (err)
+		goto delete_checkpoints_group;
+
+	err = nilfs_sysfs_create_superblock_group(nilfs);
+	if (err)
+		goto delete_segments_group;
+
+	err = nilfs_sysfs_create_segctor_group(nilfs);
+	if (err)
+		goto delete_superblock_group;
+
+	return 0;
+
+delete_superblock_group:
+	nilfs_sysfs_delete_superblock_group(nilfs);
+
+delete_segments_group:
+	nilfs_sysfs_delete_segments_group(nilfs);
+
+delete_checkpoints_group:
+	nilfs_sysfs_delete_checkpoints_group(nilfs);
+
+delete_mounted_snapshots_group:
+	nilfs_sysfs_delete_mounted_snapshots_group(nilfs);
+
+cleanup_dev_kobject:
+	kobject_del(&nilfs->ns_dev_kobj);
+
+free_dev_subgroups:
+	kfree(nilfs->ns_dev_subgroups);
+
+failed_create_device_group:
+	return err;
+}
+
+void nilfs_sysfs_delete_device_group(struct the_nilfs *nilfs)
+{
+	nilfs_sysfs_delete_mounted_snapshots_group(nilfs);
+	nilfs_sysfs_delete_checkpoints_group(nilfs);
+	nilfs_sysfs_delete_segments_group(nilfs);
+	nilfs_sysfs_delete_superblock_group(nilfs);
+	nilfs_sysfs_delete_segctor_group(nilfs);
+	kobject_del(&nilfs->ns_dev_kobj);
+	kfree(nilfs->ns_dev_subgroups);
+}
+
+/************************************************************************
+ *                        NILFS feature attrs                           *
+ ************************************************************************/
+
+static ssize_t nilfs_feature_revision_show(struct kobject *kobj,
+					    struct attribute *attr, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%d.%d\n",
+			NILFS_CURRENT_REV, NILFS_MINOR_REV);
+}
+
+static const char features_readme_str[] =
+	"The features group contains attributes that describe NILFS file\n"
+	"system driver features.\n\n"
+	"(1) revision\n\tshow current revision of NILFS file system driver.\n";
+
+static ssize_t nilfs_feature_README_show(struct kobject *kobj,
+					 struct attribute *attr,
+					 char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, features_readme_str);
+}
+
+NILFS_FEATURE_RO_ATTR(revision);
+NILFS_FEATURE_RO_ATTR(README);
+
+static struct attribute *nilfs_feature_attrs[] = {
+	NILFS_FEATURE_ATTR_LIST(revision),
+	NILFS_FEATURE_ATTR_LIST(README),
+	NULL,
+};
+
+static const struct attribute_group nilfs_feature_attr_group = {
+	.name = "features",
+	.attrs = nilfs_feature_attrs,
+};
+
+int __init nilfs_sysfs_init(void)
+{
+	int err;
+
+	nilfs_kset = kset_create_and_add(NILFS_ROOT_GROUP_NAME, NULL, fs_kobj);
+	if (!nilfs_kset) {
+		err = -ENOMEM;
+		printk(KERN_ERR "NILFS: unable to create sysfs entry: err %d\n",
+			err);
+		goto failed_sysfs_init;
+	}
+
+	err = sysfs_create_group(&nilfs_kset->kobj, &nilfs_feature_attr_group);
+	if (unlikely(err)) {
+		printk(KERN_ERR "NILFS: unable to create feature group: err %d\n",
+			err);
+		goto cleanup_sysfs_init;
+	}
+
+	return 0;
+
+cleanup_sysfs_init:
+	kset_unregister(nilfs_kset);
+
+failed_sysfs_init:
+	return err;
+}
+
+void nilfs_sysfs_exit(void)
+{
+	sysfs_remove_group(&nilfs_kset->kobj, &nilfs_feature_attr_group);
+	kset_unregister(nilfs_kset);
+}
diff --git a/fs/nilfs2/sysfs.h b/fs/nilfs2/sysfs.h
new file mode 100644
index 000000000000..677e3a1a8370
--- /dev/null
+++ b/fs/nilfs2/sysfs.h
@@ -0,0 +1,176 @@
+/*
+ * sysfs.h - sysfs support declarations.
+ *
+ * Copyright (C) 2005-2014 Nippon Telegraph and Telephone Corporation.
+ * Copyright (C) 2014 HGST, Inc., a Western Digital Company.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Written by Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com>
+ */
+
+#ifndef _NILFS_SYSFS_H
+#define _NILFS_SYSFS_H
+
+#include <linux/sysfs.h>
+
+#define NILFS_ROOT_GROUP_NAME	"nilfs2"
+
+/*
+ * struct nilfs_sysfs_dev_subgroups - device subgroup kernel objects
+ * @sg_superblock_kobj: /sys/fs/<nilfs>/<device>/superblock
+ * @sg_superblock_kobj_unregister: completion state
+ * @sg_segctor_kobj: /sys/fs/<nilfs>/<device>/segctor
+ * @sg_segctor_kobj_unregister: completion state
+ * @sg_mounted_snapshots_kobj: /sys/fs/<nilfs>/<device>/mounted_snapshots
+ * @sg_mounted_snapshots_kobj_unregister: completion state
+ * @sg_checkpoints_kobj: /sys/fs/<nilfs>/<device>/checkpoints
+ * @sg_checkpoints_kobj_unregister: completion state
+ * @sg_segments_kobj: /sys/fs/<nilfs>/<device>/segments
+ * @sg_segments_kobj_unregister: completion state
+ */
+struct nilfs_sysfs_dev_subgroups {
+	/* /sys/fs/<nilfs>/<device>/superblock */
+	struct kobject sg_superblock_kobj;
+	struct completion sg_superblock_kobj_unregister;
+
+	/* /sys/fs/<nilfs>/<device>/segctor */
+	struct kobject sg_segctor_kobj;
+	struct completion sg_segctor_kobj_unregister;
+
+	/* /sys/fs/<nilfs>/<device>/mounted_snapshots */
+	struct kobject sg_mounted_snapshots_kobj;
+	struct completion sg_mounted_snapshots_kobj_unregister;
+
+	/* /sys/fs/<nilfs>/<device>/checkpoints */
+	struct kobject sg_checkpoints_kobj;
+	struct completion sg_checkpoints_kobj_unregister;
+
+	/* /sys/fs/<nilfs>/<device>/segments */
+	struct kobject sg_segments_kobj;
+	struct completion sg_segments_kobj_unregister;
+};
+
+#define NILFS_COMMON_ATTR_STRUCT(name) \
+struct nilfs_##name##_attr { \
+	struct attribute attr; \
+	ssize_t (*show)(struct kobject *, struct attribute *, \
+			char *); \
+	ssize_t (*store)(struct kobject *, struct attribute *, \
+			 const char *, size_t); \
+};
+
+NILFS_COMMON_ATTR_STRUCT(feature);
+
+#define NILFS_DEV_ATTR_STRUCT(name) \
+struct nilfs_##name##_attr { \
+	struct attribute attr; \
+	ssize_t (*show)(struct nilfs_##name##_attr *, struct the_nilfs *, \
+			char *); \
+	ssize_t (*store)(struct nilfs_##name##_attr *, struct the_nilfs *, \
+			 const char *, size_t); \
+};
+
+NILFS_DEV_ATTR_STRUCT(dev);
+NILFS_DEV_ATTR_STRUCT(segments);
+NILFS_DEV_ATTR_STRUCT(mounted_snapshots);
+NILFS_DEV_ATTR_STRUCT(checkpoints);
+NILFS_DEV_ATTR_STRUCT(superblock);
+NILFS_DEV_ATTR_STRUCT(segctor);
+
+#define NILFS_CP_ATTR_STRUCT(name) \
+struct nilfs_##name##_attr { \
+	struct attribute attr; \
+	ssize_t (*show)(struct nilfs_##name##_attr *, struct nilfs_root *, \
+			char *); \
+	ssize_t (*store)(struct nilfs_##name##_attr *, struct nilfs_root *, \
+			 const char *, size_t); \
+};
+
+NILFS_CP_ATTR_STRUCT(snapshot);
+
+#define NILFS_ATTR(type, name, mode, show, store) \
+	static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \
+		__ATTR(name, mode, show, store)
+
+#define NILFS_INFO_ATTR(type, name) \
+	NILFS_ATTR(type, name, 0444, NULL, NULL)
+#define NILFS_RO_ATTR(type, name) \
+	NILFS_ATTR(type, name, 0444, nilfs_##type##_##name##_show, NULL)
+#define NILFS_RW_ATTR(type, name) \
+	NILFS_ATTR(type, name, 0644, \
+		    nilfs_##type##_##name##_show, \
+		    nilfs_##type##_##name##_store)
+
+#define NILFS_FEATURE_INFO_ATTR(name) \
+	NILFS_INFO_ATTR(feature, name)
+#define NILFS_FEATURE_RO_ATTR(name) \
+	NILFS_RO_ATTR(feature, name)
+#define NILFS_FEATURE_RW_ATTR(name) \
+	NILFS_RW_ATTR(feature, name)
+
+#define NILFS_DEV_INFO_ATTR(name) \
+	NILFS_INFO_ATTR(dev, name)
+#define NILFS_DEV_RO_ATTR(name) \
+	NILFS_RO_ATTR(dev, name)
+#define NILFS_DEV_RW_ATTR(name) \
+	NILFS_RW_ATTR(dev, name)
+
+#define NILFS_SEGMENTS_RO_ATTR(name) \
+	NILFS_RO_ATTR(segments, name)
+#define NILFS_SEGMENTS_RW_ATTR(name) \
+	NILFS_RW_ATTR(segs_info, name)
+
+#define NILFS_MOUNTED_SNAPSHOTS_RO_ATTR(name) \
+	NILFS_RO_ATTR(mounted_snapshots, name)
+
+#define NILFS_CHECKPOINTS_RO_ATTR(name) \
+	NILFS_RO_ATTR(checkpoints, name)
+#define NILFS_CHECKPOINTS_RW_ATTR(name) \
+	NILFS_RW_ATTR(checkpoints, name)
+
+#define NILFS_SNAPSHOT_INFO_ATTR(name) \
+	NILFS_INFO_ATTR(snapshot, name)
+#define NILFS_SNAPSHOT_RO_ATTR(name) \
+	NILFS_RO_ATTR(snapshot, name)
+#define NILFS_SNAPSHOT_RW_ATTR(name) \
+	NILFS_RW_ATTR(snapshot, name)
+
+#define NILFS_SUPERBLOCK_RO_ATTR(name) \
+	NILFS_RO_ATTR(superblock, name)
+#define NILFS_SUPERBLOCK_RW_ATTR(name) \
+	NILFS_RW_ATTR(superblock, name)
+
+#define NILFS_SEGCTOR_INFO_ATTR(name) \
+	NILFS_INFO_ATTR(segctor, name)
+#define NILFS_SEGCTOR_RO_ATTR(name) \
+	NILFS_RO_ATTR(segctor, name)
+#define NILFS_SEGCTOR_RW_ATTR(name) \
+	NILFS_RW_ATTR(segctor, name)
+
+#define NILFS_FEATURE_ATTR_LIST(name) \
+	(&nilfs_feature_attr_##name.attr)
+#define NILFS_DEV_ATTR_LIST(name) \
+	(&nilfs_dev_attr_##name.attr)
+#define NILFS_SEGMENTS_ATTR_LIST(name) \
+	(&nilfs_segments_attr_##name.attr)
+#define NILFS_MOUNTED_SNAPSHOTS_ATTR_LIST(name) \
+	(&nilfs_mounted_snapshots_attr_##name.attr)
+#define NILFS_CHECKPOINTS_ATTR_LIST(name) \
+	(&nilfs_checkpoints_attr_##name.attr)
+#define NILFS_SNAPSHOT_ATTR_LIST(name) \
+	(&nilfs_snapshot_attr_##name.attr)
+#define NILFS_SUPERBLOCK_ATTR_LIST(name) \
+	(&nilfs_superblock_attr_##name.attr)
+#define NILFS_SEGCTOR_ATTR_LIST(name) \
+	(&nilfs_segctor_attr_##name.attr)
+
+#endif /* _NILFS_SYSFS_H */
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 8ba8229ba076..9da25fe9ea61 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -85,6 +85,7 @@ struct the_nilfs *alloc_nilfs(struct block_device *bdev)
 	nilfs->ns_cptree = RB_ROOT;
 	spin_lock_init(&nilfs->ns_cptree_lock);
 	init_rwsem(&nilfs->ns_segctor_sem);
+	nilfs->ns_sb_update_freq = NILFS_SB_FREQ;
 
 	return nilfs;
 }
@@ -97,6 +98,7 @@ void destroy_nilfs(struct the_nilfs *nilfs)
 {
 	might_sleep();
 	if (nilfs_init(nilfs)) {
+		nilfs_sysfs_delete_device_group(nilfs);
 		brelse(nilfs->ns_sbh[0]);
 		brelse(nilfs->ns_sbh[1]);
 	}
@@ -640,6 +642,10 @@ int init_nilfs(struct the_nilfs *nilfs, struct super_block *sb, char *data)
 	if (err)
 		goto failed_sbh;
 
+	err = nilfs_sysfs_create_device_group(sb);
+	if (err)
+		goto failed_sbh;
+
 	set_nilfs_init(nilfs);
 	err = 0;
  out:
@@ -740,12 +746,13 @@ nilfs_find_or_create_root(struct the_nilfs *nilfs, __u64 cno)
 {
 	struct rb_node **p, *parent;
 	struct nilfs_root *root, *new;
+	int err;
 
 	root = nilfs_lookup_root(nilfs, cno);
 	if (root)
 		return root;
 
-	new = kmalloc(sizeof(*root), GFP_KERNEL);
+	new = kzalloc(sizeof(*root), GFP_KERNEL);
 	if (!new)
 		return NULL;
 
@@ -782,6 +789,12 @@ nilfs_find_or_create_root(struct the_nilfs *nilfs, __u64 cno)
 
 	spin_unlock(&nilfs->ns_cptree_lock);
 
+	err = nilfs_sysfs_create_snapshot_group(new);
+	if (err) {
+		kfree(new);
+		new = NULL;
+	}
+
 	return new;
 }
 
@@ -790,6 +803,8 @@ void nilfs_put_root(struct nilfs_root *root)
 	if (atomic_dec_and_test(&root->count)) {
 		struct the_nilfs *nilfs = root->nilfs;
 
+		nilfs_sysfs_delete_snapshot_group(root);
+
 		spin_lock(&nilfs->ns_cptree_lock);
 		rb_erase(&root->rb_node, &nilfs->ns_cptree);
 		spin_unlock(&nilfs->ns_cptree_lock);
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index de8cc53b4a5c..d01ead1bea9a 100644
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -33,6 +33,7 @@
 #include <linux/slab.h>
 
 struct nilfs_sc_info;
+struct nilfs_sysfs_dev_subgroups;
 
 /* the_nilfs struct */
 enum {
@@ -54,6 +55,7 @@ enum {
  * @ns_sbwcount: write count of super block
  * @ns_sbsize: size of valid data in super block
  * @ns_mount_state: file system state
+ * @ns_sb_update_freq: interval of periodical update of superblocks (in seconds)
  * @ns_seg_seq: segment sequence counter
  * @ns_segnum: index number of the latest full segment.
  * @ns_nextnum: index number of the full segment index to be used next
@@ -95,6 +97,9 @@ enum {
  * @ns_inode_size: size of on-disk inode
  * @ns_first_ino: first not-special inode number
  * @ns_crc_seed: seed value of CRC32 calculation
+ * @ns_dev_kobj: /sys/fs/<nilfs>/<device>
+ * @ns_dev_kobj_unregister: completion state
+ * @ns_dev_subgroups: <device> subgroups pointer
  */
 struct the_nilfs {
 	unsigned long		ns_flags;
@@ -114,6 +119,7 @@ struct the_nilfs {
 	unsigned		ns_sbwcount;
 	unsigned		ns_sbsize;
 	unsigned		ns_mount_state;
+	unsigned		ns_sb_update_freq;
 
 	/*
 	 * Following fields are dedicated to a writable FS-instance.
@@ -188,6 +194,11 @@ struct the_nilfs {
 	int			ns_inode_size;
 	int			ns_first_ino;
 	u32			ns_crc_seed;
+
+	/* /sys/fs/<nilfs>/<device> */
+	struct kobject ns_dev_kobj;
+	struct completion ns_dev_kobj_unregister;
+	struct nilfs_sysfs_dev_subgroups *ns_dev_subgroups;
 };
 
 #define THE_NILFS_FNS(bit, name)					\
@@ -232,6 +243,8 @@ THE_NILFS_FNS(SB_DIRTY, sb_dirty)
  * @ifile: inode file
  * @inodes_count: number of inodes
  * @blocks_count: number of blocks
+ * @snapshot_kobj: /sys/fs/<nilfs>/<device>/mounted_snapshots/<snapshot>
+ * @snapshot_kobj_unregister: completion state for kernel object
  */
 struct nilfs_root {
 	__u64 cno;
@@ -243,6 +256,10 @@ struct nilfs_root {
 
 	atomic64_t inodes_count;
 	atomic64_t blocks_count;
+
+	/* /sys/fs/<nilfs>/<device>/mounted_snapshots/<snapshot> */
+	struct kobject snapshot_kobj;
+	struct completion snapshot_kobj_unregister;
 };
 
 /* Special checkpoint number */
@@ -254,7 +271,8 @@ struct nilfs_root {
 static inline int nilfs_sb_need_update(struct the_nilfs *nilfs)
 {
 	u64 t = get_seconds();
-	return t < nilfs->ns_sbwtime || t > nilfs->ns_sbwtime + NILFS_SB_FREQ;
+	return t < nilfs->ns_sbwtime ||
+		t > nilfs->ns_sbwtime + nilfs->ns_sb_update_freq;
 }
 
 static inline int nilfs_sb_will_flip(struct the_nilfs *nilfs)
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index ec58c7659183..ba8819702c56 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -321,7 +321,7 @@ static int omfs_get_imap(struct super_block *sb)
 		goto out;
 
 	sbi->s_imap_size = array_size;
-	sbi->s_imap = kzalloc(array_size * sizeof(unsigned long *), GFP_KERNEL);
+	sbi->s_imap = kcalloc(array_size, sizeof(unsigned long *), GFP_KERNEL);
 	if (!sbi->s_imap)
 		goto nomem;
 
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 2d696b0c93bf..043c83cb51f9 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -105,7 +105,7 @@
  */
 
 struct pid_entry {
-	char *name;
+	const char *name;
 	int len;
 	umode_t mode;
 	const struct inode_operations *iop;
@@ -130,10 +130,6 @@ struct pid_entry {
 		{ .proc_get_link = get_link } )
 #define REG(NAME, MODE, fops)				\
 	NOD(NAME, (S_IFREG|(MODE)), NULL, &fops, {})
-#define INF(NAME, MODE, read)				\
-	NOD(NAME, (S_IFREG|(MODE)), 			\
-		NULL, &proc_info_file_operations,	\
-		{ .proc_read = read } )
 #define ONE(NAME, MODE, show)				\
 	NOD(NAME, (S_IFREG|(MODE)), 			\
 		NULL, &proc_single_file_operations,	\
@@ -200,27 +196,32 @@ static int proc_root_link(struct dentry *dentry, struct path *path)
 	return result;
 }
 
-static int proc_pid_cmdline(struct task_struct *task, char *buffer)
+static int proc_pid_cmdline(struct seq_file *m, struct pid_namespace *ns,
+			    struct pid *pid, struct task_struct *task)
 {
-	return get_cmdline(task, buffer, PAGE_SIZE);
+	/*
+	 * Rely on struct seq_operations::show() being called once
+	 * per internal buffer allocation. See single_open(), traverse().
+	 */
+	BUG_ON(m->size < PAGE_SIZE);
+	m->count += get_cmdline(task, m->buf, PAGE_SIZE);
+	return 0;
 }
 
-static int proc_pid_auxv(struct task_struct *task, char *buffer)
+static int proc_pid_auxv(struct seq_file *m, struct pid_namespace *ns,
+			 struct pid *pid, struct task_struct *task)
 {
 	struct mm_struct *mm = mm_access(task, PTRACE_MODE_READ);
-	int res = PTR_ERR(mm);
 	if (mm && !IS_ERR(mm)) {
 		unsigned int nwords = 0;
 		do {
 			nwords += 2;
 		} while (mm->saved_auxv[nwords - 2] != 0); /* AT_NULL */
-		res = nwords * sizeof(mm->saved_auxv[0]);
-		if (res > PAGE_SIZE)
-			res = PAGE_SIZE;
-		memcpy(buffer, mm->saved_auxv, res);
+		seq_write(m, mm->saved_auxv, nwords * sizeof(mm->saved_auxv[0]));
 		mmput(mm);
-	}
-	return res;
+		return 0;
+	} else
+		return PTR_ERR(mm);
 }
 
 
@@ -229,7 +230,8 @@ static int proc_pid_auxv(struct task_struct *task, char *buffer)
  * Provides a wchan file via kallsyms in a proper one-value-per-file format.
  * Returns the resolved symbol.  If that fails, simply return the address.
  */
-static int proc_pid_wchan(struct task_struct *task, char *buffer)
+static int proc_pid_wchan(struct seq_file *m, struct pid_namespace *ns,
+			  struct pid *pid, struct task_struct *task)
 {
 	unsigned long wchan;
 	char symname[KSYM_NAME_LEN];
@@ -240,9 +242,9 @@ static int proc_pid_wchan(struct task_struct *task, char *buffer)
 		if (!ptrace_may_access(task, PTRACE_MODE_READ))
 			return 0;
 		else
-			return sprintf(buffer, "%lu", wchan);
+			return seq_printf(m, "%lu", wchan);
 	else
-		return sprintf(buffer, "%s", symname);
+		return seq_printf(m, "%s", symname);
 }
 #endif /* CONFIG_KALLSYMS */
 
@@ -304,9 +306,10 @@ static int proc_pid_stack(struct seq_file *m, struct pid_namespace *ns,
 /*
  * Provides /proc/PID/schedstat
  */
-static int proc_pid_schedstat(struct task_struct *task, char *buffer)
+static int proc_pid_schedstat(struct seq_file *m, struct pid_namespace *ns,
+			      struct pid *pid, struct task_struct *task)
 {
-	return sprintf(buffer, "%llu %llu %lu\n",
+	return seq_printf(m, "%llu %llu %lu\n",
 			(unsigned long long)task->se.sum_exec_runtime,
 			(unsigned long long)task->sched_info.run_delay,
 			task->sched_info.pcount);
@@ -404,7 +407,8 @@ static const struct file_operations proc_cpuset_operations = {
 };
 #endif
 
-static int proc_oom_score(struct task_struct *task, char *buffer)
+static int proc_oom_score(struct seq_file *m, struct pid_namespace *ns,
+			  struct pid *pid, struct task_struct *task)
 {
 	unsigned long totalpages = totalram_pages + total_swap_pages;
 	unsigned long points = 0;
@@ -414,12 +418,12 @@ static int proc_oom_score(struct task_struct *task, char *buffer)
 		points = oom_badness(task, NULL, NULL, totalpages) *
 						1000 / totalpages;
 	read_unlock(&tasklist_lock);
-	return sprintf(buffer, "%lu\n", points);
+	return seq_printf(m, "%lu\n", points);
 }
 
 struct limit_names {
-	char *name;
-	char *unit;
+	const char *name;
+	const char *unit;
 };
 
 static const struct limit_names lnames[RLIM_NLIMITS] = {
@@ -442,12 +446,11 @@ static const struct limit_names lnames[RLIM_NLIMITS] = {
 };
 
 /* Display limits for a process */
-static int proc_pid_limits(struct task_struct *task, char *buffer)
+static int proc_pid_limits(struct seq_file *m, struct pid_namespace *ns,
+			   struct pid *pid, struct task_struct *task)
 {
 	unsigned int i;
-	int count = 0;
 	unsigned long flags;
-	char *bufptr = buffer;
 
 	struct rlimit rlim[RLIM_NLIMITS];
 
@@ -459,35 +462,34 @@ static int proc_pid_limits(struct task_struct *task, char *buffer)
 	/*
 	 * print the file header
 	 */
-	count += sprintf(&bufptr[count], "%-25s %-20s %-20s %-10s\n",
+       seq_printf(m, "%-25s %-20s %-20s %-10s\n",
 			"Limit", "Soft Limit", "Hard Limit", "Units");
 
 	for (i = 0; i < RLIM_NLIMITS; i++) {
 		if (rlim[i].rlim_cur == RLIM_INFINITY)
-			count += sprintf(&bufptr[count], "%-25s %-20s ",
+			seq_printf(m, "%-25s %-20s ",
 					 lnames[i].name, "unlimited");
 		else
-			count += sprintf(&bufptr[count], "%-25s %-20lu ",
+			seq_printf(m, "%-25s %-20lu ",
 					 lnames[i].name, rlim[i].rlim_cur);
 
 		if (rlim[i].rlim_max == RLIM_INFINITY)
-			count += sprintf(&bufptr[count], "%-20s ", "unlimited");
+			seq_printf(m, "%-20s ", "unlimited");
 		else
-			count += sprintf(&bufptr[count], "%-20lu ",
-					 rlim[i].rlim_max);
+			seq_printf(m, "%-20lu ", rlim[i].rlim_max);
 
 		if (lnames[i].unit)
-			count += sprintf(&bufptr[count], "%-10s\n",
-					 lnames[i].unit);
+			seq_printf(m, "%-10s\n", lnames[i].unit);
 		else
-			count += sprintf(&bufptr[count], "\n");
+			seq_putc(m, '\n');
 	}
 
-	return count;
+	return 0;
 }
 
 #ifdef CONFIG_HAVE_ARCH_TRACEHOOK
-static int proc_pid_syscall(struct task_struct *task, char *buffer)
+static int proc_pid_syscall(struct seq_file *m, struct pid_namespace *ns,
+			    struct pid *pid, struct task_struct *task)
 {
 	long nr;
 	unsigned long args[6], sp, pc;
@@ -496,11 +498,11 @@ static int proc_pid_syscall(struct task_struct *task, char *buffer)
 		return res;
 
 	if (task_current_syscall(task, &nr, args, 6, &sp, &pc))
-		res = sprintf(buffer, "running\n");
+		seq_puts(m, "running\n");
 	else if (nr < 0)
-		res = sprintf(buffer, "%ld 0x%lx 0x%lx\n", nr, sp, pc);
+		seq_printf(m, "%ld 0x%lx 0x%lx\n", nr, sp, pc);
 	else
-		res = sprintf(buffer,
+		seq_printf(m,
 		       "%ld 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n",
 		       nr,
 		       args[0], args[1], args[2], args[3], args[4], args[5],
@@ -598,43 +600,6 @@ static const struct inode_operations proc_def_inode_operations = {
 	.setattr	= proc_setattr,
 };
 
-#define PROC_BLOCK_SIZE	(3*1024)		/* 4K page size but our output routines use some slack for overruns */
-
-static ssize_t proc_info_read(struct file * file, char __user * buf,
-			  size_t count, loff_t *ppos)
-{
-	struct inode * inode = file_inode(file);
-	unsigned long page;
-	ssize_t length;
-	struct task_struct *task = get_proc_task(inode);
-
-	length = -ESRCH;
-	if (!task)
-		goto out_no_task;
-
-	if (count > PROC_BLOCK_SIZE)
-		count = PROC_BLOCK_SIZE;
-
-	length = -ENOMEM;
-	if (!(page = __get_free_page(GFP_TEMPORARY)))
-		goto out;
-
-	length = PROC_I(inode)->op.proc_read(task, (char*)page);
-
-	if (length >= 0)
-		length = simple_read_from_buffer(buf, count, ppos, (char *)page, length);
-	free_page(page);
-out:
-	put_task_struct(task);
-out_no_task:
-	return length;
-}
-
-static const struct file_operations proc_info_file_operations = {
-	.read		= proc_info_read,
-	.llseek		= generic_file_llseek,
-};
-
 static int proc_single_show(struct seq_file *m, void *v)
 {
 	struct inode *inode = m->private;
@@ -2056,7 +2021,7 @@ static int show_timer(struct seq_file *m, void *v)
 	struct k_itimer *timer;
 	struct timers_private *tp = m->private;
 	int notify;
-	static char *nstr[] = {
+	static const char * const nstr[] = {
 		[SIGEV_SIGNAL] = "signal",
 		[SIGEV_NONE] = "none",
 		[SIGEV_THREAD] = "thread",
@@ -2392,7 +2357,7 @@ static const struct file_operations proc_coredump_filter_operations = {
 #endif
 
 #ifdef CONFIG_TASK_IO_ACCOUNTING
-static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
+static int do_io_accounting(struct task_struct *task, struct seq_file *m, int whole)
 {
 	struct task_io_accounting acct = task->ioac;
 	unsigned long flags;
@@ -2416,7 +2381,7 @@ static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
 
 		unlock_task_sighand(task, &flags);
 	}
-	result = sprintf(buffer,
+	result = seq_printf(m,
 			"rchar: %llu\n"
 			"wchar: %llu\n"
 			"syscr: %llu\n"
@@ -2436,20 +2401,22 @@ out_unlock:
 	return result;
 }
 
-static int proc_tid_io_accounting(struct task_struct *task, char *buffer)
+static int proc_tid_io_accounting(struct seq_file *m, struct pid_namespace *ns,
+				  struct pid *pid, struct task_struct *task)
 {
-	return do_io_accounting(task, buffer, 0);
+	return do_io_accounting(task, m, 0);
 }
 
-static int proc_tgid_io_accounting(struct task_struct *task, char *buffer)
+static int proc_tgid_io_accounting(struct seq_file *m, struct pid_namespace *ns,
+				   struct pid *pid, struct task_struct *task)
 {
-	return do_io_accounting(task, buffer, 1);
+	return do_io_accounting(task, m, 1);
 }
 #endif /* CONFIG_TASK_IO_ACCOUNTING */
 
 #ifdef CONFIG_USER_NS
 static int proc_id_map_open(struct inode *inode, struct file *file,
-	struct seq_operations *seq_ops)
+	const struct seq_operations *seq_ops)
 {
 	struct user_namespace *ns = NULL;
 	struct task_struct *task;
@@ -2557,10 +2524,10 @@ static const struct pid_entry tgid_base_stuff[] = {
 	DIR("net",        S_IRUGO|S_IXUGO, proc_net_inode_operations, proc_net_operations),
 #endif
 	REG("environ",    S_IRUSR, proc_environ_operations),
-	INF("auxv",       S_IRUSR, proc_pid_auxv),
+	ONE("auxv",       S_IRUSR, proc_pid_auxv),
 	ONE("status",     S_IRUGO, proc_pid_status),
 	ONE("personality", S_IRUSR, proc_pid_personality),
-	INF("limits",	  S_IRUGO, proc_pid_limits),
+	ONE("limits",	  S_IRUGO, proc_pid_limits),
 #ifdef CONFIG_SCHED_DEBUG
 	REG("sched",      S_IRUGO|S_IWUSR, proc_pid_sched_operations),
 #endif
@@ -2569,9 +2536,9 @@ static const struct pid_entry tgid_base_stuff[] = {
 #endif
 	REG("comm",      S_IRUGO|S_IWUSR, proc_pid_set_comm_operations),
 #ifdef CONFIG_HAVE_ARCH_TRACEHOOK
-	INF("syscall",    S_IRUSR, proc_pid_syscall),
+	ONE("syscall",    S_IRUSR, proc_pid_syscall),
 #endif
-	INF("cmdline",    S_IRUGO, proc_pid_cmdline),
+	ONE("cmdline",    S_IRUGO, proc_pid_cmdline),
 	ONE("stat",       S_IRUGO, proc_tgid_stat),
 	ONE("statm",      S_IRUGO, proc_pid_statm),
 	REG("maps",       S_IRUGO, proc_pid_maps_operations),
@@ -2594,13 +2561,13 @@ static const struct pid_entry tgid_base_stuff[] = {
 	DIR("attr",       S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
 #endif
 #ifdef CONFIG_KALLSYMS
-	INF("wchan",      S_IRUGO, proc_pid_wchan),
+	ONE("wchan",      S_IRUGO, proc_pid_wchan),
 #endif
 #ifdef CONFIG_STACKTRACE
 	ONE("stack",      S_IRUSR, proc_pid_stack),
 #endif
 #ifdef CONFIG_SCHEDSTATS
-	INF("schedstat",  S_IRUGO, proc_pid_schedstat),
+	ONE("schedstat",  S_IRUGO, proc_pid_schedstat),
 #endif
 #ifdef CONFIG_LATENCYTOP
 	REG("latency",  S_IRUGO, proc_lstats_operations),
@@ -2611,7 +2578,7 @@ static const struct pid_entry tgid_base_stuff[] = {
 #ifdef CONFIG_CGROUPS
 	REG("cgroup",  S_IRUGO, proc_cgroup_operations),
 #endif
-	INF("oom_score",  S_IRUGO, proc_oom_score),
+	ONE("oom_score",  S_IRUGO, proc_oom_score),
 	REG("oom_adj",    S_IRUGO|S_IWUSR, proc_oom_adj_operations),
 	REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
 #ifdef CONFIG_AUDITSYSCALL
@@ -2625,10 +2592,10 @@ static const struct pid_entry tgid_base_stuff[] = {
 	REG("coredump_filter", S_IRUGO|S_IWUSR, proc_coredump_filter_operations),
 #endif
 #ifdef CONFIG_TASK_IO_ACCOUNTING
-	INF("io",	S_IRUSR, proc_tgid_io_accounting),
+	ONE("io",	S_IRUSR, proc_tgid_io_accounting),
 #endif
 #ifdef CONFIG_HARDWALL
-	INF("hardwall",   S_IRUGO, proc_pid_hardwall),
+	ONE("hardwall",   S_IRUGO, proc_pid_hardwall),
 #endif
 #ifdef CONFIG_USER_NS
 	REG("uid_map",    S_IRUGO|S_IWUSR, proc_uid_map_operations),
@@ -2780,12 +2747,12 @@ out:
 
 struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
 {
-	int result = 0;
+	int result = -ENOENT;
 	struct task_struct *task;
 	unsigned tgid;
 	struct pid_namespace *ns;
 
-	tgid = name_to_int(dentry);
+	tgid = name_to_int(&dentry->d_name);
 	if (tgid == ~0U)
 		goto out;
 
@@ -2896,18 +2863,18 @@ static const struct pid_entry tid_base_stuff[] = {
 	DIR("fdinfo",    S_IRUSR|S_IXUSR, proc_fdinfo_inode_operations, proc_fdinfo_operations),
 	DIR("ns",	 S_IRUSR|S_IXUGO, proc_ns_dir_inode_operations, proc_ns_dir_operations),
 	REG("environ",   S_IRUSR, proc_environ_operations),
-	INF("auxv",      S_IRUSR, proc_pid_auxv),
+	ONE("auxv",      S_IRUSR, proc_pid_auxv),
 	ONE("status",    S_IRUGO, proc_pid_status),
 	ONE("personality", S_IRUSR, proc_pid_personality),
-	INF("limits",	 S_IRUGO, proc_pid_limits),
+	ONE("limits",	 S_IRUGO, proc_pid_limits),
 #ifdef CONFIG_SCHED_DEBUG
 	REG("sched",     S_IRUGO|S_IWUSR, proc_pid_sched_operations),
 #endif
 	REG("comm",      S_IRUGO|S_IWUSR, proc_pid_set_comm_operations),
 #ifdef CONFIG_HAVE_ARCH_TRACEHOOK
-	INF("syscall",   S_IRUSR, proc_pid_syscall),
+	ONE("syscall",   S_IRUSR, proc_pid_syscall),
 #endif
-	INF("cmdline",   S_IRUGO, proc_pid_cmdline),
+	ONE("cmdline",   S_IRUGO, proc_pid_cmdline),
 	ONE("stat",      S_IRUGO, proc_tid_stat),
 	ONE("statm",     S_IRUGO, proc_pid_statm),
 	REG("maps",      S_IRUGO, proc_tid_maps_operations),
@@ -2932,13 +2899,13 @@ static const struct pid_entry tid_base_stuff[] = {
 	DIR("attr",      S_IRUGO|S_IXUGO, proc_attr_dir_inode_operations, proc_attr_dir_operations),
 #endif
 #ifdef CONFIG_KALLSYMS
-	INF("wchan",     S_IRUGO, proc_pid_wchan),
+	ONE("wchan",     S_IRUGO, proc_pid_wchan),
 #endif
 #ifdef CONFIG_STACKTRACE
 	ONE("stack",      S_IRUSR, proc_pid_stack),
 #endif
 #ifdef CONFIG_SCHEDSTATS
-	INF("schedstat", S_IRUGO, proc_pid_schedstat),
+	ONE("schedstat", S_IRUGO, proc_pid_schedstat),
 #endif
 #ifdef CONFIG_LATENCYTOP
 	REG("latency",  S_IRUGO, proc_lstats_operations),
@@ -2949,7 +2916,7 @@ static const struct pid_entry tid_base_stuff[] = {
 #ifdef CONFIG_CGROUPS
 	REG("cgroup",  S_IRUGO, proc_cgroup_operations),
 #endif
-	INF("oom_score", S_IRUGO, proc_oom_score),
+	ONE("oom_score", S_IRUGO, proc_oom_score),
 	REG("oom_adj",   S_IRUGO|S_IWUSR, proc_oom_adj_operations),
 	REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
 #ifdef CONFIG_AUDITSYSCALL
@@ -2960,10 +2927,10 @@ static const struct pid_entry tid_base_stuff[] = {
 	REG("make-it-fail", S_IRUGO|S_IWUSR, proc_fault_inject_operations),
 #endif
 #ifdef CONFIG_TASK_IO_ACCOUNTING
-	INF("io",	S_IRUSR, proc_tid_io_accounting),
+	ONE("io",	S_IRUSR, proc_tid_io_accounting),
 #endif
 #ifdef CONFIG_HARDWALL
-	INF("hardwall",   S_IRUGO, proc_pid_hardwall),
+	ONE("hardwall",   S_IRUGO, proc_pid_hardwall),
 #endif
 #ifdef CONFIG_USER_NS
 	REG("uid_map",    S_IRUGO|S_IWUSR, proc_uid_map_operations),
@@ -3033,7 +3000,7 @@ static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry
 	if (!leader)
 		goto out_no_task;
 
-	tid = name_to_int(dentry);
+	tid = name_to_int(&dentry->d_name);
 	if (tid == ~0U)
 		goto out;
 
diff --git a/fs/proc/fd.c b/fs/proc/fd.c
index 0788d093f5d8..955bb55fab8c 100644
--- a/fs/proc/fd.c
+++ b/fs/proc/fd.c
@@ -206,7 +206,7 @@ static struct dentry *proc_lookupfd_common(struct inode *dir,
 {
 	struct task_struct *task = get_proc_task(dir);
 	int result = -ENOENT;
-	unsigned fd = name_to_int(dentry);
+	unsigned fd = name_to_int(&dentry->d_name);
 
 	if (!task)
 		goto out_no_task;
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index b7f268eb5f45..317b72641ebf 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -27,7 +27,7 @@
 
 #include "internal.h"
 
-DEFINE_SPINLOCK(proc_subdir_lock);
+static DEFINE_SPINLOCK(proc_subdir_lock);
 
 static int proc_match(unsigned int len, const char *name, struct proc_dir_entry *de)
 {
@@ -330,28 +330,28 @@ static struct proc_dir_entry *__proc_create(struct proc_dir_entry **parent,
 					  nlink_t nlink)
 {
 	struct proc_dir_entry *ent = NULL;
-	const char *fn = name;
-	unsigned int len;
-
-	/* make sure name is valid */
-	if (!name || !strlen(name))
-		goto out;
+	const char *fn;
+	struct qstr qstr;
 
 	if (xlate_proc_name(name, parent, &fn) != 0)
 		goto out;
+	qstr.name = fn;
+	qstr.len = strlen(fn);
+	if (qstr.len == 0 || qstr.len >= 256) {
+		WARN(1, "name len %u\n", qstr.len);
+		return NULL;
+	}
+	if (*parent == &proc_root && name_to_int(&qstr) != ~0U) {
+		WARN(1, "create '/proc/%s' by hand\n", qstr.name);
+		return NULL;
+	}
 
-	/* At this point there must not be any '/' characters beyond *fn */
-	if (strchr(fn, '/'))
-		goto out;
-
-	len = strlen(fn);
-
-	ent = kzalloc(sizeof(struct proc_dir_entry) + len + 1, GFP_KERNEL);
+	ent = kzalloc(sizeof(struct proc_dir_entry) + qstr.len + 1, GFP_KERNEL);
 	if (!ent)
 		goto out;
 
-	memcpy(ent->name, fn, len + 1);
-	ent->namelen = len;
+	memcpy(ent->name, fn, qstr.len + 1);
+	ent->namelen = qstr.len;
 	ent->mode = mode;
 	ent->nlink = nlink;
 	atomic_set(&ent->count, 1);
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 3ab6d14e71c5..a024cf7b260f 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -52,7 +52,6 @@ struct proc_dir_entry {
 
 union proc_op {
 	int (*proc_get_link)(struct dentry *, struct path *);
-	int (*proc_read)(struct task_struct *task, char *page);
 	int (*proc_show)(struct seq_file *m,
 		struct pid_namespace *ns, struct pid *pid,
 		struct task_struct *task);
@@ -112,10 +111,10 @@ static inline int task_dumpable(struct task_struct *task)
 	return 0;
 }
 
-static inline unsigned name_to_int(struct dentry *dentry)
+static inline unsigned name_to_int(const struct qstr *qstr)
 {
-	const char *name = dentry->d_name.name;
-	int len = dentry->d_name.len;
+	const char *name = qstr->name;
+	int len = qstr->len;
 	unsigned n = 0;
 
 	if (len > 1 && *name == '0')
@@ -178,8 +177,6 @@ extern bool proc_fill_cache(struct file *, struct dir_context *, const char *, i
 /*
  * generic.c
  */
-extern spinlock_t proc_subdir_lock;
-
 extern struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int);
 extern struct dentry *proc_lookup_de(struct proc_dir_entry *, struct inode *,
 				     struct dentry *);
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 39e6ef32f0bd..6df8d0722c97 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -172,7 +172,7 @@ get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head)
 
 	start = ((unsigned long)pfn_to_page(pfn)) & PAGE_MASK;
 	end = ((unsigned long)pfn_to_page(pfn + nr_pages)) - 1;
-	end = ALIGN(end, PAGE_SIZE);
+	end = PAGE_ALIGN(end);
 	/* overlap check (because we have to align page */
 	list_for_each_entry(tmp, head, list) {
 		if (tmp->type != KCORE_VMEMMAP)
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 71290463a1d3..f92d5dd578a4 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -632,7 +632,7 @@ out:
 	return ret;
 }
 
-static int scan(struct ctl_table_header *head, ctl_table *table,
+static int scan(struct ctl_table_header *head, struct ctl_table *table,
 		unsigned long *pos, struct file *file,
 		struct dir_context *ctx)
 {
diff --git a/fs/proc/proc_tty.c b/fs/proc/proc_tty.c
index cb761f010300..15f327bed8c6 100644
--- a/fs/proc/proc_tty.c
+++ b/fs/proc/proc_tty.c
@@ -18,7 +18,7 @@
 /*
  * The /proc/tty directory inodes...
  */
-static struct proc_dir_entry *proc_tty_ldisc, *proc_tty_driver;
+static struct proc_dir_entry *proc_tty_driver;
 
 /*
  * This is the handler for /proc/tty/drivers
@@ -176,7 +176,7 @@ void __init proc_tty_init(void)
 {
 	if (!proc_mkdir("tty", NULL))
 		return;
-	proc_tty_ldisc = proc_mkdir("tty/ldisc", NULL);
+	proc_mkdir("tty/ldisc", NULL);	/* Preserved: it's userspace visible */
 	/*
 	 * /proc/tty/driver/serial reveals the exact character counts for
 	 * serial links which is just too easy to abuse for inferring
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 5dbadecb234d..574bafc41f0b 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -199,10 +199,10 @@ static int proc_root_getattr(struct vfsmount *mnt, struct dentry *dentry, struct
 
 static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags)
 {
-	if (!proc_lookup(dir, dentry, flags))
+	if (!proc_pid_lookup(dir, dentry, flags))
 		return NULL;
 	
-	return proc_pid_lookup(dir, dentry, flags);
+	return proc_lookup(dir, dentry, flags);
 }
 
 static int proc_root_readdir(struct file *file, struct dir_context *ctx)
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 382aa890e228..a90d6d354199 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -328,6 +328,82 @@ static inline char *alloc_elfnotes_buf(size_t notes_sz)
  * virtually contiguous user-space in ELF layout.
  */
 #ifdef CONFIG_MMU
+/*
+ * remap_oldmem_pfn_checked - do remap_oldmem_pfn_range replacing all pages
+ * reported as not being ram with the zero page.
+ *
+ * @vma: vm_area_struct describing requested mapping
+ * @from: start remapping from
+ * @pfn: page frame number to start remapping to
+ * @size: remapping size
+ * @prot: protection bits
+ *
+ * Returns zero on success, -EAGAIN on failure.
+ */
+static int remap_oldmem_pfn_checked(struct vm_area_struct *vma,
+				    unsigned long from, unsigned long pfn,
+				    unsigned long size, pgprot_t prot)
+{
+	unsigned long map_size;
+	unsigned long pos_start, pos_end, pos;
+	unsigned long zeropage_pfn = my_zero_pfn(0);
+	size_t len = 0;
+
+	pos_start = pfn;
+	pos_end = pfn + (size >> PAGE_SHIFT);
+
+	for (pos = pos_start; pos < pos_end; ++pos) {
+		if (!pfn_is_ram(pos)) {
+			/*
+			 * We hit a page which is not ram. Remap the continuous
+			 * region between pos_start and pos-1 and replace
+			 * the non-ram page at pos with the zero page.
+			 */
+			if (pos > pos_start) {
+				/* Remap continuous region */
+				map_size = (pos - pos_start) << PAGE_SHIFT;
+				if (remap_oldmem_pfn_range(vma, from + len,
+							   pos_start, map_size,
+							   prot))
+					goto fail;
+				len += map_size;
+			}
+			/* Remap the zero page */
+			if (remap_oldmem_pfn_range(vma, from + len,
+						   zeropage_pfn,
+						   PAGE_SIZE, prot))
+				goto fail;
+			len += PAGE_SIZE;
+			pos_start = pos + 1;
+		}
+	}
+	if (pos > pos_start) {
+		/* Remap the rest */
+		map_size = (pos - pos_start) << PAGE_SHIFT;
+		if (remap_oldmem_pfn_range(vma, from + len, pos_start,
+					   map_size, prot))
+			goto fail;
+	}
+	return 0;
+fail:
+	do_munmap(vma->vm_mm, from, len);
+	return -EAGAIN;
+}
+
+static int vmcore_remap_oldmem_pfn(struct vm_area_struct *vma,
+			    unsigned long from, unsigned long pfn,
+			    unsigned long size, pgprot_t prot)
+{
+	/*
+	 * Check if oldmem_pfn_is_ram was registered to avoid
+	 * looping over all pages without a reason.
+	 */
+	if (oldmem_pfn_is_ram)
+		return remap_oldmem_pfn_checked(vma, from, pfn, size, prot);
+	else
+		return remap_oldmem_pfn_range(vma, from, pfn, size, prot);
+}
+
 static int mmap_vmcore(struct file *file, struct vm_area_struct *vma)
 {
 	size_t size = vma->vm_end - vma->vm_start;
@@ -387,9 +463,9 @@ static int mmap_vmcore(struct file *file, struct vm_area_struct *vma)
 
 			tsz = min_t(size_t, m->offset + m->size - start, size);
 			paddr = m->paddr + start - m->offset;
-			if (remap_oldmem_pfn_range(vma, vma->vm_start + len,
-						   paddr >> PAGE_SHIFT, tsz,
-						   vma->vm_page_prot))
+			if (vmcore_remap_oldmem_pfn(vma, vma->vm_start + len,
+						    paddr >> PAGE_SHIFT, tsz,
+						    vma->vm_page_prot))
 				goto fail;
 			size -= tsz;
 			start += tsz;
diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c
index 34a1e5aa848c..9d7b9a83699e 100644
--- a/fs/pstore/ram_core.c
+++ b/fs/pstore/ram_core.c
@@ -394,7 +394,7 @@ static void *persistent_ram_vmap(phys_addr_t start, size_t size)
 
 	prot = pgprot_noncached(PAGE_KERNEL);
 
-	pages = kmalloc(sizeof(struct page *) * page_count, GFP_KERNEL);
+	pages = kmalloc_array(page_count, sizeof(struct page *), GFP_KERNEL);
 	if (!pages) {
 		pr_err("%s: Failed to allocate array for %u pages\n",
 		       __func__, page_count);
diff --git a/fs/qnx6/Makefile b/fs/qnx6/Makefile
index 9dd06199afc9..5e6bae6fae50 100644
--- a/fs/qnx6/Makefile
+++ b/fs/qnx6/Makefile
@@ -5,3 +5,4 @@
 obj-$(CONFIG_QNX6FS_FS) += qnx6.o
 
 qnx6-objs := inode.o dir.o namei.o super_mmi.o
+ccflags-$(CONFIG_QNX6FS_DEBUG)	+= -DDEBUG
diff --git a/fs/qnx6/dir.c b/fs/qnx6/dir.c
index 15b7d92ed60d..8d64bb5366bf 100644
--- a/fs/qnx6/dir.c
+++ b/fs/qnx6/dir.c
@@ -77,21 +77,20 @@ static int qnx6_dir_longfilename(struct inode *inode,
 	if (de->de_size != 0xff) {
 		/* error - long filename entries always have size 0xff
 		   in direntry */
-		printk(KERN_ERR "qnx6: invalid direntry size (%i).\n",
-				de->de_size);
+		pr_err("invalid direntry size (%i).\n", de->de_size);
 		return 0;
 	}
 	lf = qnx6_longname(s, de, &page);
 	if (IS_ERR(lf)) {
-		printk(KERN_ERR "qnx6:Error reading longname\n");
+		pr_err("Error reading longname\n");
 		return 0;
 	}
 
 	lf_size = fs16_to_cpu(sbi, lf->lf_size);
 
 	if (lf_size > QNX6_LONG_NAME_MAX) {
-		QNX6DEBUG((KERN_INFO "file %s\n", lf->lf_fname));
-		printk(KERN_ERR "qnx6:Filename too long (%i)\n", lf_size);
+		pr_debug("file %s\n", lf->lf_fname);
+		pr_err("Filename too long (%i)\n", lf_size);
 		qnx6_put_page(page);
 		return 0;
 	}
@@ -100,10 +99,10 @@ static int qnx6_dir_longfilename(struct inode *inode,
 	   mmi 3g filesystem does not have that checksum */
 	if (!test_opt(s, MMI_FS) && fs32_to_cpu(sbi, de->de_checksum) !=
 			qnx6_lfile_checksum(lf->lf_fname, lf_size))
-		printk(KERN_INFO "qnx6: long filename checksum error.\n");
+		pr_info("long filename checksum error.\n");
 
-	QNX6DEBUG((KERN_INFO "qnx6_readdir:%.*s inode:%u\n",
-					lf_size, lf->lf_fname, de_inode));
+	pr_debug("qnx6_readdir:%.*s inode:%u\n",
+		 lf_size, lf->lf_fname, de_inode);
 	if (!dir_emit(ctx, lf->lf_fname, lf_size, de_inode, DT_UNKNOWN)) {
 		qnx6_put_page(page);
 		return 0;
@@ -136,7 +135,7 @@ static int qnx6_readdir(struct file *file, struct dir_context *ctx)
 		int i = start;
 
 		if (IS_ERR(page)) {
-			printk(KERN_ERR "qnx6_readdir: read failed\n");
+			pr_err("%s(): read failed\n", __func__);
 			ctx->pos = (n + 1) << PAGE_CACHE_SHIFT;
 			return PTR_ERR(page);
 		}
@@ -159,9 +158,9 @@ static int qnx6_readdir(struct file *file, struct dir_context *ctx)
 					break;
 				}
 			} else {
-				QNX6DEBUG((KERN_INFO "qnx6_readdir:%.*s"
-				   " inode:%u\n", size, de->de_fname,
-							no_inode));
+				pr_debug("%s():%.*s inode:%u\n",
+					 __func__, size, de->de_fname,
+					 no_inode);
 				if (!dir_emit(ctx, de->de_fname, size,
 				      no_inode, DT_UNKNOWN)) {
 					done = true;
@@ -259,8 +258,7 @@ unsigned qnx6_find_entry(int len, struct inode *dir, const char *name,
 					if (ino)
 						goto found;
 				} else
-					printk(KERN_ERR "qnx6: undefined "
-						"filename size in inode.\n");
+					pr_err("undefined filename size in inode.\n");
 			}
 			qnx6_put_page(page);
 		}
diff --git a/fs/qnx6/inode.c b/fs/qnx6/inode.c
index 65cdaab3ed49..44e73923670d 100644
--- a/fs/qnx6/inode.c
+++ b/fs/qnx6/inode.c
@@ -73,8 +73,8 @@ static int qnx6_get_block(struct inode *inode, sector_t iblock,
 {
 	unsigned phys;
 
-	QNX6DEBUG((KERN_INFO "qnx6: qnx6_get_block inode=[%ld] iblock=[%ld]\n",
-			inode->i_ino, (unsigned long)iblock));
+	pr_debug("qnx6_get_block inode=[%ld] iblock=[%ld]\n",
+		 inode->i_ino, (unsigned long)iblock);
 
 	phys = qnx6_block_map(inode, iblock);
 	if (phys) {
@@ -87,7 +87,7 @@ static int qnx6_get_block(struct inode *inode, sector_t iblock,
 static int qnx6_check_blockptr(__fs32 ptr)
 {
 	if (ptr == ~(__fs32)0) {
-		printk(KERN_ERR "qnx6: hit unused blockpointer.\n");
+		pr_err("hit unused blockpointer.\n");
 		return 0;
 	}
 	return 1;
@@ -127,8 +127,7 @@ static unsigned qnx6_block_map(struct inode *inode, unsigned no)
 	levelptr = no >> bitdelta;
 
 	if (levelptr > QNX6_NO_DIRECT_POINTERS - 1) {
-		printk(KERN_ERR "qnx6:Requested file block number (%u) too big.",
-				no);
+		pr_err("Requested file block number (%u) too big.", no);
 		return 0;
 	}
 
@@ -137,8 +136,7 @@ static unsigned qnx6_block_map(struct inode *inode, unsigned no)
 	for (i = 0; i < depth; i++) {
 		bh = sb_bread(s, block);
 		if (!bh) {
-			printk(KERN_ERR "qnx6:Error reading block (%u)\n",
-					block);
+			pr_err("Error reading block (%u)\n", block);
 			return 0;
 		}
 		bitdelta -= ptrbits;
@@ -207,26 +205,16 @@ void qnx6_superblock_debug(struct qnx6_super_block *sb, struct super_block *s)
 {
 	struct qnx6_sb_info *sbi = QNX6_SB(s);
 
-	QNX6DEBUG((KERN_INFO "magic: %08x\n",
-				fs32_to_cpu(sbi, sb->sb_magic)));
-	QNX6DEBUG((KERN_INFO "checksum: %08x\n",
-				fs32_to_cpu(sbi, sb->sb_checksum)));
-	QNX6DEBUG((KERN_INFO "serial: %llx\n",
-				fs64_to_cpu(sbi, sb->sb_serial)));
-	QNX6DEBUG((KERN_INFO "flags: %08x\n",
-				fs32_to_cpu(sbi, sb->sb_flags)));
-	QNX6DEBUG((KERN_INFO "blocksize: %08x\n",
-				fs32_to_cpu(sbi, sb->sb_blocksize)));
-	QNX6DEBUG((KERN_INFO "num_inodes: %08x\n",
-				fs32_to_cpu(sbi, sb->sb_num_inodes)));
-	QNX6DEBUG((KERN_INFO "free_inodes: %08x\n",
-				fs32_to_cpu(sbi, sb->sb_free_inodes)));
-	QNX6DEBUG((KERN_INFO "num_blocks: %08x\n",
-				fs32_to_cpu(sbi, sb->sb_num_blocks)));
-	QNX6DEBUG((KERN_INFO "free_blocks: %08x\n",
-				fs32_to_cpu(sbi, sb->sb_free_blocks)));
-	QNX6DEBUG((KERN_INFO "inode_levels: %02x\n",
-				sb->Inode.levels));
+	pr_debug("magic: %08x\n", fs32_to_cpu(sbi, sb->sb_magic));
+	pr_debug("checksum: %08x\n", fs32_to_cpu(sbi, sb->sb_checksum));
+	pr_debug("serial: %llx\n", fs64_to_cpu(sbi, sb->sb_serial));
+	pr_debug("flags: %08x\n", fs32_to_cpu(sbi, sb->sb_flags));
+	pr_debug("blocksize: %08x\n", fs32_to_cpu(sbi, sb->sb_blocksize));
+	pr_debug("num_inodes: %08x\n", fs32_to_cpu(sbi, sb->sb_num_inodes));
+	pr_debug("free_inodes: %08x\n", fs32_to_cpu(sbi, sb->sb_free_inodes));
+	pr_debug("num_blocks: %08x\n", fs32_to_cpu(sbi, sb->sb_num_blocks));
+	pr_debug("free_blocks: %08x\n", fs32_to_cpu(sbi, sb->sb_free_blocks));
+	pr_debug("inode_levels: %02x\n", sb->Inode.levels);
 }
 #endif
 
@@ -277,7 +265,7 @@ static struct buffer_head *qnx6_check_first_superblock(struct super_block *s,
 	   start with the first superblock */
 	bh = sb_bread(s, offset);
 	if (!bh) {
-		printk(KERN_ERR "qnx6: unable to read the first superblock\n");
+		pr_err("unable to read the first superblock\n");
 		return NULL;
 	}
 	sb = (struct qnx6_super_block *)bh->b_data;
@@ -285,20 +273,16 @@ static struct buffer_head *qnx6_check_first_superblock(struct super_block *s,
 		sbi->s_bytesex = BYTESEX_BE;
 		if (fs32_to_cpu(sbi, sb->sb_magic) == QNX6_SUPER_MAGIC) {
 			/* we got a big endian fs */
-			QNX6DEBUG((KERN_INFO "qnx6: fs got different"
-					" endianness.\n"));
+			pr_debug("fs got different endianness.\n");
 			return bh;
 		} else
 			sbi->s_bytesex = BYTESEX_LE;
 		if (!silent) {
 			if (offset == 0) {
-				printk(KERN_ERR "qnx6: wrong signature (magic)"
-					" in superblock #1.\n");
+				pr_err("wrong signature (magic) in superblock #1.\n");
 			} else {
-				printk(KERN_INFO "qnx6: wrong signature (magic)"
-					" at position (0x%lx) - will try"
-					" alternative position (0x0000).\n",
-						offset * s->s_blocksize);
+				pr_info("wrong signature (magic) at position (0x%lx) - will try alternative position (0x0000).\n",
+					offset * s->s_blocksize);
 			}
 		}
 		brelse(bh);
@@ -329,13 +313,13 @@ static int qnx6_fill_super(struct super_block *s, void *data, int silent)
 
 	/* Superblock always is 512 Byte long */
 	if (!sb_set_blocksize(s, QNX6_SUPERBLOCK_SIZE)) {
-		printk(KERN_ERR "qnx6: unable to set blocksize\n");
+		pr_err("unable to set blocksize\n");
 		goto outnobh;
 	}
 
 	/* parse the mount-options */
 	if (!qnx6_parse_options((char *) data, s)) {
-		printk(KERN_ERR "qnx6: invalid mount options.\n");
+		pr_err("invalid mount options.\n");
 		goto outnobh;
 	}
 	if (test_opt(s, MMI_FS)) {
@@ -355,7 +339,7 @@ static int qnx6_fill_super(struct super_block *s, void *data, int silent)
 		/* try again without bootblock offset */
 		bh1 = qnx6_check_first_superblock(s, 0, silent);
 		if (!bh1) {
-			printk(KERN_ERR "qnx6: unable to read the first superblock\n");
+			pr_err("unable to read the first superblock\n");
 			goto outnobh;
 		}
 		/* seems that no bootblock at partition start */
@@ -370,13 +354,13 @@ static int qnx6_fill_super(struct super_block *s, void *data, int silent)
 	/* checksum check - start at byte 8 and end at byte 512 */
 	if (fs32_to_cpu(sbi, sb1->sb_checksum) !=
 			crc32_be(0, (char *)(bh1->b_data + 8), 504)) {
-		printk(KERN_ERR "qnx6: superblock #1 checksum error\n");
+		pr_err("superblock #1 checksum error\n");
 		goto out;
 	}
 
 	/* set new blocksize */
 	if (!sb_set_blocksize(s, fs32_to_cpu(sbi, sb1->sb_blocksize))) {
-		printk(KERN_ERR "qnx6: unable to set blocksize\n");
+		pr_err("unable to set blocksize\n");
 		goto out;
 	}
 	/* blocksize invalidates bh - pull it back in */
@@ -398,21 +382,20 @@ static int qnx6_fill_super(struct super_block *s, void *data, int silent)
 	/* next the second superblock */
 	bh2 = sb_bread(s, offset);
 	if (!bh2) {
-		printk(KERN_ERR "qnx6: unable to read the second superblock\n");
+		pr_err("unable to read the second superblock\n");
 		goto out;
 	}
 	sb2 = (struct qnx6_super_block *)bh2->b_data;
 	if (fs32_to_cpu(sbi, sb2->sb_magic) != QNX6_SUPER_MAGIC) {
 		if (!silent)
-			printk(KERN_ERR "qnx6: wrong signature (magic)"
-					" in superblock #2.\n");
+			pr_err("wrong signature (magic) in superblock #2.\n");
 		goto out;
 	}
 
 	/* checksum check - start at byte 8 and end at byte 512 */
 	if (fs32_to_cpu(sbi, sb2->sb_checksum) !=
 				crc32_be(0, (char *)(bh2->b_data + 8), 504)) {
-		printk(KERN_ERR "qnx6: superblock #2 checksum error\n");
+		pr_err("superblock #2 checksum error\n");
 		goto out;
 	}
 
@@ -422,25 +405,24 @@ static int qnx6_fill_super(struct super_block *s, void *data, int silent)
 		sbi->sb_buf = bh1;
 		sbi->sb = (struct qnx6_super_block *)bh1->b_data;
 		brelse(bh2);
-		printk(KERN_INFO "qnx6: superblock #1 active\n");
+		pr_info("superblock #1 active\n");
 	} else {
 		/* superblock #2 active */
 		sbi->sb_buf = bh2;
 		sbi->sb = (struct qnx6_super_block *)bh2->b_data;
 		brelse(bh1);
-		printk(KERN_INFO "qnx6: superblock #2 active\n");
+		pr_info("superblock #2 active\n");
 	}
 mmi_success:
 	/* sanity check - limit maximum indirect pointer levels */
 	if (sb1->Inode.levels > QNX6_PTR_MAX_LEVELS) {
-		printk(KERN_ERR "qnx6: too many inode levels (max %i, sb %i)\n",
-			QNX6_PTR_MAX_LEVELS, sb1->Inode.levels);
+		pr_err("too many inode levels (max %i, sb %i)\n",
+		       QNX6_PTR_MAX_LEVELS, sb1->Inode.levels);
 		goto out;
 	}
 	if (sb1->Longfile.levels > QNX6_PTR_MAX_LEVELS) {
-		printk(KERN_ERR "qnx6: too many longfilename levels"
-				" (max %i, sb %i)\n",
-			QNX6_PTR_MAX_LEVELS, sb1->Longfile.levels);
+		pr_err("too many longfilename levels (max %i, sb %i)\n",
+		       QNX6_PTR_MAX_LEVELS, sb1->Longfile.levels);
 		goto out;
 	}
 	s->s_op = &qnx6_sops;
@@ -460,7 +442,7 @@ mmi_success:
 	/* prefetch root inode */
 	root = qnx6_iget(s, QNX6_ROOT_INO);
 	if (IS_ERR(root)) {
-		printk(KERN_ERR "qnx6: get inode failed\n");
+		pr_err("get inode failed\n");
 		ret = PTR_ERR(root);
 		goto out2;
 	}
@@ -474,7 +456,7 @@ mmi_success:
 	errmsg = qnx6_checkroot(s);
 	if (errmsg != NULL) {
 		if (!silent)
-			printk(KERN_ERR "qnx6: %s\n", errmsg);
+			pr_err("%s\n", errmsg);
 		goto out3;
 	}
 	return 0;
@@ -555,8 +537,7 @@ struct inode *qnx6_iget(struct super_block *sb, unsigned ino)
 	inode->i_mode = 0;
 
 	if (ino == 0) {
-		printk(KERN_ERR "qnx6: bad inode number on dev %s: %u is "
-				"out of range\n",
+		pr_err("bad inode number on dev %s: %u is out of range\n",
 		       sb->s_id, ino);
 		iget_failed(inode);
 		return ERR_PTR(-EIO);
@@ -566,8 +547,8 @@ struct inode *qnx6_iget(struct super_block *sb, unsigned ino)
 	mapping = sbi->inodes->i_mapping;
 	page = read_mapping_page(mapping, n, NULL);
 	if (IS_ERR(page)) {
-		printk(KERN_ERR "qnx6: major problem: unable to read inode from "
-		       "dev %s\n", sb->s_id);
+		pr_err("major problem: unable to read inode from dev %s\n",
+		       sb->s_id);
 		iget_failed(inode);
 		return ERR_CAST(page);
 	}
@@ -689,7 +670,7 @@ static int __init init_qnx6_fs(void)
 		return err;
 	}
 
-	printk(KERN_INFO "QNX6 filesystem 1.0.0 registered.\n");
+	pr_info("QNX6 filesystem 1.0.0 registered.\n");
 	return 0;
 }
 
diff --git a/fs/qnx6/namei.c b/fs/qnx6/namei.c
index 0561326a94f5..6c1a323137dd 100644
--- a/fs/qnx6/namei.c
+++ b/fs/qnx6/namei.c
@@ -29,12 +29,12 @@ struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
 		foundinode = qnx6_iget(dir->i_sb, ino);
 		qnx6_put_page(page);
 		if (IS_ERR(foundinode)) {
-			QNX6DEBUG((KERN_ERR "qnx6: lookup->iget -> "
-				" error %ld\n", PTR_ERR(foundinode)));
+			pr_debug("lookup->iget ->  error %ld\n",
+				 PTR_ERR(foundinode));
 			return ERR_CAST(foundinode);
 		}
 	} else {
-		QNX6DEBUG((KERN_INFO "qnx6_lookup: not found %s\n", name));
+		pr_debug("%s(): not found %s\n", __func__, name);
 		return NULL;
 	}
 	d_add(dentry, foundinode);
diff --git a/fs/qnx6/qnx6.h b/fs/qnx6/qnx6.h
index b00fcc960d37..d3fb2b698800 100644
--- a/fs/qnx6/qnx6.h
+++ b/fs/qnx6/qnx6.h
@@ -10,6 +10,12 @@
  *
  */
 
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/fs.h>
 #include <linux/pagemap.h>
 
@@ -19,12 +25,6 @@ typedef __u64 __bitwise __fs64;
 
 #include <linux/qnx6_fs.h>
 
-#ifdef CONFIG_QNX6FS_DEBUG
-#define QNX6DEBUG(X) printk X
-#else
-#define QNX6DEBUG(X) (void) 0
-#endif
-
 struct qnx6_sb_info {
 	struct buffer_head	*sb_buf;	/* superblock buffer */
 	struct qnx6_super_block	*sb;		/* our superblock */
diff --git a/fs/qnx6/super_mmi.c b/fs/qnx6/super_mmi.c
index 29c32cba62d6..62aaf3e3126a 100644
--- a/fs/qnx6/super_mmi.c
+++ b/fs/qnx6/super_mmi.c
@@ -44,15 +44,14 @@ struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s, int silent)
 	   start with the first superblock */
 	bh1 = sb_bread(s, 0);
 	if (!bh1) {
-		printk(KERN_ERR "qnx6: Unable to read first mmi superblock\n");
+		pr_err("Unable to read first mmi superblock\n");
 		return NULL;
 	}
 	sb1 = (struct qnx6_mmi_super_block *)bh1->b_data;
 	sbi = QNX6_SB(s);
 	if (fs32_to_cpu(sbi, sb1->sb_magic) != QNX6_SUPER_MAGIC) {
 		if (!silent) {
-			printk(KERN_ERR "qnx6: wrong signature (magic) in"
-					" superblock #1.\n");
+			pr_err("wrong signature (magic) in superblock #1.\n");
 			goto out;
 		}
 	}
@@ -60,7 +59,7 @@ struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s, int silent)
 	/* checksum check - start at byte 8 and end at byte 512 */
 	if (fs32_to_cpu(sbi, sb1->sb_checksum) !=
 				crc32_be(0, (char *)(bh1->b_data + 8), 504)) {
-		printk(KERN_ERR "qnx6: superblock #1 checksum error\n");
+		pr_err("superblock #1 checksum error\n");
 		goto out;
 	}
 
@@ -70,7 +69,7 @@ struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s, int silent)
 
 	/* set new blocksize */
 	if (!sb_set_blocksize(s, fs32_to_cpu(sbi, sb1->sb_blocksize))) {
-		printk(KERN_ERR "qnx6: unable to set blocksize\n");
+		pr_err("unable to set blocksize\n");
 		goto out;
 	}
 	/* blocksize invalidates bh - pull it back in */
@@ -83,27 +82,26 @@ struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s, int silent)
 	/* read second superblock */
 	bh2 = sb_bread(s, offset);
 	if (!bh2) {
-		printk(KERN_ERR "qnx6: unable to read the second superblock\n");
+		pr_err("unable to read the second superblock\n");
 		goto out;
 	}
 	sb2 = (struct qnx6_mmi_super_block *)bh2->b_data;
 	if (fs32_to_cpu(sbi, sb2->sb_magic) != QNX6_SUPER_MAGIC) {
 		if (!silent)
-			printk(KERN_ERR "qnx6: wrong signature (magic) in"
-					" superblock #2.\n");
+			pr_err("wrong signature (magic) in superblock #2.\n");
 		goto out;
 	}
 
 	/* checksum check - start at byte 8 and end at byte 512 */
 	if (fs32_to_cpu(sbi, sb2->sb_checksum)
 			!= crc32_be(0, (char *)(bh2->b_data + 8), 504)) {
-		printk(KERN_ERR "qnx6: superblock #1 checksum error\n");
+		pr_err("superblock #1 checksum error\n");
 		goto out;
 	}
 
 	qsb = kmalloc(sizeof(*qsb), GFP_KERNEL);
 	if (!qsb) {
-		printk(KERN_ERR "qnx6: unable to allocate memory.\n");
+		pr_err("unable to allocate memory.\n");
 		goto out;
 	}
 
@@ -119,7 +117,7 @@ struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s, int silent)
 		sbi->sb_buf = bh1;
 		sbi->sb = (struct qnx6_super_block *)bh1->b_data;
 		brelse(bh2);
-		printk(KERN_INFO "qnx6: superblock #1 active\n");
+		pr_info("superblock #1 active\n");
 	} else {
 		/* superblock #2 active */
 		qnx6_mmi_copy_sb(qsb, sb2);
@@ -131,7 +129,7 @@ struct qnx6_super_block *qnx6_mmi_fill_super(struct super_block *s, int silent)
 		sbi->sb_buf = bh2;
 		sbi->sb = (struct qnx6_super_block *)bh2->b_data;
 		brelse(bh1);
-		printk(KERN_INFO "qnx6: superblock #2 active\n");
+		pr_info("superblock #2 active\n");
 	}
 	kfree(qsb);
 
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index dda012ad4208..bbafbde3471a 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -222,7 +222,7 @@ static unsigned long ramfs_nommu_get_unmapped_area(struct file *file,
 
 	/* gang-find the pages */
 	ret = -ENOMEM;
-	pages = kzalloc(lpages * sizeof(struct page *), GFP_KERNEL);
+	pages = kcalloc(lpages, sizeof(struct page *), GFP_KERNEL);
 	if (!pages)
 		goto out_free;
 
diff --git a/fs/reiserfs/dir.c b/fs/reiserfs/dir.c
index d9f5a60dd59b..0a7dc941aaf4 100644
--- a/fs/reiserfs/dir.c
+++ b/fs/reiserfs/dir.c
@@ -9,7 +9,7 @@
 #include <linux/stat.h>
 #include <linux/buffer_head.h>
 #include <linux/slab.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 extern const struct reiserfs_key MIN_KEY;
 
diff --git a/fs/reiserfs/do_balan.c b/fs/reiserfs/do_balan.c
index 54fdf196bfb2..5739cb99de7b 100644
--- a/fs/reiserfs/do_balan.c
+++ b/fs/reiserfs/do_balan.c
@@ -10,7 +10,7 @@
  * and using buffers obtained after all above.
  */
 
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <linux/time.h>
 #include "reiserfs.h"
 #include <linux/buffer_head.h>
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index db9e80ba53a0..751dd3f4346b 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -6,7 +6,7 @@
 #include "reiserfs.h"
 #include "acl.h"
 #include "xattr.h"
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <linux/pagemap.h>
 #include <linux/swap.h>
 #include <linux/writeback.h>
diff --git a/fs/reiserfs/ibalance.c b/fs/reiserfs/ibalance.c
index 73231b1ebdbe..b751eea32e20 100644
--- a/fs/reiserfs/ibalance.c
+++ b/fs/reiserfs/ibalance.c
@@ -2,7 +2,7 @@
  * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
  */
 
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <linux/string.h>
 #include <linux/time.h>
 #include "reiserfs.h"
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 63b2b0ec49e6..a7eec9888f10 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -11,7 +11,7 @@
 #include <linux/pagemap.h>
 #include <linux/highmem.h>
 #include <linux/slab.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/unaligned.h>
 #include <linux/buffer_head.h>
 #include <linux/mpage.h>
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index 501ed6811a2b..6ec8a30a0911 100644
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@@ -7,7 +7,7 @@
 #include <linux/mount.h>
 #include "reiserfs.h"
 #include <linux/time.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <linux/pagemap.h>
 #include <linux/compat.h>
 
diff --git a/fs/reiserfs/item_ops.c b/fs/reiserfs/item_ops.c
index cfaee912ee09..aca73dd73906 100644
--- a/fs/reiserfs/item_ops.c
+++ b/fs/reiserfs/item_ops.c
@@ -54,7 +54,7 @@ static void sd_print_item(struct item_head *ih, char *item)
 	} else {
 		struct stat_data *sd = (struct stat_data *)item;
 
-		printk("\t0%-6o | %6Lu | %2u | %d | %s\n", sd_v2_mode(sd),
+		printk("\t0%-6o | %6llu | %2u | %d | %s\n", sd_v2_mode(sd),
 		       (unsigned long long)sd_v2_size(sd), sd_v2_nlink(sd),
 		       sd_v2_rdev(sd), print_time(sd_v2_mtime(sd)));
 	}
@@ -408,7 +408,7 @@ static void direntry_print_item(struct item_head *ih, char *item)
 			namebuf[namelen + 2] = 0;
 		}
 
-		printk("%d:  %-15s%-15d%-15d%-15Ld%-15Ld(%s)\n",
+		printk("%d:  %-15s%-15d%-15d%-15lld%-15lld(%s)\n",
 		       i, namebuf,
 		       deh_dir_id(deh), deh_objectid(deh),
 		       GET_HASH_VALUE(deh_offset(deh)),
diff --git a/fs/reiserfs/lbalance.c b/fs/reiserfs/lbalance.c
index d6744c8b24e1..814dda3ec998 100644
--- a/fs/reiserfs/lbalance.c
+++ b/fs/reiserfs/lbalance.c
@@ -2,7 +2,7 @@
  * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
  */
 
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <linux/string.h>
 #include <linux/time.h>
 #include "reiserfs.h"
diff --git a/fs/reiserfs/prints.c b/fs/reiserfs/prints.c
index c9b47e91baf8..ae1dc841db3a 100644
--- a/fs/reiserfs/prints.c
+++ b/fs/reiserfs/prints.c
@@ -17,7 +17,7 @@ static char off_buf[80];
 static char *reiserfs_cpu_offset(struct cpu_key *key)
 {
 	if (cpu_key_k_type(key) == TYPE_DIRENTRY)
-		sprintf(off_buf, "%Lu(%Lu)",
+		sprintf(off_buf, "%llu(%llu)",
 			(unsigned long long)
 			GET_HASH_VALUE(cpu_key_k_offset(key)),
 			(unsigned long long)
@@ -34,7 +34,7 @@ static char *le_offset(struct reiserfs_key *key)
 
 	version = le_key_version(key);
 	if (le_key_k_type(version, key) == TYPE_DIRENTRY)
-		sprintf(off_buf, "%Lu(%Lu)",
+		sprintf(off_buf, "%llu(%llu)",
 			(unsigned long long)
 			GET_HASH_VALUE(le_key_k_offset(version, key)),
 			(unsigned long long)
diff --git a/fs/reiserfs/procfs.c b/fs/reiserfs/procfs.c
index 02b0b7d0f7d5..621b9f381fe1 100644
--- a/fs/reiserfs/procfs.c
+++ b/fs/reiserfs/procfs.c
@@ -11,7 +11,7 @@
 #include <linux/module.h>
 #include <linux/time.h>
 #include <linux/seq_file.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include "reiserfs.h"
 #include <linux/init.h>
 #include <linux/proc_fs.h>
diff --git a/fs/reiserfs/stree.c b/fs/reiserfs/stree.c
index dd44468edc2b..24cbe013240f 100644
--- a/fs/reiserfs/stree.c
+++ b/fs/reiserfs/stree.c
@@ -2006,7 +2006,7 @@ int reiserfs_do_truncate(struct reiserfs_transaction_handle *th,
 					    &s_search_path) == POSITION_FOUND);
 
 	RFALSE(file_size > ROUND_UP(new_file_size),
-	       "PAP-5680: truncate did not finish: new_file_size %Ld, current %Ld, oid %d",
+	       "PAP-5680: truncate did not finish: new_file_size %lld, current %lld, oid %d",
 	       new_file_size, file_size, s_item_key.on_disk_key.k_objectid);
 
 update_and_out:
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index a392cef6acc6..709ea92d716f 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -15,7 +15,7 @@
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/time.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include "reiserfs.h"
 #include "acl.h"
 #include "xattr.h"
@@ -331,7 +331,7 @@ static int finish_unfinished(struct super_block *s)
 			 * not completed truncate found. New size was
 			 * committed together with "save" link
 			 */
-			reiserfs_info(s, "Truncating %k to %Ld ..",
+			reiserfs_info(s, "Truncating %k to %lld ..",
 				      INODE_PKEY(inode), inode->i_size);
 
 			/* don't update modification time */
@@ -1577,7 +1577,7 @@ static int read_super_block(struct super_block *s, int offset)
 	rs = (struct reiserfs_super_block *)bh->b_data;
 	if (sb_blocksize(rs) != s->s_blocksize) {
 		reiserfs_warning(s, "sh-2011", "can't find a reiserfs "
-				 "filesystem on (dev %s, block %Lu, size %lu)",
+				 "filesystem on (dev %s, block %llu, size %lu)",
 				 s->s_id,
 				 (unsigned long long)bh->b_blocknr,
 				 s->s_blocksize);
@@ -2441,8 +2441,7 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
 	struct buffer_head tmp_bh, *bh;
 
 	if (!current->journal_info) {
-		printk(KERN_WARNING "reiserfs: Quota write (off=%Lu, len=%Lu)"
-			" cancelled because transaction is not started.\n",
+		printk(KERN_WARNING "reiserfs: Quota write (off=%llu, len=%llu) cancelled because transaction is not started.\n",
 			(unsigned long long)off, (unsigned long long)len);
 		return -EIO;
 	}
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index ca416d099e7d..7c36898af402 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -45,7 +45,7 @@
 #include <linux/xattr.h>
 #include "xattr.h"
 #include "acl.h"
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <net/checksum.h>
 #include <linux/stat.h>
 #include <linux/quotaops.h>
@@ -84,6 +84,7 @@ static int xattr_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 static int xattr_unlink(struct inode *dir, struct dentry *dentry)
 {
 	int error;
+
 	BUG_ON(!mutex_is_locked(&dir->i_mutex));
 
 	mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD);
@@ -98,6 +99,7 @@ static int xattr_unlink(struct inode *dir, struct dentry *dentry)
 static int xattr_rmdir(struct inode *dir, struct dentry *dentry)
 {
 	int error;
+
 	BUG_ON(!mutex_is_locked(&dir->i_mutex));
 
 	mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD);
@@ -117,6 +119,7 @@ static struct dentry *open_xa_root(struct super_block *sb, int flags)
 {
 	struct dentry *privroot = REISERFS_SB(sb)->priv_root;
 	struct dentry *xaroot;
+
 	if (!privroot->d_inode)
 		return ERR_PTR(-ENODATA);
 
@@ -127,6 +130,7 @@ static struct dentry *open_xa_root(struct super_block *sb, int flags)
 		xaroot = ERR_PTR(-ENODATA);
 	else if (!xaroot->d_inode) {
 		int err = -ENODATA;
+
 		if (xattr_may_create(flags))
 			err = xattr_mkdir(privroot->d_inode, xaroot, 0700);
 		if (err) {
@@ -157,6 +161,7 @@ static struct dentry *open_xa_dir(const struct inode *inode, int flags)
 	xadir = lookup_one_len(namebuf, xaroot, strlen(namebuf));
 	if (!IS_ERR(xadir) && !xadir->d_inode) {
 		int err = -ENODATA;
+
 		if (xattr_may_create(flags))
 			err = xattr_mkdir(xaroot->d_inode, xadir, 0700);
 		if (err) {
@@ -188,6 +193,7 @@ fill_with_dentries(void *buf, const char *name, int namelen, loff_t offset,
 {
 	struct reiserfs_dentry_buf *dbuf = buf;
 	struct dentry *dentry;
+
 	WARN_ON_ONCE(!mutex_is_locked(&dbuf->xadir->d_inode->i_mutex));
 
 	if (dbuf->count == ARRAY_SIZE(dbuf->dentries))
@@ -218,6 +224,7 @@ static void
 cleanup_dentry_buf(struct reiserfs_dentry_buf *buf)
 {
 	int i;
+
 	for (i = 0; i < buf->count; i++)
 		if (buf->dentries[i])
 			dput(buf->dentries[i]);
@@ -283,11 +290,13 @@ static int reiserfs_for_each_xattr(struct inode *inode,
 		int blocks = JOURNAL_PER_BALANCE_CNT * 2 + 2 +
 			     4 * REISERFS_QUOTA_TRANS_BLOCKS(inode->i_sb);
 		struct reiserfs_transaction_handle th;
+
 		reiserfs_write_lock(inode->i_sb);
 		err = journal_begin(&th, inode->i_sb, blocks);
 		reiserfs_write_unlock(inode->i_sb);
 		if (!err) {
 			int jerror;
+
 			mutex_lock_nested(&dir->d_parent->d_inode->i_mutex,
 					  I_MUTEX_XATTR);
 			err = action(dir, data);
@@ -340,6 +349,7 @@ static int chown_one_xattr(struct dentry *dentry, void *data)
 int reiserfs_delete_xattrs(struct inode *inode)
 {
 	int err = reiserfs_for_each_xattr(inode, delete_one_xattr, NULL);
+
 	if (err)
 		reiserfs_warning(inode->i_sb, "jdm-20004",
 				 "Couldn't delete all xattrs (%d)\n", err);
@@ -350,6 +360,7 @@ int reiserfs_delete_xattrs(struct inode *inode)
 int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)
 {
 	int err = reiserfs_for_each_xattr(inode, chown_one_xattr, attrs);
+
 	if (err)
 		reiserfs_warning(inode->i_sb, "jdm-20007",
 				 "Couldn't chown all xattrs (%d)\n", err);
@@ -439,6 +450,7 @@ int reiserfs_commit_write(struct file *f, struct page *page,
 static void update_ctime(struct inode *inode)
 {
 	struct timespec now = current_fs_time(inode->i_sb);
+
 	if (inode_unhashed(inode) || !inode->i_nlink ||
 	    timespec_equal(&inode->i_ctime, &now))
 		return;
@@ -514,6 +526,7 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th,
 		size_t chunk;
 		size_t skip = 0;
 		size_t page_offset = (file_pos & (PAGE_CACHE_SIZE - 1));
+
 		if (buffer_size - buffer_pos > PAGE_CACHE_SIZE)
 			chunk = PAGE_CACHE_SIZE;
 		else
@@ -530,6 +543,7 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th,
 
 		if (file_pos == 0) {
 			struct reiserfs_xattr_header *rxh;
+
 			skip = file_pos = sizeof(struct reiserfs_xattr_header);
 			if (chunk + skip > PAGE_CACHE_SIZE)
 				chunk = PAGE_CACHE_SIZE - skip;
@@ -659,6 +673,7 @@ reiserfs_xattr_get(struct inode *inode, const char *name, void *buffer,
 		size_t chunk;
 		char *data;
 		size_t skip = 0;
+
 		if (isize - file_pos > PAGE_CACHE_SIZE)
 			chunk = PAGE_CACHE_SIZE;
 		else
@@ -792,6 +807,7 @@ reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
 int reiserfs_removexattr(struct dentry *dentry, const char *name)
 {
 	const struct xattr_handler *handler;
+
 	handler = find_xattr_handler_prefix(dentry->d_sb->s_xattr, name);
 
 	if (!handler || get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
@@ -813,9 +829,11 @@ static int listxattr_filler(void *buf, const char *name, int namelen,
 {
 	struct listxattr_buf *b = (struct listxattr_buf *)buf;
 	size_t size;
+
 	if (name[0] != '.' ||
 	    (namelen != 1 && (name[1] != '.' || namelen != 2))) {
 		const struct xattr_handler *handler;
+
 		handler = find_xattr_handler_prefix(b->dentry->d_sb->s_xattr,
 						    name);
 		if (!handler)	/* Unsupported xattr name */
@@ -885,6 +903,7 @@ static int create_privroot(struct dentry *dentry)
 {
 	int err;
 	struct inode *inode = dentry->d_parent->d_inode;
+
 	WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex));
 
 	err = xattr_mkdir(inode, dentry, 0700);
@@ -1015,6 +1034,7 @@ int reiserfs_xattr_init(struct super_block *s, int mount_flags)
 		mutex_lock(&privroot->d_inode->i_mutex);
 		if (!REISERFS_SB(s)->xattr_root) {
 			struct dentry *dentry;
+
 			dentry = lookup_one_len(XAROOT_NAME, privroot,
 						strlen(XAROOT_NAME));
 			if (!IS_ERR(dentry))
diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
index 44503e293790..4b34b9dc03dd 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -9,7 +9,7 @@
 #include <linux/posix_acl_xattr.h>
 #include "xattr.h"
 #include "acl.h"
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 static int __reiserfs_set_acl(struct reiserfs_transaction_handle *th,
 			    struct inode *inode, int type,
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
index 800a3cef6f62..e7f8939a4cb5 100644
--- a/fs/reiserfs/xattr_security.c
+++ b/fs/reiserfs/xattr_security.c
@@ -6,7 +6,7 @@
 #include <linux/slab.h>
 #include "xattr.h"
 #include <linux/security.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 static int
 security_get(struct dentry *dentry, const char *name, void *buffer, size_t size,
diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c
index a0035719f66b..5eeb0c48ba46 100644
--- a/fs/reiserfs/xattr_trusted.c
+++ b/fs/reiserfs/xattr_trusted.c
@@ -5,7 +5,7 @@
 #include <linux/pagemap.h>
 #include <linux/xattr.h>
 #include "xattr.h"
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 static int
 trusted_get(struct dentry *dentry, const char *name, void *buffer, size_t size,
diff --git a/fs/reiserfs/xattr_user.c b/fs/reiserfs/xattr_user.c
index 8667491ae7c3..e50eab046471 100644
--- a/fs/reiserfs/xattr_user.c
+++ b/fs/reiserfs/xattr_user.c
@@ -4,7 +4,7 @@
 #include <linux/pagemap.h>
 #include <linux/xattr.h>
 #include "xattr.h"
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 static int
 user_get(struct dentry *dentry, const char *name, void *buffer, size_t size,
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index ef90e8bca95a..e98dd88197d5 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -56,6 +56,8 @@
  * 2 of the Licence, or (at your option) any later version.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/string.h>
 #include <linux/fs.h>
@@ -380,7 +382,7 @@ static struct inode *romfs_iget(struct super_block *sb, unsigned long pos)
 eio:
 	ret = -EIO;
 error:
-	printk(KERN_ERR "ROMFS: read error for inode 0x%lx\n", pos);
+	pr_err("read error for inode 0x%lx\n", pos);
 	return ERR_PTR(ret);
 }
 
@@ -390,6 +392,7 @@ error:
 static struct inode *romfs_alloc_inode(struct super_block *sb)
 {
 	struct romfs_inode_info *inode;
+
 	inode = kmem_cache_alloc(romfs_inode_cachep, GFP_KERNEL);
 	return inode ? &inode->vfs_inode : NULL;
 }
@@ -400,6 +403,7 @@ static struct inode *romfs_alloc_inode(struct super_block *sb)
 static void romfs_i_callback(struct rcu_head *head)
 {
 	struct inode *inode = container_of(head, struct inode, i_rcu);
+
 	kmem_cache_free(romfs_inode_cachep, ROMFS_I(inode));
 }
 
@@ -507,15 +511,13 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
 	if (rsb->word0 != ROMSB_WORD0 || rsb->word1 != ROMSB_WORD1 ||
 	    img_size < ROMFH_SIZE) {
 		if (!silent)
-			printk(KERN_WARNING "VFS:"
-			       " Can't find a romfs filesystem on dev %s.\n",
+			pr_warn("VFS: Can't find a romfs filesystem on dev %s.\n",
 			       sb->s_id);
 		goto error_rsb_inval;
 	}
 
 	if (romfs_checksum(rsb, min_t(size_t, img_size, 512))) {
-		printk(KERN_ERR "ROMFS: bad initial checksum on dev %s.\n",
-		       sb->s_id);
+		pr_err("bad initial checksum on dev %s.\n", sb->s_id);
 		goto error_rsb_inval;
 	}
 
@@ -523,8 +525,8 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
 
 	len = strnlen(rsb->name, ROMFS_MAXFN);
 	if (!silent)
-		printk(KERN_NOTICE "ROMFS: Mounting image '%*.*s' through %s\n",
-		       (unsigned) len, (unsigned) len, rsb->name, storage);
+		pr_notice("Mounting image '%*.*s' through %s\n",
+			  (unsigned) len, (unsigned) len, rsb->name, storage);
 
 	kfree(rsb);
 	rsb = NULL;
@@ -614,7 +616,7 @@ static int __init init_romfs_fs(void)
 {
 	int ret;
 
-	printk(KERN_INFO "ROMFS MTD (C) 2007 Red Hat, Inc.\n");
+	pr_info("ROMFS MTD (C) 2007 Red Hat, Inc.\n");
 
 	romfs_inode_cachep =
 		kmem_cache_create("romfs_i",
@@ -623,13 +625,12 @@ static int __init init_romfs_fs(void)
 				  romfs_i_init_once);
 
 	if (!romfs_inode_cachep) {
-		printk(KERN_ERR
-		       "ROMFS error: Failed to initialise inode cache\n");
+		pr_err("Failed to initialise inode cache\n");
 		return -ENOMEM;
 	}
 	ret = register_filesystem(&romfs_fs_type);
 	if (ret) {
-		printk(KERN_ERR "ROMFS error: Failed to register filesystem\n");
+		pr_err("Failed to register filesystem\n");
 		goto error_register;
 	}
 	return 0;
diff --git a/fs/ufs/Makefile b/fs/ufs/Makefile
index dd39980437fc..4d0e02b022b3 100644
--- a/fs/ufs/Makefile
+++ b/fs/ufs/Makefile
@@ -6,3 +6,4 @@ obj-$(CONFIG_UFS_FS) += ufs.o
 
 ufs-objs := balloc.o cylinder.o dir.o file.o ialloc.o inode.o \
 	    namei.o super.o symlink.o truncate.o util.o
+ccflags-$(CONFIG_UFS_DEBUG)    += -DDEBUG
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 61e8a9b021dd..7c580c97990e 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -158,16 +158,16 @@ out:
 
 /**
  * ufs_inode_getfrag() - allocate new fragment(s)
- * @inode - pointer to inode
- * @fragment - number of `fragment' which hold pointer
+ * @inode: pointer to inode
+ * @fragment: number of `fragment' which hold pointer
  *   to new allocated fragment(s)
- * @new_fragment - number of new allocated fragment(s)
- * @required - how many fragment(s) we require
- * @err - we set it if something wrong
- * @phys - pointer to where we save physical number of new allocated fragments,
+ * @new_fragment: number of new allocated fragment(s)
+ * @required: how many fragment(s) we require
+ * @err: we set it if something wrong
+ * @phys: pointer to where we save physical number of new allocated fragments,
  *   NULL if we allocate not data(indirect blocks for example).
- * @new - we set it if we allocate new block
- * @locked_page - for ufs_new_fragments()
+ * @new: we set it if we allocate new block
+ * @locked_page: for ufs_new_fragments()
  */
 static struct buffer_head *
 ufs_inode_getfrag(struct inode *inode, u64 fragment,
@@ -315,16 +315,16 @@ repeat2:
 
 /**
  * ufs_inode_getblock() - allocate new block
- * @inode - pointer to inode
- * @bh - pointer to block which hold "pointer" to new allocated block
- * @fragment - number of `fragment' which hold pointer
+ * @inode: pointer to inode
+ * @bh: pointer to block which hold "pointer" to new allocated block
+ * @fragment: number of `fragment' which hold pointer
  *   to new allocated block
- * @new_fragment - number of new allocated fragment
+ * @new_fragment: number of new allocated fragment
  *  (block will hold this fragment and also uspi->s_fpb-1)
- * @err - see ufs_inode_getfrag()
- * @phys - see ufs_inode_getfrag()
- * @new - see ufs_inode_getfrag()
- * @locked_page - see ufs_inode_getfrag()
+ * @err: see ufs_inode_getfrag()
+ * @phys: see ufs_inode_getfrag()
+ * @new: see ufs_inode_getfrag()
+ * @locked_page: see ufs_inode_getfrag()
  */
 static struct buffer_head *
 ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index b879f1ba3439..da73801301d5 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -65,7 +65,6 @@
  * Evgeniy Dushistov <dushistov@mail.ru>, 2007
  */
 
-
 #include <linux/exportfs.h>
 #include <linux/module.h>
 #include <linux/bitops.h>
@@ -172,73 +171,73 @@ static void ufs_print_super_stuff(struct super_block *sb,
 {
 	u32 magic = fs32_to_cpu(sb, usb3->fs_magic);
 
-	printk("ufs_print_super_stuff\n");
-	printk("  magic:     0x%x\n", magic);
+	pr_debug("ufs_print_super_stuff\n");
+	pr_debug("  magic:     0x%x\n", magic);
 	if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
-		printk("  fs_size:   %llu\n", (unsigned long long)
-		       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
-		printk("  fs_dsize:  %llu\n", (unsigned long long)
-		       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
-		printk("  bsize:         %u\n",
-		       fs32_to_cpu(sb, usb1->fs_bsize));
-		printk("  fsize:         %u\n",
-		       fs32_to_cpu(sb, usb1->fs_fsize));
-		printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
-		printk("  fs_sblockloc: %llu\n", (unsigned long long)
-		       fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
-		printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
-		       fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
-		printk("  cs_nbfree(No of free blocks):  %llu\n",
-		       (unsigned long long)
-		       fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
-		printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
-		       (unsigned long long)
-		       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
-		printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
-		       (unsigned long long)
-		       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
-		printk(KERN_INFO"  fs_maxsymlinklen: %u\n",
-		       fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
+		pr_debug("  fs_size:   %llu\n", (unsigned long long)
+			 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
+		pr_debug("  fs_dsize:  %llu\n", (unsigned long long)
+			 fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
+		pr_debug("  bsize:         %u\n",
+			 fs32_to_cpu(sb, usb1->fs_bsize));
+		pr_debug("  fsize:         %u\n",
+			 fs32_to_cpu(sb, usb1->fs_fsize));
+		pr_debug("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
+		pr_debug("  fs_sblockloc: %llu\n", (unsigned long long)
+			 fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
+		pr_debug("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
+			 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
+		pr_debug("  cs_nbfree(No of free blocks):  %llu\n",
+			 (unsigned long long)
+			 fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
+		pr_info("  cs_nifree(Num of free inodes): %llu\n",
+			(unsigned long long)
+			fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
+		pr_info("  cs_nffree(Num of free frags): %llu\n",
+			(unsigned long long)
+			fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
+		pr_info("  fs_maxsymlinklen: %u\n",
+			fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen));
 	} else {
-		printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
-		printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
-		printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
-		printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
-		printk(" cgoffset:    %u\n",
-		       fs32_to_cpu(sb, usb1->fs_cgoffset));
-		printk(" ~cgmask:     0x%x\n",
-		       ~fs32_to_cpu(sb, usb1->fs_cgmask));
-		printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
-		printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
-		printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
-		printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
-		printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
-		printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
-		printk(" fragshift:   %u\n",
-		       fs32_to_cpu(sb, usb1->fs_fragshift));
-		printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
-		printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
-		printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
-		printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
-		printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
-		printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
-		printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
-		printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
-		printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
-		printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
-		printk(" fstodb:      %u\n",
-		       fs32_to_cpu(sb, usb1->fs_fsbtodb));
-		printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
-		printk(" ndir         %u\n",
-		       fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
-		printk(" nifree       %u\n",
-		       fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
-		printk(" nbfree       %u\n",
-		       fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
-		printk(" nffree       %u\n",
-		       fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
+		pr_debug(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
+		pr_debug(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
+		pr_debug(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
+		pr_debug(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
+		pr_debug(" cgoffset:    %u\n",
+			 fs32_to_cpu(sb, usb1->fs_cgoffset));
+		pr_debug(" ~cgmask:     0x%x\n",
+			 ~fs32_to_cpu(sb, usb1->fs_cgmask));
+		pr_debug(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
+		pr_debug(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
+		pr_debug(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
+		pr_debug(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
+		pr_debug(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
+		pr_debug(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
+		pr_debug(" fragshift:   %u\n",
+			 fs32_to_cpu(sb, usb1->fs_fragshift));
+		pr_debug(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
+		pr_debug(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
+		pr_debug(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
+		pr_debug(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
+		pr_debug(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
+		pr_debug(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
+		pr_debug(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
+		pr_debug(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
+		pr_debug(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
+		pr_debug(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
+		pr_debug(" fstodb:      %u\n",
+			 fs32_to_cpu(sb, usb1->fs_fsbtodb));
+		pr_debug(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
+		pr_debug(" ndir         %u\n",
+			 fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
+		pr_debug(" nifree       %u\n",
+			 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
+		pr_debug(" nbfree       %u\n",
+			 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
+		pr_debug(" nffree       %u\n",
+			 fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
 	}
-	printk("\n");
+	pr_debug("\n");
 }
 
 /*
@@ -247,38 +246,38 @@ static void ufs_print_super_stuff(struct super_block *sb,
 static void ufs_print_cylinder_stuff(struct super_block *sb,
 				     struct ufs_cylinder_group *cg)
 {
-	printk("\nufs_print_cylinder_stuff\n");
-	printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
-	printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
-	printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
-	printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
-	printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
-	printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
-	printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
-	printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
-	printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
-	printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
-	printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
-	printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
-	printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
-	printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
-	printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
+	pr_debug("\nufs_print_cylinder_stuff\n");
+	pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
+	pr_debug("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
+	pr_debug("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
+	pr_debug("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
+	pr_debug("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
+	pr_debug("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
+	pr_debug("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
+	pr_debug("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
+	pr_debug("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
+	pr_debug("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
+	pr_debug("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
+	pr_debug("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
+	pr_debug("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
+	pr_debug("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
+	pr_debug("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
 	    fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
 	    fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
 	    fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
 	    fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
-	printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
-	printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
-	printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
-	printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
-	printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
-	printk("  clustersumoff %u\n",
-	       fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
-	printk("  clusteroff    %u\n",
-	       fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
-	printk("  nclusterblks  %u\n",
-	       fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
-	printk("\n");
+	pr_debug("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
+	pr_debug("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
+	pr_debug("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
+	pr_debug("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
+	pr_debug("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
+	pr_debug("  clustersumoff %u\n",
+		 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
+	pr_debug("  clusteroff    %u\n",
+		 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
+	pr_debug("  nclusterblks  %u\n",
+		 fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
+	pr_debug("\n");
 }
 #else
 #  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
@@ -287,13 +286,12 @@ static void ufs_print_cylinder_stuff(struct super_block *sb,
 
 static const struct super_operations ufs_super_ops;
 
-static char error_buf[1024];
-
 void ufs_error (struct super_block * sb, const char * function,
 	const char * fmt, ...)
 {
 	struct ufs_sb_private_info * uspi;
 	struct ufs_super_block_first * usb1;
+	struct va_format vaf;
 	va_list args;
 
 	uspi = UFS_SB(sb)->s_uspi;
@@ -305,20 +303,21 @@ void ufs_error (struct super_block * sb, const char * function,
 		ufs_mark_sb_dirty(sb);
 		sb->s_flags |= MS_RDONLY;
 	}
-	va_start (args, fmt);
-	vsnprintf (error_buf, sizeof(error_buf), fmt, args);
-	va_end (args);
+	va_start(args, fmt);
+	vaf.fmt = fmt;
+	vaf.va = &args;
 	switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
 	case UFS_MOUNT_ONERROR_PANIC:
-		panic ("UFS-fs panic (device %s): %s: %s\n", 
-			sb->s_id, function, error_buf);
+		panic("panic (device %s): %s: %pV\n",
+		      sb->s_id, function, &vaf);
 
 	case UFS_MOUNT_ONERROR_LOCK:
 	case UFS_MOUNT_ONERROR_UMOUNT:
 	case UFS_MOUNT_ONERROR_REPAIR:
-		printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
-			sb->s_id, function, error_buf);
-	}		
+		pr_crit("error (device %s): %s: %pV\n",
+			sb->s_id, function, &vaf);
+	}
+	va_end(args);
 }
 
 void ufs_panic (struct super_block * sb, const char * function,
@@ -326,6 +325,7 @@ void ufs_panic (struct super_block * sb, const char * function,
 {
 	struct ufs_sb_private_info * uspi;
 	struct ufs_super_block_first * usb1;
+	struct va_format vaf;
 	va_list args;
 	
 	uspi = UFS_SB(sb)->s_uspi;
@@ -336,24 +336,27 @@ void ufs_panic (struct super_block * sb, const char * function,
 		ubh_mark_buffer_dirty(USPI_UBH(uspi));
 		ufs_mark_sb_dirty(sb);
 	}
-	va_start (args, fmt);
-	vsnprintf (error_buf, sizeof(error_buf), fmt, args);
-	va_end (args);
+	va_start(args, fmt);
+	vaf.fmt = fmt;
+	vaf.va = &args;
 	sb->s_flags |= MS_RDONLY;
-	printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
-		sb->s_id, function, error_buf);
+	pr_crit("panic (device %s): %s: %pV\n",
+		sb->s_id, function, &vaf);
+	va_end(args);
 }
 
 void ufs_warning (struct super_block * sb, const char * function,
 	const char * fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
-	va_start (args, fmt);
-	vsnprintf (error_buf, sizeof(error_buf), fmt, args);
-	va_end (args);
-	printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
-		sb->s_id, function, error_buf);
+	va_start(args, fmt);
+	vaf.fmt = fmt;
+	vaf.va = &args;
+	pr_warn("(device %s): %s: %pV\n",
+		sb->s_id, function, &vaf);
+	va_end(args);
 }
 
 enum {
@@ -464,14 +467,12 @@ static int ufs_parse_options (char * options, unsigned * mount_options)
 			ufs_set_opt (*mount_options, ONERROR_UMOUNT);
 			break;
 		case Opt_onerror_repair:
-			printk("UFS-fs: Unable to do repair on error, "
-				"will lock lock instead\n");
+			pr_err("Unable to do repair on error, will lock lock instead\n");
 			ufs_clear_opt (*mount_options, ONERROR);
 			ufs_set_opt (*mount_options, ONERROR_REPAIR);
 			break;
 		default:
-			printk("UFS-fs: Invalid option: \"%s\" "
-					"or missing value\n", p);
+			pr_err("Invalid option: \"%s\" or missing value\n", p);
 			return 0;
 		}
 	}
@@ -788,8 +789,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 
 #ifndef CONFIG_UFS_FS_WRITE
 	if (!(sb->s_flags & MS_RDONLY)) {
-		printk("ufs was compiled with read-only support, "
-		       "can't be mounted as read-write\n");
+		pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
 		return -EROFS;
 	}
 #endif
@@ -812,12 +812,12 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 	sbi->s_mount_opt = 0;
 	ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
 	if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
-		printk("wrong mount options\n");
+		pr_err("wrong mount options\n");
 		goto failed;
 	}
 	if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
 		if (!silent)
-			printk("You didn't specify the type of your ufs filesystem\n\n"
+			pr_err("You didn't specify the type of your ufs filesystem\n\n"
 			"mount -t ufs -o ufstype="
 			"sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
 			">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
@@ -868,7 +868,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 		break;
 
 	case UFS_MOUNT_UFSTYPE_SUNOS:
-		UFSD(("ufstype=sunos\n"))
+		UFSD("ufstype=sunos\n");
 		uspi->s_fsize = block_size = 1024;
 		uspi->s_fmask = ~(1024 - 1);
 		uspi->s_fshift = 10;
@@ -900,7 +900,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 		if (!(sb->s_flags & MS_RDONLY)) {
 			if (!silent)
-				printk(KERN_INFO "ufstype=old is supported read-only\n");
+				pr_info("ufstype=old is supported read-only\n");
 			sb->s_flags |= MS_RDONLY;
 		}
 		break;
@@ -916,7 +916,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 		if (!(sb->s_flags & MS_RDONLY)) {
 			if (!silent)
-				printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
+				pr_info("ufstype=nextstep is supported read-only\n");
 			sb->s_flags |= MS_RDONLY;
 		}
 		break;
@@ -932,7 +932,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 		if (!(sb->s_flags & MS_RDONLY)) {
 			if (!silent)
-				printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
+				pr_info("ufstype=nextstep-cd is supported read-only\n");
 			sb->s_flags |= MS_RDONLY;
 		}
 		break;
@@ -948,7 +948,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 		flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 		if (!(sb->s_flags & MS_RDONLY)) {
 			if (!silent)
-				printk(KERN_INFO "ufstype=openstep is supported read-only\n");
+				pr_info("ufstype=openstep is supported read-only\n");
 			sb->s_flags |= MS_RDONLY;
 		}
 		break;
@@ -963,19 +963,19 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
 		if (!(sb->s_flags & MS_RDONLY)) {
 			if (!silent)
-				printk(KERN_INFO "ufstype=hp is supported read-only\n");
+				pr_info("ufstype=hp is supported read-only\n");
 			sb->s_flags |= MS_RDONLY;
  		}
  		break;
 	default:
 		if (!silent)
-			printk("unknown ufstype\n");
+			pr_err("unknown ufstype\n");
 		goto failed;
 	}
 	
 again:	
 	if (!sb_set_blocksize(sb, block_size)) {
-		printk(KERN_ERR "UFS: failed to set blocksize\n");
+		pr_err("failed to set blocksize\n");
 		goto failed;
 	}
 
@@ -1034,7 +1034,7 @@ again:
 		goto again;
 	}
 	if (!silent)
-		printk("ufs_read_super: bad magic number\n");
+		pr_err("%s(): bad magic number\n", __func__);
 	goto failed;
 
 magic_found:
@@ -1048,33 +1048,33 @@ magic_found:
 	uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 
 	if (!is_power_of_2(uspi->s_fsize)) {
-		printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
-			uspi->s_fsize);
-			goto failed;
+		pr_err("%s(): fragment size %u is not a power of 2\n",
+		       __func__, uspi->s_fsize);
+		goto failed;
 	}
 	if (uspi->s_fsize < 512) {
-		printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
-			uspi->s_fsize);
+		pr_err("%s(): fragment size %u is too small\n",
+		       __func__, uspi->s_fsize);
 		goto failed;
 	}
 	if (uspi->s_fsize > 4096) {
-		printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
-			uspi->s_fsize);
+		pr_err("%s(): fragment size %u is too large\n",
+		       __func__, uspi->s_fsize);
 		goto failed;
 	}
 	if (!is_power_of_2(uspi->s_bsize)) {
-		printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
-			uspi->s_bsize);
+		pr_err("%s(): block size %u is not a power of 2\n",
+		       __func__, uspi->s_bsize);
 		goto failed;
 	}
 	if (uspi->s_bsize < 4096) {
-		printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
-			uspi->s_bsize);
+		pr_err("%s(): block size %u is too small\n",
+		       __func__, uspi->s_bsize);
 		goto failed;
 	}
 	if (uspi->s_bsize / uspi->s_fsize > 8) {
-		printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
-			uspi->s_bsize / uspi->s_fsize);
+		pr_err("%s(): too many fragments per block (%u)\n",
+		       __func__, uspi->s_bsize / uspi->s_fsize);
 		goto failed;
 	}
 	if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
@@ -1113,20 +1113,21 @@ magic_found:
 			UFSD("fs is DEC OSF/1\n");
 			break;
 		case UFS_FSACTIVE:
-			printk("ufs_read_super: fs is active\n");
+			pr_err("%s(): fs is active\n", __func__);
 			sb->s_flags |= MS_RDONLY;
 			break;
 		case UFS_FSBAD:
-			printk("ufs_read_super: fs is bad\n");
+			pr_err("%s(): fs is bad\n", __func__);
 			sb->s_flags |= MS_RDONLY;
 			break;
 		default:
-			printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
+			pr_err("%s(): can't grok fs_clean 0x%x\n",
+			       __func__, usb1->fs_clean);
 			sb->s_flags |= MS_RDONLY;
 			break;
 		}
 	} else {
-		printk("ufs_read_super: fs needs fsck\n");
+		pr_err("%s(): fs needs fsck\n", __func__);
 		sb->s_flags |= MS_RDONLY;
 	}
 
@@ -1299,7 +1300,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 	if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
 		new_mount_opt |= ufstype;
 	} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
-		printk("ufstype can't be changed during remount\n");
+		pr_err("ufstype can't be changed during remount\n");
 		unlock_ufs(sb);
 		return -EINVAL;
 	}
@@ -1328,8 +1329,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 	 * fs was mounted as ro, remounting rw
 	 */
 #ifndef CONFIG_UFS_FS_WRITE
-		printk("ufs was compiled with read-only support, "
-		"can't be mounted as read-write\n");
+		pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
 		unlock_ufs(sb);
 		return -EINVAL;
 #else
@@ -1338,12 +1338,12 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 		    ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
 		    ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
 		    ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
-			printk("this ufstype is read-only supported\n");
+			pr_err("this ufstype is read-only supported\n");
 			unlock_ufs(sb);
 			return -EINVAL;
 		}
 		if (!ufs_read_cylinder_structures(sb)) {
-			printk("failed during remounting\n");
+			pr_err("failed during remounting\n");
 			unlock_ufs(sb);
 			return -EPERM;
 		}
diff --git a/fs/ufs/ufs.h b/fs/ufs/ufs.h
index 343e6fc571e5..2a07396d5f9e 100644
--- a/fs/ufs/ufs.h
+++ b/fs/ufs/ufs.h
@@ -1,6 +1,12 @@
 #ifndef _UFS_UFS_H
 #define _UFS_UFS_H 1
 
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #define UFS_MAX_GROUP_LOADED 8
 #define UFS_CGNO_EMPTY ((unsigned)-1)
 
@@ -71,9 +77,9 @@ struct ufs_inode_info {
  */
 #ifdef CONFIG_UFS_DEBUG
 #	define UFSD(f, a...)	{					\
-		printk ("UFSD (%s, %d): %s:",				\
+		pr_debug("UFSD (%s, %d): %s:",				\
 			__FILE__, __LINE__, __func__);		\
-		printk (f, ## a);					\
+		pr_debug(f, ## a);					\
 	}
 #else
 #	define UFSD(f, a...)	/**/
diff --git a/include/asm-generic/pci-dma-compat.h b/include/asm-generic/pci-dma-compat.h
index 1437b7da09b2..c110843fc53b 100644
--- a/include/asm-generic/pci-dma-compat.h
+++ b/include/asm-generic/pci-dma-compat.h
@@ -19,6 +19,14 @@ pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
 	return dma_alloc_coherent(hwdev == NULL ? NULL : &hwdev->dev, size, dma_handle, GFP_ATOMIC);
 }
 
+static inline void *
+pci_zalloc_consistent(struct pci_dev *hwdev, size_t size,
+		      dma_addr_t *dma_handle)
+{
+	return dma_zalloc_coherent(hwdev == NULL ? NULL : &hwdev->dev,
+				   size, dma_handle, GFP_ATOMIC);
+}
+
 static inline void
 pci_free_consistent(struct pci_dev *hwdev, size_t size,
 		    void *vaddr, dma_addr_t dma_handle)
diff --git a/include/linux/decompress/bunzip2.h b/include/linux/decompress/bunzip2.h
index 115272137a9c..4d683df898e6 100644
--- a/include/linux/decompress/bunzip2.h
+++ b/include/linux/decompress/bunzip2.h
@@ -1,10 +1,10 @@
 #ifndef DECOMPRESS_BUNZIP2_H
 #define DECOMPRESS_BUNZIP2_H
 
-int bunzip2(unsigned char *inbuf, int len,
-	    int(*fill)(void*, unsigned int),
-	    int(*flush)(void*, unsigned int),
+int bunzip2(unsigned char *inbuf, long len,
+	    long (*fill)(void*, unsigned long),
+	    long (*flush)(void*, unsigned long),
 	    unsigned char *output,
-	    int *pos,
+	    long *pos,
 	    void(*error)(char *x));
 #endif
diff --git a/include/linux/decompress/generic.h b/include/linux/decompress/generic.h
index 0c7111a55a1a..1fcfd64b5076 100644
--- a/include/linux/decompress/generic.h
+++ b/include/linux/decompress/generic.h
@@ -1,11 +1,11 @@
 #ifndef DECOMPRESS_GENERIC_H
 #define DECOMPRESS_GENERIC_H
 
-typedef int (*decompress_fn) (unsigned char *inbuf, int len,
-			      int(*fill)(void*, unsigned int),
-			      int(*flush)(void*, unsigned int),
+typedef int (*decompress_fn) (unsigned char *inbuf, long len,
+			      long (*fill)(void*, unsigned long),
+			      long (*flush)(void*, unsigned long),
 			      unsigned char *outbuf,
-			      int *posp,
+			      long *posp,
 			      void(*error)(char *x));
 
 /* inbuf   - input buffer
@@ -33,7 +33,7 @@ typedef int (*decompress_fn) (unsigned char *inbuf, int len,
 
 
 /* Utility routine to detect the decompression method */
-decompress_fn decompress_method(const unsigned char *inbuf, int len,
+decompress_fn decompress_method(const unsigned char *inbuf, long len,
 				const char **name);
 
 #endif
diff --git a/include/linux/decompress/inflate.h b/include/linux/decompress/inflate.h
index 1d0aedef9822..e4f411fdbd24 100644
--- a/include/linux/decompress/inflate.h
+++ b/include/linux/decompress/inflate.h
@@ -1,10 +1,10 @@
 #ifndef LINUX_DECOMPRESS_INFLATE_H
 #define LINUX_DECOMPRESS_INFLATE_H
 
-int gunzip(unsigned char *inbuf, int len,
-	   int(*fill)(void*, unsigned int),
-	   int(*flush)(void*, unsigned int),
+int gunzip(unsigned char *inbuf, long len,
+	   long (*fill)(void*, unsigned long),
+	   long (*flush)(void*, unsigned long),
 	   unsigned char *output,
-	   int *pos,
+	   long *pos,
 	   void(*error_fn)(char *x));
 #endif
diff --git a/include/linux/decompress/unlz4.h b/include/linux/decompress/unlz4.h
index d5b68bf3ec92..3273c2f36496 100644
--- a/include/linux/decompress/unlz4.h
+++ b/include/linux/decompress/unlz4.h
@@ -1,10 +1,10 @@
 #ifndef DECOMPRESS_UNLZ4_H
 #define DECOMPRESS_UNLZ4_H
 
-int unlz4(unsigned char *inbuf, int len,
-	int(*fill)(void*, unsigned int),
-	int(*flush)(void*, unsigned int),
+int unlz4(unsigned char *inbuf, long len,
+	long (*fill)(void*, unsigned long),
+	long (*flush)(void*, unsigned long),
 	unsigned char *output,
-	int *pos,
+	long *pos,
 	void(*error)(char *x));
 #endif
diff --git a/include/linux/decompress/unlzma.h b/include/linux/decompress/unlzma.h
index 7796538f1bf4..8a891a193840 100644
--- a/include/linux/decompress/unlzma.h
+++ b/include/linux/decompress/unlzma.h
@@ -1,11 +1,11 @@
 #ifndef DECOMPRESS_UNLZMA_H
 #define DECOMPRESS_UNLZMA_H
 
-int unlzma(unsigned char *, int,
-	   int(*fill)(void*, unsigned int),
-	   int(*flush)(void*, unsigned int),
+int unlzma(unsigned char *, long,
+	   long (*fill)(void*, unsigned long),
+	   long (*flush)(void*, unsigned long),
 	   unsigned char *output,
-	   int *posp,
+	   long *posp,
 	   void(*error)(char *x)
 	);
 
diff --git a/include/linux/decompress/unlzo.h b/include/linux/decompress/unlzo.h
index 987229752519..af18f95d6570 100644
--- a/include/linux/decompress/unlzo.h
+++ b/include/linux/decompress/unlzo.h
@@ -1,10 +1,10 @@
 #ifndef DECOMPRESS_UNLZO_H
 #define DECOMPRESS_UNLZO_H
 
-int unlzo(unsigned char *inbuf, int len,
-	int(*fill)(void*, unsigned int),
-	int(*flush)(void*, unsigned int),
+int unlzo(unsigned char *inbuf, long len,
+	long (*fill)(void*, unsigned long),
+	long (*flush)(void*, unsigned long),
 	unsigned char *output,
-	int *pos,
+	long *pos,
 	void(*error)(char *x));
 #endif
diff --git a/include/linux/decompress/unxz.h b/include/linux/decompress/unxz.h
index 41728fc6c8a1..f764e2a7201e 100644
--- a/include/linux/decompress/unxz.h
+++ b/include/linux/decompress/unxz.h
@@ -10,10 +10,10 @@
 #ifndef DECOMPRESS_UNXZ_H
 #define DECOMPRESS_UNXZ_H
 
-int unxz(unsigned char *in, int in_size,
-	 int (*fill)(void *dest, unsigned int size),
-	 int (*flush)(void *src, unsigned int size),
-	 unsigned char *out, int *in_used,
+int unxz(unsigned char *in, long in_size,
+	 long (*fill)(void *dest, unsigned long size),
+	 long (*flush)(void *src, unsigned long size),
+	 unsigned char *out, long *in_used,
 	 void (*error)(char *x));
 
 #endif
diff --git a/include/linux/efi.h b/include/linux/efi.h
index efc681fd5895..45cb4ffdea62 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -1156,6 +1156,9 @@ int efivars_sysfs_init(void);
 #ifdef CONFIG_EFI_RUNTIME_MAP
 int efi_runtime_map_init(struct kobject *);
 void efi_runtime_map_setup(void *, int, u32);
+int efi_get_runtime_map_size(void);
+int efi_get_runtime_map_desc_size(void);
+int efi_runtime_map_copy(void *buf, size_t bufsz);
 #else
 static inline int efi_runtime_map_init(struct kobject *kobj)
 {
@@ -1164,6 +1167,22 @@ static inline int efi_runtime_map_init(struct kobject *kobj)
 
 static inline void
 efi_runtime_map_setup(void *map, int nr_entries, u32 desc_size) {}
+
+static inline int efi_get_runtime_map_size(void)
+{
+	return 0;
+}
+
+static inline int efi_get_runtime_map_desc_size(void)
+{
+	return 0;
+}
+
+static inline int efi_runtime_map_copy(void *buf, size_t bufsz)
+{
+	return 0;
+}
+
 #endif
 
 /* prototypes shared between arch specific and generic stub code */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 1ab6c6913040..f0890e4a7c25 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -387,7 +387,7 @@ struct address_space {
 	struct inode		*host;		/* owner: inode, block_device */
 	struct radix_tree_root	page_tree;	/* radix tree of all pages */
 	spinlock_t		tree_lock;	/* and lock protecting it */
-	unsigned int		i_mmap_writable;/* count VM_SHARED mappings */
+	atomic_t		i_mmap_writable;/* count VM_SHARED mappings */
 	struct rb_root		i_mmap;		/* tree of private and shared mappings */
 	struct list_head	i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
 	struct mutex		i_mmap_mutex;	/* protect tree, count, list */
@@ -470,10 +470,35 @@ static inline int mapping_mapped(struct address_space *mapping)
  * Note that i_mmap_writable counts all VM_SHARED vmas: do_mmap_pgoff
  * marks vma as VM_SHARED if it is shared, and the file was opened for
  * writing i.e. vma may be mprotected writable even if now readonly.
+ *
+ * If i_mmap_writable is negative, no new writable mappings are allowed. You
+ * can only deny writable mappings, if none exists right now.
  */
 static inline int mapping_writably_mapped(struct address_space *mapping)
 {
-	return mapping->i_mmap_writable != 0;
+	return atomic_read(&mapping->i_mmap_writable) > 0;
+}
+
+static inline int mapping_map_writable(struct address_space *mapping)
+{
+	return atomic_inc_unless_negative(&mapping->i_mmap_writable) ?
+		0 : -EPERM;
+}
+
+static inline void mapping_unmap_writable(struct address_space *mapping)
+{
+	atomic_dec(&mapping->i_mmap_writable);
+}
+
+static inline int mapping_deny_writable(struct address_space *mapping)
+{
+	return atomic_dec_unless_positive(&mapping->i_mmap_writable) ?
+		0 : -EBUSY;
+}
+
+static inline void mapping_allow_writable(struct address_space *mapping)
+{
+	atomic_inc(&mapping->i_mmap_writable);
 }
 
 /*
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 5e3a906cc089..142ec544167c 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -237,6 +237,12 @@ extern int iomem_is_exclusive(u64 addr);
 extern int
 walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
 		void *arg, int (*func)(unsigned long, unsigned long, void *));
+extern int
+walk_system_ram_res(u64 start, u64 end, void *arg,
+		    int (*func)(u64, u64, void *));
+extern int
+walk_iomem_res(char *name, unsigned long flags, u64 start, u64 end, void *arg,
+	       int (*func)(u64, u64, void *));
 
 /* True if any part of r1 overlaps r2 */
 static inline bool resource_overlaps(struct resource *r1, struct resource *r2)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 3dc22abbc68a..31ae66f34235 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -470,6 +470,7 @@ extern enum system_states {
 #define TAINT_FIRMWARE_WORKAROUND	11
 #define TAINT_OOT_MODULE		12
 #define TAINT_UNSIGNED_MODULE		13
+#define TAINT_SOFTLOCKUP		14
 
 extern const char hex_asc[];
 #define hex_asc_lo(x)	hex_asc[((x) & 0x0f)]
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index a75641930049..4b2a0e11cc5b 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -10,6 +10,7 @@
 #include <linux/ioport.h>
 #include <linux/elfcore.h>
 #include <linux/elf.h>
+#include <linux/module.h>
 #include <asm/kexec.h>
 
 /* Verify architecture specific macros are defined */
@@ -69,7 +70,18 @@ typedef unsigned long kimage_entry_t;
 #define IND_SOURCE       0x8
 
 struct kexec_segment {
-	void __user *buf;
+	/*
+	 * This pointer can point to user memory if kexec_load() system
+	 * call is used or will point to kernel memory if
+	 * kexec_file_load() system call is used.
+	 *
+	 * Use ->buf when expecting to deal with user memory and use ->kbuf
+	 * when expecting to deal with kernel memory.
+	 */
+	union {
+		void __user *buf;
+		void *kbuf;
+	};
 	size_t bufsz;
 	unsigned long mem;
 	size_t memsz;
@@ -84,6 +96,27 @@ struct compat_kexec_segment {
 };
 #endif
 
+struct kexec_sha_region {
+	unsigned long start;
+	unsigned long len;
+};
+
+struct purgatory_info {
+	/* Pointer to elf header of read only purgatory */
+	Elf_Ehdr *ehdr;
+
+	/* Pointer to purgatory sechdrs which are modifiable */
+	Elf_Shdr *sechdrs;
+	/*
+	 * Temporary buffer location where purgatory is loaded and relocated
+	 * This memory can be freed post image load
+	 */
+	void *purgatory_buf;
+
+	/* Address where purgatory is finally loaded and is executed from */
+	unsigned long purgatory_load_addr;
+};
+
 struct kimage {
 	kimage_entry_t head;
 	kimage_entry_t *entry;
@@ -100,7 +133,7 @@ struct kimage {
 
 	struct list_head control_pages;
 	struct list_head dest_pages;
-	struct list_head unuseable_pages;
+	struct list_head unusable_pages;
 
 	/* Address of next control page to allocate for crash kernels. */
 	unsigned long control_page;
@@ -110,13 +143,63 @@ struct kimage {
 #define KEXEC_TYPE_DEFAULT 0
 #define KEXEC_TYPE_CRASH   1
 	unsigned int preserve_context : 1;
+	/* If set, we are using file mode kexec syscall */
+	unsigned int file_mode:1;
 
 #ifdef ARCH_HAS_KIMAGE_ARCH
 	struct kimage_arch arch;
 #endif
+
+	/* Additional fields for file based kexec syscall */
+	void *kernel_buf;
+	unsigned long kernel_buf_len;
+
+	void *initrd_buf;
+	unsigned long initrd_buf_len;
+
+	char *cmdline_buf;
+	unsigned long cmdline_buf_len;
+
+	/* File operations provided by image loader */
+	struct kexec_file_ops *fops;
+
+	/* Image loader handling the kernel can store a pointer here */
+	void *image_loader_data;
+
+	/* Information for loading purgatory */
+	struct purgatory_info purgatory_info;
 };
 
+/*
+ * Keeps track of buffer parameters as provided by caller for requesting
+ * memory placement of buffer.
+ */
+struct kexec_buf {
+	struct kimage *image;
+	char *buffer;
+	unsigned long bufsz;
+	unsigned long memsz;
+	unsigned long buf_align;
+	unsigned long buf_min;
+	unsigned long buf_max;
+	bool top_down;		/* allocate from top of memory hole */
+};
 
+typedef int (kexec_probe_t)(const char *kernel_buf, unsigned long kernel_size);
+typedef void *(kexec_load_t)(struct kimage *image, char *kernel_buf,
+			     unsigned long kernel_len, char *initrd,
+			     unsigned long initrd_len, char *cmdline,
+			     unsigned long cmdline_len);
+typedef int (kexec_cleanup_t)(void *loader_data);
+typedef int (kexec_verify_sig_t)(const char *kernel_buf,
+				 unsigned long kernel_len);
+
+struct kexec_file_ops {
+	kexec_probe_t *probe;
+	kexec_load_t *load;
+	kexec_cleanup_t *cleanup;
+	kexec_verify_sig_t *verify_sig;
+};
 
 /* kexec interface functions */
 extern void machine_kexec(struct kimage *image);
@@ -127,8 +210,21 @@ extern asmlinkage long sys_kexec_load(unsigned long entry,
 					struct kexec_segment __user *segments,
 					unsigned long flags);
 extern int kernel_kexec(void);
+extern int kexec_add_buffer(struct kimage *image, char *buffer,
+			    unsigned long bufsz, unsigned long memsz,
+			    unsigned long buf_align, unsigned long buf_min,
+			    unsigned long buf_max, bool top_down,
+			    unsigned long *load_addr);
 extern struct page *kimage_alloc_control_pages(struct kimage *image,
 						unsigned int order);
+extern int kexec_load_purgatory(struct kimage *image, unsigned long min,
+				unsigned long max, int top_down,
+				unsigned long *load_addr);
+extern int kexec_purgatory_get_set_symbol(struct kimage *image,
+					  const char *name, void *buf,
+					  unsigned int size, bool get_value);
+extern void *kexec_purgatory_get_symbol_addr(struct kimage *image,
+					     const char *name);
 extern void crash_kexec(struct pt_regs *);
 int kexec_should_crash(struct task_struct *);
 void crash_save_cpu(struct pt_regs *regs, int cpu);
@@ -177,6 +273,10 @@ extern int kexec_load_disabled;
 #define KEXEC_FLAGS    (KEXEC_ON_CRASH | KEXEC_PRESERVE_CONTEXT)
 #endif
 
+/* List of defined/legal kexec file flags */
+#define KEXEC_FILE_FLAGS	(KEXEC_FILE_UNLOAD | KEXEC_FILE_ON_CRASH | \
+				 KEXEC_FILE_NO_INITRAMFS)
+
 #define VMCOREINFO_BYTES           (4096)
 #define VMCOREINFO_NOTE_NAME       "VMCOREINFO"
 #define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index eb65d29516ca..e0752d204d9e 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -54,39 +54,20 @@ struct mem_cgroup_reclaim_cookie {
 };
 
 #ifdef CONFIG_MEMCG
-/*
- * All "charge" functions with gfp_mask should use GFP_KERNEL or
- * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
- * alloc memory but reclaims memory from all available zones. So, "where I want
- * memory from" bits of gfp_mask has no meaning. So any bits of that field is
- * available but adding a rule is better. charge functions' gfp_mask should
- * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
- * codes.
- * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
- */
+int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
+			  gfp_t gfp_mask, struct mem_cgroup **memcgp);
+void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
+			      bool lrucare);
+void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg);
+void mem_cgroup_uncharge(struct page *page);
+void mem_cgroup_uncharge_list(struct list_head *page_list);
 
-extern int mem_cgroup_charge_anon(struct page *page, struct mm_struct *mm,
-				gfp_t gfp_mask);
-/* for swap handling */
-extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
-		struct page *page, gfp_t mask, struct mem_cgroup **memcgp);
-extern void mem_cgroup_commit_charge_swapin(struct page *page,
-					struct mem_cgroup *memcg);
-extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg);
-
-extern int mem_cgroup_charge_file(struct page *page, struct mm_struct *mm,
-					gfp_t gfp_mask);
+void mem_cgroup_migrate(struct page *oldpage, struct page *newpage,
+			bool lrucare);
 
 struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *);
 struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *);
 
-/* For coalescing uncharge for reducing memcg' overhead*/
-extern void mem_cgroup_uncharge_start(void);
-extern void mem_cgroup_uncharge_end(void);
-
-extern void mem_cgroup_uncharge_page(struct page *page);
-extern void mem_cgroup_uncharge_cache_page(struct page *page);
-
 bool __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
 				  struct mem_cgroup *memcg);
 bool task_in_mem_cgroup(struct task_struct *task,
@@ -113,12 +94,6 @@ bool mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *memcg)
 
 extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
 
-extern void
-mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
-			     struct mem_cgroup **memcgp);
-extern void mem_cgroup_end_migration(struct mem_cgroup *memcg,
-	struct page *oldpage, struct page *newpage, bool migration_ok);
-
 struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
 				   struct mem_cgroup *,
 				   struct mem_cgroup_reclaim_cookie *);
@@ -133,8 +108,6 @@ unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list);
 void mem_cgroup_update_lru_size(struct lruvec *, enum lru_list, int);
 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
 					struct task_struct *p);
-extern void mem_cgroup_replace_page_cache(struct page *oldpage,
-					struct page *newpage);
 
 static inline void mem_cgroup_oom_enable(void)
 {
@@ -233,46 +206,36 @@ void mem_cgroup_print_bad_page(struct page *page);
 #else /* CONFIG_MEMCG */
 struct mem_cgroup;
 
-static inline int mem_cgroup_charge_anon(struct page *page,
-					struct mm_struct *mm, gfp_t gfp_mask)
-{
-	return 0;
-}
-
-static inline int mem_cgroup_charge_file(struct page *page,
-					struct mm_struct *mm, gfp_t gfp_mask)
-{
-	return 0;
-}
-
-static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
-		struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp)
+static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
+					gfp_t gfp_mask,
+					struct mem_cgroup **memcgp)
 {
+	*memcgp = NULL;
 	return 0;
 }
 
-static inline void mem_cgroup_commit_charge_swapin(struct page *page,
-					  struct mem_cgroup *memcg)
-{
-}
-
-static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
+static inline void mem_cgroup_commit_charge(struct page *page,
+					    struct mem_cgroup *memcg,
+					    bool lrucare)
 {
 }
 
-static inline void mem_cgroup_uncharge_start(void)
+static inline void mem_cgroup_cancel_charge(struct page *page,
+					    struct mem_cgroup *memcg)
 {
 }
 
-static inline void mem_cgroup_uncharge_end(void)
+static inline void mem_cgroup_uncharge(struct page *page)
 {
 }
 
-static inline void mem_cgroup_uncharge_page(struct page *page)
+static inline void mem_cgroup_uncharge_list(struct list_head *page_list)
 {
 }
 
-static inline void mem_cgroup_uncharge_cache_page(struct page *page)
+static inline void mem_cgroup_migrate(struct page *oldpage,
+				      struct page *newpage,
+				      bool lrucare)
 {
 }
 
@@ -311,17 +274,6 @@ static inline struct cgroup_subsys_state
 	return NULL;
 }
 
-static inline void
-mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
-			     struct mem_cgroup **memcgp)
-{
-}
-
-static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg,
-		struct page *oldpage, struct page *newpage, bool migration_ok)
-{
-}
-
 static inline struct mem_cgroup *
 mem_cgroup_iter(struct mem_cgroup *root,
 		struct mem_cgroup *prev,
@@ -417,10 +369,6 @@ static inline
 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
 {
 }
-static inline void mem_cgroup_replace_page_cache(struct page *oldpage,
-				struct page *newpage)
-{
-}
 #endif /* CONFIG_MEMCG */
 
 #if !defined(CONFIG_MEMCG) || !defined(CONFIG_DEBUG_VM)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index e03dd29145a0..8981cc882ed2 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2014,13 +2014,20 @@ static inline bool kernel_page_present(struct page *page) { return true; }
 #endif /* CONFIG_HIBERNATION */
 #endif
 
+#ifdef __HAVE_ARCH_GATE_AREA
 extern struct vm_area_struct *get_gate_vma(struct mm_struct *mm);
-#ifdef	__HAVE_ARCH_GATE_AREA
-int in_gate_area_no_mm(unsigned long addr);
-int in_gate_area(struct mm_struct *mm, unsigned long addr);
+extern int in_gate_area_no_mm(unsigned long addr);
+extern int in_gate_area(struct mm_struct *mm, unsigned long addr);
 #else
-int in_gate_area_no_mm(unsigned long addr);
-#define in_gate_area(mm, addr) ({(void)mm; in_gate_area_no_mm(addr);})
+static inline struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
+{
+	return NULL;
+}
+static inline int in_gate_area_no_mm(unsigned long addr) { return 0; }
+static inline int in_gate_area(struct mm_struct *mm, unsigned long addr)
+{
+	return 0;
+}
 #endif	/* __HAVE_ARCH_GATE_AREA */
 
 #ifdef CONFIG_SYSCTL
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 796deac19fcf..6e0b286649f1 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -461,6 +461,7 @@ static inline void mm_init_cpumask(struct mm_struct *mm)
 #ifdef CONFIG_CPUMASK_OFFSTACK
 	mm->cpu_vm_mask_var = &mm->cpumask_allocation;
 #endif
+	cpumask_clear(mm->cpu_vm_mask_var);
 }
 
 /* Future-safe accessor for struct mm_struct's cpu_vm_mask. */
diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h
index 777a524716db..5c831f1eca79 100644
--- a/include/linux/page_cgroup.h
+++ b/include/linux/page_cgroup.h
@@ -3,17 +3,15 @@
 
 enum {
 	/* flags for mem_cgroup */
-	PCG_LOCK,  /* Lock for pc->mem_cgroup and following bits. */
-	PCG_USED, /* this object is in use. */
-	PCG_MIGRATION, /* under page migration */
-	__NR_PCG_FLAGS,
+	PCG_USED = 0x01,	/* This page is charged to a memcg */
+	PCG_MEM = 0x02,		/* This page holds a memory charge */
+	PCG_MEMSW = 0x04,	/* This page holds a memory+swap charge */
 };
 
-#ifndef __GENERATING_BOUNDS_H
-#include <generated/bounds.h>
+struct pglist_data;
 
 #ifdef CONFIG_MEMCG
-#include <linux/bit_spinlock.h>
+struct mem_cgroup;
 
 /*
  * Page Cgroup can be considered as an extended mem_map.
@@ -27,65 +25,30 @@ struct page_cgroup {
 	struct mem_cgroup *mem_cgroup;
 };
 
-void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat);
+extern void pgdat_page_cgroup_init(struct pglist_data *pgdat);
 
 #ifdef CONFIG_SPARSEMEM
-static inline void __init page_cgroup_init_flatmem(void)
+static inline void page_cgroup_init_flatmem(void)
 {
 }
-extern void __init page_cgroup_init(void);
+extern void page_cgroup_init(void);
 #else
-void __init page_cgroup_init_flatmem(void);
-static inline void __init page_cgroup_init(void)
+extern void page_cgroup_init_flatmem(void);
+static inline void page_cgroup_init(void)
 {
 }
 #endif
 
 struct page_cgroup *lookup_page_cgroup(struct page *page);
-struct page *lookup_cgroup_page(struct page_cgroup *pc);
-
-#define TESTPCGFLAG(uname, lname)			\
-static inline int PageCgroup##uname(struct page_cgroup *pc)	\
-	{ return test_bit(PCG_##lname, &pc->flags); }
-
-#define SETPCGFLAG(uname, lname)			\
-static inline void SetPageCgroup##uname(struct page_cgroup *pc)\
-	{ set_bit(PCG_##lname, &pc->flags);  }
-
-#define CLEARPCGFLAG(uname, lname)			\
-static inline void ClearPageCgroup##uname(struct page_cgroup *pc)	\
-	{ clear_bit(PCG_##lname, &pc->flags);  }
-
-#define TESTCLEARPCGFLAG(uname, lname)			\
-static inline int TestClearPageCgroup##uname(struct page_cgroup *pc)	\
-	{ return test_and_clear_bit(PCG_##lname, &pc->flags);  }
-
-TESTPCGFLAG(Used, USED)
-CLEARPCGFLAG(Used, USED)
-SETPCGFLAG(Used, USED)
-
-SETPCGFLAG(Migration, MIGRATION)
-CLEARPCGFLAG(Migration, MIGRATION)
-TESTPCGFLAG(Migration, MIGRATION)
 
-static inline void lock_page_cgroup(struct page_cgroup *pc)
+static inline int PageCgroupUsed(struct page_cgroup *pc)
 {
-	/*
-	 * Don't take this lock in IRQ context.
-	 * This lock is for pc->mem_cgroup, USED, MIGRATION
-	 */
-	bit_spin_lock(PCG_LOCK, &pc->flags);
+	return !!(pc->flags & PCG_USED);
 }
-
-static inline void unlock_page_cgroup(struct page_cgroup *pc)
-{
-	bit_spin_unlock(PCG_LOCK, &pc->flags);
-}
-
-#else /* CONFIG_MEMCG */
+#else /* !CONFIG_MEMCG */
 struct page_cgroup;
 
-static inline void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat)
+static inline void pgdat_page_cgroup_init(struct pglist_data *pgdat)
 {
 }
 
@@ -98,10 +61,9 @@ static inline void page_cgroup_init(void)
 {
 }
 
-static inline void __init page_cgroup_init_flatmem(void)
+static inline void page_cgroup_init_flatmem(void)
 {
 }
-
 #endif /* CONFIG_MEMCG */
 
 #include <linux/swap.h>
@@ -140,6 +102,4 @@ static inline void swap_cgroup_swapoff(int type)
 
 #endif /* CONFIG_MEMCG_SWAP */
 
-#endif /* !__GENERATING_BOUNDS_H */
-
 #endif /* __LINUX_PAGE_CGROUP_H */
diff --git a/include/linux/rio_drv.h b/include/linux/rio_drv.h
index 5059994fe297..9fc2f213e74f 100644
--- a/include/linux/rio_drv.h
+++ b/include/linux/rio_drv.h
@@ -384,11 +384,16 @@ void rio_dev_put(struct rio_dev *);
 
 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
 extern struct dma_chan *rio_request_dma(struct rio_dev *rdev);
+extern struct dma_chan *rio_request_mport_dma(struct rio_mport *mport);
 extern void rio_release_dma(struct dma_chan *dchan);
 extern struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(
 		struct rio_dev *rdev, struct dma_chan *dchan,
 		struct rio_dma_data *data,
 		enum dma_transfer_direction direction, unsigned long flags);
+extern struct dma_async_tx_descriptor *rio_dma_prep_xfer(
+		struct dma_chan *dchan,	u16 destid,
+		struct rio_dma_data *data,
+		enum dma_transfer_direction direction, unsigned long flags);
 #endif
 
 /**
diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h
index f4ec8bbcb372..ed8f9e70df9b 100644
--- a/include/linux/scatterlist.h
+++ b/include/linux/scatterlist.h
@@ -136,7 +136,7 @@ static inline void sg_set_buf(struct scatterlist *sg, const void *buf,
 static inline void sg_chain(struct scatterlist *prv, unsigned int prv_nents,
 			    struct scatterlist *sgl)
 {
-#ifndef ARCH_HAS_SG_CHAIN
+#ifndef CONFIG_ARCH_HAS_SG_CHAIN
 	BUG();
 #endif
 
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 7c19d552dc3f..db2f6474e95e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -33,6 +33,7 @@ struct sched_param {
 
 #include <linux/smp.h>
 #include <linux/sem.h>
+#include <linux/shm.h>
 #include <linux/signal.h>
 #include <linux/compiler.h>
 #include <linux/completion.h>
@@ -1385,6 +1386,7 @@ struct task_struct {
 #ifdef CONFIG_SYSVIPC
 /* ipc stuff */
 	struct sysv_sem sysvsem;
+	struct sysv_shm sysvshm;
 #endif
 #ifdef CONFIG_DETECT_HUNG_TASK
 /* hung task detection */
@@ -1628,12 +1630,6 @@ struct task_struct {
 	unsigned long trace_recursion;
 #endif /* CONFIG_TRACING */
 #ifdef CONFIG_MEMCG /* memcg uses this to do batch job */
-	struct memcg_batch_info {
-		int do_batch;	/* incremented when batch uncharge started */
-		struct mem_cgroup *memcg; /* target memcg of uncharge */
-		unsigned long nr_pages;	/* uncharged usage */
-		unsigned long memsw_nr_pages; /* uncharged mem+swap usage */
-	} memcg_batch;
 	unsigned int memcg_kmem_skip_account;
 	struct memcg_oom_info {
 		struct mem_cgroup *memcg;
@@ -2967,15 +2963,10 @@ static inline void inc_syscw(struct task_struct *tsk)
 
 #ifdef CONFIG_MEMCG
 extern void mm_update_next_owner(struct mm_struct *mm);
-extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p);
 #else
 static inline void mm_update_next_owner(struct mm_struct *mm)
 {
 }
-
-static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
-{
-}
 #endif /* CONFIG_MEMCG */
 
 static inline unsigned long task_rlimit(const struct task_struct *tsk,
diff --git a/include/linux/shm.h b/include/linux/shm.h
index 57d77709fbe2..6fb801686ad6 100644
--- a/include/linux/shm.h
+++ b/include/linux/shm.h
@@ -1,6 +1,7 @@
 #ifndef _LINUX_SHM_H_
 #define _LINUX_SHM_H_
 
+#include <linux/list.h>
 #include <asm/page.h>
 #include <uapi/linux/shm.h>
 #include <asm/shmparam.h>
@@ -20,6 +21,7 @@ struct shmid_kernel /* private to the kernel */
 
 	/* The task created the shm object.  NULL if the task is dead. */
 	struct task_struct	*shm_creator;
+	struct list_head	shm_clist;	/* list by creator */
 };
 
 /* shm_mode upper byte flags */
@@ -44,11 +46,20 @@ struct shmid_kernel /* private to the kernel */
 #define SHM_HUGE_1GB    (30 << SHM_HUGE_SHIFT)
 
 #ifdef CONFIG_SYSVIPC
+struct sysv_shm {
+	struct list_head shm_clist;
+};
+
 long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr,
 	      unsigned long shmlba);
-extern int is_file_shm_hugepages(struct file *file);
-extern void exit_shm(struct task_struct *task);
+int is_file_shm_hugepages(struct file *file);
+void exit_shm(struct task_struct *task);
+#define shm_init_task(task) INIT_LIST_HEAD(&(task)->sysvshm.shm_clist)
 #else
+struct sysv_shm {
+	/* empty */
+};
+
 static inline long do_shmat(int shmid, char __user *shmaddr,
 			    int shmflg, unsigned long *addr,
 			    unsigned long shmlba)
@@ -62,6 +73,9 @@ static inline int is_file_shm_hugepages(struct file *file)
 static inline void exit_shm(struct task_struct *task)
 {
 }
+static inline void shm_init_task(struct task_struct *task)
+{
+}
 #endif
 
 #endif /* _LINUX_SHM_H_ */
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index 4d1771c2d29f..50777b5b1e4c 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -1,6 +1,7 @@
 #ifndef __SHMEM_FS_H
 #define __SHMEM_FS_H
 
+#include <linux/file.h>
 #include <linux/swap.h>
 #include <linux/mempolicy.h>
 #include <linux/pagemap.h>
@@ -11,6 +12,7 @@
 
 struct shmem_inode_info {
 	spinlock_t		lock;
+	unsigned int		seals;		/* shmem seals */
 	unsigned long		flags;
 	unsigned long		alloced;	/* data pages alloced to file */
 	union {
@@ -65,4 +67,19 @@ static inline struct page *shmem_read_mapping_page(
 					mapping_gfp_mask(mapping));
 }
 
+#ifdef CONFIG_TMPFS
+
+extern int shmem_add_seals(struct file *file, unsigned int seals);
+extern int shmem_get_seals(struct file *file);
+extern long shmem_fcntl(struct file *file, unsigned int cmd, unsigned long arg);
+
+#else
+
+static inline long shmem_fcntl(struct file *f, unsigned int c, unsigned long a)
+{
+	return -EINVAL;
+}
+
+#endif
+
 #endif
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 1eb64043c076..1b72060f093a 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -320,6 +320,9 @@ extern void swap_setup(void);
 
 extern void add_page_to_unevictable_list(struct page *page);
 
+extern void lru_cache_add_active_or_unevictable(struct page *page,
+						struct vm_area_struct *vma);
+
 /* linux/mm/vmscan.c */
 extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
 					gfp_t gfp_mask, nodemask_t *mask);
@@ -378,9 +381,13 @@ static inline int mem_cgroup_swappiness(struct mem_cgroup *mem)
 }
 #endif
 #ifdef CONFIG_MEMCG_SWAP
-extern void mem_cgroup_uncharge_swap(swp_entry_t ent);
+extern void mem_cgroup_swapout(struct page *page, swp_entry_t entry);
+extern void mem_cgroup_uncharge_swap(swp_entry_t entry);
 #else
-static inline void mem_cgroup_uncharge_swap(swp_entry_t ent)
+static inline void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
+{
+}
+static inline void mem_cgroup_uncharge_swap(swp_entry_t entry)
 {
 }
 #endif
@@ -440,7 +447,7 @@ extern void swap_shmem_alloc(swp_entry_t);
 extern int swap_duplicate(swp_entry_t);
 extern int swapcache_prepare(swp_entry_t);
 extern void swap_free(swp_entry_t);
-extern void swapcache_free(swp_entry_t, struct page *page);
+extern void swapcache_free(swp_entry_t);
 extern int free_swap_and_cache(swp_entry_t);
 extern int swap_type_of(dev_t, sector_t, struct block_device **);
 extern unsigned int count_swap_pages(int, int);
@@ -504,7 +511,7 @@ static inline void swap_free(swp_entry_t swp)
 {
 }
 
-static inline void swapcache_free(swp_entry_t swp, struct page *page)
+static inline void swapcache_free(swp_entry_t swp)
 {
 }
 
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 701daff5d899..0f86d85a9ce4 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -317,6 +317,10 @@ asmlinkage long sys_restart_syscall(void);
 asmlinkage long sys_kexec_load(unsigned long entry, unsigned long nr_segments,
 				struct kexec_segment __user *segments,
 				unsigned long flags);
+asmlinkage long sys_kexec_file_load(int kernel_fd, int initrd_fd,
+				    unsigned long cmdline_len,
+				    const char __user *cmdline_ptr,
+				    unsigned long flags);
 
 asmlinkage long sys_exit(int error_code);
 asmlinkage long sys_exit_group(int error_code);
@@ -802,6 +806,7 @@ asmlinkage long sys_timerfd_settime(int ufd, int flags,
 asmlinkage long sys_timerfd_gettime(int ufd, struct itimerspec __user *otmr);
 asmlinkage long sys_eventfd(unsigned int count);
 asmlinkage long sys_eventfd2(unsigned int count, int flags);
+asmlinkage long sys_memfd_create(const char __user *uname_ptr, unsigned int flags);
 asmlinkage long sys_fallocate(int fd, int mode, loff_t offset, loff_t len);
 asmlinkage long sys_old_readdir(unsigned int, struct old_linux_dirent __user *, unsigned int);
 asmlinkage long sys_pselect6(int, fd_set __user *, fd_set __user *,
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 14a8ff2de11e..b7361f831226 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -34,8 +34,6 @@ struct ctl_table_root;
 struct ctl_table_header;
 struct ctl_dir;
 
-typedef struct ctl_table ctl_table;
-
 typedef int proc_handler (struct ctl_table *ctl, int write,
 			  void __user *buffer, size_t *lenp, loff_t *ppos);
 
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index 4836ba3c1cd8..e95372654f09 100644
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -57,9 +57,9 @@ static inline void put_user_ns(struct user_namespace *ns)
 }
 
 struct seq_operations;
-extern struct seq_operations proc_uid_seq_operations;
-extern struct seq_operations proc_gid_seq_operations;
-extern struct seq_operations proc_projid_seq_operations;
+extern const struct seq_operations proc_uid_seq_operations;
+extern const struct seq_operations proc_gid_seq_operations;
+extern const struct seq_operations proc_projid_seq_operations;
 extern ssize_t proc_uid_map_write(struct file *, const char __user *, size_t, loff_t *);
 extern ssize_t proc_gid_map_write(struct file *, const char __user *, size_t, loff_t *);
 extern ssize_t proc_projid_map_write(struct file *, const char __user *, size_t, loff_t *);
diff --git a/include/linux/zlib.h b/include/linux/zlib.h
index 197abb2a54c5..92dbbd3f6c75 100644
--- a/include/linux/zlib.h
+++ b/include/linux/zlib.h
@@ -83,11 +83,11 @@ struct internal_state;
 
 typedef struct z_stream_s {
     const Byte *next_in;   /* next input byte */
-    uInt     avail_in;  /* number of bytes available at next_in */
+	uLong avail_in;  /* number of bytes available at next_in */
     uLong    total_in;  /* total nb of input bytes read so far */
 
     Byte    *next_out;  /* next output byte should be put there */
-    uInt     avail_out; /* remaining free space at next_out */
+	uLong avail_out; /* remaining free space at next_out */
     uLong    total_out; /* total nb of bytes output so far */
 
     char     *msg;      /* last error message, NULL if no error */
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index e6df23cae7be..261e708010da 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -31,7 +31,7 @@ enum scsi_timeouts {
  * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
  * is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
  */
-#ifdef ARCH_HAS_SG_CHAIN
+#ifdef CONFIG_ARCH_HAS_SG_CHAIN
 #define SCSI_MAX_SG_CHAIN_SEGMENTS	2048
 #else
 #define SCSI_MAX_SG_CHAIN_SEGMENTS	SCSI_MAX_SG_SEGMENTS
diff --git a/include/uapi/linux/fcntl.h b/include/uapi/linux/fcntl.h
index 074b886c6be0..beed138bd359 100644
--- a/include/uapi/linux/fcntl.h
+++ b/include/uapi/linux/fcntl.h
@@ -28,6 +28,21 @@
 #define F_GETPIPE_SZ	(F_LINUX_SPECIFIC_BASE + 8)
 
 /*
+ * Set/Get seals
+ */
+#define F_ADD_SEALS	(F_LINUX_SPECIFIC_BASE + 9)
+#define F_GET_SEALS	(F_LINUX_SPECIFIC_BASE + 10)
+
+/*
+ * Types of seals
+ */
+#define F_SEAL_SEAL	0x0001	/* prevent further seals from being set */
+#define F_SEAL_SHRINK	0x0002	/* prevent file from shrinking */
+#define F_SEAL_GROW	0x0004	/* prevent file from growing */
+#define F_SEAL_WRITE	0x0008	/* prevent writes */
+/* (1U << 31) is reserved for signed error codes */
+
+/*
  * Types of directory notifications that may be requested.
  */
 #define DN_ACCESS	0x00000001	/* File accessed */
diff --git a/include/uapi/linux/kexec.h b/include/uapi/linux/kexec.h
index d6629d49a243..6925f5b42f89 100644
--- a/include/uapi/linux/kexec.h
+++ b/include/uapi/linux/kexec.h
@@ -13,6 +13,17 @@
 #define KEXEC_PRESERVE_CONTEXT	0x00000002
 #define KEXEC_ARCH_MASK		0xffff0000
 
+/*
+ * Kexec file load interface flags.
+ * KEXEC_FILE_UNLOAD : Unload already loaded kexec/kdump image.
+ * KEXEC_FILE_ON_CRASH : Load/unload operation belongs to kdump image.
+ * KEXEC_FILE_NO_INITRAMFS : No initramfs is being loaded. Ignore the initrd
+ *                           fd field.
+ */
+#define KEXEC_FILE_UNLOAD	0x00000001
+#define KEXEC_FILE_ON_CRASH	0x00000002
+#define KEXEC_FILE_NO_INITRAMFS	0x00000004
+
 /* These values match the ELF architecture values.
  * Unless there is a good reason that should continue to be the case.
  */
diff --git a/include/uapi/linux/memfd.h b/include/uapi/linux/memfd.h
new file mode 100644
index 000000000000..534e364bda92
--- /dev/null
+++ b/include/uapi/linux/memfd.h
@@ -0,0 +1,8 @@
+#ifndef _UAPI_LINUX_MEMFD_H
+#define _UAPI_LINUX_MEMFD_H
+
+/* flags for memfd_create(2) (unsigned int) */
+#define MFD_CLOEXEC		0x0001U
+#define MFD_ALLOW_SEALING	0x0002U
+
+#endif /* _UAPI_LINUX_MEMFD_H */
diff --git a/init/Kconfig b/init/Kconfig
index a291b7ef4738..44f9ed3dae22 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -783,8 +783,13 @@ endchoice
 
 endmenu # "RCU Subsystem"
 
+config BUILD_BIN2C
+	bool
+	default n
+
 config IKCONFIG
 	tristate "Kernel .config support"
+	select BUILD_BIN2C
 	---help---
 	  This option enables the complete Linux kernel ".config" file
 	  contents to be saved in the kernel. It provides documentation
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 82f22885c87e..b6237c31b0e2 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -539,12 +539,6 @@ void __init prepare_namespace(void)
 {
 	int is_floppy;
 
-	if (root_delay) {
-		printk(KERN_INFO "Waiting %d sec before mounting root device...\n",
-		       root_delay);
-		ssleep(root_delay);
-	}
-
 	/*
 	 * wait for the known devices to complete their probing
 	 *
@@ -571,6 +565,12 @@ void __init prepare_namespace(void)
 	if (initrd_load())
 		goto out;
 
+	if (root_delay) {
+		pr_info("Waiting %d sec before mounting root device...\n",
+			root_delay);
+		ssleep(root_delay);
+	}
+
 	/* wait for any asynchronous scanning to complete */
 	if ((ROOT_DEV == 0) && root_wait) {
 		printk(KERN_INFO "Waiting for root device %s...\n",
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index a8227022e3a0..e5d059e8aa11 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -311,9 +311,9 @@ static int exit_code;
 static int decompress_error;
 static int crd_infd, crd_outfd;
 
-static int __init compr_fill(void *buf, unsigned int len)
+static long __init compr_fill(void *buf, unsigned long len)
 {
-	int r = sys_read(crd_infd, buf, len);
+	long r = sys_read(crd_infd, buf, len);
 	if (r < 0)
 		printk(KERN_ERR "RAMDISK: error while reading compressed data");
 	else if (r == 0)
@@ -321,13 +321,13 @@ static int __init compr_fill(void *buf, unsigned int len)
 	return r;
 }
 
-static int __init compr_flush(void *window, unsigned int outcnt)
+static long __init compr_flush(void *window, unsigned long outcnt)
 {
-	int written = sys_write(crd_outfd, window, outcnt);
+	long written = sys_write(crd_outfd, window, outcnt);
 	if (written != outcnt) {
 		if (decompress_error == 0)
 			printk(KERN_ERR
-			       "RAMDISK: incomplete write (%d != %d)\n",
+			       "RAMDISK: incomplete write (%ld != %ld)\n",
 			       written, outcnt);
 		decompress_error = 1;
 		return -1;
diff --git a/init/initramfs.c b/init/initramfs.c
index a8497fab1c3d..bece48c3461e 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -19,6 +19,29 @@
 #include <linux/syscalls.h>
 #include <linux/utime.h>
 
+static ssize_t __init xwrite(int fd, const char *p, size_t count)
+{
+	ssize_t out = 0;
+
+	/* sys_write only can write MAX_RW_COUNT aka 2G-4K bytes at most */
+	while (count) {
+		ssize_t rv = sys_write(fd, p, count);
+
+		if (rv < 0) {
+			if (rv == -EINTR || rv == -EAGAIN)
+				continue;
+			return out ? out : rv;
+		} else if (rv == 0)
+			break;
+
+		p += rv;
+		out += rv;
+		count -= rv;
+	}
+
+	return out;
+}
+
 static __initdata char *message;
 static void __init error(char *x)
 {
@@ -174,7 +197,7 @@ static __initdata enum state {
 } state, next_state;
 
 static __initdata char *victim;
-static __initdata unsigned count;
+static unsigned long count __initdata;
 static __initdata loff_t this_header, next_header;
 
 static inline void __init eat(unsigned n)
@@ -186,7 +209,7 @@ static inline void __init eat(unsigned n)
 
 static __initdata char *vcollected;
 static __initdata char *collected;
-static __initdata int remains;
+static long remains __initdata;
 static __initdata char *collect;
 
 static void __init read_into(char *buf, unsigned size, enum state next)
@@ -213,7 +236,7 @@ static int __init do_start(void)
 
 static int __init do_collect(void)
 {
-	unsigned n = remains;
+	unsigned long n = remains;
 	if (count < n)
 		n = count;
 	memcpy(collect, victim, n);
@@ -346,7 +369,8 @@ static int __init do_name(void)
 static int __init do_copy(void)
 {
 	if (count >= body_len) {
-		sys_write(wfd, victim, body_len);
+		if (xwrite(wfd, victim, body_len) != body_len)
+			error("write error");
 		sys_close(wfd);
 		do_utime(vcollected, mtime);
 		kfree(vcollected);
@@ -354,7 +378,8 @@ static int __init do_copy(void)
 		state = SkipIt;
 		return 0;
 	} else {
-		sys_write(wfd, victim, count);
+		if (xwrite(wfd, victim, count) != count)
+			error("write error");
 		body_len -= count;
 		eat(count);
 		return 1;
@@ -384,7 +409,7 @@ static __initdata int (*actions[])(void) = {
 	[Reset]		= do_reset,
 };
 
-static int __init write_buffer(char *buf, unsigned len)
+static long __init write_buffer(char *buf, unsigned long len)
 {
 	count = len;
 	victim = buf;
@@ -394,11 +419,11 @@ static int __init write_buffer(char *buf, unsigned len)
 	return len - count;
 }
 
-static int __init flush_buffer(void *bufv, unsigned len)
+static long __init flush_buffer(void *bufv, unsigned long len)
 {
 	char *buf = (char *) bufv;
-	int written;
-	int origLen = len;
+	long written;
+	long origLen = len;
 	if (message)
 		return -1;
 	while ((written = write_buffer(buf, len)) < len && !message) {
@@ -417,13 +442,13 @@ static int __init flush_buffer(void *bufv, unsigned len)
 	return origLen;
 }
 
-static unsigned my_inptr;   /* index of next byte to be processed in inbuf */
+static unsigned long my_inptr; /* index of next byte to be processed in inbuf */
 
 #include <linux/decompress/generic.h>
 
-static char * __init unpack_to_rootfs(char *buf, unsigned len)
+static char * __init unpack_to_rootfs(char *buf, unsigned long len)
 {
-	int written, res;
+	long written;
 	decompress_fn decompress;
 	const char *compress_name;
 	static __initdata char msg_buf[64];
@@ -457,7 +482,7 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len)
 		decompress = decompress_method(buf, len, &compress_name);
 		pr_debug("Detected %s compressed data\n", compress_name);
 		if (decompress) {
-			res = decompress(buf, len, NULL, flush_buffer, NULL,
+			int res = decompress(buf, len, NULL, flush_buffer, NULL,
 				   &my_inptr, error);
 			if (res)
 				error("decompressor failed");
@@ -603,8 +628,13 @@ static int __init populate_rootfs(void)
 		fd = sys_open("/initrd.image",
 			      O_WRONLY|O_CREAT, 0700);
 		if (fd >= 0) {
-			sys_write(fd, (char *)initrd_start,
-					initrd_end - initrd_start);
+			ssize_t written = xwrite(fd, (char *)initrd_start,
+						initrd_end - initrd_start);
+
+			if (written != initrd_end - initrd_start)
+				pr_err("/initrd.image: incomplete write (%zd != %ld)\n",
+				       written, initrd_end - initrd_start);
+
 			sys_close(fd);
 			free_initrd();
 		}
diff --git a/init/main.c b/init/main.c
index e8ae1fef0908..bb1aed928f21 100644
--- a/init/main.c
+++ b/init/main.c
@@ -6,7 +6,7 @@
  *  GK 2/5/95  -  Changed to support mounting root fs via NFS
  *  Added initrd & change_root: Werner Almesberger & Hans Lermen, Feb '96
  *  Moan early if gcc is old, avoiding bogus kernels - Paul Gortmaker, May '96
- *  Simplified starting of init:  Michael A. Griffith <grif@acm.org> 
+ *  Simplified starting of init:  Michael A. Griffith <grif@acm.org>
  */
 
 #define DEBUG		/* Enable initcall_debug */
@@ -136,7 +136,7 @@ static char *ramdisk_execute_command;
  * Used to generate warnings if static_key manipulation functions are used
  * before jump_label_init is called.
  */
-bool static_key_initialized __read_mostly = false;
+bool static_key_initialized __read_mostly;
 EXPORT_SYMBOL_GPL(static_key_initialized);
 
 /*
@@ -159,8 +159,8 @@ static int __init set_reset_devices(char *str)
 
 __setup("reset_devices", set_reset_devices);
 
-static const char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
-const char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
+static const char *argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
+const char *envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
 static const char *panic_later, *panic_param;
 
 extern const struct obs_kernel_param __setup_start[], __setup_end[];
@@ -199,7 +199,6 @@ static int __init obsolete_checksetup(char *line)
  * still work even if initially too large, it will just take slightly longer
  */
 unsigned long loops_per_jiffy = (1<<12);
-
 EXPORT_SYMBOL(loops_per_jiffy);
 
 static int __init debug_kernel(char *str)
@@ -376,8 +375,8 @@ static void __init setup_command_line(char *command_line)
 	initcall_command_line =
 		memblock_virt_alloc(strlen(boot_command_line) + 1, 0);
 	static_command_line = memblock_virt_alloc(strlen(command_line) + 1, 0);
-	strcpy (saved_command_line, boot_command_line);
-	strcpy (static_command_line, command_line);
+	strcpy(saved_command_line, boot_command_line);
+	strcpy(static_command_line, command_line);
 }
 
 /*
@@ -445,8 +444,8 @@ void __init parse_early_options(char *cmdline)
 /* Arch code calls this early on, or if not, just before other parsing. */
 void __init parse_early_param(void)
 {
-	static __initdata int done = 0;
-	static __initdata char tmp_cmdline[COMMAND_LINE_SIZE];
+	static int done __initdata;
+	static char tmp_cmdline[COMMAND_LINE_SIZE] __initdata;
 
 	if (done)
 		return;
@@ -500,7 +499,8 @@ static void __init mm_init(void)
 
 asmlinkage __visible void __init start_kernel(void)
 {
-	char * command_line, *after_dashes;
+	char *command_line;
+	char *after_dashes;
 	extern const struct kernel_param __start___param[], __stop___param[];
 
 	/*
@@ -572,7 +572,8 @@ asmlinkage __visible void __init start_kernel(void)
 	 * fragile until we cpu_idle() for the first time.
 	 */
 	preempt_disable();
-	if (WARN(!irqs_disabled(), "Interrupts were enabled *very* early, fixing it\n"))
+	if (WARN(!irqs_disabled(),
+		 "Interrupts were enabled *very* early, fixing it\n"))
 		local_irq_disable();
 	idr_init_cache();
 	rcu_init();
diff --git a/ipc/shm.c b/ipc/shm.c
index 89fc354156cb..7fc9f9f3a26b 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -178,6 +178,7 @@ static void shm_rcu_free(struct rcu_head *head)
 
 static inline void shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *s)
 {
+	list_del(&s->shm_clist);
 	ipc_rmid(&shm_ids(ns), &s->shm_perm);
 }
 
@@ -268,37 +269,6 @@ static void shm_close(struct vm_area_struct *vma)
 }
 
 /* Called with ns->shm_ids(ns).rwsem locked */
-static int shm_try_destroy_current(int id, void *p, void *data)
-{
-	struct ipc_namespace *ns = data;
-	struct kern_ipc_perm *ipcp = p;
-	struct shmid_kernel *shp = container_of(ipcp, struct shmid_kernel, shm_perm);
-
-	if (shp->shm_creator != current)
-		return 0;
-
-	/*
-	 * Mark it as orphaned to destroy the segment when
-	 * kernel.shm_rmid_forced is changed.
-	 * It is noop if the following shm_may_destroy() returns true.
-	 */
-	shp->shm_creator = NULL;
-
-	/*
-	 * Don't even try to destroy it.  If shm_rmid_forced=0 and IPC_RMID
-	 * is not set, it shouldn't be deleted here.
-	 */
-	if (!ns->shm_rmid_forced)
-		return 0;
-
-	if (shm_may_destroy(ns, shp)) {
-		shm_lock_by_ptr(shp);
-		shm_destroy(ns, shp);
-	}
-	return 0;
-}
-
-/* Called with ns->shm_ids(ns).rwsem locked */
 static int shm_try_destroy_orphaned(int id, void *p, void *data)
 {
 	struct ipc_namespace *ns = data;
@@ -329,18 +299,50 @@ void shm_destroy_orphaned(struct ipc_namespace *ns)
 	up_write(&shm_ids(ns).rwsem);
 }
 
-
+/* Locking assumes this will only be called with task == current */
 void exit_shm(struct task_struct *task)
 {
 	struct ipc_namespace *ns = task->nsproxy->ipc_ns;
+	struct shmid_kernel *shp, *n;
 
-	if (shm_ids(ns).in_use == 0)
+	if (list_empty(&task->sysvshm.shm_clist))
 		return;
 
-	/* Destroy all already created segments, but not mapped yet */
+	/*
+	 * If kernel.shm_rmid_forced is not set then only keep track of
+	 * which shmids are orphaned, so that a later set of the sysctl
+	 * can clean them up.
+	 */
+	if (!ns->shm_rmid_forced) {
+		down_read(&shm_ids(ns).rwsem);
+		list_for_each_entry(shp, &task->sysvshm.shm_clist, shm_clist)
+			shp->shm_creator = NULL;
+		/*
+		 * Only under read lock but we are only called on current
+		 * so no entry on the list will be shared.
+		 */
+		list_del(&task->sysvshm.shm_clist);
+		up_read(&shm_ids(ns).rwsem);
+		return;
+	}
+
+	/*
+	 * Destroy all already created segments, that were not yet mapped,
+	 * and mark any mapped as orphan to cover the sysctl toggling.
+	 * Destroy is skipped if shm_may_destroy() returns false.
+	 */
 	down_write(&shm_ids(ns).rwsem);
-	if (shm_ids(ns).in_use)
-		idr_for_each(&shm_ids(ns).ipcs_idr, &shm_try_destroy_current, ns);
+	list_for_each_entry_safe(shp, n, &task->sysvshm.shm_clist, shm_clist) {
+		shp->shm_creator = NULL;
+
+		if (shm_may_destroy(ns, shp)) {
+			shm_lock_by_ptr(shp);
+			shm_destroy(ns, shp);
+		}
+	}
+
+	/* Remove the list head from any segments still attached. */
+	list_del(&task->sysvshm.shm_clist);
 	up_write(&shm_ids(ns).rwsem);
 }
 
@@ -561,6 +563,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
 	shp->shm_nattch = 0;
 	shp->shm_file = file;
 	shp->shm_creator = current;
+	list_add(&shp->shm_clist, &current->sysvshm.shm_clist);
 
 	/*
 	 * shmid gets reported as "inode#" in /proc/pid/maps.
diff --git a/kernel/Makefile b/kernel/Makefile
index 0026cf531769..dc5c77544fd6 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -105,7 +105,7 @@ targets += config_data.gz
 $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
 	$(call if_changed,gzip)
 
-      filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/bin2c; echo "MAGIC_END;")
+      filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/basic/bin2c; echo "MAGIC_END;")
 targets += config_data.h
 $(obj)/config_data.h: $(obj)/config_data.gz FORCE
 	$(call filechk,ikconfiggz)
diff --git a/kernel/acct.c b/kernel/acct.c
index a1844f14c6d6..51793520566f 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -141,12 +141,12 @@ static int check_free_space(struct bsd_acct_struct *acct, struct file *file)
 	if (acct->active) {
 		if (act < 0) {
 			acct->active = 0;
-			printk(KERN_INFO "Process accounting paused\n");
+			pr_info("Process accounting paused\n");
 		}
 	} else {
 		if (act > 0) {
 			acct->active = 1;
-			printk(KERN_INFO "Process accounting resumed\n");
+			pr_info("Process accounting resumed\n");
 		}
 	}
 
@@ -261,6 +261,7 @@ SYSCALL_DEFINE1(acct, const char __user *, name)
 
 	if (name) {
 		struct filename *tmp = getname(name);
+
 		if (IS_ERR(tmp))
 			return PTR_ERR(tmp);
 		error = acct_on(tmp);
@@ -376,7 +377,7 @@ static comp_t encode_comp_t(unsigned long value)
 	return exp;
 }
 
-#if ACCT_VERSION==1 || ACCT_VERSION==2
+#if ACCT_VERSION == 1 || ACCT_VERSION == 2
 /*
  * encode an u64 into a comp2_t (24 bits)
  *
@@ -389,7 +390,7 @@ static comp_t encode_comp_t(unsigned long value)
 #define MANTSIZE2       20                      /* 20 bit mantissa. */
 #define EXPSIZE2        5                       /* 5 bit base 2 exponent. */
 #define MAXFRACT2       ((1ul << MANTSIZE2) - 1) /* Maximum fractional value. */
-#define MAXEXP2         ((1 <<EXPSIZE2) - 1)    /* Maximum exponent. */
+#define MAXEXP2         ((1 << EXPSIZE2) - 1)    /* Maximum exponent. */
 
 static comp2_t encode_comp2_t(u64 value)
 {
@@ -420,7 +421,7 @@ static comp2_t encode_comp2_t(u64 value)
 }
 #endif
 
-#if ACCT_VERSION==3
+#if ACCT_VERSION == 3
 /*
  * encode an u64 into a 32 bit IEEE float
  */
@@ -429,8 +430,9 @@ static u32 encode_float(u64 value)
 	unsigned exp = 190;
 	unsigned u;
 
-	if (value==0) return 0;
-	while ((s64)value > 0){
+	if (value == 0)
+		return 0;
+	while ((s64)value > 0) {
 		value <<= 1;
 		exp--;
 	}
@@ -486,16 +488,17 @@ static void do_acct_process(struct bsd_acct_struct *acct,
 	run_time -= current->group_leader->start_time;
 	/* convert nsec -> AHZ */
 	elapsed = nsec_to_AHZ(run_time);
-#if ACCT_VERSION==3
+#if ACCT_VERSION == 3
 	ac.ac_etime = encode_float(elapsed);
 #else
 	ac.ac_etime = encode_comp_t(elapsed < (unsigned long) -1l ?
-	                       (unsigned long) elapsed : (unsigned long) -1l);
+				(unsigned long) elapsed : (unsigned long) -1l);
 #endif
-#if ACCT_VERSION==1 || ACCT_VERSION==2
+#if ACCT_VERSION == 1 || ACCT_VERSION == 2
 	{
 		/* new enlarged etime field */
 		comp2_t etime = encode_comp2_t(elapsed);
+
 		ac.ac_etime_hi = etime >> 16;
 		ac.ac_etime_lo = (u16) etime;
 	}
@@ -505,15 +508,15 @@ static void do_acct_process(struct bsd_acct_struct *acct,
 	/* we really need to bite the bullet and change layout */
 	ac.ac_uid = from_kuid_munged(file->f_cred->user_ns, orig_cred->uid);
 	ac.ac_gid = from_kgid_munged(file->f_cred->user_ns, orig_cred->gid);
-#if ACCT_VERSION==2
+#if ACCT_VERSION == 2
 	ac.ac_ahz = AHZ;
 #endif
-#if ACCT_VERSION==1 || ACCT_VERSION==2
+#if ACCT_VERSION == 1 || ACCT_VERSION == 2
 	/* backward-compatible 16 bit fields */
 	ac.ac_uid16 = ac.ac_uid;
 	ac.ac_gid16 = ac.ac_gid;
 #endif
-#if ACCT_VERSION==3
+#if ACCT_VERSION == 3
 	ac.ac_pid = task_tgid_nr_ns(current, ns);
 	rcu_read_lock();
 	ac.ac_ppid = task_tgid_nr_ns(rcu_dereference(current->real_parent), ns);
@@ -574,6 +577,7 @@ void acct_collect(long exitcode, int group_dead)
 
 	if (group_dead && current->mm) {
 		struct vm_area_struct *vma;
+
 		down_read(&current->mm->mmap_sem);
 		vma = current->mm->mmap;
 		while (vma) {
diff --git a/kernel/bounds.c b/kernel/bounds.c
index 9fd4246b04b8..e1d1d1952bfa 100644
--- a/kernel/bounds.c
+++ b/kernel/bounds.c
@@ -9,7 +9,6 @@
 #include <linux/page-flags.h>
 #include <linux/mmzone.h>
 #include <linux/kbuild.h>
-#include <linux/page_cgroup.h>
 #include <linux/log2.h>
 #include <linux/spinlock_types.h>
 
@@ -18,7 +17,6 @@ void foo(void)
 	/* The enum constants to put into include/generated/bounds.h */
 	DEFINE(NR_PAGEFLAGS, __NR_PAGEFLAGS);
 	DEFINE(MAX_NR_ZONES, __MAX_NR_ZONES);
-	DEFINE(NR_PCG_FLAGS, __NR_PCG_FLAGS);
 #ifdef CONFIG_SMP
 	DEFINE(NR_CPUS_BITS, ilog2(CONFIG_NR_CPUS));
 #endif
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 6f3254e8c137..1d0af8a2c646 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -167,6 +167,11 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
 	/* For mmu_notifiers */
 	const unsigned long mmun_start = addr;
 	const unsigned long mmun_end   = addr + PAGE_SIZE;
+	struct mem_cgroup *memcg;
+
+	err = mem_cgroup_try_charge(kpage, vma->vm_mm, GFP_KERNEL, &memcg);
+	if (err)
+		return err;
 
 	/* For try_to_free_swap() and munlock_vma_page() below */
 	lock_page(page);
@@ -179,6 +184,8 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
 
 	get_page(kpage);
 	page_add_new_anon_rmap(kpage, vma, addr);
+	mem_cgroup_commit_charge(kpage, memcg, false);
+	lru_cache_add_active_or_unevictable(kpage, vma);
 
 	if (!PageAnon(page)) {
 		dec_mm_counter(mm, MM_FILEPAGES);
@@ -200,6 +207,7 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
 
 	err = 0;
  unlock:
+	mem_cgroup_cancel_charge(kpage, memcg);
 	mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
 	unlock_page(page);
 	return err;
@@ -315,18 +323,11 @@ retry:
 	if (!new_page)
 		goto put_old;
 
-	if (mem_cgroup_charge_anon(new_page, mm, GFP_KERNEL))
-		goto put_new;
-
 	__SetPageUptodate(new_page);
 	copy_highpage(new_page, old_page);
 	copy_to_page(new_page, vaddr, &opcode, UPROBE_SWBP_INSN_SIZE);
 
 	ret = __replace_page(vma, vaddr, old_page, new_page);
-	if (ret)
-		mem_cgroup_uncharge_page(new_page);
-
-put_new:
 	page_cache_release(new_page);
 put_old:
 	put_page(old_page);
diff --git a/kernel/exit.c b/kernel/exit.c
index 88c6b3e42583..32c58f7433a3 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -59,7 +59,7 @@
 #include <asm/pgtable.h>
 #include <asm/mmu_context.h>
 
-static void exit_mm(struct task_struct * tsk);
+static void exit_mm(struct task_struct *tsk);
 
 static void __unhash_process(struct task_struct *p, bool group_dead)
 {
@@ -151,7 +151,7 @@ static void __exit_signal(struct task_struct *tsk)
 	spin_unlock(&sighand->siglock);
 
 	__cleanup_sighand(sighand);
-	clear_tsk_thread_flag(tsk,TIF_SIGPENDING);
+	clear_tsk_thread_flag(tsk, TIF_SIGPENDING);
 	if (group_dead) {
 		flush_sigqueue(&sig->shared_pending);
 		tty_kref_put(tty);
@@ -168,7 +168,7 @@ static void delayed_put_task_struct(struct rcu_head *rhp)
 }
 
 
-void release_task(struct task_struct * p)
+void release_task(struct task_struct *p)
 {
 	struct task_struct *leader;
 	int zap_leader;
@@ -192,7 +192,8 @@ repeat:
 	 */
 	zap_leader = 0;
 	leader = p->group_leader;
-	if (leader != p && thread_group_empty(leader) && leader->exit_state == EXIT_ZOMBIE) {
+	if (leader != p && thread_group_empty(leader)
+			&& leader->exit_state == EXIT_ZOMBIE) {
 		/*
 		 * If we were the last child thread and the leader has
 		 * exited already, and the leader's parent ignores SIGCHLD,
@@ -241,7 +242,8 @@ struct pid *session_of_pgrp(struct pid *pgrp)
  *
  * "I ask you, have you ever known what it is to be an orphan?"
  */
-static int will_become_orphaned_pgrp(struct pid *pgrp, struct task_struct *ignored_task)
+static int will_become_orphaned_pgrp(struct pid *pgrp,
+					struct task_struct *ignored_task)
 {
 	struct task_struct *p;
 
@@ -294,9 +296,9 @@ kill_orphaned_pgrp(struct task_struct *tsk, struct task_struct *parent)
 	struct task_struct *ignored_task = tsk;
 
 	if (!parent)
-		 /* exit: our father is in a different pgrp than
-		  * we are and we were the only connection outside.
-		  */
+		/* exit: our father is in a different pgrp than
+		 * we are and we were the only connection outside.
+		 */
 		parent = tsk->real_parent;
 	else
 		/* reparent: our child is in a different pgrp than
@@ -405,7 +407,7 @@ assign_new_owner:
  * Turn us into a lazy TLB process if we
  * aren't already..
  */
-static void exit_mm(struct task_struct * tsk)
+static void exit_mm(struct task_struct *tsk)
 {
 	struct mm_struct *mm = tsk->mm;
 	struct core_state *core_state;
@@ -425,6 +427,7 @@ static void exit_mm(struct task_struct * tsk)
 	core_state = mm->core_state;
 	if (core_state) {
 		struct core_thread self;
+
 		up_read(&mm->mmap_sem);
 
 		self.task = tsk;
@@ -566,6 +569,7 @@ static void forget_original_parent(struct task_struct *father)
 
 	list_for_each_entry_safe(p, n, &father->children, sibling) {
 		struct task_struct *t = p;
+
 		do {
 			t->real_parent = reaper;
 			if (t->parent == father) {
@@ -599,7 +603,7 @@ static void exit_notify(struct task_struct *tsk, int group_dead)
 	/*
 	 * This does two things:
 	 *
-  	 * A.  Make init inherit all the child processes
+	 * A.  Make init inherit all the child processes
 	 * B.  Check to see if any process groups have become orphaned
 	 *	as a result of our exiting, and if they have any stopped
 	 *	jobs, send them a SIGHUP and then a SIGCONT.  (POSIX 3.2.2.2)
@@ -649,9 +653,8 @@ static void check_stack_usage(void)
 
 	spin_lock(&low_water_lock);
 	if (free < lowest_to_date) {
-		printk(KERN_WARNING "%s (%d) used greatest stack depth: "
-				"%lu bytes left\n",
-				current->comm, task_pid_nr(current), free);
+		pr_warn("%s (%d) used greatest stack depth: %lu bytes left\n",
+			current->comm, task_pid_nr(current), free);
 		lowest_to_date = free;
 	}
 	spin_unlock(&low_water_lock);
@@ -692,8 +695,7 @@ void do_exit(long code)
 	 * leave this task alone and wait for reboot.
 	 */
 	if (unlikely(tsk->flags & PF_EXITING)) {
-		printk(KERN_ALERT
-			"Fixing recursive fault but reboot is needed!\n");
+		pr_alert("Fixing recursive fault but reboot is needed!\n");
 		/*
 		 * We can do this unlocked here. The futex code uses
 		 * this flag just to verify whether the pi state
@@ -717,9 +719,9 @@ void do_exit(long code)
 	raw_spin_unlock_wait(&tsk->pi_lock);
 
 	if (unlikely(in_atomic()))
-		printk(KERN_INFO "note: %s[%d] exited with preempt_count %d\n",
-				current->comm, task_pid_nr(current),
-				preempt_count());
+		pr_info("note: %s[%d] exited with preempt_count %d\n",
+			current->comm, task_pid_nr(current),
+			preempt_count());
 
 	acct_update_integrals(tsk);
 	/* sync mm's RSS info before statistics gathering */
@@ -837,7 +839,6 @@ void do_exit(long code)
 	for (;;)
 		cpu_relax();	/* For when BUG is null */
 }
-
 EXPORT_SYMBOL_GPL(do_exit);
 
 void complete_and_exit(struct completion *comp, long code)
@@ -847,7 +848,6 @@ void complete_and_exit(struct completion *comp, long code)
 
 	do_exit(code);
 }
-
 EXPORT_SYMBOL(complete_and_exit);
 
 SYSCALL_DEFINE1(exit, int, error_code)
@@ -870,6 +870,7 @@ do_group_exit(int exit_code)
 		exit_code = sig->group_exit_code;
 	else if (!thread_group_empty(current)) {
 		struct sighand_struct *const sighand = current->sighand;
+
 		spin_lock_irq(&sighand->siglock);
 		if (signal_group_exit(sig))
 			/* Another thread got here before we took the lock.  */
@@ -1034,9 +1035,9 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
 		 * as other threads in the parent group can be right
 		 * here reaping other children at the same time.
 		 *
-		 * We use thread_group_cputime_adjusted() to get times for the thread
-		 * group, which consolidates times for all threads in the
-		 * group including the group leader.
+		 * We use thread_group_cputime_adjusted() to get times for
+		 * the thread group, which consolidates times for all threads
+		 * in the group including the group leader.
 		 */
 		thread_group_cputime_adjusted(p, &tgutime, &tgstime);
 		spin_lock_irq(&p->real_parent->sighand->siglock);
@@ -1418,6 +1419,7 @@ static int do_wait_thread(struct wait_opts *wo, struct task_struct *tsk)
 
 	list_for_each_entry(p, &tsk->children, sibling) {
 		int ret = wait_consider_task(wo, 0, p);
+
 		if (ret)
 			return ret;
 	}
@@ -1431,6 +1433,7 @@ static int ptrace_do_wait(struct wait_opts *wo, struct task_struct *tsk)
 
 	list_for_each_entry(p, &tsk->ptraced, ptrace_entry) {
 		int ret = wait_consider_task(wo, 1, p);
+
 		if (ret)
 			return ret;
 	}
diff --git a/kernel/fork.c b/kernel/fork.c
index fbd3497b221f..1380d8ace334 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -374,12 +374,11 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
 	 */
 	down_write_nested(&mm->mmap_sem, SINGLE_DEPTH_NESTING);
 
-	mm->locked_vm = 0;
-	mm->mmap = NULL;
-	mm->vmacache_seqnum = 0;
-	mm->map_count = 0;
-	cpumask_clear(mm_cpumask(mm));
-	mm->mm_rb = RB_ROOT;
+	mm->total_vm = oldmm->total_vm;
+	mm->shared_vm = oldmm->shared_vm;
+	mm->exec_vm = oldmm->exec_vm;
+	mm->stack_vm = oldmm->stack_vm;
+
 	rb_link = &mm->mm_rb.rb_node;
 	rb_parent = NULL;
 	pprev = &mm->mmap;
@@ -430,7 +429,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
 				atomic_dec(&inode->i_writecount);
 			mutex_lock(&mapping->i_mmap_mutex);
 			if (tmp->vm_flags & VM_SHARED)
-				mapping->i_mmap_writable++;
+				atomic_inc(&mapping->i_mmap_writable);
 			flush_dcache_mmap_lock(mapping);
 			/* insert tmp into the share list, just after mpnt */
 			if (unlikely(tmp->vm_flags & VM_NONLINEAR))
@@ -536,19 +535,37 @@ static void mm_init_aio(struct mm_struct *mm)
 #endif
 }
 
+static void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
+{
+#ifdef CONFIG_MEMCG
+	mm->owner = p;
+#endif
+}
+
 static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p)
 {
+	mm->mmap = NULL;
+	mm->mm_rb = RB_ROOT;
+	mm->vmacache_seqnum = 0;
 	atomic_set(&mm->mm_users, 1);
 	atomic_set(&mm->mm_count, 1);
 	init_rwsem(&mm->mmap_sem);
 	INIT_LIST_HEAD(&mm->mmlist);
 	mm->core_state = NULL;
 	atomic_long_set(&mm->nr_ptes, 0);
+	mm->map_count = 0;
+	mm->locked_vm = 0;
+	mm->pinned_vm = 0;
 	memset(&mm->rss_stat, 0, sizeof(mm->rss_stat));
 	spin_lock_init(&mm->page_table_lock);
+	mm_init_cpumask(mm);
 	mm_init_aio(mm);
 	mm_init_owner(mm, p);
+	mmu_notifier_mm_init(mm);
 	clear_tlb_flush_pending(mm);
+#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS
+	mm->pmd_huge_pte = NULL;
+#endif
 
 	if (current->mm) {
 		mm->flags = current->mm->flags & MMF_INIT_MASK;
@@ -558,11 +575,17 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p)
 		mm->def_flags = 0;
 	}
 
-	if (likely(!mm_alloc_pgd(mm))) {
-		mmu_notifier_mm_init(mm);
-		return mm;
-	}
+	if (mm_alloc_pgd(mm))
+		goto fail_nopgd;
+
+	if (init_new_context(p, mm))
+		goto fail_nocontext;
+
+	return mm;
 
+fail_nocontext:
+	mm_free_pgd(mm);
+fail_nopgd:
 	free_mm(mm);
 	return NULL;
 }
@@ -596,7 +619,6 @@ struct mm_struct *mm_alloc(void)
 		return NULL;
 
 	memset(mm, 0, sizeof(*mm));
-	mm_init_cpumask(mm);
 	return mm_init(mm, current);
 }
 
@@ -828,17 +850,10 @@ static struct mm_struct *dup_mm(struct task_struct *tsk)
 		goto fail_nomem;
 
 	memcpy(mm, oldmm, sizeof(*mm));
-	mm_init_cpumask(mm);
 
-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS
-	mm->pmd_huge_pte = NULL;
-#endif
 	if (!mm_init(mm, tsk))
 		goto fail_nomem;
 
-	if (init_new_context(tsk, mm))
-		goto fail_nocontext;
-
 	dup_mm_exe_file(oldmm, mm);
 
 	err = dup_mmap(mm, oldmm);
@@ -860,15 +875,6 @@ free_pt:
 
 fail_nomem:
 	return NULL;
-
-fail_nocontext:
-	/*
-	 * If init_new_context() failed, we cannot use mmput() to free the mm
-	 * because it calls destroy_context()
-	 */
-	mm_free_pgd(mm);
-	free_mm(mm);
-	return NULL;
 }
 
 static int copy_mm(unsigned long clone_flags, struct task_struct *tsk)
@@ -1140,13 +1146,6 @@ static void rt_mutex_init_task(struct task_struct *p)
 #endif
 }
 
-#ifdef CONFIG_MEMCG
-void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
-{
-	mm->owner = p;
-}
-#endif /* CONFIG_MEMCG */
-
 /*
  * Initialize POSIX timer handling for a single task.
  */
@@ -1346,10 +1345,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 #ifdef CONFIG_DEBUG_MUTEXES
 	p->blocked_on = NULL; /* not blocked yet */
 #endif
-#ifdef CONFIG_MEMCG
-	p->memcg_batch.do_batch = 0;
-	p->memcg_batch.memcg = NULL;
-#endif
 #ifdef CONFIG_BCACHE
 	p->sequential_io	= 0;
 	p->sequential_io_avg	= 0;
@@ -1367,6 +1362,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	if (retval)
 		goto bad_fork_cleanup_policy;
 	/* copy all the process information */
+	shm_init_task(p);
 	retval = copy_semundo(clone_flags, p);
 	if (retval)
 		goto bad_fork_cleanup_audit;
@@ -1918,6 +1914,11 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
 			 */
 			exit_sem(current);
 		}
+		if (unshare_flags & CLONE_NEWIPC) {
+			/* Orphan segments in old ns (see sem above). */
+			exit_shm(current);
+			shm_init_task(current);
+		}
 
 		if (new_nsproxy)
 			switch_task_namespaces(current, new_nsproxy);
diff --git a/kernel/gcov/fs.c b/kernel/gcov/fs.c
index 15ff01a76379..edf67c493a8e 100644
--- a/kernel/gcov/fs.c
+++ b/kernel/gcov/fs.c
@@ -784,8 +784,7 @@ static __init int gcov_fs_init(void)
 
 err_remove:
 	pr_err("init failed\n");
-	if (root_node.dentry)
-		debugfs_remove(root_node.dentry);
+	debugfs_remove(root_node.dentry);
 
 	return rc;
 }
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index cb0cf37dac3a..ae5167087845 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -364,7 +364,7 @@ static int __sprint_symbol(char *buffer, unsigned long address,
 	address += symbol_offset;
 	name = kallsyms_lookup(address, &size, &offset, &modname, buffer);
 	if (!name)
-		return sprintf(buffer, "0x%lx", address);
+		return sprintf(buffer, "0x%lx", address - symbol_offset);
 
 	if (name != buffer)
 		strcpy(buffer, name);
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 4b8f0c925884..0b49a0a58102 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -6,6 +6,8 @@
  * Version 2.  See the file COPYING for more details.
  */
 
+#define pr_fmt(fmt)	"kexec: " fmt
+
 #include <linux/capability.h>
 #include <linux/mm.h>
 #include <linux/file.h>
@@ -40,6 +42,9 @@
 #include <asm/io.h>
 #include <asm/sections.h>
 
+#include <crypto/hash.h>
+#include <crypto/sha.h>
+
 /* Per cpu memory for storing cpu states in case of system crash. */
 note_buf_t __percpu *crash_notes;
 
@@ -52,6 +57,15 @@ size_t vmcoreinfo_max_size = sizeof(vmcoreinfo_data);
 /* Flag to indicate we are going to kexec a new kernel */
 bool kexec_in_progress = false;
 
+/*
+ * Declare these symbols weak so that if architecture provides a purgatory,
+ * these will be overridden.
+ */
+char __weak kexec_purgatory[0];
+size_t __weak kexec_purgatory_size = 0;
+
+static int kexec_calculate_store_digests(struct kimage *image);
+
 /* Location of the reserved area for the crash kernel */
 struct resource crashk_res = {
 	.name  = "Crash kernel",
@@ -125,45 +139,27 @@ static struct page *kimage_alloc_page(struct kimage *image,
 				       gfp_t gfp_mask,
 				       unsigned long dest);
 
-static int do_kimage_alloc(struct kimage **rimage, unsigned long entry,
-			   unsigned long nr_segments,
-			   struct kexec_segment __user *segments)
+static int copy_user_segment_list(struct kimage *image,
+				  unsigned long nr_segments,
+				  struct kexec_segment __user *segments)
 {
+	int ret;
 	size_t segment_bytes;
-	struct kimage *image;
-	unsigned long i;
-	int result;
-
-	/* Allocate a controlling structure */
-	result = -ENOMEM;
-	image = kzalloc(sizeof(*image), GFP_KERNEL);
-	if (!image)
-		goto out;
-
-	image->head = 0;
-	image->entry = &image->head;
-	image->last_entry = &image->head;
-	image->control_page = ~0; /* By default this does not apply */
-	image->start = entry;
-	image->type = KEXEC_TYPE_DEFAULT;
-
-	/* Initialize the list of control pages */
-	INIT_LIST_HEAD(&image->control_pages);
-
-	/* Initialize the list of destination pages */
-	INIT_LIST_HEAD(&image->dest_pages);
-
-	/* Initialize the list of unusable pages */
-	INIT_LIST_HEAD(&image->unuseable_pages);
 
 	/* Read in the segments */
 	image->nr_segments = nr_segments;
 	segment_bytes = nr_segments * sizeof(*segments);
-	result = copy_from_user(image->segment, segments, segment_bytes);
-	if (result) {
-		result = -EFAULT;
-		goto out;
-	}
+	ret = copy_from_user(image->segment, segments, segment_bytes);
+	if (ret)
+		ret = -EFAULT;
+
+	return ret;
+}
+
+static int sanity_check_segment_list(struct kimage *image)
+{
+	int result, i;
+	unsigned long nr_segments = image->nr_segments;
 
 	/*
 	 * Verify we have good destination addresses.  The caller is
@@ -185,9 +181,9 @@ static int do_kimage_alloc(struct kimage **rimage, unsigned long entry,
 		mstart = image->segment[i].mem;
 		mend   = mstart + image->segment[i].memsz;
 		if ((mstart & ~PAGE_MASK) || (mend & ~PAGE_MASK))
-			goto out;
+			return result;
 		if (mend >= KEXEC_DESTINATION_MEMORY_LIMIT)
-			goto out;
+			return result;
 	}
 
 	/* Verify our destination addresses do not overlap.
@@ -208,7 +204,7 @@ static int do_kimage_alloc(struct kimage **rimage, unsigned long entry,
 			pend   = pstart + image->segment[j].memsz;
 			/* Do the segments overlap ? */
 			if ((mend > pstart) && (mstart < pend))
-				goto out;
+				return result;
 		}
 	}
 
@@ -220,130 +216,401 @@ static int do_kimage_alloc(struct kimage **rimage, unsigned long entry,
 	result = -EINVAL;
 	for (i = 0; i < nr_segments; i++) {
 		if (image->segment[i].bufsz > image->segment[i].memsz)
-			goto out;
+			return result;
 	}
 
-	result = 0;
-out:
-	if (result == 0)
-		*rimage = image;
-	else
-		kfree(image);
+	/*
+	 * Verify we have good destination addresses.  Normally
+	 * the caller is responsible for making certain we don't
+	 * attempt to load the new image into invalid or reserved
+	 * areas of RAM.  But crash kernels are preloaded into a
+	 * reserved area of ram.  We must ensure the addresses
+	 * are in the reserved area otherwise preloading the
+	 * kernel could corrupt things.
+	 */
 
-	return result;
+	if (image->type == KEXEC_TYPE_CRASH) {
+		result = -EADDRNOTAVAIL;
+		for (i = 0; i < nr_segments; i++) {
+			unsigned long mstart, mend;
+
+			mstart = image->segment[i].mem;
+			mend = mstart + image->segment[i].memsz - 1;
+			/* Ensure we are within the crash kernel limits */
+			if ((mstart < crashk_res.start) ||
+			    (mend > crashk_res.end))
+				return result;
+		}
+	}
 
+	return 0;
+}
+
+static struct kimage *do_kimage_alloc_init(void)
+{
+	struct kimage *image;
+
+	/* Allocate a controlling structure */
+	image = kzalloc(sizeof(*image), GFP_KERNEL);
+	if (!image)
+		return NULL;
+
+	image->head = 0;
+	image->entry = &image->head;
+	image->last_entry = &image->head;
+	image->control_page = ~0; /* By default this does not apply */
+	image->type = KEXEC_TYPE_DEFAULT;
+
+	/* Initialize the list of control pages */
+	INIT_LIST_HEAD(&image->control_pages);
+
+	/* Initialize the list of destination pages */
+	INIT_LIST_HEAD(&image->dest_pages);
+
+	/* Initialize the list of unusable pages */
+	INIT_LIST_HEAD(&image->unusable_pages);
+
+	return image;
 }
 
 static void kimage_free_page_list(struct list_head *list);
 
-static int kimage_normal_alloc(struct kimage **rimage, unsigned long entry,
-				unsigned long nr_segments,
-				struct kexec_segment __user *segments)
+static int kimage_alloc_init(struct kimage **rimage, unsigned long entry,
+			     unsigned long nr_segments,
+			     struct kexec_segment __user *segments,
+			     unsigned long flags)
 {
-	int result;
+	int ret;
 	struct kimage *image;
+	bool kexec_on_panic = flags & KEXEC_ON_CRASH;
+
+	if (kexec_on_panic) {
+		/* Verify we have a valid entry point */
+		if ((entry < crashk_res.start) || (entry > crashk_res.end))
+			return -EADDRNOTAVAIL;
+	}
 
 	/* Allocate and initialize a controlling structure */
-	image = NULL;
-	result = do_kimage_alloc(&image, entry, nr_segments, segments);
-	if (result)
-		goto out;
+	image = do_kimage_alloc_init();
+	if (!image)
+		return -ENOMEM;
+
+	image->start = entry;
+
+	ret = copy_user_segment_list(image, nr_segments, segments);
+	if (ret)
+		goto out_free_image;
+
+	ret = sanity_check_segment_list(image);
+	if (ret)
+		goto out_free_image;
+
+	 /* Enable the special crash kernel control page allocation policy. */
+	if (kexec_on_panic) {
+		image->control_page = crashk_res.start;
+		image->type = KEXEC_TYPE_CRASH;
+	}
 
 	/*
 	 * Find a location for the control code buffer, and add it
 	 * the vector of segments so that it's pages will also be
 	 * counted as destination pages.
 	 */
-	result = -ENOMEM;
+	ret = -ENOMEM;
 	image->control_code_page = kimage_alloc_control_pages(image,
 					   get_order(KEXEC_CONTROL_PAGE_SIZE));
 	if (!image->control_code_page) {
 		pr_err("Could not allocate control_code_buffer\n");
-		goto out_free;
+		goto out_free_image;
 	}
 
-	image->swap_page = kimage_alloc_control_pages(image, 0);
-	if (!image->swap_page) {
-		pr_err("Could not allocate swap buffer\n");
-		goto out_free;
+	if (!kexec_on_panic) {
+		image->swap_page = kimage_alloc_control_pages(image, 0);
+		if (!image->swap_page) {
+			pr_err("Could not allocate swap buffer\n");
+			goto out_free_control_pages;
+		}
 	}
 
 	*rimage = image;
 	return 0;
-
-out_free:
+out_free_control_pages:
 	kimage_free_page_list(&image->control_pages);
+out_free_image:
 	kfree(image);
-out:
-	return result;
+	return ret;
 }
 
-static int kimage_crash_alloc(struct kimage **rimage, unsigned long entry,
-				unsigned long nr_segments,
-				struct kexec_segment __user *segments)
+static int copy_file_from_fd(int fd, void **buf, unsigned long *buf_len)
 {
-	int result;
-	struct kimage *image;
-	unsigned long i;
+	struct fd f = fdget(fd);
+	int ret;
+	struct kstat stat;
+	loff_t pos;
+	ssize_t bytes = 0;
 
-	image = NULL;
-	/* Verify we have a valid entry point */
-	if ((entry < crashk_res.start) || (entry > crashk_res.end)) {
-		result = -EADDRNOTAVAIL;
+	if (!f.file)
+		return -EBADF;
+
+	ret = vfs_getattr(&f.file->f_path, &stat);
+	if (ret)
+		goto out;
+
+	if (stat.size > INT_MAX) {
+		ret = -EFBIG;
 		goto out;
 	}
 
-	/* Allocate and initialize a controlling structure */
-	result = do_kimage_alloc(&image, entry, nr_segments, segments);
-	if (result)
+	/* Don't hand 0 to vmalloc, it whines. */
+	if (stat.size == 0) {
+		ret = -EINVAL;
 		goto out;
+	}
 
-	/* Enable the special crash kernel control page
-	 * allocation policy.
-	 */
-	image->control_page = crashk_res.start;
-	image->type = KEXEC_TYPE_CRASH;
+	*buf = vmalloc(stat.size);
+	if (!*buf) {
+		ret = -ENOMEM;
+		goto out;
+	}
 
-	/*
-	 * Verify we have good destination addresses.  Normally
-	 * the caller is responsible for making certain we don't
-	 * attempt to load the new image into invalid or reserved
-	 * areas of RAM.  But crash kernels are preloaded into a
-	 * reserved area of ram.  We must ensure the addresses
-	 * are in the reserved area otherwise preloading the
-	 * kernel could corrupt things.
-	 */
-	result = -EADDRNOTAVAIL;
-	for (i = 0; i < nr_segments; i++) {
-		unsigned long mstart, mend;
+	pos = 0;
+	while (pos < stat.size) {
+		bytes = kernel_read(f.file, pos, (char *)(*buf) + pos,
+				    stat.size - pos);
+		if (bytes < 0) {
+			vfree(*buf);
+			ret = bytes;
+			goto out;
+		}
 
-		mstart = image->segment[i].mem;
-		mend = mstart + image->segment[i].memsz - 1;
-		/* Ensure we are within the crash kernel limits */
-		if ((mstart < crashk_res.start) || (mend > crashk_res.end))
-			goto out_free;
+		if (bytes == 0)
+			break;
+		pos += bytes;
 	}
 
+	if (pos != stat.size) {
+		ret = -EBADF;
+		vfree(*buf);
+		goto out;
+	}
+
+	*buf_len = pos;
+out:
+	fdput(f);
+	return ret;
+}
+
+/* Architectures can provide this probe function */
+int __weak arch_kexec_kernel_image_probe(struct kimage *image, void *buf,
+					 unsigned long buf_len)
+{
+	return -ENOEXEC;
+}
+
+void * __weak arch_kexec_kernel_image_load(struct kimage *image)
+{
+	return ERR_PTR(-ENOEXEC);
+}
+
+void __weak arch_kimage_file_post_load_cleanup(struct kimage *image)
+{
+}
+
+int __weak arch_kexec_kernel_verify_sig(struct kimage *image, void *buf,
+					unsigned long buf_len)
+{
+	return -EKEYREJECTED;
+}
+
+/* Apply relocations of type RELA */
+int __weak
+arch_kexec_apply_relocations_add(const Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
+				 unsigned int relsec)
+{
+	pr_err("RELA relocation unsupported.\n");
+	return -ENOEXEC;
+}
+
+/* Apply relocations of type REL */
+int __weak
+arch_kexec_apply_relocations(const Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
+			     unsigned int relsec)
+{
+	pr_err("REL relocation unsupported.\n");
+	return -ENOEXEC;
+}
+
+/*
+ * Free up memory used by kernel, initrd, and comand line. This is temporary
+ * memory allocation which is not needed any more after these buffers have
+ * been loaded into separate segments and have been copied elsewhere.
+ */
+static void kimage_file_post_load_cleanup(struct kimage *image)
+{
+	struct purgatory_info *pi = &image->purgatory_info;
+
+	vfree(image->kernel_buf);
+	image->kernel_buf = NULL;
+
+	vfree(image->initrd_buf);
+	image->initrd_buf = NULL;
+
+	kfree(image->cmdline_buf);
+	image->cmdline_buf = NULL;
+
+	vfree(pi->purgatory_buf);
+	pi->purgatory_buf = NULL;
+
+	vfree(pi->sechdrs);
+	pi->sechdrs = NULL;
+
+	/* See if architecture has anything to cleanup post load */
+	arch_kimage_file_post_load_cleanup(image);
+
 	/*
-	 * Find a location for the control code buffer, and add
-	 * the vector of segments so that it's pages will also be
-	 * counted as destination pages.
+	 * Above call should have called into bootloader to free up
+	 * any data stored in kimage->image_loader_data. It should
+	 * be ok now to free it up.
 	 */
-	result = -ENOMEM;
+	kfree(image->image_loader_data);
+	image->image_loader_data = NULL;
+}
+
+/*
+ * In file mode list of segments is prepared by kernel. Copy relevant
+ * data from user space, do error checking, prepare segment list
+ */
+static int
+kimage_file_prepare_segments(struct kimage *image, int kernel_fd, int initrd_fd,
+			     const char __user *cmdline_ptr,
+			     unsigned long cmdline_len, unsigned flags)
+{
+	int ret = 0;
+	void *ldata;
+
+	ret = copy_file_from_fd(kernel_fd, &image->kernel_buf,
+				&image->kernel_buf_len);
+	if (ret)
+		return ret;
+
+	/* Call arch image probe handlers */
+	ret = arch_kexec_kernel_image_probe(image, image->kernel_buf,
+					    image->kernel_buf_len);
+
+	if (ret)
+		goto out;
+
+#ifdef CONFIG_KEXEC_VERIFY_SIG
+	ret = arch_kexec_kernel_verify_sig(image, image->kernel_buf,
+					   image->kernel_buf_len);
+	if (ret) {
+		pr_debug("kernel signature verification failed.\n");
+		goto out;
+	}
+	pr_debug("kernel signature verification successful.\n");
+#endif
+	/* It is possible that there no initramfs is being loaded */
+	if (!(flags & KEXEC_FILE_NO_INITRAMFS)) {
+		ret = copy_file_from_fd(initrd_fd, &image->initrd_buf,
+					&image->initrd_buf_len);
+		if (ret)
+			goto out;
+	}
+
+	if (cmdline_len) {
+		image->cmdline_buf = kzalloc(cmdline_len, GFP_KERNEL);
+		if (!image->cmdline_buf) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
+		ret = copy_from_user(image->cmdline_buf, cmdline_ptr,
+				     cmdline_len);
+		if (ret) {
+			ret = -EFAULT;
+			goto out;
+		}
+
+		image->cmdline_buf_len = cmdline_len;
+
+		/* command line should be a string with last byte null */
+		if (image->cmdline_buf[cmdline_len - 1] != '\0') {
+			ret = -EINVAL;
+			goto out;
+		}
+	}
+
+	/* Call arch image load handlers */
+	ldata = arch_kexec_kernel_image_load(image);
+
+	if (IS_ERR(ldata)) {
+		ret = PTR_ERR(ldata);
+		goto out;
+	}
+
+	image->image_loader_data = ldata;
+out:
+	/* In case of error, free up all allocated memory in this function */
+	if (ret)
+		kimage_file_post_load_cleanup(image);
+	return ret;
+}
+
+static int
+kimage_file_alloc_init(struct kimage **rimage, int kernel_fd,
+		       int initrd_fd, const char __user *cmdline_ptr,
+		       unsigned long cmdline_len, unsigned long flags)
+{
+	int ret;
+	struct kimage *image;
+	bool kexec_on_panic = flags & KEXEC_FILE_ON_CRASH;
+
+	image = do_kimage_alloc_init();
+	if (!image)
+		return -ENOMEM;
+
+	image->file_mode = 1;
+
+	if (kexec_on_panic) {
+		/* Enable special crash kernel control page alloc policy. */
+		image->control_page = crashk_res.start;
+		image->type = KEXEC_TYPE_CRASH;
+	}
+
+	ret = kimage_file_prepare_segments(image, kernel_fd, initrd_fd,
+					   cmdline_ptr, cmdline_len, flags);
+	if (ret)
+		goto out_free_image;
+
+	ret = sanity_check_segment_list(image);
+	if (ret)
+		goto out_free_post_load_bufs;
+
+	ret = -ENOMEM;
 	image->control_code_page = kimage_alloc_control_pages(image,
 					   get_order(KEXEC_CONTROL_PAGE_SIZE));
 	if (!image->control_code_page) {
 		pr_err("Could not allocate control_code_buffer\n");
-		goto out_free;
+		goto out_free_post_load_bufs;
+	}
+
+	if (!kexec_on_panic) {
+		image->swap_page = kimage_alloc_control_pages(image, 0);
+		if (!image->swap_page) {
+			pr_err(KERN_ERR "Could not allocate swap buffer\n");
+			goto out_free_control_pages;
+		}
 	}
 
 	*rimage = image;
 	return 0;
-
-out_free:
+out_free_control_pages:
+	kimage_free_page_list(&image->control_pages);
+out_free_post_load_bufs:
+	kimage_file_post_load_cleanup(image);
+out_free_image:
 	kfree(image);
-out:
-	return result;
+	return ret;
 }
 
 static int kimage_is_destination_range(struct kimage *image,
@@ -609,7 +876,7 @@ static void kimage_free_extra_pages(struct kimage *image)
 	kimage_free_page_list(&image->dest_pages);
 
 	/* Walk through and free any unusable pages I have cached */
-	kimage_free_page_list(&image->unuseable_pages);
+	kimage_free_page_list(&image->unusable_pages);
 
 }
 static void kimage_terminate(struct kimage *image)
@@ -663,6 +930,14 @@ static void kimage_free(struct kimage *image)
 
 	/* Free the kexec control pages... */
 	kimage_free_page_list(&image->control_pages);
+
+	/*
+	 * Free up any temporary buffers allocated. This might hit if
+	 * error occurred much later after buffer allocation.
+	 */
+	if (image->file_mode)
+		kimage_file_post_load_cleanup(image);
+
 	kfree(image);
 }
 
@@ -732,7 +1007,7 @@ static struct page *kimage_alloc_page(struct kimage *image,
 		/* If the page cannot be used file it away */
 		if (page_to_pfn(page) >
 				(KEXEC_SOURCE_MEMORY_LIMIT >> PAGE_SHIFT)) {
-			list_add(&page->lru, &image->unuseable_pages);
+			list_add(&page->lru, &image->unusable_pages);
 			continue;
 		}
 		addr = page_to_pfn(page) << PAGE_SHIFT;
@@ -791,10 +1066,14 @@ static int kimage_load_normal_segment(struct kimage *image,
 	unsigned long maddr;
 	size_t ubytes, mbytes;
 	int result;
-	unsigned char __user *buf;
+	unsigned char __user *buf = NULL;
+	unsigned char *kbuf = NULL;
 
 	result = 0;
-	buf = segment->buf;
+	if (image->file_mode)
+		kbuf = segment->kbuf;
+	else
+		buf = segment->buf;
 	ubytes = segment->bufsz;
 	mbytes = segment->memsz;
 	maddr = segment->mem;
@@ -826,7 +1105,11 @@ static int kimage_load_normal_segment(struct kimage *image,
 				PAGE_SIZE - (maddr & ~PAGE_MASK));
 		uchunk = min(ubytes, mchunk);
 
-		result = copy_from_user(ptr, buf, uchunk);
+		/* For file based kexec, source pages are in kernel memory */
+		if (image->file_mode)
+			memcpy(ptr, kbuf, uchunk);
+		else
+			result = copy_from_user(ptr, buf, uchunk);
 		kunmap(page);
 		if (result) {
 			result = -EFAULT;
@@ -834,7 +1117,10 @@ static int kimage_load_normal_segment(struct kimage *image,
 		}
 		ubytes -= uchunk;
 		maddr  += mchunk;
-		buf    += mchunk;
+		if (image->file_mode)
+			kbuf += mchunk;
+		else
+			buf += mchunk;
 		mbytes -= mchunk;
 	}
 out:
@@ -851,10 +1137,14 @@ static int kimage_load_crash_segment(struct kimage *image,
 	unsigned long maddr;
 	size_t ubytes, mbytes;
 	int result;
-	unsigned char __user *buf;
+	unsigned char __user *buf = NULL;
+	unsigned char *kbuf = NULL;
 
 	result = 0;
-	buf = segment->buf;
+	if (image->file_mode)
+		kbuf = segment->kbuf;
+	else
+		buf = segment->buf;
 	ubytes = segment->bufsz;
 	mbytes = segment->memsz;
 	maddr = segment->mem;
@@ -877,7 +1167,12 @@ static int kimage_load_crash_segment(struct kimage *image,
 			/* Zero the trailing part of the page */
 			memset(ptr + uchunk, 0, mchunk - uchunk);
 		}
-		result = copy_from_user(ptr, buf, uchunk);
+
+		/* For file based kexec, source pages are in kernel memory */
+		if (image->file_mode)
+			memcpy(ptr, kbuf, uchunk);
+		else
+			result = copy_from_user(ptr, buf, uchunk);
 		kexec_flush_icache_page(page);
 		kunmap(page);
 		if (result) {
@@ -886,7 +1181,10 @@ static int kimage_load_crash_segment(struct kimage *image,
 		}
 		ubytes -= uchunk;
 		maddr  += mchunk;
-		buf    += mchunk;
+		if (image->file_mode)
+			kbuf += mchunk;
+		else
+			buf += mchunk;
 		mbytes -= mchunk;
 	}
 out:
@@ -986,16 +1284,16 @@ SYSCALL_DEFINE4(kexec_load, unsigned long, entry, unsigned long, nr_segments,
 
 		/* Loading another kernel to reboot into */
 		if ((flags & KEXEC_ON_CRASH) == 0)
-			result = kimage_normal_alloc(&image, entry,
-							nr_segments, segments);
+			result = kimage_alloc_init(&image, entry, nr_segments,
+						   segments, flags);
 		/* Loading another kernel to switch to if this one crashes */
 		else if (flags & KEXEC_ON_CRASH) {
 			/* Free any current crash dump kernel before
 			 * we corrupt it.
 			 */
 			kimage_free(xchg(&kexec_crash_image, NULL));
-			result = kimage_crash_alloc(&image, entry,
-						     nr_segments, segments);
+			result = kimage_alloc_init(&image, entry, nr_segments,
+						   segments, flags);
 			crash_map_reserved_pages();
 		}
 		if (result)
@@ -1077,6 +1375,82 @@ COMPAT_SYSCALL_DEFINE4(kexec_load, compat_ulong_t, entry,
 }
 #endif
 
+SYSCALL_DEFINE5(kexec_file_load, int, kernel_fd, int, initrd_fd,
+		unsigned long, cmdline_len, const char __user *, cmdline_ptr,
+		unsigned long, flags)
+{
+	int ret = 0, i;
+	struct kimage **dest_image, *image;
+
+	/* We only trust the superuser with rebooting the system. */
+	if (!capable(CAP_SYS_BOOT) || kexec_load_disabled)
+		return -EPERM;
+
+	/* Make sure we have a legal set of flags */
+	if (flags != (flags & KEXEC_FILE_FLAGS))
+		return -EINVAL;
+
+	image = NULL;
+
+	if (!mutex_trylock(&kexec_mutex))
+		return -EBUSY;
+
+	dest_image = &kexec_image;
+	if (flags & KEXEC_FILE_ON_CRASH)
+		dest_image = &kexec_crash_image;
+
+	if (flags & KEXEC_FILE_UNLOAD)
+		goto exchange;
+
+	/*
+	 * In case of crash, new kernel gets loaded in reserved region. It is
+	 * same memory where old crash kernel might be loaded. Free any
+	 * current crash dump kernel before we corrupt it.
+	 */
+	if (flags & KEXEC_FILE_ON_CRASH)
+		kimage_free(xchg(&kexec_crash_image, NULL));
+
+	ret = kimage_file_alloc_init(&image, kernel_fd, initrd_fd, cmdline_ptr,
+				     cmdline_len, flags);
+	if (ret)
+		goto out;
+
+	ret = machine_kexec_prepare(image);
+	if (ret)
+		goto out;
+
+	ret = kexec_calculate_store_digests(image);
+	if (ret)
+		goto out;
+
+	for (i = 0; i < image->nr_segments; i++) {
+		struct kexec_segment *ksegment;
+
+		ksegment = &image->segment[i];
+		pr_debug("Loading segment %d: buf=0x%p bufsz=0x%zx mem=0x%lx memsz=0x%zx\n",
+			 i, ksegment->buf, ksegment->bufsz, ksegment->mem,
+			 ksegment->memsz);
+
+		ret = kimage_load_segment(image, &image->segment[i]);
+		if (ret)
+			goto out;
+	}
+
+	kimage_terminate(image);
+
+	/*
+	 * Free up any temporary buffers allocated which are not needed
+	 * after image has been loaded
+	 */
+	kimage_file_post_load_cleanup(image);
+exchange:
+	image = xchg(dest_image, image);
+out:
+	mutex_unlock(&kexec_mutex);
+	kimage_free(image);
+	return ret;
+}
+
 void crash_kexec(struct pt_regs *regs)
 {
 	/* Take the kexec_mutex here to prevent sys_kexec_load
@@ -1632,6 +2006,683 @@ static int __init crash_save_vmcoreinfo_init(void)
 
 subsys_initcall(crash_save_vmcoreinfo_init);
 
+static int __kexec_add_segment(struct kimage *image, char *buf,
+			       unsigned long bufsz, unsigned long mem,
+			       unsigned long memsz)
+{
+	struct kexec_segment *ksegment;
+
+	ksegment = &image->segment[image->nr_segments];
+	ksegment->kbuf = buf;
+	ksegment->bufsz = bufsz;
+	ksegment->mem = mem;
+	ksegment->memsz = memsz;
+	image->nr_segments++;
+
+	return 0;
+}
+
+static int locate_mem_hole_top_down(unsigned long start, unsigned long end,
+				    struct kexec_buf *kbuf)
+{
+	struct kimage *image = kbuf->image;
+	unsigned long temp_start, temp_end;
+
+	temp_end = min(end, kbuf->buf_max);
+	temp_start = temp_end - kbuf->memsz;
+
+	do {
+		/* align down start */
+		temp_start = temp_start & (~(kbuf->buf_align - 1));
+
+		if (temp_start < start || temp_start < kbuf->buf_min)
+			return 0;
+
+		temp_end = temp_start + kbuf->memsz - 1;
+
+		/*
+		 * Make sure this does not conflict with any of existing
+		 * segments
+		 */
+		if (kimage_is_destination_range(image, temp_start, temp_end)) {
+			temp_start = temp_start - PAGE_SIZE;
+			continue;
+		}
+
+		/* We found a suitable memory range */
+		break;
+	} while (1);
+
+	/* If we are here, we found a suitable memory range */
+	__kexec_add_segment(image, kbuf->buffer, kbuf->bufsz, temp_start,
+			    kbuf->memsz);
+
+	/* Success, stop navigating through remaining System RAM ranges */
+	return 1;
+}
+
+static int locate_mem_hole_bottom_up(unsigned long start, unsigned long end,
+				     struct kexec_buf *kbuf)
+{
+	struct kimage *image = kbuf->image;
+	unsigned long temp_start, temp_end;
+
+	temp_start = max(start, kbuf->buf_min);
+
+	do {
+		temp_start = ALIGN(temp_start, kbuf->buf_align);
+		temp_end = temp_start + kbuf->memsz - 1;
+
+		if (temp_end > end || temp_end > kbuf->buf_max)
+			return 0;
+		/*
+		 * Make sure this does not conflict with any of existing
+		 * segments
+		 */
+		if (kimage_is_destination_range(image, temp_start, temp_end)) {
+			temp_start = temp_start + PAGE_SIZE;
+			continue;
+		}
+
+		/* We found a suitable memory range */
+		break;
+	} while (1);
+
+	/* If we are here, we found a suitable memory range */
+	__kexec_add_segment(image, kbuf->buffer, kbuf->bufsz, temp_start,
+			    kbuf->memsz);
+
+	/* Success, stop navigating through remaining System RAM ranges */
+	return 1;
+}
+
+static int locate_mem_hole_callback(u64 start, u64 end, void *arg)
+{
+	struct kexec_buf *kbuf = (struct kexec_buf *)arg;
+	unsigned long sz = end - start + 1;
+
+	/* Returning 0 will take to next memory range */
+	if (sz < kbuf->memsz)
+		return 0;
+
+	if (end < kbuf->buf_min || start > kbuf->buf_max)
+		return 0;
+
+	/*
+	 * Allocate memory top down with-in ram range. Otherwise bottom up
+	 * allocation.
+	 */
+	if (kbuf->top_down)
+		return locate_mem_hole_top_down(start, end, kbuf);
+	return locate_mem_hole_bottom_up(start, end, kbuf);
+}
+
+/*
+ * Helper function for placing a buffer in a kexec segment. This assumes
+ * that kexec_mutex is held.
+ */
+int kexec_add_buffer(struct kimage *image, char *buffer, unsigned long bufsz,
+		     unsigned long memsz, unsigned long buf_align,
+		     unsigned long buf_min, unsigned long buf_max,
+		     bool top_down, unsigned long *load_addr)
+{
+
+	struct kexec_segment *ksegment;
+	struct kexec_buf buf, *kbuf;
+	int ret;
+
+	/* Currently adding segment this way is allowed only in file mode */
+	if (!image->file_mode)
+		return -EINVAL;
+
+	if (image->nr_segments >= KEXEC_SEGMENT_MAX)
+		return -EINVAL;
+
+	/*
+	 * Make sure we are not trying to add buffer after allocating
+	 * control pages. All segments need to be placed first before
+	 * any control pages are allocated. As control page allocation
+	 * logic goes through list of segments to make sure there are
+	 * no destination overlaps.
+	 */
+	if (!list_empty(&image->control_pages)) {
+		WARN_ON(1);
+		return -EINVAL;
+	}
+
+	memset(&buf, 0, sizeof(struct kexec_buf));
+	kbuf = &buf;
+	kbuf->image = image;
+	kbuf->buffer = buffer;
+	kbuf->bufsz = bufsz;
+
+	kbuf->memsz = ALIGN(memsz, PAGE_SIZE);
+	kbuf->buf_align = max(buf_align, PAGE_SIZE);
+	kbuf->buf_min = buf_min;
+	kbuf->buf_max = buf_max;
+	kbuf->top_down = top_down;
+
+	/* Walk the RAM ranges and allocate a suitable range for the buffer */
+	if (image->type == KEXEC_TYPE_CRASH)
+		ret = walk_iomem_res("Crash kernel",
+				     IORESOURCE_MEM | IORESOURCE_BUSY,
+				     crashk_res.start, crashk_res.end, kbuf,
+				     locate_mem_hole_callback);
+	else
+		ret = walk_system_ram_res(0, -1, kbuf,
+					  locate_mem_hole_callback);
+	if (ret != 1) {
+		/* A suitable memory range could not be found for buffer */
+		return -EADDRNOTAVAIL;
+	}
+
+	/* Found a suitable memory range */
+	ksegment = &image->segment[image->nr_segments - 1];
+	*load_addr = ksegment->mem;
+	return 0;
+}
+
+/* Calculate and store the digest of segments */
+static int kexec_calculate_store_digests(struct kimage *image)
+{
+	struct crypto_shash *tfm;
+	struct shash_desc *desc;
+	int ret = 0, i, j, zero_buf_sz, sha_region_sz;
+	size_t desc_size, nullsz;
+	char *digest;
+	void *zero_buf;
+	struct kexec_sha_region *sha_regions;
+	struct purgatory_info *pi = &image->purgatory_info;
+
+	zero_buf = __va(page_to_pfn(ZERO_PAGE(0)) << PAGE_SHIFT);
+	zero_buf_sz = PAGE_SIZE;
+
+	tfm = crypto_alloc_shash("sha256", 0, 0);
+	if (IS_ERR(tfm)) {
+		ret = PTR_ERR(tfm);
+		goto out;
+	}
+
+	desc_size = crypto_shash_descsize(tfm) + sizeof(*desc);
+	desc = kzalloc(desc_size, GFP_KERNEL);
+	if (!desc) {
+		ret = -ENOMEM;
+		goto out_free_tfm;
+	}
+
+	sha_region_sz = KEXEC_SEGMENT_MAX * sizeof(struct kexec_sha_region);
+	sha_regions = vzalloc(sha_region_sz);
+	if (!sha_regions)
+		goto out_free_desc;
+
+	desc->tfm   = tfm;
+	desc->flags = 0;
+
+	ret = crypto_shash_init(desc);
+	if (ret < 0)
+		goto out_free_sha_regions;
+
+	digest = kzalloc(SHA256_DIGEST_SIZE, GFP_KERNEL);
+	if (!digest) {
+		ret = -ENOMEM;
+		goto out_free_sha_regions;
+	}
+
+	for (j = i = 0; i < image->nr_segments; i++) {
+		struct kexec_segment *ksegment;
+
+		ksegment = &image->segment[i];
+		/*
+		 * Skip purgatory as it will be modified once we put digest
+		 * info in purgatory.
+		 */
+		if (ksegment->kbuf == pi->purgatory_buf)
+			continue;
+
+		ret = crypto_shash_update(desc, ksegment->kbuf,
+					  ksegment->bufsz);
+		if (ret)
+			break;
+
+		/*
+		 * Assume rest of the buffer is filled with zero and
+		 * update digest accordingly.
+		 */
+		nullsz = ksegment->memsz - ksegment->bufsz;
+		while (nullsz) {
+			unsigned long bytes = nullsz;
+
+			if (bytes > zero_buf_sz)
+				bytes = zero_buf_sz;
+			ret = crypto_shash_update(desc, zero_buf, bytes);
+			if (ret)
+				break;
+			nullsz -= bytes;
+		}
+
+		if (ret)
+			break;
+
+		sha_regions[j].start = ksegment->mem;
+		sha_regions[j].len = ksegment->memsz;
+		j++;
+	}
+
+	if (!ret) {
+		ret = crypto_shash_final(desc, digest);
+		if (ret)
+			goto out_free_digest;
+		ret = kexec_purgatory_get_set_symbol(image, "sha_regions",
+						sha_regions, sha_region_sz, 0);
+		if (ret)
+			goto out_free_digest;
+
+		ret = kexec_purgatory_get_set_symbol(image, "sha256_digest",
+						digest, SHA256_DIGEST_SIZE, 0);
+		if (ret)
+			goto out_free_digest;
+	}
+
+out_free_digest:
+	kfree(digest);
+out_free_sha_regions:
+	vfree(sha_regions);
+out_free_desc:
+	kfree(desc);
+out_free_tfm:
+	kfree(tfm);
+out:
+	return ret;
+}
+
+/* Actually load purgatory. Lot of code taken from kexec-tools */
+static int __kexec_load_purgatory(struct kimage *image, unsigned long min,
+				  unsigned long max, int top_down)
+{
+	struct purgatory_info *pi = &image->purgatory_info;
+	unsigned long align, buf_align, bss_align, buf_sz, bss_sz, bss_pad;
+	unsigned long memsz, entry, load_addr, curr_load_addr, bss_addr, offset;
+	unsigned char *buf_addr, *src;
+	int i, ret = 0, entry_sidx = -1;
+	const Elf_Shdr *sechdrs_c;
+	Elf_Shdr *sechdrs = NULL;
+	void *purgatory_buf = NULL;
+
+	/*
+	 * sechdrs_c points to section headers in purgatory and are read
+	 * only. No modifications allowed.
+	 */
+	sechdrs_c = (void *)pi->ehdr + pi->ehdr->e_shoff;
+
+	/*
+	 * We can not modify sechdrs_c[] and its fields. It is read only.
+	 * Copy it over to a local copy where one can store some temporary
+	 * data and free it at the end. We need to modify ->sh_addr and
+	 * ->sh_offset fields to keep track of permanent and temporary
+	 * locations of sections.
+	 */
+	sechdrs = vzalloc(pi->ehdr->e_shnum * sizeof(Elf_Shdr));
+	if (!sechdrs)
+		return -ENOMEM;
+
+	memcpy(sechdrs, sechdrs_c, pi->ehdr->e_shnum * sizeof(Elf_Shdr));
+
+	/*
+	 * We seem to have multiple copies of sections. First copy is which
+	 * is embedded in kernel in read only section. Some of these sections
+	 * will be copied to a temporary buffer and relocated. And these
+	 * sections will finally be copied to their final destination at
+	 * segment load time.
+	 *
+	 * Use ->sh_offset to reflect section address in memory. It will
+	 * point to original read only copy if section is not allocatable.
+	 * Otherwise it will point to temporary copy which will be relocated.
+	 *
+	 * Use ->sh_addr to contain final address of the section where it
+	 * will go during execution time.
+	 */
+	for (i = 0; i < pi->ehdr->e_shnum; i++) {
+		if (sechdrs[i].sh_type == SHT_NOBITS)
+			continue;
+
+		sechdrs[i].sh_offset = (unsigned long)pi->ehdr +
+						sechdrs[i].sh_offset;
+	}
+
+	/*
+	 * Identify entry point section and make entry relative to section
+	 * start.
+	 */
+	entry = pi->ehdr->e_entry;
+	for (i = 0; i < pi->ehdr->e_shnum; i++) {
+		if (!(sechdrs[i].sh_flags & SHF_ALLOC))
+			continue;
+
+		if (!(sechdrs[i].sh_flags & SHF_EXECINSTR))
+			continue;
+
+		/* Make entry section relative */
+		if (sechdrs[i].sh_addr <= pi->ehdr->e_entry &&
+		    ((sechdrs[i].sh_addr + sechdrs[i].sh_size) >
+		     pi->ehdr->e_entry)) {
+			entry_sidx = i;
+			entry -= sechdrs[i].sh_addr;
+			break;
+		}
+	}
+
+	/* Determine how much memory is needed to load relocatable object. */
+	buf_align = 1;
+	bss_align = 1;
+	buf_sz = 0;
+	bss_sz = 0;
+
+	for (i = 0; i < pi->ehdr->e_shnum; i++) {
+		if (!(sechdrs[i].sh_flags & SHF_ALLOC))
+			continue;
+
+		align = sechdrs[i].sh_addralign;
+		if (sechdrs[i].sh_type != SHT_NOBITS) {
+			if (buf_align < align)
+				buf_align = align;
+			buf_sz = ALIGN(buf_sz, align);
+			buf_sz += sechdrs[i].sh_size;
+		} else {
+			/* bss section */
+			if (bss_align < align)
+				bss_align = align;
+			bss_sz = ALIGN(bss_sz, align);
+			bss_sz += sechdrs[i].sh_size;
+		}
+	}
+
+	/* Determine the bss padding required to align bss properly */
+	bss_pad = 0;
+	if (buf_sz & (bss_align - 1))
+		bss_pad = bss_align - (buf_sz & (bss_align - 1));
+
+	memsz = buf_sz + bss_pad + bss_sz;
+
+	/* Allocate buffer for purgatory */
+	purgatory_buf = vzalloc(buf_sz);
+	if (!purgatory_buf) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	if (buf_align < bss_align)
+		buf_align = bss_align;
+
+	/* Add buffer to segment list */
+	ret = kexec_add_buffer(image, purgatory_buf, buf_sz, memsz,
+				buf_align, min, max, top_down,
+				&pi->purgatory_load_addr);
+	if (ret)
+		goto out;
+
+	/* Load SHF_ALLOC sections */
+	buf_addr = purgatory_buf;
+	load_addr = curr_load_addr = pi->purgatory_load_addr;
+	bss_addr = load_addr + buf_sz + bss_pad;
+
+	for (i = 0; i < pi->ehdr->e_shnum; i++) {
+		if (!(sechdrs[i].sh_flags & SHF_ALLOC))
+			continue;
+
+		align = sechdrs[i].sh_addralign;
+		if (sechdrs[i].sh_type != SHT_NOBITS) {
+			curr_load_addr = ALIGN(curr_load_addr, align);
+			offset = curr_load_addr - load_addr;
+			/* We already modifed ->sh_offset to keep src addr */
+			src = (char *) sechdrs[i].sh_offset;
+			memcpy(buf_addr + offset, src, sechdrs[i].sh_size);
+
+			/* Store load address and source address of section */
+			sechdrs[i].sh_addr = curr_load_addr;
+
+			/*
+			 * This section got copied to temporary buffer. Update
+			 * ->sh_offset accordingly.
+			 */
+			sechdrs[i].sh_offset = (unsigned long)(buf_addr + offset);
+
+			/* Advance to the next address */
+			curr_load_addr += sechdrs[i].sh_size;
+		} else {
+			bss_addr = ALIGN(bss_addr, align);
+			sechdrs[i].sh_addr = bss_addr;
+			bss_addr += sechdrs[i].sh_size;
+		}
+	}
+
+	/* Update entry point based on load address of text section */
+	if (entry_sidx >= 0)
+		entry += sechdrs[entry_sidx].sh_addr;
+
+	/* Make kernel jump to purgatory after shutdown */
+	image->start = entry;
+
+	/* Used later to get/set symbol values */
+	pi->sechdrs = sechdrs;
+
+	/*
+	 * Used later to identify which section is purgatory and skip it
+	 * from checksumming.
+	 */
+	pi->purgatory_buf = purgatory_buf;
+	return ret;
+out:
+	vfree(sechdrs);
+	vfree(purgatory_buf);
+	return ret;
+}
+
+static int kexec_apply_relocations(struct kimage *image)
+{
+	int i, ret;
+	struct purgatory_info *pi = &image->purgatory_info;
+	Elf_Shdr *sechdrs = pi->sechdrs;
+
+	/* Apply relocations */
+	for (i = 0; i < pi->ehdr->e_shnum; i++) {
+		Elf_Shdr *section, *symtab;
+
+		if (sechdrs[i].sh_type != SHT_RELA &&
+		    sechdrs[i].sh_type != SHT_REL)
+			continue;
+
+		/*
+		 * For section of type SHT_RELA/SHT_REL,
+		 * ->sh_link contains section header index of associated
+		 * symbol table. And ->sh_info contains section header
+		 * index of section to which relocations apply.
+		 */
+		if (sechdrs[i].sh_info >= pi->ehdr->e_shnum ||
+		    sechdrs[i].sh_link >= pi->ehdr->e_shnum)
+			return -ENOEXEC;
+
+		section = &sechdrs[sechdrs[i].sh_info];
+		symtab = &sechdrs[sechdrs[i].sh_link];
+
+		if (!(section->sh_flags & SHF_ALLOC))
+			continue;
+
+		/*
+		 * symtab->sh_link contain section header index of associated
+		 * string table.
+		 */
+		if (symtab->sh_link >= pi->ehdr->e_shnum)
+			/* Invalid section number? */
+			continue;
+
+		/*
+		 * Respective archicture needs to provide support for applying
+		 * relocations of type SHT_RELA/SHT_REL.
+		 */
+		if (sechdrs[i].sh_type == SHT_RELA)
+			ret = arch_kexec_apply_relocations_add(pi->ehdr,
+							       sechdrs, i);
+		else if (sechdrs[i].sh_type == SHT_REL)
+			ret = arch_kexec_apply_relocations(pi->ehdr,
+							   sechdrs, i);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+/* Load relocatable purgatory object and relocate it appropriately */
+int kexec_load_purgatory(struct kimage *image, unsigned long min,
+			 unsigned long max, int top_down,
+			 unsigned long *load_addr)
+{
+	struct purgatory_info *pi = &image->purgatory_info;
+	int ret;
+
+	if (kexec_purgatory_size <= 0)
+		return -EINVAL;
+
+	if (kexec_purgatory_size < sizeof(Elf_Ehdr))
+		return -ENOEXEC;
+
+	pi->ehdr = (Elf_Ehdr *)kexec_purgatory;
+
+	if (memcmp(pi->ehdr->e_ident, ELFMAG, SELFMAG) != 0
+	    || pi->ehdr->e_type != ET_REL
+	    || !elf_check_arch(pi->ehdr)
+	    || pi->ehdr->e_shentsize != sizeof(Elf_Shdr))
+		return -ENOEXEC;
+
+	if (pi->ehdr->e_shoff >= kexec_purgatory_size
+	    || (pi->ehdr->e_shnum * sizeof(Elf_Shdr) >
+	    kexec_purgatory_size - pi->ehdr->e_shoff))
+		return -ENOEXEC;
+
+	ret = __kexec_load_purgatory(image, min, max, top_down);
+	if (ret)
+		return ret;
+
+	ret = kexec_apply_relocations(image);
+	if (ret)
+		goto out;
+
+	*load_addr = pi->purgatory_load_addr;
+	return 0;
+out:
+	vfree(pi->sechdrs);
+	vfree(pi->purgatory_buf);
+	return ret;
+}
+
+static Elf_Sym *kexec_purgatory_find_symbol(struct purgatory_info *pi,
+					    const char *name)
+{
+	Elf_Sym *syms;
+	Elf_Shdr *sechdrs;
+	Elf_Ehdr *ehdr;
+	int i, k;
+	const char *strtab;
+
+	if (!pi->sechdrs || !pi->ehdr)
+		return NULL;
+
+	sechdrs = pi->sechdrs;
+	ehdr = pi->ehdr;
+
+	for (i = 0; i < ehdr->e_shnum; i++) {
+		if (sechdrs[i].sh_type != SHT_SYMTAB)
+			continue;
+
+		if (sechdrs[i].sh_link >= ehdr->e_shnum)
+			/* Invalid strtab section number */
+			continue;
+		strtab = (char *)sechdrs[sechdrs[i].sh_link].sh_offset;
+		syms = (Elf_Sym *)sechdrs[i].sh_offset;
+
+		/* Go through symbols for a match */
+		for (k = 0; k < sechdrs[i].sh_size/sizeof(Elf_Sym); k++) {
+			if (ELF_ST_BIND(syms[k].st_info) != STB_GLOBAL)
+				continue;
+
+			if (strcmp(strtab + syms[k].st_name, name) != 0)
+				continue;
+
+			if (syms[k].st_shndx == SHN_UNDEF ||
+			    syms[k].st_shndx >= ehdr->e_shnum) {
+				pr_debug("Symbol: %s has bad section index %d.\n",
+						name, syms[k].st_shndx);
+				return NULL;
+			}
+
+			/* Found the symbol we are looking for */
+			return &syms[k];
+		}
+	}
+
+	return NULL;
+}
+
+void *kexec_purgatory_get_symbol_addr(struct kimage *image, const char *name)
+{
+	struct purgatory_info *pi = &image->purgatory_info;
+	Elf_Sym *sym;
+	Elf_Shdr *sechdr;
+
+	sym = kexec_purgatory_find_symbol(pi, name);
+	if (!sym)
+		return ERR_PTR(-EINVAL);
+
+	sechdr = &pi->sechdrs[sym->st_shndx];
+
+	/*
+	 * Returns the address where symbol will finally be loaded after
+	 * kexec_load_segment()
+	 */
+	return (void *)(sechdr->sh_addr + sym->st_value);
+}
+
+/*
+ * Get or set value of a symbol. If "get_value" is true, symbol value is
+ * returned in buf otherwise symbol value is set based on value in buf.
+ */
+int kexec_purgatory_get_set_symbol(struct kimage *image, const char *name,
+				   void *buf, unsigned int size, bool get_value)
+{
+	Elf_Sym *sym;
+	Elf_Shdr *sechdrs;
+	struct purgatory_info *pi = &image->purgatory_info;
+	char *sym_buf;
+
+	sym = kexec_purgatory_find_symbol(pi, name);
+	if (!sym)
+		return -EINVAL;
+
+	if (sym->st_size != size) {
+		pr_err("symbol %s size mismatch: expected %lu actual %u\n",
+		       name, (unsigned long)sym->st_size, size);
+		return -EINVAL;
+	}
+
+	sechdrs = pi->sechdrs;
+
+	if (sechdrs[sym->st_shndx].sh_type == SHT_NOBITS) {
+		pr_err("symbol %s is in a bss section. Cannot %s\n", name,
+		       get_value ? "get" : "set");
+		return -EINVAL;
+	}
+
+	sym_buf = (unsigned char *)sechdrs[sym->st_shndx].sh_offset +
+					sym->st_value;
+
+	if (get_value)
+		memcpy((void *)buf, sym_buf, size);
+	else
+		memcpy((void *)sym_buf, buf, size);
+
+	return 0;
+}
+
 /*
  * Move into place and start executing a preloaded standalone
  * executable.  If nothing was preloaded return an error.
diff --git a/kernel/panic.c b/kernel/panic.c
index 62e16cef9cc2..d09dc5c32c67 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -224,6 +224,7 @@ static const struct tnt tnts[] = {
 	{ TAINT_FIRMWARE_WORKAROUND,	'I', ' ' },
 	{ TAINT_OOT_MODULE,		'O', ' ' },
 	{ TAINT_UNSIGNED_MODULE,	'E', ' ' },
+	{ TAINT_SOFTLOCKUP,		'L', ' ' },
 };
 
 /**
diff --git a/kernel/resource.c b/kernel/resource.c
index 3c2237ac32db..da14b8d09296 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -59,10 +59,12 @@ static DEFINE_RWLOCK(resource_lock);
 static struct resource *bootmem_resource_free;
 static DEFINE_SPINLOCK(bootmem_resource_lock);
 
-static void *r_next(struct seq_file *m, void *v, loff_t *pos)
+static struct resource *next_resource(struct resource *p, bool sibling_only)
 {
-	struct resource *p = v;
-	(*pos)++;
+	/* Caller wants to traverse through siblings only */
+	if (sibling_only)
+		return p->sibling;
+
 	if (p->child)
 		return p->child;
 	while (!p->sibling && p->parent)
@@ -70,6 +72,13 @@ static void *r_next(struct seq_file *m, void *v, loff_t *pos)
 	return p->sibling;
 }
 
+static void *r_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	struct resource *p = v;
+	(*pos)++;
+	return (void *)next_resource(p, false);
+}
+
 #ifdef CONFIG_PROC_FS
 
 enum { MAX_IORES_LEVEL = 5 };
@@ -322,16 +331,19 @@ int release_resource(struct resource *old)
 
 EXPORT_SYMBOL(release_resource);
 
-#if !defined(CONFIG_ARCH_HAS_WALK_MEMORY)
 /*
- * Finds the lowest memory reosurce exists within [res->start.res->end)
+ * Finds the lowest iomem reosurce exists with-in [res->start.res->end)
  * the caller must specify res->start, res->end, res->flags and "name".
  * If found, returns 0, res is overwritten, if not found, returns -1.
+ * This walks through whole tree and not just first level children
+ * until and unless first_level_children_only is true.
  */
-static int find_next_system_ram(struct resource *res, char *name)
+static int find_next_iomem_res(struct resource *res, char *name,
+			       bool first_level_children_only)
 {
 	resource_size_t start, end;
 	struct resource *p;
+	bool sibling_only = false;
 
 	BUG_ON(!res);
 
@@ -340,8 +352,14 @@ static int find_next_system_ram(struct resource *res, char *name)
 	BUG_ON(start >= end);
 
 	read_lock(&resource_lock);
-	for (p = iomem_resource.child; p ; p = p->sibling) {
-		/* system ram is just marked as IORESOURCE_MEM */
+
+	if (first_level_children_only) {
+		p = iomem_resource.child;
+		sibling_only = true;
+	} else
+		p = &iomem_resource;
+
+	while ((p = next_resource(p, sibling_only))) {
 		if (p->flags != res->flags)
 			continue;
 		if (name && strcmp(p->name, name))
@@ -353,6 +371,7 @@ static int find_next_system_ram(struct resource *res, char *name)
 		if ((p->end >= start) && (p->start < end))
 			break;
 	}
+
 	read_unlock(&resource_lock);
 	if (!p)
 		return -1;
@@ -365,6 +384,70 @@ static int find_next_system_ram(struct resource *res, char *name)
 }
 
 /*
+ * Walks through iomem resources and calls func() with matching resource
+ * ranges. This walks through whole tree and not just first level children.
+ * All the memory ranges which overlap start,end and also match flags and
+ * name are valid candidates.
+ *
+ * @name: name of resource
+ * @flags: resource flags
+ * @start: start addr
+ * @end: end addr
+ */
+int walk_iomem_res(char *name, unsigned long flags, u64 start, u64 end,
+		void *arg, int (*func)(u64, u64, void *))
+{
+	struct resource res;
+	u64 orig_end;
+	int ret = -1;
+
+	res.start = start;
+	res.end = end;
+	res.flags = flags;
+	orig_end = res.end;
+	while ((res.start < res.end) &&
+		(!find_next_iomem_res(&res, name, false))) {
+		ret = (*func)(res.start, res.end, arg);
+		if (ret)
+			break;
+		res.start = res.end + 1;
+		res.end = orig_end;
+	}
+	return ret;
+}
+
+/*
+ * This function calls callback against all memory range of "System RAM"
+ * which are marked as IORESOURCE_MEM and IORESOUCE_BUSY.
+ * Now, this function is only for "System RAM". This function deals with
+ * full ranges and not pfn. If resources are not pfn aligned, dealing
+ * with pfn can truncate ranges.
+ */
+int walk_system_ram_res(u64 start, u64 end, void *arg,
+				int (*func)(u64, u64, void *))
+{
+	struct resource res;
+	u64 orig_end;
+	int ret = -1;
+
+	res.start = start;
+	res.end = end;
+	res.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+	orig_end = res.end;
+	while ((res.start < res.end) &&
+		(!find_next_iomem_res(&res, "System RAM", true))) {
+		ret = (*func)(res.start, res.end, arg);
+		if (ret)
+			break;
+		res.start = res.end + 1;
+		res.end = orig_end;
+	}
+	return ret;
+}
+
+#if !defined(CONFIG_ARCH_HAS_WALK_MEMORY)
+
+/*
  * This function calls callback against all memory range of "System RAM"
  * which are marked as IORESOURCE_MEM and IORESOUCE_BUSY.
  * Now, this function is only for "System RAM".
@@ -382,7 +465,7 @@ int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
 	res.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
 	orig_end = res.end;
 	while ((res.start < res.end) &&
-		(find_next_system_ram(&res, "System RAM") >= 0)) {
+		(find_next_iomem_res(&res, "System RAM", true) >= 0)) {
 		pfn = (res.start + PAGE_SIZE - 1) >> PAGE_SHIFT;
 		end_pfn = (res.end + 1) >> PAGE_SHIFT;
 		if (end_pfn > pfn)
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 2904a2105914..391d4ddb6f4b 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -25,6 +25,7 @@ cond_syscall(sys_swapon);
 cond_syscall(sys_swapoff);
 cond_syscall(sys_kexec_load);
 cond_syscall(compat_sys_kexec_load);
+cond_syscall(sys_kexec_file_load);
 cond_syscall(sys_init_module);
 cond_syscall(sys_finit_module);
 cond_syscall(sys_delete_module);
@@ -197,6 +198,7 @@ cond_syscall(compat_sys_timerfd_settime);
 cond_syscall(compat_sys_timerfd_gettime);
 cond_syscall(sys_eventfd);
 cond_syscall(sys_eventfd2);
+cond_syscall(sys_memfd_create);
 
 /* performance counters: */
 cond_syscall(sys_perf_event_open);
diff --git a/kernel/test_kprobes.c b/kernel/test_kprobes.c
index 12d6ebbfdd83..0dbab6d1acb4 100644
--- a/kernel/test_kprobes.c
+++ b/kernel/test_kprobes.c
@@ -14,6 +14,8 @@
  * the GNU General Public License for more details.
  */
 
+#define pr_fmt(fmt) "Kprobe smoke test: " fmt
+
 #include <linux/kernel.h>
 #include <linux/kprobes.h>
 #include <linux/random.h>
@@ -41,8 +43,7 @@ static void kp_post_handler(struct kprobe *p, struct pt_regs *regs,
 {
 	if (preh_val != (rand1 / div_factor)) {
 		handler_errors++;
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"incorrect value in post_handler\n");
+		pr_err("incorrect value in post_handler\n");
 	}
 	posth_val = preh_val + div_factor;
 }
@@ -59,8 +60,7 @@ static int test_kprobe(void)
 
 	ret = register_kprobe(&kp);
 	if (ret < 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"register_kprobe returned %d\n", ret);
+		pr_err("register_kprobe returned %d\n", ret);
 		return ret;
 	}
 
@@ -68,14 +68,12 @@ static int test_kprobe(void)
 	unregister_kprobe(&kp);
 
 	if (preh_val == 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"kprobe pre_handler not called\n");
+		pr_err("kprobe pre_handler not called\n");
 		handler_errors++;
 	}
 
 	if (posth_val == 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"kprobe post_handler not called\n");
+		pr_err("kprobe post_handler not called\n");
 		handler_errors++;
 	}
 
@@ -98,8 +96,7 @@ static void kp_post_handler2(struct kprobe *p, struct pt_regs *regs,
 {
 	if (preh_val != (rand1 / div_factor) + 1) {
 		handler_errors++;
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"incorrect value in post_handler2\n");
+		pr_err("incorrect value in post_handler2\n");
 	}
 	posth_val = preh_val + div_factor;
 }
@@ -120,8 +117,7 @@ static int test_kprobes(void)
 	kp.flags = 0;
 	ret = register_kprobes(kps, 2);
 	if (ret < 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"register_kprobes returned %d\n", ret);
+		pr_err("register_kprobes returned %d\n", ret);
 		return ret;
 	}
 
@@ -130,14 +126,12 @@ static int test_kprobes(void)
 	ret = target(rand1);
 
 	if (preh_val == 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"kprobe pre_handler not called\n");
+		pr_err("kprobe pre_handler not called\n");
 		handler_errors++;
 	}
 
 	if (posth_val == 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"kprobe post_handler not called\n");
+		pr_err("kprobe post_handler not called\n");
 		handler_errors++;
 	}
 
@@ -146,14 +140,12 @@ static int test_kprobes(void)
 	ret = target2(rand1);
 
 	if (preh_val == 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"kprobe pre_handler2 not called\n");
+		pr_err("kprobe pre_handler2 not called\n");
 		handler_errors++;
 	}
 
 	if (posth_val == 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"kprobe post_handler2 not called\n");
+		pr_err("kprobe post_handler2 not called\n");
 		handler_errors++;
 	}
 
@@ -166,8 +158,7 @@ static u32 j_kprobe_target(u32 value)
 {
 	if (value != rand1) {
 		handler_errors++;
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"incorrect value in jprobe handler\n");
+		pr_err("incorrect value in jprobe handler\n");
 	}
 
 	jph_val = rand1;
@@ -186,16 +177,14 @@ static int test_jprobe(void)
 
 	ret = register_jprobe(&jp);
 	if (ret < 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"register_jprobe returned %d\n", ret);
+		pr_err("register_jprobe returned %d\n", ret);
 		return ret;
 	}
 
 	ret = target(rand1);
 	unregister_jprobe(&jp);
 	if (jph_val == 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"jprobe handler not called\n");
+		pr_err("jprobe handler not called\n");
 		handler_errors++;
 	}
 
@@ -217,24 +206,21 @@ static int test_jprobes(void)
 	jp.kp.flags = 0;
 	ret = register_jprobes(jps, 2);
 	if (ret < 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"register_jprobes returned %d\n", ret);
+		pr_err("register_jprobes returned %d\n", ret);
 		return ret;
 	}
 
 	jph_val = 0;
 	ret = target(rand1);
 	if (jph_val == 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"jprobe handler not called\n");
+		pr_err("jprobe handler not called\n");
 		handler_errors++;
 	}
 
 	jph_val = 0;
 	ret = target2(rand1);
 	if (jph_val == 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"jprobe handler2 not called\n");
+		pr_err("jprobe handler2 not called\n");
 		handler_errors++;
 	}
 	unregister_jprobes(jps, 2);
@@ -256,13 +242,11 @@ static int return_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
 
 	if (ret != (rand1 / div_factor)) {
 		handler_errors++;
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"incorrect value in kretprobe handler\n");
+		pr_err("incorrect value in kretprobe handler\n");
 	}
 	if (krph_val == 0) {
 		handler_errors++;
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"call to kretprobe entry handler failed\n");
+		pr_err("call to kretprobe entry handler failed\n");
 	}
 
 	krph_val = rand1;
@@ -281,16 +265,14 @@ static int test_kretprobe(void)
 
 	ret = register_kretprobe(&rp);
 	if (ret < 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"register_kretprobe returned %d\n", ret);
+		pr_err("register_kretprobe returned %d\n", ret);
 		return ret;
 	}
 
 	ret = target(rand1);
 	unregister_kretprobe(&rp);
 	if (krph_val != rand1) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"kretprobe handler not called\n");
+		pr_err("kretprobe handler not called\n");
 		handler_errors++;
 	}
 
@@ -303,13 +285,11 @@ static int return_handler2(struct kretprobe_instance *ri, struct pt_regs *regs)
 
 	if (ret != (rand1 / div_factor) + 1) {
 		handler_errors++;
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"incorrect value in kretprobe handler2\n");
+		pr_err("incorrect value in kretprobe handler2\n");
 	}
 	if (krph_val == 0) {
 		handler_errors++;
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"call to kretprobe entry handler failed\n");
+		pr_err("call to kretprobe entry handler failed\n");
 	}
 
 	krph_val = rand1;
@@ -332,24 +312,21 @@ static int test_kretprobes(void)
 	rp.kp.flags = 0;
 	ret = register_kretprobes(rps, 2);
 	if (ret < 0) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"register_kretprobe returned %d\n", ret);
+		pr_err("register_kretprobe returned %d\n", ret);
 		return ret;
 	}
 
 	krph_val = 0;
 	ret = target(rand1);
 	if (krph_val != rand1) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"kretprobe handler not called\n");
+		pr_err("kretprobe handler not called\n");
 		handler_errors++;
 	}
 
 	krph_val = 0;
 	ret = target2(rand1);
 	if (krph_val != rand1) {
-		printk(KERN_ERR "Kprobe smoke test failed: "
-				"kretprobe handler2 not called\n");
+		pr_err("kretprobe handler2 not called\n");
 		handler_errors++;
 	}
 	unregister_kretprobes(rps, 2);
@@ -368,7 +345,7 @@ int init_test_probes(void)
 		rand1 = prandom_u32();
 	} while (rand1 <= div_factor);
 
-	printk(KERN_INFO "Kprobe smoke test started\n");
+	pr_info("started\n");
 	num_tests++;
 	ret = test_kprobe();
 	if (ret < 0)
@@ -402,13 +379,11 @@ int init_test_probes(void)
 #endif /* CONFIG_KRETPROBES */
 
 	if (errors)
-		printk(KERN_ERR "BUG: Kprobe smoke test: %d out of "
-				"%d tests failed\n", errors, num_tests);
+		pr_err("BUG: %d out of %d tests failed\n", errors, num_tests);
 	else if (handler_errors)
-		printk(KERN_ERR "BUG: Kprobe smoke test: %d error(s) "
-				"running handlers\n", handler_errors);
+		pr_err("BUG: %d error(s) running handlers\n", handler_errors);
 	else
-		printk(KERN_INFO "Kprobe smoke test passed successfully\n");
+		pr_info("passed successfully\n");
 
 	return 0;
 }
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index fcc02560fd6b..aa312b0dc3ec 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -526,21 +526,21 @@ static void m_stop(struct seq_file *seq, void *v)
 	return;
 }
 
-struct seq_operations proc_uid_seq_operations = {
+const struct seq_operations proc_uid_seq_operations = {
 	.start = uid_m_start,
 	.stop = m_stop,
 	.next = m_next,
 	.show = uid_m_show,
 };
 
-struct seq_operations proc_gid_seq_operations = {
+const struct seq_operations proc_gid_seq_operations = {
 	.start = gid_m_start,
 	.stop = m_stop,
 	.next = m_next,
 	.show = gid_m_show,
 };
 
-struct seq_operations proc_projid_seq_operations = {
+const struct seq_operations proc_projid_seq_operations = {
 	.start = projid_m_start,
 	.stop = m_stop,
 	.next = m_next,
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 51b29e9d2ba6..a8d6914030fe 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -368,6 +368,7 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
 			smp_mb__after_atomic();
 		}
 
+		add_taint(TAINT_SOFTLOCKUP, LOCKDEP_STILL_OK);
 		if (softlockup_panic)
 			panic("softlockup: hung tasks");
 		__this_cpu_write(soft_watchdog_warn, true);
diff --git a/lib/Kconfig b/lib/Kconfig
index df872659ddd3..a5ce0c7f6c30 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -508,4 +508,11 @@ config UCS2_STRING
 
 source "lib/fonts/Kconfig"
 
+#
+# sg chaining option
+#
+
+config ARCH_HAS_SG_CHAIN
+	def_bool n
+
 endmenu
diff --git a/lib/decompress.c b/lib/decompress.c
index 86069d74c062..37f3c786348f 100644
--- a/lib/decompress.c
+++ b/lib/decompress.c
@@ -54,7 +54,7 @@ static const struct compress_format compressed_formats[] __initconst = {
 	{ {0, 0}, NULL, NULL }
 };
 
-decompress_fn __init decompress_method(const unsigned char *inbuf, int len,
+decompress_fn __init decompress_method(const unsigned char *inbuf, long len,
 				const char **name)
 {
 	const struct compress_format *cf;
diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c
index 31c5f7675fbf..8290e0bef7ea 100644
--- a/lib/decompress_bunzip2.c
+++ b/lib/decompress_bunzip2.c
@@ -92,8 +92,8 @@ struct bunzip_data {
 	/* State for interrupting output loop */
 	int writeCopies, writePos, writeRunCountdown, writeCount, writeCurrent;
 	/* I/O tracking data (file handles, buffers, positions, etc.) */
-	int (*fill)(void*, unsigned int);
-	int inbufCount, inbufPos /*, outbufPos*/;
+	long (*fill)(void*, unsigned long);
+	long inbufCount, inbufPos /*, outbufPos*/;
 	unsigned char *inbuf /*,*outbuf*/;
 	unsigned int inbufBitCount, inbufBits;
 	/* The CRC values stored in the block header and calculated from the
@@ -617,7 +617,7 @@ decode_next_byte:
 	goto decode_next_byte;
 }
 
-static int INIT nofill(void *buf, unsigned int len)
+static long INIT nofill(void *buf, unsigned long len)
 {
 	return -1;
 }
@@ -625,8 +625,8 @@ static int INIT nofill(void *buf, unsigned int len)
 /* Allocate the structure, read file header.  If in_fd ==-1, inbuf must contain
    a complete bunzip file (len bytes long).  If in_fd!=-1, inbuf and len are
    ignored, and data is read from file handle into temporary buffer. */
-static int INIT start_bunzip(struct bunzip_data **bdp, void *inbuf, int len,
-			     int (*fill)(void*, unsigned int))
+static int INIT start_bunzip(struct bunzip_data **bdp, void *inbuf, long len,
+			     long (*fill)(void*, unsigned long))
 {
 	struct bunzip_data *bd;
 	unsigned int i, j, c;
@@ -675,11 +675,11 @@ static int INIT start_bunzip(struct bunzip_data **bdp, void *inbuf, int len,
 
 /* Example usage: decompress src_fd to dst_fd.  (Stops at end of bzip2 data,
    not end of file.) */
-STATIC int INIT bunzip2(unsigned char *buf, int len,
-			int(*fill)(void*, unsigned int),
-			int(*flush)(void*, unsigned int),
+STATIC int INIT bunzip2(unsigned char *buf, long len,
+			long (*fill)(void*, unsigned long),
+			long (*flush)(void*, unsigned long),
 			unsigned char *outbuf,
-			int *pos,
+			long *pos,
 			void(*error)(char *x))
 {
 	struct bunzip_data *bd;
@@ -743,11 +743,11 @@ exit_0:
 }
 
 #ifdef PREBOOT
-STATIC int INIT decompress(unsigned char *buf, int len,
-			int(*fill)(void*, unsigned int),
-			int(*flush)(void*, unsigned int),
+STATIC int INIT decompress(unsigned char *buf, long len,
+			long (*fill)(void*, unsigned long),
+			long (*flush)(void*, unsigned long),
 			unsigned char *outbuf,
-			int *pos,
+			long *pos,
 			void(*error)(char *x))
 {
 	return bunzip2(buf, len - 4, fill, flush, outbuf, pos, error);
diff --git a/lib/decompress_inflate.c b/lib/decompress_inflate.c
index 0edfd742a154..d4c7891635ec 100644
--- a/lib/decompress_inflate.c
+++ b/lib/decompress_inflate.c
@@ -27,17 +27,17 @@
 
 #define GZIP_IOBUF_SIZE (16*1024)
 
-static int INIT nofill(void *buffer, unsigned int len)
+static long INIT nofill(void *buffer, unsigned long len)
 {
 	return -1;
 }
 
 /* Included from initramfs et al code */
-STATIC int INIT gunzip(unsigned char *buf, int len,
-		       int(*fill)(void*, unsigned int),
-		       int(*flush)(void*, unsigned int),
+STATIC int INIT gunzip(unsigned char *buf, long len,
+		       long (*fill)(void*, unsigned long),
+		       long (*flush)(void*, unsigned long),
 		       unsigned char *out_buf,
-		       int *pos,
+		       long *pos,
 		       void(*error)(char *x)) {
 	u8 *zbuf;
 	struct z_stream_s *strm;
@@ -142,7 +142,7 @@ STATIC int INIT gunzip(unsigned char *buf, int len,
 
 		/* Write any data generated */
 		if (flush && strm->next_out > out_buf) {
-			int l = strm->next_out - out_buf;
+			long l = strm->next_out - out_buf;
 			if (l != flush(out_buf, l)) {
 				rc = -1;
 				error("write error");
diff --git a/lib/decompress_unlz4.c b/lib/decompress_unlz4.c
index 7d1e83caf8ad..40f66ebe57b7 100644
--- a/lib/decompress_unlz4.c
+++ b/lib/decompress_unlz4.c
@@ -31,10 +31,10 @@
 #define LZ4_DEFAULT_UNCOMPRESSED_CHUNK_SIZE (8 << 20)
 #define ARCHIVE_MAGICNUMBER 0x184C2102
 
-STATIC inline int INIT unlz4(u8 *input, int in_len,
-				int (*fill) (void *, unsigned int),
-				int (*flush) (void *, unsigned int),
-				u8 *output, int *posp,
+STATIC inline int INIT unlz4(u8 *input, long in_len,
+				long (*fill)(void *, unsigned long),
+				long (*flush)(void *, unsigned long),
+				u8 *output, long *posp,
 				void (*error) (char *x))
 {
 	int ret = -1;
@@ -43,7 +43,7 @@ STATIC inline int INIT unlz4(u8 *input, int in_len,
 	u8 *inp;
 	u8 *inp_start;
 	u8 *outp;
-	int size = in_len;
+	long size = in_len;
 #ifdef PREBOOT
 	size_t out_len = get_unaligned_le32(input + in_len);
 #endif
@@ -83,13 +83,20 @@ STATIC inline int INIT unlz4(u8 *input, int in_len,
 	if (posp)
 		*posp = 0;
 
-	if (fill)
-		fill(inp, 4);
+	if (fill) {
+		size = fill(inp, 4);
+		if (size < 4) {
+			error("data corrupted");
+			goto exit_2;
+		}
+	}
 
 	chunksize = get_unaligned_le32(inp);
 	if (chunksize == ARCHIVE_MAGICNUMBER) {
-		inp += 4;
-		size -= 4;
+		if (!fill) {
+			inp += 4;
+			size -= 4;
+		}
 	} else {
 		error("invalid header");
 		goto exit_2;
@@ -100,29 +107,44 @@ STATIC inline int INIT unlz4(u8 *input, int in_len,
 
 	for (;;) {
 
-		if (fill)
-			fill(inp, 4);
+		if (fill) {
+			size = fill(inp, 4);
+			if (size == 0)
+				break;
+			if (size < 4) {
+				error("data corrupted");
+				goto exit_2;
+			}
+		}
 
 		chunksize = get_unaligned_le32(inp);
 		if (chunksize == ARCHIVE_MAGICNUMBER) {
-			inp += 4;
-			size -= 4;
+			if (!fill) {
+				inp += 4;
+				size -= 4;
+			}
 			if (posp)
 				*posp += 4;
 			continue;
 		}
-		inp += 4;
-		size -= 4;
+
 
 		if (posp)
 			*posp += 4;
 
-		if (fill) {
+		if (!fill) {
+			inp += 4;
+			size -= 4;
+		} else {
 			if (chunksize > lz4_compressbound(uncomp_chunksize)) {
 				error("chunk length is longer than allocated");
 				goto exit_2;
 			}
-			fill(inp, chunksize);
+			size = fill(inp, chunksize);
+			if (size < chunksize) {
+				error("data corrupted");
+				goto exit_2;
+			}
 		}
 #ifdef PREBOOT
 		if (out_len >= uncomp_chunksize) {
@@ -149,18 +171,17 @@ STATIC inline int INIT unlz4(u8 *input, int in_len,
 		if (posp)
 			*posp += chunksize;
 
-		size -= chunksize;
+		if (!fill) {
+			size -= chunksize;
 
-		if (size == 0)
-			break;
-		else if (size < 0) {
-			error("data corrupted");
-			goto exit_2;
+			if (size == 0)
+				break;
+			else if (size < 0) {
+				error("data corrupted");
+				goto exit_2;
+			}
+			inp += chunksize;
 		}
-
-		inp += chunksize;
-		if (fill)
-			inp = inp_start;
 	}
 
 	ret = 0;
@@ -175,11 +196,11 @@ exit_0:
 }
 
 #ifdef PREBOOT
-STATIC int INIT decompress(unsigned char *buf, int in_len,
-			      int(*fill)(void*, unsigned int),
-			      int(*flush)(void*, unsigned int),
+STATIC int INIT decompress(unsigned char *buf, long in_len,
+			      long (*fill)(void*, unsigned long),
+			      long (*flush)(void*, unsigned long),
 			      unsigned char *output,
-			      int *posp,
+			      long *posp,
 			      void(*error)(char *x)
 	)
 {
diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c
index 32adb73a9038..0be83af62b88 100644
--- a/lib/decompress_unlzma.c
+++ b/lib/decompress_unlzma.c
@@ -65,11 +65,11 @@ static long long INIT read_int(unsigned char *ptr, int size)
 #define LZMA_IOBUF_SIZE	0x10000
 
 struct rc {
-	int (*fill)(void*, unsigned int);
+	long (*fill)(void*, unsigned long);
 	uint8_t *ptr;
 	uint8_t *buffer;
 	uint8_t *buffer_end;
-	int buffer_size;
+	long buffer_size;
 	uint32_t code;
 	uint32_t range;
 	uint32_t bound;
@@ -82,7 +82,7 @@ struct rc {
 #define RC_MODEL_TOTAL_BITS 11
 
 
-static int INIT nofill(void *buffer, unsigned int len)
+static long INIT nofill(void *buffer, unsigned long len)
 {
 	return -1;
 }
@@ -99,8 +99,8 @@ static void INIT rc_read(struct rc *rc)
 
 /* Called once */
 static inline void INIT rc_init(struct rc *rc,
-				       int (*fill)(void*, unsigned int),
-				       char *buffer, int buffer_size)
+				       long (*fill)(void*, unsigned long),
+				       char *buffer, long buffer_size)
 {
 	if (fill)
 		rc->fill = fill;
@@ -280,7 +280,7 @@ struct writer {
 	size_t buffer_pos;
 	int bufsize;
 	size_t global_pos;
-	int(*flush)(void*, unsigned int);
+	long (*flush)(void*, unsigned long);
 	struct lzma_header *header;
 };
 
@@ -534,11 +534,11 @@ static inline int INIT process_bit1(struct writer *wr, struct rc *rc,
 
 
 
-STATIC inline int INIT unlzma(unsigned char *buf, int in_len,
-			      int(*fill)(void*, unsigned int),
-			      int(*flush)(void*, unsigned int),
+STATIC inline int INIT unlzma(unsigned char *buf, long in_len,
+			      long (*fill)(void*, unsigned long),
+			      long (*flush)(void*, unsigned long),
 			      unsigned char *output,
-			      int *posp,
+			      long *posp,
 			      void(*error)(char *x)
 	)
 {
@@ -667,11 +667,11 @@ exit_0:
 }
 
 #ifdef PREBOOT
-STATIC int INIT decompress(unsigned char *buf, int in_len,
-			      int(*fill)(void*, unsigned int),
-			      int(*flush)(void*, unsigned int),
+STATIC int INIT decompress(unsigned char *buf, long in_len,
+			      long (*fill)(void*, unsigned long),
+			      long (*flush)(void*, unsigned long),
 			      unsigned char *output,
-			      int *posp,
+			      long *posp,
 			      void(*error)(char *x)
 	)
 {
diff --git a/lib/decompress_unlzo.c b/lib/decompress_unlzo.c
index 960183d4258f..b94a31bdd87d 100644
--- a/lib/decompress_unlzo.c
+++ b/lib/decompress_unlzo.c
@@ -51,7 +51,7 @@ static const unsigned char lzop_magic[] = {
 #define HEADER_SIZE_MIN       (9 + 7     + 4 + 8     + 1       + 4)
 #define HEADER_SIZE_MAX       (9 + 7 + 1 + 8 + 8 + 4 + 1 + 255 + 4)
 
-STATIC inline int INIT parse_header(u8 *input, int *skip, int in_len)
+STATIC inline long INIT parse_header(u8 *input, long *skip, long in_len)
 {
 	int l;
 	u8 *parse = input;
@@ -108,14 +108,14 @@ STATIC inline int INIT parse_header(u8 *input, int *skip, int in_len)
 	return 1;
 }
 
-STATIC inline int INIT unlzo(u8 *input, int in_len,
-				int (*fill) (void *, unsigned int),
-				int (*flush) (void *, unsigned int),
-				u8 *output, int *posp,
+STATIC int INIT unlzo(u8 *input, long in_len,
+				long (*fill)(void *, unsigned long),
+				long (*flush)(void *, unsigned long),
+				u8 *output, long *posp,
 				void (*error) (char *x))
 {
 	u8 r = 0;
-	int skip = 0;
+	long skip = 0;
 	u32 src_len, dst_len;
 	size_t tmp;
 	u8 *in_buf, *in_buf_save, *out_buf;
diff --git a/lib/decompress_unxz.c b/lib/decompress_unxz.c
index 9f34eb56854d..b07a78340e9d 100644
--- a/lib/decompress_unxz.c
+++ b/lib/decompress_unxz.c
@@ -248,10 +248,10 @@ void *memmove(void *dest, const void *src, size_t size)
  * both input and output buffers are available as a single chunk, i.e. when
  * fill() and flush() won't be used.
  */
-STATIC int INIT unxz(unsigned char *in, int in_size,
-		     int (*fill)(void *dest, unsigned int size),
-		     int (*flush)(void *src, unsigned int size),
-		     unsigned char *out, int *in_used,
+STATIC int INIT unxz(unsigned char *in, long in_size,
+		     long (*fill)(void *dest, unsigned long size),
+		     long (*flush)(void *src, unsigned long size),
+		     unsigned char *out, long *in_used,
 		     void (*error)(char *x))
 {
 	struct xz_buf b;
@@ -329,7 +329,7 @@ STATIC int INIT unxz(unsigned char *in, int in_size,
 				 * returned by xz_dec_run(), but probably
 				 * it's not too bad.
 				 */
-				if (flush(b.out, b.out_pos) != (int)b.out_pos)
+				if (flush(b.out, b.out_pos) != (long)b.out_pos)
 					ret = XZ_BUF_ERROR;
 
 				b.out_pos = 0;
diff --git a/lib/idr.c b/lib/idr.c
index 39158abebad1..50be3fa9b657 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -590,26 +590,27 @@ static void __idr_remove_all(struct idr *idp)
 	struct idr_layer **paa = &pa[0];
 
 	n = idp->layers * IDR_BITS;
-	p = idp->top;
+	*paa = idp->top;
 	RCU_INIT_POINTER(idp->top, NULL);
 	max = idr_max(idp->layers);
 
 	id = 0;
 	while (id >= 0 && id <= max) {
+		p = *paa;
 		while (n > IDR_BITS && p) {
 			n -= IDR_BITS;
-			*paa++ = p;
 			p = p->ary[(id >> n) & IDR_MASK];
+			*++paa = p;
 		}
 
 		bt_mask = id;
 		id += 1 << n;
 		/* Get the highest bit that the above add changed from 0->1. */
 		while (n < fls(id ^ bt_mask)) {
-			if (p)
-				free_layer(idp, p);
+			if (*paa)
+				free_layer(idp, *paa);
 			n += IDR_BITS;
-			p = *--paa;
+			--paa;
 		}
 	}
 	idp->layers = 0;
@@ -692,15 +693,16 @@ int idr_for_each(struct idr *idp,
 	struct idr_layer **paa = &pa[0];
 
 	n = idp->layers * IDR_BITS;
-	p = rcu_dereference_raw(idp->top);
+	*paa = rcu_dereference_raw(idp->top);
 	max = idr_max(idp->layers);
 
 	id = 0;
 	while (id >= 0 && id <= max) {
+		p = *paa;
 		while (n > 0 && p) {
 			n -= IDR_BITS;
-			*paa++ = p;
 			p = rcu_dereference_raw(p->ary[(id >> n) & IDR_MASK]);
+			*++paa = p;
 		}
 
 		if (p) {
@@ -712,7 +714,7 @@ int idr_for_each(struct idr *idp,
 		id += 1 << n;
 		while (n < fls(id)) {
 			n += IDR_BITS;
-			p = *--paa;
+			--paa;
 		}
 	}
 
@@ -740,17 +742,18 @@ void *idr_get_next(struct idr *idp, int *nextidp)
 	int n, max;
 
 	/* find first ent */
-	p = rcu_dereference_raw(idp->top);
+	p = *paa = rcu_dereference_raw(idp->top);
 	if (!p)
 		return NULL;
 	n = (p->layer + 1) * IDR_BITS;
 	max = idr_max(p->layer + 1);
 
 	while (id >= 0 && id <= max) {
+		p = *paa;
 		while (n > 0 && p) {
 			n -= IDR_BITS;
-			*paa++ = p;
 			p = rcu_dereference_raw(p->ary[(id >> n) & IDR_MASK]);
+			*++paa = p;
 		}
 
 		if (p) {
@@ -768,7 +771,7 @@ void *idr_get_next(struct idr *idp, int *nextidp)
 		id = round_up(id + 1, 1 << n);
 		while (n < fls(id)) {
 			n += IDR_BITS;
-			p = *--paa;
+			--paa;
 		}
 	}
 	return NULL;
diff --git a/lib/kfifo.c b/lib/kfifo.c
index d79b9d222065..90ba1eb1df06 100644
--- a/lib/kfifo.c
+++ b/lib/kfifo.c
@@ -561,8 +561,7 @@ EXPORT_SYMBOL(__kfifo_to_user_r);
 unsigned int __kfifo_dma_in_prepare_r(struct __kfifo *fifo,
 	struct scatterlist *sgl, int nents, unsigned int len, size_t recsize)
 {
-	if (!nents)
-		BUG();
+	BUG_ON(!nents);
 
 	len = __kfifo_max_r(len, recsize);
 
@@ -585,8 +584,7 @@ EXPORT_SYMBOL(__kfifo_dma_in_finish_r);
 unsigned int __kfifo_dma_out_prepare_r(struct __kfifo *fifo,
 	struct scatterlist *sgl, int nents, unsigned int len, size_t recsize)
 {
-	if (!nents)
-		BUG();
+	BUG_ON(!nents);
 
 	len = __kfifo_max_r(len, recsize);
 
diff --git a/lib/rbtree.c b/lib/rbtree.c
index 65f4effd117f..c16c81a3d430 100644
--- a/lib/rbtree.c
+++ b/lib/rbtree.c
@@ -101,7 +101,7 @@ __rb_insert(struct rb_node *node, struct rb_root *root,
 				 *      / \          / \
 				 *     p   u  -->   P   U
 				 *    /            /
-				 *   n            N
+				 *   n            n
 				 *
 				 * However, since g's parent might be red, and
 				 * 4) does not allow this, we need to recurse
diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index b4415fceb7e7..9cdf62f8accd 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -73,7 +73,7 @@ EXPORT_SYMBOL(sg_nents);
  **/
 struct scatterlist *sg_last(struct scatterlist *sgl, unsigned int nents)
 {
-#ifndef ARCH_HAS_SG_CHAIN
+#ifndef CONFIG_ARCH_HAS_SG_CHAIN
 	struct scatterlist *ret = &sgl[nents - 1];
 #else
 	struct scatterlist *sg, *ret = NULL;
@@ -255,7 +255,7 @@ int __sg_alloc_table(struct sg_table *table, unsigned int nents,
 
 	if (nents == 0)
 		return -EINVAL;
-#ifndef ARCH_HAS_SG_CHAIN
+#ifndef CONFIG_ARCH_HAS_SG_CHAIN
 	if (WARN_ON_ONCE(nents > max_ents))
 		return -EINVAL;
 #endif
diff --git a/mm/filemap.c b/mm/filemap.c
index af19a6b079f5..f501b56ec2c6 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -31,6 +31,7 @@
 #include <linux/security.h>
 #include <linux/cpuset.h>
 #include <linux/hardirq.h> /* for BUG_ON(!in_atomic()) only */
+#include <linux/hugetlb.h>
 #include <linux/memcontrol.h>
 #include <linux/cleancache.h>
 #include <linux/rmap.h>
@@ -233,7 +234,6 @@ void delete_from_page_cache(struct page *page)
 	spin_lock_irq(&mapping->tree_lock);
 	__delete_from_page_cache(page, NULL);
 	spin_unlock_irq(&mapping->tree_lock);
-	mem_cgroup_uncharge_cache_page(page);
 
 	if (freepage)
 		freepage(page);
@@ -489,8 +489,7 @@ int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask)
 		if (PageSwapBacked(new))
 			__inc_zone_page_state(new, NR_SHMEM);
 		spin_unlock_irq(&mapping->tree_lock);
-		/* mem_cgroup codes must not be called under tree_lock */
-		mem_cgroup_replace_page_cache(old, new);
+		mem_cgroup_migrate(old, new, true);
 		radix_tree_preload_end();
 		if (freepage)
 			freepage(old);
@@ -548,19 +547,24 @@ static int __add_to_page_cache_locked(struct page *page,
 				      pgoff_t offset, gfp_t gfp_mask,
 				      void **shadowp)
 {
+	int huge = PageHuge(page);
+	struct mem_cgroup *memcg;
 	int error;
 
 	VM_BUG_ON_PAGE(!PageLocked(page), page);
 	VM_BUG_ON_PAGE(PageSwapBacked(page), page);
 
-	error = mem_cgroup_charge_file(page, current->mm,
-					gfp_mask & GFP_RECLAIM_MASK);
-	if (error)
-		return error;
+	if (!huge) {
+		error = mem_cgroup_try_charge(page, current->mm,
+					      gfp_mask, &memcg);
+		if (error)
+			return error;
+	}
 
 	error = radix_tree_maybe_preload(gfp_mask & ~__GFP_HIGHMEM);
 	if (error) {
-		mem_cgroup_uncharge_cache_page(page);
+		if (!huge)
+			mem_cgroup_cancel_charge(page, memcg);
 		return error;
 	}
 
@@ -575,13 +579,16 @@ static int __add_to_page_cache_locked(struct page *page,
 		goto err_insert;
 	__inc_zone_page_state(page, NR_FILE_PAGES);
 	spin_unlock_irq(&mapping->tree_lock);
+	if (!huge)
+		mem_cgroup_commit_charge(page, memcg, false);
 	trace_mm_filemap_add_to_page_cache(page);
 	return 0;
 err_insert:
 	page->mapping = NULL;
 	/* Leave page->index set: truncation relies upon it */
 	spin_unlock_irq(&mapping->tree_lock);
-	mem_cgroup_uncharge_cache_page(page);
+	if (!huge)
+		mem_cgroup_cancel_charge(page, memcg);
 	page_cache_release(page);
 	return error;
 }
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 3630d577e987..d9a21d06b862 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -715,13 +715,20 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm,
 					unsigned long haddr, pmd_t *pmd,
 					struct page *page)
 {
+	struct mem_cgroup *memcg;
 	pgtable_t pgtable;
 	spinlock_t *ptl;
 
 	VM_BUG_ON_PAGE(!PageCompound(page), page);
+
+	if (mem_cgroup_try_charge(page, mm, GFP_TRANSHUGE, &memcg))
+		return VM_FAULT_OOM;
+
 	pgtable = pte_alloc_one(mm, haddr);
-	if (unlikely(!pgtable))
+	if (unlikely(!pgtable)) {
+		mem_cgroup_cancel_charge(page, memcg);
 		return VM_FAULT_OOM;
+	}
 
 	clear_huge_page(page, haddr, HPAGE_PMD_NR);
 	/*
@@ -734,7 +741,7 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm,
 	ptl = pmd_lock(mm, pmd);
 	if (unlikely(!pmd_none(*pmd))) {
 		spin_unlock(ptl);
-		mem_cgroup_uncharge_page(page);
+		mem_cgroup_cancel_charge(page, memcg);
 		put_page(page);
 		pte_free(mm, pgtable);
 	} else {
@@ -742,6 +749,8 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm,
 		entry = mk_huge_pmd(page, vma->vm_page_prot);
 		entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma);
 		page_add_new_anon_rmap(page, vma, haddr);
+		mem_cgroup_commit_charge(page, memcg, false);
+		lru_cache_add_active_or_unevictable(page, vma);
 		pgtable_trans_huge_deposit(mm, pmd, pgtable);
 		set_pmd_at(mm, haddr, pmd, entry);
 		add_mm_counter(mm, MM_ANONPAGES, HPAGE_PMD_NR);
@@ -827,13 +836,7 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
 		count_vm_event(THP_FAULT_FALLBACK);
 		return VM_FAULT_FALLBACK;
 	}
-	if (unlikely(mem_cgroup_charge_anon(page, mm, GFP_TRANSHUGE))) {
-		put_page(page);
-		count_vm_event(THP_FAULT_FALLBACK);
-		return VM_FAULT_FALLBACK;
-	}
 	if (unlikely(__do_huge_pmd_anonymous_page(mm, vma, haddr, pmd, page))) {
-		mem_cgroup_uncharge_page(page);
 		put_page(page);
 		count_vm_event(THP_FAULT_FALLBACK);
 		return VM_FAULT_FALLBACK;
@@ -979,6 +982,7 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm,
 					struct page *page,
 					unsigned long haddr)
 {
+	struct mem_cgroup *memcg;
 	spinlock_t *ptl;
 	pgtable_t pgtable;
 	pmd_t _pmd;
@@ -999,20 +1003,21 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm,
 					       __GFP_OTHER_NODE,
 					       vma, address, page_to_nid(page));
 		if (unlikely(!pages[i] ||
-			     mem_cgroup_charge_anon(pages[i], mm,
-						       GFP_KERNEL))) {
+			     mem_cgroup_try_charge(pages[i], mm, GFP_KERNEL,
+						   &memcg))) {
 			if (pages[i])
 				put_page(pages[i]);
-			mem_cgroup_uncharge_start();
 			while (--i >= 0) {
-				mem_cgroup_uncharge_page(pages[i]);
+				memcg = (void *)page_private(pages[i]);
+				set_page_private(pages[i], 0);
+				mem_cgroup_cancel_charge(pages[i], memcg);
 				put_page(pages[i]);
 			}
-			mem_cgroup_uncharge_end();
 			kfree(pages);
 			ret |= VM_FAULT_OOM;
 			goto out;
 		}
+		set_page_private(pages[i], (unsigned long)memcg);
 	}
 
 	for (i = 0; i < HPAGE_PMD_NR; i++) {
@@ -1041,7 +1046,11 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm,
 		pte_t *pte, entry;
 		entry = mk_pte(pages[i], vma->vm_page_prot);
 		entry = maybe_mkwrite(pte_mkdirty(entry), vma);
+		memcg = (void *)page_private(pages[i]);
+		set_page_private(pages[i], 0);
 		page_add_new_anon_rmap(pages[i], vma, haddr);
+		mem_cgroup_commit_charge(pages[i], memcg, false);
+		lru_cache_add_active_or_unevictable(pages[i], vma);
 		pte = pte_offset_map(&_pmd, haddr);
 		VM_BUG_ON(!pte_none(*pte));
 		set_pte_at(mm, haddr, pte, entry);
@@ -1065,12 +1074,12 @@ out:
 out_free_pages:
 	spin_unlock(ptl);
 	mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
-	mem_cgroup_uncharge_start();
 	for (i = 0; i < HPAGE_PMD_NR; i++) {
-		mem_cgroup_uncharge_page(pages[i]);
+		memcg = (void *)page_private(pages[i]);
+		set_page_private(pages[i], 0);
+		mem_cgroup_cancel_charge(pages[i], memcg);
 		put_page(pages[i]);
 	}
-	mem_cgroup_uncharge_end();
 	kfree(pages);
 	goto out;
 }
@@ -1081,6 +1090,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
 	spinlock_t *ptl;
 	int ret = 0;
 	struct page *page = NULL, *new_page;
+	struct mem_cgroup *memcg;
 	unsigned long haddr;
 	unsigned long mmun_start;	/* For mmu_notifiers */
 	unsigned long mmun_end;		/* For mmu_notifiers */
@@ -1132,7 +1142,8 @@ alloc:
 		goto out;
 	}
 
-	if (unlikely(mem_cgroup_charge_anon(new_page, mm, GFP_TRANSHUGE))) {
+	if (unlikely(mem_cgroup_try_charge(new_page, mm,
+					   GFP_TRANSHUGE, &memcg))) {
 		put_page(new_page);
 		if (page) {
 			split_huge_page(page);
@@ -1161,7 +1172,7 @@ alloc:
 		put_user_huge_page(page);
 	if (unlikely(!pmd_same(*pmd, orig_pmd))) {
 		spin_unlock(ptl);
-		mem_cgroup_uncharge_page(new_page);
+		mem_cgroup_cancel_charge(new_page, memcg);
 		put_page(new_page);
 		goto out_mn;
 	} else {
@@ -1170,6 +1181,8 @@ alloc:
 		entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma);
 		pmdp_clear_flush(vma, haddr, pmd);
 		page_add_new_anon_rmap(new_page, vma, haddr);
+		mem_cgroup_commit_charge(new_page, memcg, false);
+		lru_cache_add_active_or_unevictable(new_page, vma);
 		set_pmd_at(mm, haddr, pmd, entry);
 		update_mmu_cache_pmd(vma, address, pmd);
 		if (!page) {
@@ -2413,6 +2426,7 @@ static void collapse_huge_page(struct mm_struct *mm,
 	spinlock_t *pmd_ptl, *pte_ptl;
 	int isolated;
 	unsigned long hstart, hend;
+	struct mem_cgroup *memcg;
 	unsigned long mmun_start;	/* For mmu_notifiers */
 	unsigned long mmun_end;		/* For mmu_notifiers */
 
@@ -2423,7 +2437,8 @@ static void collapse_huge_page(struct mm_struct *mm,
 	if (!new_page)
 		return;
 
-	if (unlikely(mem_cgroup_charge_anon(new_page, mm, GFP_TRANSHUGE)))
+	if (unlikely(mem_cgroup_try_charge(new_page, mm,
+					   GFP_TRANSHUGE, &memcg)))
 		return;
 
 	/*
@@ -2510,6 +2525,8 @@ static void collapse_huge_page(struct mm_struct *mm,
 	spin_lock(pmd_ptl);
 	BUG_ON(!pmd_none(*pmd));
 	page_add_new_anon_rmap(new_page, vma, address);
+	mem_cgroup_commit_charge(new_page, memcg, false);
+	lru_cache_add_active_or_unevictable(new_page, vma);
 	pgtable_trans_huge_deposit(mm, pmd, pgtable);
 	set_pmd_at(mm, address, pmd, _pmd);
 	update_mmu_cache_pmd(vma, address, pmd);
@@ -2523,7 +2540,7 @@ out_up_write:
 	return;
 
 out:
-	mem_cgroup_uncharge_page(new_page);
+	mem_cgroup_cancel_charge(new_page, memcg);
 	goto out_up_write;
 }
 
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 90dc501eaf3f..ec4dcf1b9562 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -754,9 +754,11 @@ static void __mem_cgroup_remove_exceeded(struct mem_cgroup_per_zone *mz,
 static void mem_cgroup_remove_exceeded(struct mem_cgroup_per_zone *mz,
 				       struct mem_cgroup_tree_per_zone *mctz)
 {
-	spin_lock(&mctz->lock);
+	unsigned long flags;
+
+	spin_lock_irqsave(&mctz->lock, flags);
 	__mem_cgroup_remove_exceeded(mz, mctz);
-	spin_unlock(&mctz->lock);
+	spin_unlock_irqrestore(&mctz->lock, flags);
 }
 
 
@@ -779,7 +781,9 @@ static void mem_cgroup_update_tree(struct mem_cgroup *memcg, struct page *page)
 		 * mem is over its softlimit.
 		 */
 		if (excess || mz->on_tree) {
-			spin_lock(&mctz->lock);
+			unsigned long flags;
+
+			spin_lock_irqsave(&mctz->lock, flags);
 			/* if on-tree, remove it */
 			if (mz->on_tree)
 				__mem_cgroup_remove_exceeded(mz, mctz);
@@ -788,7 +792,7 @@ static void mem_cgroup_update_tree(struct mem_cgroup *memcg, struct page *page)
 			 * If excess is 0, no tree ops.
 			 */
 			__mem_cgroup_insert_exceeded(mz, mctz, excess);
-			spin_unlock(&mctz->lock);
+			spin_unlock_irqrestore(&mctz->lock, flags);
 		}
 	}
 }
@@ -839,9 +843,9 @@ mem_cgroup_largest_soft_limit_node(struct mem_cgroup_tree_per_zone *mctz)
 {
 	struct mem_cgroup_per_zone *mz;
 
-	spin_lock(&mctz->lock);
+	spin_lock_irq(&mctz->lock);
 	mz = __mem_cgroup_largest_soft_limit_node(mctz);
-	spin_unlock(&mctz->lock);
+	spin_unlock_irq(&mctz->lock);
 	return mz;
 }
 
@@ -882,13 +886,6 @@ static long mem_cgroup_read_stat(struct mem_cgroup *memcg,
 	return val;
 }
 
-static void mem_cgroup_swap_statistics(struct mem_cgroup *memcg,
-					 bool charge)
-{
-	int val = (charge) ? 1 : -1;
-	this_cpu_add(memcg->stat->count[MEM_CGROUP_STAT_SWAP], val);
-}
-
 static unsigned long mem_cgroup_read_events(struct mem_cgroup *memcg,
 					    enum mem_cgroup_events_index idx)
 {
@@ -909,13 +906,13 @@ static unsigned long mem_cgroup_read_events(struct mem_cgroup *memcg,
 
 static void mem_cgroup_charge_statistics(struct mem_cgroup *memcg,
 					 struct page *page,
-					 bool anon, int nr_pages)
+					 int nr_pages)
 {
 	/*
 	 * Here, RSS means 'mapped anon' and anon's SwapCache. Shmem/tmpfs is
 	 * counted as CACHE even if it's on ANON LRU.
 	 */
-	if (anon)
+	if (PageAnon(page))
 		__this_cpu_add(memcg->stat->count[MEM_CGROUP_STAT_RSS],
 				nr_pages);
 	else
@@ -1013,7 +1010,6 @@ static bool mem_cgroup_event_ratelimit(struct mem_cgroup *memcg,
  */
 static void memcg_check_events(struct mem_cgroup *memcg, struct page *page)
 {
-	preempt_disable();
 	/* threshold event is triggered in finer grain than soft limit */
 	if (unlikely(mem_cgroup_event_ratelimit(memcg,
 						MEM_CGROUP_TARGET_THRESH))) {
@@ -1026,8 +1022,6 @@ static void memcg_check_events(struct mem_cgroup *memcg, struct page *page)
 		do_numainfo = mem_cgroup_event_ratelimit(memcg,
 						MEM_CGROUP_TARGET_NUMAINFO);
 #endif
-		preempt_enable();
-
 		mem_cgroup_threshold(memcg);
 		if (unlikely(do_softlimit))
 			mem_cgroup_update_tree(memcg, page);
@@ -1035,8 +1029,7 @@ static void memcg_check_events(struct mem_cgroup *memcg, struct page *page)
 		if (unlikely(do_numainfo))
 			atomic_inc(&memcg->numainfo_events);
 #endif
-	} else
-		preempt_enable();
+	}
 }
 
 struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p)
@@ -1347,20 +1340,6 @@ out:
 	return lruvec;
 }
 
-/*
- * Following LRU functions are allowed to be used without PCG_LOCK.
- * Operations are called by routine of global LRU independently from memcg.
- * What we have to take care of here is validness of pc->mem_cgroup.
- *
- * Changes to pc->mem_cgroup happens when
- * 1. charge
- * 2. moving account
- * In typical case, "charge" is done before add-to-lru. Exception is SwapCache.
- * It is added to LRU before charge.
- * If PCG_USED bit is not set, page_cgroup is not added to this private LRU.
- * When moving account, the page is not on LRU. It's isolated.
- */
-
 /**
  * mem_cgroup_page_lruvec - return lruvec for adding an lru page
  * @page: the page
@@ -2261,22 +2240,14 @@ cleanup:
  *
  * Notes: Race condition
  *
- * We usually use lock_page_cgroup() for accessing page_cgroup member but
- * it tends to be costly. But considering some conditions, we doesn't need
- * to do so _always_.
- *
- * Considering "charge", lock_page_cgroup() is not required because all
- * file-stat operations happen after a page is attached to radix-tree. There
- * are no race with "charge".
+ * Charging occurs during page instantiation, while the page is
+ * unmapped and locked in page migration, or while the page table is
+ * locked in THP migration.  No race is possible.
  *
- * Considering "uncharge", we know that memcg doesn't clear pc->mem_cgroup
- * at "uncharge" intentionally. So, we always see valid pc->mem_cgroup even
- * if there are race with "uncharge". Statistics itself is properly handled
- * by flags.
+ * Uncharge happens to pages with zero references, no race possible.
  *
- * Considering "move", this is an only case we see a race. To make the race
- * small, we check memcg->moving_account and detect there are possibility
- * of race or not. If there is, we take a lock.
+ * Charge moving between groups is protected by checking mm->moving
+ * account and taking the move_lock in the slowpath.
  */
 
 void __mem_cgroup_begin_update_page_stat(struct page *page,
@@ -2551,17 +2522,8 @@ static int memcg_cpu_hotplug_callback(struct notifier_block *nb,
 	return NOTIFY_OK;
 }
 
-/**
- * mem_cgroup_try_charge - try charging a memcg
- * @memcg: memcg to charge
- * @nr_pages: number of pages to charge
- *
- * Returns 0 if @memcg was charged successfully, -EINTR if the charge
- * was bypassed to root_mem_cgroup, and -ENOMEM if the charge failed.
- */
-static int mem_cgroup_try_charge(struct mem_cgroup *memcg,
-				 gfp_t gfp_mask,
-				 unsigned int nr_pages)
+static int try_charge(struct mem_cgroup *memcg, gfp_t gfp_mask,
+		      unsigned int nr_pages)
 {
 	unsigned int batch = max(CHARGE_BATCH, nr_pages);
 	int nr_retries = MEM_CGROUP_RECLAIM_RETRIES;
@@ -2660,41 +2622,7 @@ done:
 	return ret;
 }
 
-/**
- * mem_cgroup_try_charge_mm - try charging a mm
- * @mm: mm_struct to charge
- * @nr_pages: number of pages to charge
- * @oom: trigger OOM if reclaim fails
- *
- * Returns the charged mem_cgroup associated with the given mm_struct or
- * NULL the charge failed.
- */
-static struct mem_cgroup *mem_cgroup_try_charge_mm(struct mm_struct *mm,
-				 gfp_t gfp_mask,
-				 unsigned int nr_pages)
-
-{
-	struct mem_cgroup *memcg;
-	int ret;
-
-	memcg = get_mem_cgroup_from_mm(mm);
-	ret = mem_cgroup_try_charge(memcg, gfp_mask, nr_pages);
-	css_put(&memcg->css);
-	if (ret == -EINTR)
-		memcg = root_mem_cgroup;
-	else if (ret)
-		memcg = NULL;
-
-	return memcg;
-}
-
-/*
- * Somemtimes we have to undo a charge we got by try_charge().
- * This function is for that and do uncharge, put css's refcnt.
- * gotten by try_charge().
- */
-static void __mem_cgroup_cancel_charge(struct mem_cgroup *memcg,
-				       unsigned int nr_pages)
+static void cancel_charge(struct mem_cgroup *memcg, unsigned int nr_pages)
 {
 	unsigned long bytes = nr_pages * PAGE_SIZE;
 
@@ -2732,6 +2660,16 @@ static struct mem_cgroup *mem_cgroup_lookup(unsigned short id)
 	return mem_cgroup_from_id(id);
 }
 
+/*
+ * try_get_mem_cgroup_from_page - look up page's memcg association
+ * @page: the page
+ *
+ * Look up, get a css reference, and return the memcg that owns @page.
+ *
+ * The page must be locked to prevent racing with swap-in and page
+ * cache charges.  If coming from an unlocked page table, the caller
+ * must ensure the page is on the LRU or this can race with charging.
+ */
 struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
 {
 	struct mem_cgroup *memcg = NULL;
@@ -2742,7 +2680,6 @@ struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
 	VM_BUG_ON_PAGE(!PageLocked(page), page);
 
 	pc = lookup_page_cgroup(page);
-	lock_page_cgroup(pc);
 	if (PageCgroupUsed(pc)) {
 		memcg = pc->mem_cgroup;
 		if (memcg && !css_tryget_online(&memcg->css))
@@ -2756,23 +2693,46 @@ struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
 			memcg = NULL;
 		rcu_read_unlock();
 	}
-	unlock_page_cgroup(pc);
 	return memcg;
 }
 
-static void __mem_cgroup_commit_charge(struct mem_cgroup *memcg,
-				       struct page *page,
-				       unsigned int nr_pages,
-				       enum charge_type ctype,
-				       bool lrucare)
+static void lock_page_lru(struct page *page, int *isolated)
+{
+	struct zone *zone = page_zone(page);
+
+	spin_lock_irq(&zone->lru_lock);
+	if (PageLRU(page)) {
+		struct lruvec *lruvec;
+
+		lruvec = mem_cgroup_page_lruvec(page, zone);
+		ClearPageLRU(page);
+		del_page_from_lru_list(page, lruvec, page_lru(page));
+		*isolated = 1;
+	} else
+		*isolated = 0;
+}
+
+static void unlock_page_lru(struct page *page, int isolated)
+{
+	struct zone *zone = page_zone(page);
+
+	if (isolated) {
+		struct lruvec *lruvec;
+
+		lruvec = mem_cgroup_page_lruvec(page, zone);
+		VM_BUG_ON_PAGE(PageLRU(page), page);
+		SetPageLRU(page);
+		add_page_to_lru_list(page, lruvec, page_lru(page));
+	}
+	spin_unlock_irq(&zone->lru_lock);
+}
+
+static void commit_charge(struct page *page, struct mem_cgroup *memcg,
+			  bool lrucare)
 {
 	struct page_cgroup *pc = lookup_page_cgroup(page);
-	struct zone *uninitialized_var(zone);
-	struct lruvec *lruvec;
-	bool was_on_lru = false;
-	bool anon;
+	int isolated;
 
-	lock_page_cgroup(pc);
 	VM_BUG_ON_PAGE(PageCgroupUsed(pc), page);
 	/*
 	 * we don't need page_cgroup_lock about tail pages, becase they are not
@@ -2783,44 +2743,28 @@ static void __mem_cgroup_commit_charge(struct mem_cgroup *memcg,
 	 * In some cases, SwapCache and FUSE(splice_buf->radixtree), the page
 	 * may already be on some other mem_cgroup's LRU.  Take care of it.
 	 */
-	if (lrucare) {
-		zone = page_zone(page);
-		spin_lock_irq(&zone->lru_lock);
-		if (PageLRU(page)) {
-			lruvec = mem_cgroup_zone_lruvec(zone, pc->mem_cgroup);
-			ClearPageLRU(page);
-			del_page_from_lru_list(page, lruvec, page_lru(page));
-			was_on_lru = true;
-		}
-	}
-
-	pc->mem_cgroup = memcg;
-	SetPageCgroupUsed(pc);
-
-	if (lrucare) {
-		if (was_on_lru) {
-			lruvec = mem_cgroup_zone_lruvec(zone, pc->mem_cgroup);
-			VM_BUG_ON_PAGE(PageLRU(page), page);
-			SetPageLRU(page);
-			add_page_to_lru_list(page, lruvec, page_lru(page));
-		}
-		spin_unlock_irq(&zone->lru_lock);
-	}
-
-	if (ctype == MEM_CGROUP_CHARGE_TYPE_ANON)
-		anon = true;
-	else
-		anon = false;
-
-	mem_cgroup_charge_statistics(memcg, page, anon, nr_pages);
-	unlock_page_cgroup(pc);
+	if (lrucare)
+		lock_page_lru(page, &isolated);
 
 	/*
-	 * "charge_statistics" updated event counter. Then, check it.
-	 * Insert ancestor (and ancestor's ancestors), to softlimit RB-tree.
-	 * if they exceeds softlimit.
+	 * Nobody should be changing or seriously looking at
+	 * pc->mem_cgroup and pc->flags at this point:
+	 *
+	 * - the page is uncharged
+	 *
+	 * - the page is off-LRU
+	 *
+	 * - an anonymous fault has exclusive page access, except for
+	 *   a locked page table
+	 *
+	 * - a page cache insertion, a swapin fault, or a migration
+	 *   have the page locked
 	 */
-	memcg_check_events(memcg, page);
+	pc->mem_cgroup = memcg;
+	pc->flags = PCG_USED | PCG_MEM | (do_swap_account ? PCG_MEMSW : 0);
+
+	if (lrucare)
+		unlock_page_lru(page, isolated);
 }
 
 static DEFINE_MUTEX(set_limit_mutex);
@@ -2882,21 +2826,21 @@ static int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp, u64 size)
 	if (ret)
 		return ret;
 
-	ret = mem_cgroup_try_charge(memcg, gfp, size >> PAGE_SHIFT);
+	ret = try_charge(memcg, gfp, size >> PAGE_SHIFT);
 	if (ret == -EINTR)  {
 		/*
-		 * mem_cgroup_try_charge() chosed to bypass to root due to
-		 * OOM kill or fatal signal.  Since our only options are to
-		 * either fail the allocation or charge it to this cgroup, do
-		 * it as a temporary condition. But we can't fail. From a
-		 * kmem/slab perspective, the cache has already been selected,
-		 * by mem_cgroup_kmem_get_cache(), so it is too late to change
+		 * try_charge() chose to bypass to root due to OOM kill or
+		 * fatal signal.  Since our only options are to either fail
+		 * the allocation or charge it to this cgroup, do it as a
+		 * temporary condition. But we can't fail. From a kmem/slab
+		 * perspective, the cache has already been selected, by
+		 * mem_cgroup_kmem_get_cache(), so it is too late to change
 		 * our minds.
 		 *
 		 * This condition will only trigger if the task entered
-		 * memcg_charge_kmem in a sane state, but was OOM-killed during
-		 * mem_cgroup_try_charge() above. Tasks that were already
-		 * dying when the allocation triggers should have been already
+		 * memcg_charge_kmem in a sane state, but was OOM-killed
+		 * during try_charge() above. Tasks that were already dying
+		 * when the allocation triggers should have been already
 		 * directed to the root cgroup in memcontrol.h
 		 */
 		res_counter_charge_nofail(&memcg->res, size, &fail_res);
@@ -3447,7 +3391,6 @@ static inline void memcg_unregister_all_caches(struct mem_cgroup *memcg)
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 
-#define PCGF_NOCOPY_AT_SPLIT (1 << PCG_LOCK | 1 << PCG_MIGRATION)
 /*
  * Because tail pages are not marked as "used", set it. We're under
  * zone->lru_lock, 'splitting on pmd' and compound_lock.
@@ -3468,7 +3411,7 @@ void mem_cgroup_split_huge_fixup(struct page *head)
 	for (i = 1; i < HPAGE_PMD_NR; i++) {
 		pc = head_pc + i;
 		pc->mem_cgroup = memcg;
-		pc->flags = head_pc->flags & ~PCGF_NOCOPY_AT_SPLIT;
+		pc->flags = head_pc->flags;
 	}
 	__this_cpu_sub(memcg->stat->count[MEM_CGROUP_STAT_RSS_HUGE],
 		       HPAGE_PMD_NR);
@@ -3498,7 +3441,6 @@ static int mem_cgroup_move_account(struct page *page,
 {
 	unsigned long flags;
 	int ret;
-	bool anon = PageAnon(page);
 
 	VM_BUG_ON(from == to);
 	VM_BUG_ON_PAGE(PageLRU(page), page);
@@ -3512,15 +3454,21 @@ static int mem_cgroup_move_account(struct page *page,
 	if (nr_pages > 1 && !PageTransHuge(page))
 		goto out;
 
-	lock_page_cgroup(pc);
+	/*
+	 * Prevent mem_cgroup_migrate() from looking at pc->mem_cgroup
+	 * of its source page while we change it: page migration takes
+	 * both pages off the LRU, but page cache replacement doesn't.
+	 */
+	if (!trylock_page(page))
+		goto out;
 
 	ret = -EINVAL;
 	if (!PageCgroupUsed(pc) || pc->mem_cgroup != from)
-		goto unlock;
+		goto out_unlock;
 
 	move_lock_mem_cgroup(from, &flags);
 
-	if (!anon && page_mapped(page)) {
+	if (!PageAnon(page) && page_mapped(page)) {
 		__this_cpu_sub(from->stat->count[MEM_CGROUP_STAT_FILE_MAPPED],
 			       nr_pages);
 		__this_cpu_add(to->stat->count[MEM_CGROUP_STAT_FILE_MAPPED],
@@ -3534,20 +3482,25 @@ static int mem_cgroup_move_account(struct page *page,
 			       nr_pages);
 	}
 
-	mem_cgroup_charge_statistics(from, page, anon, -nr_pages);
+	/*
+	 * It is safe to change pc->mem_cgroup here because the page
+	 * is referenced, charged, and isolated - we can't race with
+	 * uncharging, charging, migration, or LRU putback.
+	 */
 
 	/* caller should have done css_get */
 	pc->mem_cgroup = to;
-	mem_cgroup_charge_statistics(to, page, anon, nr_pages);
 	move_unlock_mem_cgroup(from, &flags);
 	ret = 0;
-unlock:
-	unlock_page_cgroup(pc);
-	/*
-	 * check events
-	 */
+
+	local_irq_disable();
+	mem_cgroup_charge_statistics(to, page, nr_pages);
 	memcg_check_events(to, page);
+	mem_cgroup_charge_statistics(from, page, -nr_pages);
 	memcg_check_events(from, page);
+	local_irq_enable();
+out_unlock:
+	unlock_page(page);
 out:
 	return ret;
 }
@@ -3618,449 +3571,12 @@ out:
 	return ret;
 }
 
-int mem_cgroup_charge_anon(struct page *page,
-			      struct mm_struct *mm, gfp_t gfp_mask)
-{
-	unsigned int nr_pages = 1;
-	struct mem_cgroup *memcg;
-
-	if (mem_cgroup_disabled())
-		return 0;
-
-	VM_BUG_ON_PAGE(page_mapped(page), page);
-	VM_BUG_ON_PAGE(page->mapping && !PageAnon(page), page);
-	VM_BUG_ON(!mm);
-
-	if (PageTransHuge(page)) {
-		nr_pages <<= compound_order(page);
-		VM_BUG_ON_PAGE(!PageTransHuge(page), page);
-	}
-
-	memcg = mem_cgroup_try_charge_mm(mm, gfp_mask, nr_pages);
-	if (!memcg)
-		return -ENOMEM;
-	__mem_cgroup_commit_charge(memcg, page, nr_pages,
-				   MEM_CGROUP_CHARGE_TYPE_ANON, false);
-	return 0;
-}
-
-/*
- * While swap-in, try_charge -> commit or cancel, the page is locked.
- * And when try_charge() successfully returns, one refcnt to memcg without
- * struct page_cgroup is acquired. This refcnt will be consumed by
- * "commit()" or removed by "cancel()"
- */
-static int __mem_cgroup_try_charge_swapin(struct mm_struct *mm,
-					  struct page *page,
-					  gfp_t mask,
-					  struct mem_cgroup **memcgp)
-{
-	struct mem_cgroup *memcg = NULL;
-	struct page_cgroup *pc;
-	int ret;
-
-	pc = lookup_page_cgroup(page);
-	/*
-	 * Every swap fault against a single page tries to charge the
-	 * page, bail as early as possible.  shmem_unuse() encounters
-	 * already charged pages, too.  The USED bit is protected by
-	 * the page lock, which serializes swap cache removal, which
-	 * in turn serializes uncharging.
-	 */
-	if (PageCgroupUsed(pc))
-		goto out;
-	if (do_swap_account)
-		memcg = try_get_mem_cgroup_from_page(page);
-	if (!memcg)
-		memcg = get_mem_cgroup_from_mm(mm);
-	ret = mem_cgroup_try_charge(memcg, mask, 1);
-	css_put(&memcg->css);
-	if (ret == -EINTR)
-		memcg = root_mem_cgroup;
-	else if (ret)
-		return ret;
-out:
-	*memcgp = memcg;
-	return 0;
-}
-
-int mem_cgroup_try_charge_swapin(struct mm_struct *mm, struct page *page,
-				 gfp_t gfp_mask, struct mem_cgroup **memcgp)
-{
-	if (mem_cgroup_disabled()) {
-		*memcgp = NULL;
-		return 0;
-	}
-	/*
-	 * A racing thread's fault, or swapoff, may have already
-	 * updated the pte, and even removed page from swap cache: in
-	 * those cases unuse_pte()'s pte_same() test will fail; but
-	 * there's also a KSM case which does need to charge the page.
-	 */
-	if (!PageSwapCache(page)) {
-		struct mem_cgroup *memcg;
-
-		memcg = mem_cgroup_try_charge_mm(mm, gfp_mask, 1);
-		if (!memcg)
-			return -ENOMEM;
-		*memcgp = memcg;
-		return 0;
-	}
-	return __mem_cgroup_try_charge_swapin(mm, page, gfp_mask, memcgp);
-}
-
-void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
-{
-	if (mem_cgroup_disabled())
-		return;
-	if (!memcg)
-		return;
-	__mem_cgroup_cancel_charge(memcg, 1);
-}
-
-static void
-__mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *memcg,
-					enum charge_type ctype)
-{
-	if (mem_cgroup_disabled())
-		return;
-	if (!memcg)
-		return;
-
-	__mem_cgroup_commit_charge(memcg, page, 1, ctype, true);
-	/*
-	 * Now swap is on-memory. This means this page may be
-	 * counted both as mem and swap....double count.
-	 * Fix it by uncharging from memsw. Basically, this SwapCache is stable
-	 * under lock_page(). But in do_swap_page()::memory.c, reuse_swap_page()
-	 * may call delete_from_swap_cache() before reach here.
-	 */
-	if (do_swap_account && PageSwapCache(page)) {
-		swp_entry_t ent = {.val = page_private(page)};
-		mem_cgroup_uncharge_swap(ent);
-	}
-}
-
-void mem_cgroup_commit_charge_swapin(struct page *page,
-				     struct mem_cgroup *memcg)
-{
-	__mem_cgroup_commit_charge_swapin(page, memcg,
-					  MEM_CGROUP_CHARGE_TYPE_ANON);
-}
-
-int mem_cgroup_charge_file(struct page *page, struct mm_struct *mm,
-				gfp_t gfp_mask)
-{
-	enum charge_type type = MEM_CGROUP_CHARGE_TYPE_CACHE;
-	struct mem_cgroup *memcg;
-	int ret;
-
-	if (mem_cgroup_disabled())
-		return 0;
-	if (PageCompound(page))
-		return 0;
-
-	if (PageSwapCache(page)) { /* shmem */
-		ret = __mem_cgroup_try_charge_swapin(mm, page,
-						     gfp_mask, &memcg);
-		if (ret)
-			return ret;
-		__mem_cgroup_commit_charge_swapin(page, memcg, type);
-		return 0;
-	}
-
-	memcg = mem_cgroup_try_charge_mm(mm, gfp_mask, 1);
-	if (!memcg)
-		return -ENOMEM;
-	__mem_cgroup_commit_charge(memcg, page, 1, type, false);
-	return 0;
-}
-
-static void mem_cgroup_do_uncharge(struct mem_cgroup *memcg,
-				   unsigned int nr_pages,
-				   const enum charge_type ctype)
-{
-	struct memcg_batch_info *batch = NULL;
-	bool uncharge_memsw = true;
-
-	/* If swapout, usage of swap doesn't decrease */
-	if (!do_swap_account || ctype == MEM_CGROUP_CHARGE_TYPE_SWAPOUT)
-		uncharge_memsw = false;
-
-	batch = &current->memcg_batch;
-	/*
-	 * In usual, we do css_get() when we remember memcg pointer.
-	 * But in this case, we keep res->usage until end of a series of
-	 * uncharges. Then, it's ok to ignore memcg's refcnt.
-	 */
-	if (!batch->memcg)
-		batch->memcg = memcg;
-	/*
-	 * do_batch > 0 when unmapping pages or inode invalidate/truncate.
-	 * In those cases, all pages freed continuously can be expected to be in
-	 * the same cgroup and we have chance to coalesce uncharges.
-	 * But we do uncharge one by one if this is killed by OOM(TIF_MEMDIE)
-	 * because we want to do uncharge as soon as possible.
-	 */
-
-	if (!batch->do_batch || test_thread_flag(TIF_MEMDIE))
-		goto direct_uncharge;
-
-	if (nr_pages > 1)
-		goto direct_uncharge;
-
-	/*
-	 * In typical case, batch->memcg == mem. This means we can
-	 * merge a series of uncharges to an uncharge of res_counter.
-	 * If not, we uncharge res_counter ony by one.
-	 */
-	if (batch->memcg != memcg)
-		goto direct_uncharge;
-	/* remember freed charge and uncharge it later */
-	batch->nr_pages++;
-	if (uncharge_memsw)
-		batch->memsw_nr_pages++;
-	return;
-direct_uncharge:
-	res_counter_uncharge(&memcg->res, nr_pages * PAGE_SIZE);
-	if (uncharge_memsw)
-		res_counter_uncharge(&memcg->memsw, nr_pages * PAGE_SIZE);
-	if (unlikely(batch->memcg != memcg))
-		memcg_oom_recover(memcg);
-}
-
-/*
- * uncharge if !page_mapped(page)
- */
-static struct mem_cgroup *
-__mem_cgroup_uncharge_common(struct page *page, enum charge_type ctype,
-			     bool end_migration)
-{
-	struct mem_cgroup *memcg = NULL;
-	unsigned int nr_pages = 1;
-	struct page_cgroup *pc;
-	bool anon;
-
-	if (mem_cgroup_disabled())
-		return NULL;
-
-	if (PageTransHuge(page)) {
-		nr_pages <<= compound_order(page);
-		VM_BUG_ON_PAGE(!PageTransHuge(page), page);
-	}
-	/*
-	 * Check if our page_cgroup is valid
-	 */
-	pc = lookup_page_cgroup(page);
-	if (unlikely(!PageCgroupUsed(pc)))
-		return NULL;
-
-	lock_page_cgroup(pc);
-
-	memcg = pc->mem_cgroup;
-
-	if (!PageCgroupUsed(pc))
-		goto unlock_out;
-
-	anon = PageAnon(page);
-
-	switch (ctype) {
-	case MEM_CGROUP_CHARGE_TYPE_ANON:
-		/*
-		 * Generally PageAnon tells if it's the anon statistics to be
-		 * updated; but sometimes e.g. mem_cgroup_uncharge_page() is
-		 * used before page reached the stage of being marked PageAnon.
-		 */
-		anon = true;
-		/* fallthrough */
-	case MEM_CGROUP_CHARGE_TYPE_DROP:
-		/* See mem_cgroup_prepare_migration() */
-		if (page_mapped(page))
-			goto unlock_out;
-		/*
-		 * Pages under migration may not be uncharged.  But
-		 * end_migration() /must/ be the one uncharging the
-		 * unused post-migration page and so it has to call
-		 * here with the migration bit still set.  See the
-		 * res_counter handling below.
-		 */
-		if (!end_migration && PageCgroupMigration(pc))
-			goto unlock_out;
-		break;
-	case MEM_CGROUP_CHARGE_TYPE_SWAPOUT:
-		if (!PageAnon(page)) {	/* Shared memory */
-			if (page->mapping && !page_is_file_cache(page))
-				goto unlock_out;
-		} else if (page_mapped(page)) /* Anon */
-				goto unlock_out;
-		break;
-	default:
-		break;
-	}
-
-	mem_cgroup_charge_statistics(memcg, page, anon, -nr_pages);
-
-	ClearPageCgroupUsed(pc);
-	/*
-	 * pc->mem_cgroup is not cleared here. It will be accessed when it's
-	 * freed from LRU. This is safe because uncharged page is expected not
-	 * to be reused (freed soon). Exception is SwapCache, it's handled by
-	 * special functions.
-	 */
-
-	unlock_page_cgroup(pc);
-	/*
-	 * even after unlock, we have memcg->res.usage here and this memcg
-	 * will never be freed, so it's safe to call css_get().
-	 */
-	memcg_check_events(memcg, page);
-	if (do_swap_account && ctype == MEM_CGROUP_CHARGE_TYPE_SWAPOUT) {
-		mem_cgroup_swap_statistics(memcg, true);
-		css_get(&memcg->css);
-	}
-	/*
-	 * Migration does not charge the res_counter for the
-	 * replacement page, so leave it alone when phasing out the
-	 * page that is unused after the migration.
-	 */
-	if (!end_migration)
-		mem_cgroup_do_uncharge(memcg, nr_pages, ctype);
-
-	return memcg;
-
-unlock_out:
-	unlock_page_cgroup(pc);
-	return NULL;
-}
-
-void mem_cgroup_uncharge_page(struct page *page)
-{
-	/* early check. */
-	if (page_mapped(page))
-		return;
-	VM_BUG_ON_PAGE(page->mapping && !PageAnon(page), page);
-	/*
-	 * If the page is in swap cache, uncharge should be deferred
-	 * to the swap path, which also properly accounts swap usage
-	 * and handles memcg lifetime.
-	 *
-	 * Note that this check is not stable and reclaim may add the
-	 * page to swap cache at any time after this.  However, if the
-	 * page is not in swap cache by the time page->mapcount hits
-	 * 0, there won't be any page table references to the swap
-	 * slot, and reclaim will free it and not actually write the
-	 * page to disk.
-	 */
-	if (PageSwapCache(page))
-		return;
-	__mem_cgroup_uncharge_common(page, MEM_CGROUP_CHARGE_TYPE_ANON, false);
-}
-
-void mem_cgroup_uncharge_cache_page(struct page *page)
-{
-	VM_BUG_ON_PAGE(page_mapped(page), page);
-	VM_BUG_ON_PAGE(page->mapping, page);
-	__mem_cgroup_uncharge_common(page, MEM_CGROUP_CHARGE_TYPE_CACHE, false);
-}
-
-/*
- * Batch_start/batch_end is called in unmap_page_range/invlidate/trucate.
- * In that cases, pages are freed continuously and we can expect pages
- * are in the same memcg. All these calls itself limits the number of
- * pages freed at once, then uncharge_start/end() is called properly.
- * This may be called prural(2) times in a context,
- */
-
-void mem_cgroup_uncharge_start(void)
-{
-	current->memcg_batch.do_batch++;
-	/* We can do nest. */
-	if (current->memcg_batch.do_batch == 1) {
-		current->memcg_batch.memcg = NULL;
-		current->memcg_batch.nr_pages = 0;
-		current->memcg_batch.memsw_nr_pages = 0;
-	}
-}
-
-void mem_cgroup_uncharge_end(void)
-{
-	struct memcg_batch_info *batch = &current->memcg_batch;
-
-	if (!batch->do_batch)
-		return;
-
-	batch->do_batch--;
-	if (batch->do_batch) /* If stacked, do nothing. */
-		return;
-
-	if (!batch->memcg)
-		return;
-	/*
-	 * This "batch->memcg" is valid without any css_get/put etc...
-	 * bacause we hide charges behind us.
-	 */
-	if (batch->nr_pages)
-		res_counter_uncharge(&batch->memcg->res,
-				     batch->nr_pages * PAGE_SIZE);
-	if (batch->memsw_nr_pages)
-		res_counter_uncharge(&batch->memcg->memsw,
-				     batch->memsw_nr_pages * PAGE_SIZE);
-	memcg_oom_recover(batch->memcg);
-	/* forget this pointer (for sanity check) */
-	batch->memcg = NULL;
-}
-
-#ifdef CONFIG_SWAP
-/*
- * called after __delete_from_swap_cache() and drop "page" account.
- * memcg information is recorded to swap_cgroup of "ent"
- */
-void
-mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent, bool swapout)
-{
-	struct mem_cgroup *memcg;
-	int ctype = MEM_CGROUP_CHARGE_TYPE_SWAPOUT;
-
-	if (!swapout) /* this was a swap cache but the swap is unused ! */
-		ctype = MEM_CGROUP_CHARGE_TYPE_DROP;
-
-	memcg = __mem_cgroup_uncharge_common(page, ctype, false);
-
-	/*
-	 * record memcg information,  if swapout && memcg != NULL,
-	 * css_get() was called in uncharge().
-	 */
-	if (do_swap_account && swapout && memcg)
-		swap_cgroup_record(ent, mem_cgroup_id(memcg));
-}
-#endif
-
 #ifdef CONFIG_MEMCG_SWAP
-/*
- * called from swap_entry_free(). remove record in swap_cgroup and
- * uncharge "memsw" account.
- */
-void mem_cgroup_uncharge_swap(swp_entry_t ent)
+static void mem_cgroup_swap_statistics(struct mem_cgroup *memcg,
+					 bool charge)
 {
-	struct mem_cgroup *memcg;
-	unsigned short id;
-
-	if (!do_swap_account)
-		return;
-
-	id = swap_cgroup_record(ent, 0);
-	rcu_read_lock();
-	memcg = mem_cgroup_lookup(id);
-	if (memcg) {
-		/*
-		 * We uncharge this because swap is freed.  This memcg can
-		 * be obsolete one. We avoid calling css_tryget_online().
-		 */
-		res_counter_uncharge(&memcg->memsw, PAGE_SIZE);
-		mem_cgroup_swap_statistics(memcg, false);
-		css_put(&memcg->css);
-	}
-	rcu_read_unlock();
+	int val = (charge) ? 1 : -1;
+	this_cpu_add(memcg->stat->count[MEM_CGROUP_STAT_SWAP], val);
 }
 
 /**
@@ -4112,175 +3628,6 @@ static inline int mem_cgroup_move_swap_account(swp_entry_t entry,
 }
 #endif
 
-/*
- * Before starting migration, account PAGE_SIZE to mem_cgroup that the old
- * page belongs to.
- */
-void mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
-				  struct mem_cgroup **memcgp)
-{
-	struct mem_cgroup *memcg = NULL;
-	unsigned int nr_pages = 1;
-	struct page_cgroup *pc;
-	enum charge_type ctype;
-
-	*memcgp = NULL;
-
-	if (mem_cgroup_disabled())
-		return;
-
-	if (PageTransHuge(page))
-		nr_pages <<= compound_order(page);
-
-	pc = lookup_page_cgroup(page);
-	lock_page_cgroup(pc);
-	if (PageCgroupUsed(pc)) {
-		memcg = pc->mem_cgroup;
-		css_get(&memcg->css);
-		/*
-		 * At migrating an anonymous page, its mapcount goes down
-		 * to 0 and uncharge() will be called. But, even if it's fully
-		 * unmapped, migration may fail and this page has to be
-		 * charged again. We set MIGRATION flag here and delay uncharge
-		 * until end_migration() is called
-		 *
-		 * Corner Case Thinking
-		 * A)
-		 * When the old page was mapped as Anon and it's unmap-and-freed
-		 * while migration was ongoing.
-		 * If unmap finds the old page, uncharge() of it will be delayed
-		 * until end_migration(). If unmap finds a new page, it's
-		 * uncharged when it make mapcount to be 1->0. If unmap code
-		 * finds swap_migration_entry, the new page will not be mapped
-		 * and end_migration() will find it(mapcount==0).
-		 *
-		 * B)
-		 * When the old page was mapped but migraion fails, the kernel
-		 * remaps it. A charge for it is kept by MIGRATION flag even
-		 * if mapcount goes down to 0. We can do remap successfully
-		 * without charging it again.
-		 *
-		 * C)
-		 * The "old" page is under lock_page() until the end of
-		 * migration, so, the old page itself will not be swapped-out.
-		 * If the new page is swapped out before end_migraton, our
-		 * hook to usual swap-out path will catch the event.
-		 */
-		if (PageAnon(page))
-			SetPageCgroupMigration(pc);
-	}
-	unlock_page_cgroup(pc);
-	/*
-	 * If the page is not charged at this point,
-	 * we return here.
-	 */
-	if (!memcg)
-		return;
-
-	*memcgp = memcg;
-	/*
-	 * We charge new page before it's used/mapped. So, even if unlock_page()
-	 * is called before end_migration, we can catch all events on this new
-	 * page. In the case new page is migrated but not remapped, new page's
-	 * mapcount will be finally 0 and we call uncharge in end_migration().
-	 */
-	if (PageAnon(page))
-		ctype = MEM_CGROUP_CHARGE_TYPE_ANON;
-	else
-		ctype = MEM_CGROUP_CHARGE_TYPE_CACHE;
-	/*
-	 * The page is committed to the memcg, but it's not actually
-	 * charged to the res_counter since we plan on replacing the
-	 * old one and only one page is going to be left afterwards.
-	 */
-	__mem_cgroup_commit_charge(memcg, newpage, nr_pages, ctype, false);
-}
-
-/* remove redundant charge if migration failed*/
-void mem_cgroup_end_migration(struct mem_cgroup *memcg,
-	struct page *oldpage, struct page *newpage, bool migration_ok)
-{
-	struct page *used, *unused;
-	struct page_cgroup *pc;
-	bool anon;
-
-	if (!memcg)
-		return;
-
-	if (!migration_ok) {
-		used = oldpage;
-		unused = newpage;
-	} else {
-		used = newpage;
-		unused = oldpage;
-	}
-	anon = PageAnon(used);
-	__mem_cgroup_uncharge_common(unused,
-				     anon ? MEM_CGROUP_CHARGE_TYPE_ANON
-				     : MEM_CGROUP_CHARGE_TYPE_CACHE,
-				     true);
-	css_put(&memcg->css);
-	/*
-	 * We disallowed uncharge of pages under migration because mapcount
-	 * of the page goes down to zero, temporarly.
-	 * Clear the flag and check the page should be charged.
-	 */
-	pc = lookup_page_cgroup(oldpage);
-	lock_page_cgroup(pc);
-	ClearPageCgroupMigration(pc);
-	unlock_page_cgroup(pc);
-
-	/*
-	 * If a page is a file cache, radix-tree replacement is very atomic
-	 * and we can skip this check. When it was an Anon page, its mapcount
-	 * goes down to 0. But because we added MIGRATION flage, it's not
-	 * uncharged yet. There are several case but page->mapcount check
-	 * and USED bit check in mem_cgroup_uncharge_page() will do enough
-	 * check. (see prepare_charge() also)
-	 */
-	if (anon)
-		mem_cgroup_uncharge_page(used);
-}
-
-/*
- * At replace page cache, newpage is not under any memcg but it's on
- * LRU. So, this function doesn't touch res_counter but handles LRU
- * in correct way. Both pages are locked so we cannot race with uncharge.
- */
-void mem_cgroup_replace_page_cache(struct page *oldpage,
-				  struct page *newpage)
-{
-	struct mem_cgroup *memcg = NULL;
-	struct page_cgroup *pc;
-	enum charge_type type = MEM_CGROUP_CHARGE_TYPE_CACHE;
-
-	if (mem_cgroup_disabled())
-		return;
-
-	pc = lookup_page_cgroup(oldpage);
-	/* fix accounting on old pages */
-	lock_page_cgroup(pc);
-	if (PageCgroupUsed(pc)) {
-		memcg = pc->mem_cgroup;
-		mem_cgroup_charge_statistics(memcg, oldpage, false, -1);
-		ClearPageCgroupUsed(pc);
-	}
-	unlock_page_cgroup(pc);
-
-	/*
-	 * When called from shmem_replace_page(), in some cases the
-	 * oldpage has already been charged, and in some cases not.
-	 */
-	if (!memcg)
-		return;
-	/*
-	 * Even if newpage->mapping was NULL before starting replacement,
-	 * the newpage may be on LRU(or pagevec for LRU) already. We lock
-	 * LRU while we overwrite pc->mem_cgroup.
-	 */
-	__mem_cgroup_commit_charge(memcg, newpage, 1, type, true);
-}
-
 #ifdef CONFIG_DEBUG_VM
 static struct page_cgroup *lookup_page_cgroup_used(struct page *page)
 {
@@ -4479,7 +3826,7 @@ unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
 						    gfp_mask, &nr_scanned);
 		nr_reclaimed += reclaimed;
 		*total_scanned += nr_scanned;
-		spin_lock(&mctz->lock);
+		spin_lock_irq(&mctz->lock);
 
 		/*
 		 * If we failed to reclaim anything from this memory cgroup
@@ -4519,7 +3866,7 @@ unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
 		 */
 		/* If excess == 0, no tree ops */
 		__mem_cgroup_insert_exceeded(mz, mctz, excess);
-		spin_unlock(&mctz->lock);
+		spin_unlock_irq(&mctz->lock);
 		css_put(&mz->memcg->css);
 		loop++;
 		/*
@@ -6319,20 +5666,19 @@ static int mem_cgroup_do_precharge(unsigned long count)
 	int ret;
 
 	/* Try a single bulk charge without reclaim first */
-	ret = mem_cgroup_try_charge(mc.to, GFP_KERNEL & ~__GFP_WAIT, count);
+	ret = try_charge(mc.to, GFP_KERNEL & ~__GFP_WAIT, count);
 	if (!ret) {
 		mc.precharge += count;
 		return ret;
 	}
 	if (ret == -EINTR) {
-		__mem_cgroup_cancel_charge(root_mem_cgroup, count);
+		cancel_charge(root_mem_cgroup, count);
 		return ret;
 	}
 
 	/* Try charges one by one with reclaim */
 	while (count--) {
-		ret = mem_cgroup_try_charge(mc.to,
-					    GFP_KERNEL & ~__GFP_NORETRY, 1);
+		ret = try_charge(mc.to, GFP_KERNEL & ~__GFP_NORETRY, 1);
 		/*
 		 * In case of failure, any residual charges against
 		 * mc.to will be dropped by mem_cgroup_clear_mc()
@@ -6340,7 +5686,7 @@ static int mem_cgroup_do_precharge(unsigned long count)
 		 * bypassed to root right away or they'll be lost.
 		 */
 		if (ret == -EINTR)
-			__mem_cgroup_cancel_charge(root_mem_cgroup, 1);
+			cancel_charge(root_mem_cgroup, 1);
 		if (ret)
 			return ret;
 		mc.precharge++;
@@ -6482,9 +5828,9 @@ static enum mc_target_type get_mctgt_type(struct vm_area_struct *vma,
 	if (page) {
 		pc = lookup_page_cgroup(page);
 		/*
-		 * Do only loose check w/o page_cgroup lock.
-		 * mem_cgroup_move_account() checks the pc is valid or not under
-		 * the lock.
+		 * Do only loose check w/o serialization.
+		 * mem_cgroup_move_account() checks the pc is valid or
+		 * not under LRU exclusion.
 		 */
 		if (PageCgroupUsed(pc) && pc->mem_cgroup == mc.from) {
 			ret = MC_TARGET_PAGE;
@@ -6609,7 +5955,7 @@ static void __mem_cgroup_clear_mc(void)
 
 	/* we must uncharge all the leftover precharges from mc.to */
 	if (mc.precharge) {
-		__mem_cgroup_cancel_charge(mc.to, mc.precharge);
+		cancel_charge(mc.to, mc.precharge);
 		mc.precharge = 0;
 	}
 	/*
@@ -6617,7 +5963,7 @@ static void __mem_cgroup_clear_mc(void)
 	 * we must uncharge here.
 	 */
 	if (mc.moved_charge) {
-		__mem_cgroup_cancel_charge(mc.from, mc.moved_charge);
+		cancel_charge(mc.from, mc.moved_charge);
 		mc.moved_charge = 0;
 	}
 	/* we must fixup refcnts and charges */
@@ -6946,6 +6292,398 @@ static void __init enable_swap_cgroup(void)
 }
 #endif
 
+#ifdef CONFIG_MEMCG_SWAP
+/**
+ * mem_cgroup_swapout - transfer a memsw charge to swap
+ * @page: page whose memsw charge to transfer
+ * @entry: swap entry to move the charge to
+ *
+ * Transfer the memsw charge of @page to @entry.
+ */
+void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
+{
+	struct page_cgroup *pc;
+	unsigned short oldid;
+
+	VM_BUG_ON_PAGE(PageLRU(page), page);
+	VM_BUG_ON_PAGE(page_count(page), page);
+
+	if (!do_swap_account)
+		return;
+
+	pc = lookup_page_cgroup(page);
+
+	/* Readahead page, never charged */
+	if (!PageCgroupUsed(pc))
+		return;
+
+	VM_BUG_ON_PAGE(!(pc->flags & PCG_MEMSW), page);
+
+	oldid = swap_cgroup_record(entry, mem_cgroup_id(pc->mem_cgroup));
+	VM_BUG_ON_PAGE(oldid, page);
+
+	pc->flags &= ~PCG_MEMSW;
+	css_get(&pc->mem_cgroup->css);
+	mem_cgroup_swap_statistics(pc->mem_cgroup, true);
+}
+
+/**
+ * mem_cgroup_uncharge_swap - uncharge a swap entry
+ * @entry: swap entry to uncharge
+ *
+ * Drop the memsw charge associated with @entry.
+ */
+void mem_cgroup_uncharge_swap(swp_entry_t entry)
+{
+	struct mem_cgroup *memcg;
+	unsigned short id;
+
+	if (!do_swap_account)
+		return;
+
+	id = swap_cgroup_record(entry, 0);
+	rcu_read_lock();
+	memcg = mem_cgroup_lookup(id);
+	if (memcg) {
+		res_counter_uncharge(&memcg->memsw, PAGE_SIZE);
+		mem_cgroup_swap_statistics(memcg, false);
+		css_put(&memcg->css);
+	}
+	rcu_read_unlock();
+}
+#endif
+
+/**
+ * mem_cgroup_try_charge - try charging a page
+ * @page: page to charge
+ * @mm: mm context of the victim
+ * @gfp_mask: reclaim mode
+ * @memcgp: charged memcg return
+ *
+ * Try to charge @page to the memcg that @mm belongs to, reclaiming
+ * pages according to @gfp_mask if necessary.
+ *
+ * Returns 0 on success, with *@memcgp pointing to the charged memcg.
+ * Otherwise, an error code is returned.
+ *
+ * After page->mapping has been set up, the caller must finalize the
+ * charge with mem_cgroup_commit_charge().  Or abort the transaction
+ * with mem_cgroup_cancel_charge() in case page instantiation fails.
+ */
+int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
+			  gfp_t gfp_mask, struct mem_cgroup **memcgp)
+{
+	struct mem_cgroup *memcg = NULL;
+	unsigned int nr_pages = 1;
+	int ret = 0;
+
+	if (mem_cgroup_disabled())
+		goto out;
+
+	if (PageSwapCache(page)) {
+		struct page_cgroup *pc = lookup_page_cgroup(page);
+		/*
+		 * Every swap fault against a single page tries to charge the
+		 * page, bail as early as possible.  shmem_unuse() encounters
+		 * already charged pages, too.  The USED bit is protected by
+		 * the page lock, which serializes swap cache removal, which
+		 * in turn serializes uncharging.
+		 */
+		if (PageCgroupUsed(pc))
+			goto out;
+	}
+
+	if (PageTransHuge(page)) {
+		nr_pages <<= compound_order(page);
+		VM_BUG_ON_PAGE(!PageTransHuge(page), page);
+	}
+
+	if (do_swap_account && PageSwapCache(page))
+		memcg = try_get_mem_cgroup_from_page(page);
+	if (!memcg)
+		memcg = get_mem_cgroup_from_mm(mm);
+
+	ret = try_charge(memcg, gfp_mask, nr_pages);
+
+	css_put(&memcg->css);
+
+	if (ret == -EINTR) {
+		memcg = root_mem_cgroup;
+		ret = 0;
+	}
+out:
+	*memcgp = memcg;
+	return ret;
+}
+
+/**
+ * mem_cgroup_commit_charge - commit a page charge
+ * @page: page to charge
+ * @memcg: memcg to charge the page to
+ * @lrucare: page might be on LRU already
+ *
+ * Finalize a charge transaction started by mem_cgroup_try_charge(),
+ * after page->mapping has been set up.  This must happen atomically
+ * as part of the page instantiation, i.e. under the page table lock
+ * for anonymous pages, under the page lock for page and swap cache.
+ *
+ * In addition, the page must not be on the LRU during the commit, to
+ * prevent racing with task migration.  If it might be, use @lrucare.
+ *
+ * Use mem_cgroup_cancel_charge() to cancel the transaction instead.
+ */
+void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
+			      bool lrucare)
+{
+	unsigned int nr_pages = 1;
+
+	VM_BUG_ON_PAGE(!page->mapping, page);
+	VM_BUG_ON_PAGE(PageLRU(page) && !lrucare, page);
+
+	if (mem_cgroup_disabled())
+		return;
+	/*
+	 * Swap faults will attempt to charge the same page multiple
+	 * times.  But reuse_swap_page() might have removed the page
+	 * from swapcache already, so we can't check PageSwapCache().
+	 */
+	if (!memcg)
+		return;
+
+	commit_charge(page, memcg, lrucare);
+
+	if (PageTransHuge(page)) {
+		nr_pages <<= compound_order(page);
+		VM_BUG_ON_PAGE(!PageTransHuge(page), page);
+	}
+
+	local_irq_disable();
+	mem_cgroup_charge_statistics(memcg, page, nr_pages);
+	memcg_check_events(memcg, page);
+	local_irq_enable();
+
+	if (do_swap_account && PageSwapCache(page)) {
+		swp_entry_t entry = { .val = page_private(page) };
+		/*
+		 * The swap entry might not get freed for a long time,
+		 * let's not wait for it.  The page already received a
+		 * memory+swap charge, drop the swap entry duplicate.
+		 */
+		mem_cgroup_uncharge_swap(entry);
+	}
+}
+
+/**
+ * mem_cgroup_cancel_charge - cancel a page charge
+ * @page: page to charge
+ * @memcg: memcg to charge the page to
+ *
+ * Cancel a charge transaction started by mem_cgroup_try_charge().
+ */
+void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg)
+{
+	unsigned int nr_pages = 1;
+
+	if (mem_cgroup_disabled())
+		return;
+	/*
+	 * Swap faults will attempt to charge the same page multiple
+	 * times.  But reuse_swap_page() might have removed the page
+	 * from swapcache already, so we can't check PageSwapCache().
+	 */
+	if (!memcg)
+		return;
+
+	if (PageTransHuge(page)) {
+		nr_pages <<= compound_order(page);
+		VM_BUG_ON_PAGE(!PageTransHuge(page), page);
+	}
+
+	cancel_charge(memcg, nr_pages);
+}
+
+static void uncharge_batch(struct mem_cgroup *memcg, unsigned long pgpgout,
+			   unsigned long nr_mem, unsigned long nr_memsw,
+			   unsigned long nr_anon, unsigned long nr_file,
+			   unsigned long nr_huge, struct page *dummy_page)
+{
+	unsigned long flags;
+
+	if (nr_mem)
+		res_counter_uncharge(&memcg->res, nr_mem * PAGE_SIZE);
+	if (nr_memsw)
+		res_counter_uncharge(&memcg->memsw, nr_memsw * PAGE_SIZE);
+
+	memcg_oom_recover(memcg);
+
+	local_irq_save(flags);
+	__this_cpu_sub(memcg->stat->count[MEM_CGROUP_STAT_RSS], nr_anon);
+	__this_cpu_sub(memcg->stat->count[MEM_CGROUP_STAT_CACHE], nr_file);
+	__this_cpu_sub(memcg->stat->count[MEM_CGROUP_STAT_RSS_HUGE], nr_huge);
+	__this_cpu_add(memcg->stat->events[MEM_CGROUP_EVENTS_PGPGOUT], pgpgout);
+	__this_cpu_add(memcg->stat->nr_page_events, nr_anon + nr_file);
+	memcg_check_events(memcg, dummy_page);
+	local_irq_restore(flags);
+}
+
+static void uncharge_list(struct list_head *page_list)
+{
+	struct mem_cgroup *memcg = NULL;
+	unsigned long nr_memsw = 0;
+	unsigned long nr_anon = 0;
+	unsigned long nr_file = 0;
+	unsigned long nr_huge = 0;
+	unsigned long pgpgout = 0;
+	unsigned long nr_mem = 0;
+	struct list_head *next;
+	struct page *page;
+
+	next = page_list->next;
+	do {
+		unsigned int nr_pages = 1;
+		struct page_cgroup *pc;
+
+		page = list_entry(next, struct page, lru);
+		next = page->lru.next;
+
+		VM_BUG_ON_PAGE(PageLRU(page), page);
+		VM_BUG_ON_PAGE(page_count(page), page);
+
+		pc = lookup_page_cgroup(page);
+		if (!PageCgroupUsed(pc))
+			continue;
+
+		/*
+		 * Nobody should be changing or seriously looking at
+		 * pc->mem_cgroup and pc->flags at this point, we have
+		 * fully exclusive access to the page.
+		 */
+
+		if (memcg != pc->mem_cgroup) {
+			if (memcg) {
+				uncharge_batch(memcg, pgpgout, nr_mem, nr_memsw,
+					       nr_anon, nr_file, nr_huge, page);
+				pgpgout = nr_mem = nr_memsw = 0;
+				nr_anon = nr_file = nr_huge = 0;
+			}
+			memcg = pc->mem_cgroup;
+		}
+
+		if (PageTransHuge(page)) {
+			nr_pages <<= compound_order(page);
+			VM_BUG_ON_PAGE(!PageTransHuge(page), page);
+			nr_huge += nr_pages;
+		}
+
+		if (PageAnon(page))
+			nr_anon += nr_pages;
+		else
+			nr_file += nr_pages;
+
+		if (pc->flags & PCG_MEM)
+			nr_mem += nr_pages;
+		if (pc->flags & PCG_MEMSW)
+			nr_memsw += nr_pages;
+		pc->flags = 0;
+
+		pgpgout++;
+	} while (next != page_list);
+
+	if (memcg)
+		uncharge_batch(memcg, pgpgout, nr_mem, nr_memsw,
+			       nr_anon, nr_file, nr_huge, page);
+}
+
+/**
+ * mem_cgroup_uncharge - uncharge a page
+ * @page: page to uncharge
+ *
+ * Uncharge a page previously charged with mem_cgroup_try_charge() and
+ * mem_cgroup_commit_charge().
+ */
+void mem_cgroup_uncharge(struct page *page)
+{
+	struct page_cgroup *pc;
+
+	if (mem_cgroup_disabled())
+		return;
+
+	/* Don't touch page->lru of any random page, pre-check: */
+	pc = lookup_page_cgroup(page);
+	if (!PageCgroupUsed(pc))
+		return;
+
+	INIT_LIST_HEAD(&page->lru);
+	uncharge_list(&page->lru);
+}
+
+/**
+ * mem_cgroup_uncharge_list - uncharge a list of page
+ * @page_list: list of pages to uncharge
+ *
+ * Uncharge a list of pages previously charged with
+ * mem_cgroup_try_charge() and mem_cgroup_commit_charge().
+ */
+void mem_cgroup_uncharge_list(struct list_head *page_list)
+{
+	if (mem_cgroup_disabled())
+		return;
+
+	if (!list_empty(page_list))
+		uncharge_list(page_list);
+}
+
+/**
+ * mem_cgroup_migrate - migrate a charge to another page
+ * @oldpage: currently charged page
+ * @newpage: page to transfer the charge to
+ * @lrucare: both pages might be on the LRU already
+ *
+ * Migrate the charge from @oldpage to @newpage.
+ *
+ * Both pages must be locked, @newpage->mapping must be set up.
+ */
+void mem_cgroup_migrate(struct page *oldpage, struct page *newpage,
+			bool lrucare)
+{
+	struct page_cgroup *pc;
+	int isolated;
+
+	VM_BUG_ON_PAGE(!PageLocked(oldpage), oldpage);
+	VM_BUG_ON_PAGE(!PageLocked(newpage), newpage);
+	VM_BUG_ON_PAGE(!lrucare && PageLRU(oldpage), oldpage);
+	VM_BUG_ON_PAGE(!lrucare && PageLRU(newpage), newpage);
+	VM_BUG_ON_PAGE(PageAnon(oldpage) != PageAnon(newpage), newpage);
+	VM_BUG_ON_PAGE(PageTransHuge(oldpage) != PageTransHuge(newpage),
+		       newpage);
+
+	if (mem_cgroup_disabled())
+		return;
+
+	/* Page cache replacement: new page already charged? */
+	pc = lookup_page_cgroup(newpage);
+	if (PageCgroupUsed(pc))
+		return;
+
+	/* Re-entrant migration: old page already uncharged? */
+	pc = lookup_page_cgroup(oldpage);
+	if (!PageCgroupUsed(pc))
+		return;
+
+	VM_BUG_ON_PAGE(!(pc->flags & PCG_MEM), oldpage);
+	VM_BUG_ON_PAGE(do_swap_account && !(pc->flags & PCG_MEMSW), oldpage);
+
+	if (lrucare)
+		lock_page_lru(oldpage, &isolated);
+
+	pc->flags = 0;
+
+	if (lrucare)
+		unlock_page_lru(oldpage, isolated);
+
+	commit_charge(newpage, pc->mem_cgroup, lrucare);
+}
+
 /*
  * subsys_initcall() for memory controller.
  *
diff --git a/mm/memory.c b/mm/memory.c
index 5c55270729f7..ab3537bcfed2 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1292,7 +1292,6 @@ static void unmap_page_range(struct mmu_gather *tlb,
 		details = NULL;
 
 	BUG_ON(addr >= end);
-	mem_cgroup_uncharge_start();
 	tlb_start_vma(tlb, vma);
 	pgd = pgd_offset(vma->vm_mm, addr);
 	do {
@@ -1302,7 +1301,6 @@ static void unmap_page_range(struct mmu_gather *tlb,
 		next = zap_pud_range(tlb, vma, pgd, addr, next, details);
 	} while (pgd++, addr = next, addr != end);
 	tlb_end_vma(tlb, vma);
-	mem_cgroup_uncharge_end();
 }
 
 
@@ -2049,6 +2047,7 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
 	struct page *dirty_page = NULL;
 	unsigned long mmun_start = 0;	/* For mmu_notifiers */
 	unsigned long mmun_end = 0;	/* For mmu_notifiers */
+	struct mem_cgroup *memcg;
 
 	old_page = vm_normal_page(vma, address, orig_pte);
 	if (!old_page) {
@@ -2204,7 +2203,7 @@ gotten:
 	}
 	__SetPageUptodate(new_page);
 
-	if (mem_cgroup_charge_anon(new_page, mm, GFP_KERNEL))
+	if (mem_cgroup_try_charge(new_page, mm, GFP_KERNEL, &memcg))
 		goto oom_free_new;
 
 	mmun_start  = address & PAGE_MASK;
@@ -2234,6 +2233,8 @@ gotten:
 		 */
 		ptep_clear_flush(vma, address, page_table);
 		page_add_new_anon_rmap(new_page, vma, address);
+		mem_cgroup_commit_charge(new_page, memcg, false);
+		lru_cache_add_active_or_unevictable(new_page, vma);
 		/*
 		 * We call the notify macro here because, when using secondary
 		 * mmu page tables (such as kvm shadow page tables), we want the
@@ -2271,7 +2272,7 @@ gotten:
 		new_page = old_page;
 		ret |= VM_FAULT_WRITE;
 	} else
-		mem_cgroup_uncharge_page(new_page);
+		mem_cgroup_cancel_charge(new_page, memcg);
 
 	if (new_page)
 		page_cache_release(new_page);
@@ -2410,10 +2411,10 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
 {
 	spinlock_t *ptl;
 	struct page *page, *swapcache;
+	struct mem_cgroup *memcg;
 	swp_entry_t entry;
 	pte_t pte;
 	int locked;
-	struct mem_cgroup *ptr;
 	int exclusive = 0;
 	int ret = 0;
 
@@ -2489,7 +2490,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
 		goto out_page;
 	}
 
-	if (mem_cgroup_try_charge_swapin(mm, page, GFP_KERNEL, &ptr)) {
+	if (mem_cgroup_try_charge(page, mm, GFP_KERNEL, &memcg)) {
 		ret = VM_FAULT_OOM;
 		goto out_page;
 	}
@@ -2514,10 +2515,6 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
 	 * while the page is counted on swap but not yet in mapcount i.e.
 	 * before page_add_anon_rmap() and swap_free(); try_to_free_swap()
 	 * must be called after the swap_free(), or it will never succeed.
-	 * Because delete_from_swap_page() may be called by reuse_swap_page(),
-	 * mem_cgroup_commit_charge_swapin() may not be able to find swp_entry
-	 * in page->private. In this case, a record in swap_cgroup  is silently
-	 * discarded at swap_free().
 	 */
 
 	inc_mm_counter_fast(mm, MM_ANONPAGES);
@@ -2533,12 +2530,14 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
 	if (pte_swp_soft_dirty(orig_pte))
 		pte = pte_mksoft_dirty(pte);
 	set_pte_at(mm, address, page_table, pte);
-	if (page == swapcache)
+	if (page == swapcache) {
 		do_page_add_anon_rmap(page, vma, address, exclusive);
-	else /* ksm created a completely new copy */
+		mem_cgroup_commit_charge(page, memcg, true);
+	} else { /* ksm created a completely new copy */
 		page_add_new_anon_rmap(page, vma, address);
-	/* It's better to call commit-charge after rmap is established */
-	mem_cgroup_commit_charge_swapin(page, ptr);
+		mem_cgroup_commit_charge(page, memcg, false);
+		lru_cache_add_active_or_unevictable(page, vma);
+	}
 
 	swap_free(entry);
 	if (vm_swap_full() || (vma->vm_flags & VM_LOCKED) || PageMlocked(page))
@@ -2571,7 +2570,7 @@ unlock:
 out:
 	return ret;
 out_nomap:
-	mem_cgroup_cancel_charge_swapin(ptr);
+	mem_cgroup_cancel_charge(page, memcg);
 	pte_unmap_unlock(page_table, ptl);
 out_page:
 	unlock_page(page);
@@ -2627,6 +2626,7 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
 		unsigned long address, pte_t *page_table, pmd_t *pmd,
 		unsigned int flags)
 {
+	struct mem_cgroup *memcg;
 	struct page *page;
 	spinlock_t *ptl;
 	pte_t entry;
@@ -2660,7 +2660,7 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
 	 */
 	__SetPageUptodate(page);
 
-	if (mem_cgroup_charge_anon(page, mm, GFP_KERNEL))
+	if (mem_cgroup_try_charge(page, mm, GFP_KERNEL, &memcg))
 		goto oom_free_page;
 
 	entry = mk_pte(page, vma->vm_page_prot);
@@ -2673,6 +2673,8 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
 
 	inc_mm_counter_fast(mm, MM_ANONPAGES);
 	page_add_new_anon_rmap(page, vma, address);
+	mem_cgroup_commit_charge(page, memcg, false);
+	lru_cache_add_active_or_unevictable(page, vma);
 setpte:
 	set_pte_at(mm, address, page_table, entry);
 
@@ -2682,7 +2684,7 @@ unlock:
 	pte_unmap_unlock(page_table, ptl);
 	return 0;
 release:
-	mem_cgroup_uncharge_page(page);
+	mem_cgroup_cancel_charge(page, memcg);
 	page_cache_release(page);
 	goto unlock;
 oom_free_page:
@@ -2919,6 +2921,7 @@ static int do_cow_fault(struct mm_struct *mm, struct vm_area_struct *vma,
 		pgoff_t pgoff, unsigned int flags, pte_t orig_pte)
 {
 	struct page *fault_page, *new_page;
+	struct mem_cgroup *memcg;
 	spinlock_t *ptl;
 	pte_t *pte;
 	int ret;
@@ -2930,7 +2933,7 @@ static int do_cow_fault(struct mm_struct *mm, struct vm_area_struct *vma,
 	if (!new_page)
 		return VM_FAULT_OOM;
 
-	if (mem_cgroup_charge_anon(new_page, mm, GFP_KERNEL)) {
+	if (mem_cgroup_try_charge(new_page, mm, GFP_KERNEL, &memcg)) {
 		page_cache_release(new_page);
 		return VM_FAULT_OOM;
 	}
@@ -2950,12 +2953,14 @@ static int do_cow_fault(struct mm_struct *mm, struct vm_area_struct *vma,
 		goto uncharge_out;
 	}
 	do_set_pte(vma, address, new_page, pte, true, true);
+	mem_cgroup_commit_charge(new_page, memcg, false);
+	lru_cache_add_active_or_unevictable(new_page, vma);
 	pte_unmap_unlock(pte, ptl);
 	unlock_page(fault_page);
 	page_cache_release(fault_page);
 	return ret;
 uncharge_out:
-	mem_cgroup_uncharge_page(new_page);
+	mem_cgroup_cancel_charge(new_page, memcg);
 	page_cache_release(new_page);
 	return ret;
 }
@@ -3425,44 +3430,6 @@ int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address)
 }
 #endif /* __PAGETABLE_PMD_FOLDED */
 
-#if !defined(__HAVE_ARCH_GATE_AREA)
-
-#if defined(AT_SYSINFO_EHDR)
-static struct vm_area_struct gate_vma;
-
-static int __init gate_vma_init(void)
-{
-	gate_vma.vm_mm = NULL;
-	gate_vma.vm_start = FIXADDR_USER_START;
-	gate_vma.vm_end = FIXADDR_USER_END;
-	gate_vma.vm_flags = VM_READ | VM_MAYREAD | VM_EXEC | VM_MAYEXEC;
-	gate_vma.vm_page_prot = __P101;
-
-	return 0;
-}
-__initcall(gate_vma_init);
-#endif
-
-struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
-{
-#ifdef AT_SYSINFO_EHDR
-	return &gate_vma;
-#else
-	return NULL;
-#endif
-}
-
-int in_gate_area_no_mm(unsigned long addr)
-{
-#ifdef AT_SYSINFO_EHDR
-	if ((addr >= FIXADDR_USER_START) && (addr < FIXADDR_USER_END))
-		return 1;
-#endif
-	return 0;
-}
-
-#endif	/* __HAVE_ARCH_GATE_AREA */
-
 static int __follow_pte(struct mm_struct *mm, unsigned long address,
 		pte_t **ptepp, spinlock_t **ptlp)
 {
diff --git a/mm/migrate.c b/mm/migrate.c
index be6dbf995c0c..f78ec9bd454d 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -780,6 +780,7 @@ static int move_to_new_page(struct page *newpage, struct page *page,
 	if (rc != MIGRATEPAGE_SUCCESS) {
 		newpage->mapping = NULL;
 	} else {
+		mem_cgroup_migrate(page, newpage, false);
 		if (remap_swapcache)
 			remove_migration_ptes(page, newpage);
 		page->mapping = NULL;
@@ -795,7 +796,6 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
 {
 	int rc = -EAGAIN;
 	int remap_swapcache = 1;
-	struct mem_cgroup *mem;
 	struct anon_vma *anon_vma = NULL;
 
 	if (!trylock_page(page)) {
@@ -821,9 +821,6 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
 		lock_page(page);
 	}
 
-	/* charge against new page */
-	mem_cgroup_prepare_migration(page, newpage, &mem);
-
 	if (PageWriteback(page)) {
 		/*
 		 * Only in the case of a full synchronous migration is it
@@ -833,10 +830,10 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
 		 */
 		if (mode != MIGRATE_SYNC) {
 			rc = -EBUSY;
-			goto uncharge;
+			goto out_unlock;
 		}
 		if (!force)
-			goto uncharge;
+			goto out_unlock;
 		wait_on_page_writeback(page);
 	}
 	/*
@@ -872,7 +869,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
 			 */
 			remap_swapcache = 0;
 		} else {
-			goto uncharge;
+			goto out_unlock;
 		}
 	}
 
@@ -885,7 +882,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
 		 * the page migration right away (proteced by page lock).
 		 */
 		rc = balloon_page_migrate(newpage, page, mode);
-		goto uncharge;
+		goto out_unlock;
 	}
 
 	/*
@@ -904,7 +901,7 @@ static int __unmap_and_move(struct page *page, struct page *newpage,
 		VM_BUG_ON_PAGE(PageAnon(page), page);
 		if (page_has_private(page)) {
 			try_to_free_buffers(page);
-			goto uncharge;
+			goto out_unlock;
 		}
 		goto skip_unmap;
 	}
@@ -923,10 +920,7 @@ skip_unmap:
 	if (anon_vma)
 		put_anon_vma(anon_vma);
 
-uncharge:
-	mem_cgroup_end_migration(mem, page, newpage,
-				 (rc == MIGRATEPAGE_SUCCESS ||
-				  rc == MIGRATEPAGE_BALLOON_SUCCESS));
+out_unlock:
 	unlock_page(page);
 out:
 	return rc;
@@ -1786,7 +1780,6 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm,
 	pg_data_t *pgdat = NODE_DATA(node);
 	int isolated = 0;
 	struct page *new_page = NULL;
-	struct mem_cgroup *memcg = NULL;
 	int page_lru = page_is_file_cache(page);
 	unsigned long mmun_start = address & HPAGE_PMD_MASK;
 	unsigned long mmun_end = mmun_start + HPAGE_PMD_SIZE;
@@ -1852,15 +1845,6 @@ fail_putback:
 		goto out_unlock;
 	}
 
-	/*
-	 * Traditional migration needs to prepare the memcg charge
-	 * transaction early to prevent the old page from being
-	 * uncharged when installing migration entries.  Here we can
-	 * save the potential rollback and start the charge transfer
-	 * only when migration is already known to end successfully.
-	 */
-	mem_cgroup_prepare_migration(page, new_page, &memcg);
-
 	orig_entry = *pmd;
 	entry = mk_pmd(new_page, vma->vm_page_prot);
 	entry = pmd_mkhuge(entry);
@@ -1888,14 +1872,10 @@ fail_putback:
 		goto fail_putback;
 	}
 
+	mem_cgroup_migrate(page, new_page, false);
+
 	page_remove_rmap(page);
 
-	/*
-	 * Finish the charge transaction under the page table lock to
-	 * prevent split_huge_page() from dividing up the charge
-	 * before it's fully transferred to the new page.
-	 */
-	mem_cgroup_end_migration(memcg, page, new_page, true);
 	spin_unlock(ptl);
 	mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
 
diff --git a/mm/mmap.c b/mm/mmap.c
index 64c9d736155c..c1f2ea4a0b99 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -221,7 +221,7 @@ static void __remove_shared_vm_struct(struct vm_area_struct *vma,
 	if (vma->vm_flags & VM_DENYWRITE)
 		atomic_inc(&file_inode(file)->i_writecount);
 	if (vma->vm_flags & VM_SHARED)
-		mapping->i_mmap_writable--;
+		mapping_unmap_writable(mapping);
 
 	flush_dcache_mmap_lock(mapping);
 	if (unlikely(vma->vm_flags & VM_NONLINEAR))
@@ -622,7 +622,7 @@ static void __vma_link_file(struct vm_area_struct *vma)
 		if (vma->vm_flags & VM_DENYWRITE)
 			atomic_dec(&file_inode(file)->i_writecount);
 		if (vma->vm_flags & VM_SHARED)
-			mapping->i_mmap_writable++;
+			atomic_inc(&mapping->i_mmap_writable);
 
 		flush_dcache_mmap_lock(mapping);
 		if (unlikely(vma->vm_flags & VM_NONLINEAR))
@@ -1577,6 +1577,17 @@ munmap_back:
 			if (error)
 				goto free_vma;
 		}
+		if (vm_flags & VM_SHARED) {
+			error = mapping_map_writable(file->f_mapping);
+			if (error)
+				goto allow_write_and_free_vma;
+		}
+
+		/* ->mmap() can change vma->vm_file, but must guarantee that
+		 * vma_link() below can deny write-access if VM_DENYWRITE is set
+		 * and map writably if VM_SHARED is set. This usually means the
+		 * new file must not have been exposed to user-space, yet.
+		 */
 		vma->vm_file = get_file(file);
 		error = file->f_op->mmap(file, vma);
 		if (error)
@@ -1616,8 +1627,12 @@ munmap_back:
 
 	vma_link(mm, vma, prev, rb_link, rb_parent);
 	/* Once vma denies write, undo our temporary denial count */
-	if (vm_flags & VM_DENYWRITE)
-		allow_write_access(file);
+	if (file) {
+		if (vm_flags & VM_SHARED)
+			mapping_unmap_writable(file->f_mapping);
+		if (vm_flags & VM_DENYWRITE)
+			allow_write_access(file);
+	}
 	file = vma->vm_file;
 out:
 	perf_event_mmap(vma);
@@ -1646,14 +1661,17 @@ out:
 	return addr;
 
 unmap_and_free_vma:
-	if (vm_flags & VM_DENYWRITE)
-		allow_write_access(file);
 	vma->vm_file = NULL;
 	fput(file);
 
 	/* Undo any partial mapping done by a device driver. */
 	unmap_region(mm, vma, prev, vma->vm_start, vma->vm_end);
 	charged = 0;
+	if (vm_flags & VM_SHARED)
+		mapping_unmap_writable(file->f_mapping);
+allow_write_and_free_vma:
+	if (vm_flags & VM_DENYWRITE)
+		allow_write_access(file);
 free_vma:
 	kmem_cache_free(vm_area_cachep, vma);
 unacct_error:
diff --git a/mm/nommu.c b/mm/nommu.c
index 4a852f6c5709..a881d9673c6b 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1981,11 +1981,6 @@ error:
 	return -ENOMEM;
 }
 
-int in_gate_area_no_mm(unsigned long addr)
-{
-	return 0;
-}
-
 int filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
 	BUG();
diff --git a/mm/rmap.c b/mm/rmap.c
index 22a4a7699cdb..3e8491c504f8 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1032,25 +1032,6 @@ void page_add_new_anon_rmap(struct page *page,
 	__mod_zone_page_state(page_zone(page), NR_ANON_PAGES,
 			hpage_nr_pages(page));
 	__page_set_anon_rmap(page, vma, address, 1);
-
-	VM_BUG_ON_PAGE(PageLRU(page), page);
-	if (likely((vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) != VM_LOCKED)) {
-		SetPageActive(page);
-		lru_cache_add(page);
-		return;
-	}
-
-	if (!TestSetPageMlocked(page)) {
-		/*
-		 * We use the irq-unsafe __mod_zone_page_stat because this
-		 * counter is not modified from interrupt context, and the pte
-		 * lock is held(spinlock), which implies preemption disabled.
-		 */
-		__mod_zone_page_state(page_zone(page), NR_MLOCK,
-				    hpage_nr_pages(page));
-		count_vm_event(UNEVICTABLE_PGMLOCKED);
-	}
-	add_page_to_unevictable_list(page);
 }
 
 /**
@@ -1108,7 +1089,6 @@ void page_remove_rmap(struct page *page)
 	if (unlikely(PageHuge(page)))
 		goto out;
 	if (anon) {
-		mem_cgroup_uncharge_page(page);
 		if (PageTransHuge(page))
 			__dec_zone_page_state(page,
 					      NR_ANON_TRANSPARENT_HUGEPAGES);
diff --git a/mm/shmem.c b/mm/shmem.c
index 302d1cf7ad07..a42add14331c 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -66,6 +66,9 @@ static struct vfsmount *shm_mnt;
 #include <linux/highmem.h>
 #include <linux/seq_file.h>
 #include <linux/magic.h>
+#include <linux/syscalls.h>
+#include <linux/fcntl.h>
+#include <uapi/linux/memfd.h>
 
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
@@ -419,7 +422,6 @@ static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend,
 			pvec.pages, indices);
 		if (!pvec.nr)
 			break;
-		mem_cgroup_uncharge_start();
 		for (i = 0; i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];
 
@@ -447,7 +449,6 @@ static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend,
 		}
 		pagevec_remove_exceptionals(&pvec);
 		pagevec_release(&pvec);
-		mem_cgroup_uncharge_end();
 		cond_resched();
 		index++;
 	}
@@ -495,7 +496,6 @@ static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend,
 			index = start;
 			continue;
 		}
-		mem_cgroup_uncharge_start();
 		for (i = 0; i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];
 
@@ -531,7 +531,6 @@ static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend,
 		}
 		pagevec_remove_exceptionals(&pvec);
 		pagevec_release(&pvec);
-		mem_cgroup_uncharge_end();
 		index++;
 	}
 
@@ -551,6 +550,7 @@ EXPORT_SYMBOL_GPL(shmem_truncate_range);
 static int shmem_setattr(struct dentry *dentry, struct iattr *attr)
 {
 	struct inode *inode = dentry->d_inode;
+	struct shmem_inode_info *info = SHMEM_I(inode);
 	int error;
 
 	error = inode_change_ok(inode, attr);
@@ -561,6 +561,11 @@ static int shmem_setattr(struct dentry *dentry, struct iattr *attr)
 		loff_t oldsize = inode->i_size;
 		loff_t newsize = attr->ia_size;
 
+		/* protected by i_mutex */
+		if ((newsize < oldsize && (info->seals & F_SEAL_SHRINK)) ||
+		    (newsize > oldsize && (info->seals & F_SEAL_GROW)))
+			return -EPERM;
+
 		if (newsize != oldsize) {
 			error = shmem_reacct_size(SHMEM_I(inode)->flags,
 					oldsize, newsize);
@@ -621,7 +626,7 @@ static int shmem_unuse_inode(struct shmem_inode_info *info,
 	radswap = swp_to_radix_entry(swap);
 	index = radix_tree_locate_item(&mapping->page_tree, radswap);
 	if (index == -1)
-		return 0;
+		return -EAGAIN;	/* tell shmem_unuse we found nothing */
 
 	/*
 	 * Move _head_ to start search for next from here.
@@ -680,7 +685,6 @@ static int shmem_unuse_inode(struct shmem_inode_info *info,
 			spin_unlock(&info->lock);
 			swap_free(swap);
 		}
-		error = 1;	/* not an error, but entry was found */
 	}
 	return error;
 }
@@ -692,7 +696,7 @@ int shmem_unuse(swp_entry_t swap, struct page *page)
 {
 	struct list_head *this, *next;
 	struct shmem_inode_info *info;
-	int found = 0;
+	struct mem_cgroup *memcg;
 	int error = 0;
 
 	/*
@@ -707,26 +711,32 @@ int shmem_unuse(swp_entry_t swap, struct page *page)
 	 * the shmem_swaplist_mutex which might hold up shmem_writepage().
 	 * Charged back to the user (not to caller) when swap account is used.
 	 */
-	error = mem_cgroup_charge_file(page, current->mm, GFP_KERNEL);
+	error = mem_cgroup_try_charge(page, current->mm, GFP_KERNEL, &memcg);
 	if (error)
 		goto out;
 	/* No radix_tree_preload: swap entry keeps a place for page in tree */
+	error = -EAGAIN;
 
 	mutex_lock(&shmem_swaplist_mutex);
 	list_for_each_safe(this, next, &shmem_swaplist) {
 		info = list_entry(this, struct shmem_inode_info, swaplist);
 		if (info->swapped)
-			found = shmem_unuse_inode(info, swap, &page);
+			error = shmem_unuse_inode(info, swap, &page);
 		else
 			list_del_init(&info->swaplist);
 		cond_resched();
-		if (found)
+		if (error != -EAGAIN)
 			break;
+		/* found nothing in this: move on to search the next */
 	}
 	mutex_unlock(&shmem_swaplist_mutex);
 
-	if (found < 0)
-		error = found;
+	if (error) {
+		if (error != -ENOMEM)
+			error = 0;
+		mem_cgroup_cancel_charge(page, memcg);
+	} else
+		mem_cgroup_commit_charge(page, memcg, true);
 out:
 	unlock_page(page);
 	page_cache_release(page);
@@ -830,7 +840,7 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc)
 	}
 
 	mutex_unlock(&shmem_swaplist_mutex);
-	swapcache_free(swap, NULL);
+	swapcache_free(swap);
 redirty:
 	set_page_dirty(page);
 	if (wbc->for_reclaim)
@@ -1003,7 +1013,7 @@ static int shmem_replace_page(struct page **pagep, gfp_t gfp,
 		 */
 		oldpage = newpage;
 	} else {
-		mem_cgroup_replace_page_cache(oldpage, newpage);
+		mem_cgroup_migrate(oldpage, newpage, false);
 		lru_cache_add_anon(newpage);
 		*pagep = newpage;
 	}
@@ -1030,6 +1040,7 @@ static int shmem_getpage_gfp(struct inode *inode, pgoff_t index,
 	struct address_space *mapping = inode->i_mapping;
 	struct shmem_inode_info *info;
 	struct shmem_sb_info *sbinfo;
+	struct mem_cgroup *memcg;
 	struct page *page;
 	swp_entry_t swap;
 	int error;
@@ -1108,8 +1119,7 @@ repeat:
 				goto failed;
 		}
 
-		error = mem_cgroup_charge_file(page, current->mm,
-						gfp & GFP_RECLAIM_MASK);
+		error = mem_cgroup_try_charge(page, current->mm, gfp, &memcg);
 		if (!error) {
 			error = shmem_add_to_page_cache(page, mapping, index,
 						swp_to_radix_entry(swap));
@@ -1125,12 +1135,16 @@ repeat:
 			 * Reset swap.val? No, leave it so "failed" goes back to
 			 * "repeat": reading a hole and writing should succeed.
 			 */
-			if (error)
+			if (error) {
+				mem_cgroup_cancel_charge(page, memcg);
 				delete_from_swap_cache(page);
+			}
 		}
 		if (error)
 			goto failed;
 
+		mem_cgroup_commit_charge(page, memcg, true);
+
 		spin_lock(&info->lock);
 		info->swapped--;
 		shmem_recalc_inode(inode);
@@ -1168,8 +1182,7 @@ repeat:
 		if (sgp == SGP_WRITE)
 			__SetPageReferenced(page);
 
-		error = mem_cgroup_charge_file(page, current->mm,
-						gfp & GFP_RECLAIM_MASK);
+		error = mem_cgroup_try_charge(page, current->mm, gfp, &memcg);
 		if (error)
 			goto decused;
 		error = radix_tree_maybe_preload(gfp & GFP_RECLAIM_MASK);
@@ -1179,9 +1192,10 @@ repeat:
 			radix_tree_preload_end();
 		}
 		if (error) {
-			mem_cgroup_uncharge_cache_page(page);
+			mem_cgroup_cancel_charge(page, memcg);
 			goto decused;
 		}
+		mem_cgroup_commit_charge(page, memcg, false);
 		lru_cache_add_anon(page);
 
 		spin_lock(&info->lock);
@@ -1407,6 +1421,7 @@ static struct inode *shmem_get_inode(struct super_block *sb, const struct inode
 		info = SHMEM_I(inode);
 		memset(info, 0, (char *)inode - (char *)info);
 		spin_lock_init(&info->lock);
+		info->seals = F_SEAL_SEAL;
 		info->flags = flags & VM_NORESERVE;
 		INIT_LIST_HEAD(&info->swaplist);
 		simple_xattrs_init(&info->xattrs);
@@ -1465,7 +1480,17 @@ shmem_write_begin(struct file *file, struct address_space *mapping,
 			struct page **pagep, void **fsdata)
 {
 	struct inode *inode = mapping->host;
+	struct shmem_inode_info *info = SHMEM_I(inode);
 	pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+
+	/* i_mutex is held by caller */
+	if (unlikely(info->seals)) {
+		if (info->seals & F_SEAL_WRITE)
+			return -EPERM;
+		if ((info->seals & F_SEAL_GROW) && pos + len > inode->i_size)
+			return -EPERM;
+	}
+
 	return shmem_getpage(inode, index, pagep, SGP_WRITE, NULL);
 }
 
@@ -1803,11 +1828,233 @@ static loff_t shmem_file_llseek(struct file *file, loff_t offset, int whence)
 	return offset;
 }
 
+/*
+ * We need a tag: a new tag would expand every radix_tree_node by 8 bytes,
+ * so reuse a tag which we firmly believe is never set or cleared on shmem.
+ */
+#define SHMEM_TAG_PINNED        PAGECACHE_TAG_TOWRITE
+#define LAST_SCAN               4       /* about 150ms max */
+
+static void shmem_tag_pins(struct address_space *mapping)
+{
+	struct radix_tree_iter iter;
+	void **slot;
+	pgoff_t start;
+	struct page *page;
+
+	lru_add_drain();
+	start = 0;
+	rcu_read_lock();
+
+restart:
+	radix_tree_for_each_slot(slot, &mapping->page_tree, &iter, start) {
+		page = radix_tree_deref_slot(slot);
+		if (!page || radix_tree_exception(page)) {
+			if (radix_tree_deref_retry(page))
+				goto restart;
+		} else if (page_count(page) - page_mapcount(page) > 1) {
+			spin_lock_irq(&mapping->tree_lock);
+			radix_tree_tag_set(&mapping->page_tree, iter.index,
+					   SHMEM_TAG_PINNED);
+			spin_unlock_irq(&mapping->tree_lock);
+		}
+
+		if (need_resched()) {
+			cond_resched_rcu();
+			start = iter.index + 1;
+			goto restart;
+		}
+	}
+	rcu_read_unlock();
+}
+
+/*
+ * Setting SEAL_WRITE requires us to verify there's no pending writer. However,
+ * via get_user_pages(), drivers might have some pending I/O without any active
+ * user-space mappings (eg., direct-IO, AIO). Therefore, we look at all pages
+ * and see whether it has an elevated ref-count. If so, we tag them and wait for
+ * them to be dropped.
+ * The caller must guarantee that no new user will acquire writable references
+ * to those pages to avoid races.
+ */
+static int shmem_wait_for_pins(struct address_space *mapping)
+{
+	struct radix_tree_iter iter;
+	void **slot;
+	pgoff_t start;
+	struct page *page;
+	int error, scan;
+
+	shmem_tag_pins(mapping);
+
+	error = 0;
+	for (scan = 0; scan <= LAST_SCAN; scan++) {
+		if (!radix_tree_tagged(&mapping->page_tree, SHMEM_TAG_PINNED))
+			break;
+
+		if (!scan)
+			lru_add_drain_all();
+		else if (schedule_timeout_killable((HZ << scan) / 200))
+			scan = LAST_SCAN;
+
+		start = 0;
+		rcu_read_lock();
+restart:
+		radix_tree_for_each_tagged(slot, &mapping->page_tree, &iter,
+					   start, SHMEM_TAG_PINNED) {
+
+			page = radix_tree_deref_slot(slot);
+			if (radix_tree_exception(page)) {
+				if (radix_tree_deref_retry(page))
+					goto restart;
+
+				page = NULL;
+			}
+
+			if (page &&
+			    page_count(page) - page_mapcount(page) != 1) {
+				if (scan < LAST_SCAN)
+					goto continue_resched;
+
+				/*
+				 * On the last scan, we clean up all those tags
+				 * we inserted; but make a note that we still
+				 * found pages pinned.
+				 */
+				error = -EBUSY;
+			}
+
+			spin_lock_irq(&mapping->tree_lock);
+			radix_tree_tag_clear(&mapping->page_tree,
+					     iter.index, SHMEM_TAG_PINNED);
+			spin_unlock_irq(&mapping->tree_lock);
+continue_resched:
+			if (need_resched()) {
+				cond_resched_rcu();
+				start = iter.index + 1;
+				goto restart;
+			}
+		}
+		rcu_read_unlock();
+	}
+
+	return error;
+}
+
+#define F_ALL_SEALS (F_SEAL_SEAL | \
+		     F_SEAL_SHRINK | \
+		     F_SEAL_GROW | \
+		     F_SEAL_WRITE)
+
+int shmem_add_seals(struct file *file, unsigned int seals)
+{
+	struct inode *inode = file_inode(file);
+	struct shmem_inode_info *info = SHMEM_I(inode);
+	int error;
+
+	/*
+	 * SEALING
+	 * Sealing allows multiple parties to share a shmem-file but restrict
+	 * access to a specific subset of file operations. Seals can only be
+	 * added, but never removed. This way, mutually untrusted parties can
+	 * share common memory regions with a well-defined policy. A malicious
+	 * peer can thus never perform unwanted operations on a shared object.
+	 *
+	 * Seals are only supported on special shmem-files and always affect
+	 * the whole underlying inode. Once a seal is set, it may prevent some
+	 * kinds of access to the file. Currently, the following seals are
+	 * defined:
+	 *   SEAL_SEAL: Prevent further seals from being set on this file
+	 *   SEAL_SHRINK: Prevent the file from shrinking
+	 *   SEAL_GROW: Prevent the file from growing
+	 *   SEAL_WRITE: Prevent write access to the file
+	 *
+	 * As we don't require any trust relationship between two parties, we
+	 * must prevent seals from being removed. Therefore, sealing a file
+	 * only adds a given set of seals to the file, it never touches
+	 * existing seals. Furthermore, the "setting seals"-operation can be
+	 * sealed itself, which basically prevents any further seal from being
+	 * added.
+	 *
+	 * Semantics of sealing are only defined on volatile files. Only
+	 * anonymous shmem files support sealing. More importantly, seals are
+	 * never written to disk. Therefore, there's no plan to support it on
+	 * other file types.
+	 */
+
+	if (file->f_op != &shmem_file_operations)
+		return -EINVAL;
+	if (!(file->f_mode & FMODE_WRITE))
+		return -EPERM;
+	if (seals & ~(unsigned int)F_ALL_SEALS)
+		return -EINVAL;
+
+	mutex_lock(&inode->i_mutex);
+
+	if (info->seals & F_SEAL_SEAL) {
+		error = -EPERM;
+		goto unlock;
+	}
+
+	if ((seals & F_SEAL_WRITE) && !(info->seals & F_SEAL_WRITE)) {
+		error = mapping_deny_writable(file->f_mapping);
+		if (error)
+			goto unlock;
+
+		error = shmem_wait_for_pins(file->f_mapping);
+		if (error) {
+			mapping_allow_writable(file->f_mapping);
+			goto unlock;
+		}
+	}
+
+	info->seals |= seals;
+	error = 0;
+
+unlock:
+	mutex_unlock(&inode->i_mutex);
+	return error;
+}
+EXPORT_SYMBOL_GPL(shmem_add_seals);
+
+int shmem_get_seals(struct file *file)
+{
+	if (file->f_op != &shmem_file_operations)
+		return -EINVAL;
+
+	return SHMEM_I(file_inode(file))->seals;
+}
+EXPORT_SYMBOL_GPL(shmem_get_seals);
+
+long shmem_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	long error;
+
+	switch (cmd) {
+	case F_ADD_SEALS:
+		/* disallow upper 32bit */
+		if (arg > UINT_MAX)
+			return -EINVAL;
+
+		error = shmem_add_seals(file, arg);
+		break;
+	case F_GET_SEALS:
+		error = shmem_get_seals(file);
+		break;
+	default:
+		error = -EINVAL;
+		break;
+	}
+
+	return error;
+}
+
 static long shmem_fallocate(struct file *file, int mode, loff_t offset,
 							 loff_t len)
 {
 	struct inode *inode = file_inode(file);
 	struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
+	struct shmem_inode_info *info = SHMEM_I(inode);
 	struct shmem_falloc shmem_falloc;
 	pgoff_t start, index, end;
 	int error;
@@ -1823,6 +2070,12 @@ static long shmem_fallocate(struct file *file, int mode, loff_t offset,
 		loff_t unmap_end = round_down(offset + len, PAGE_SIZE) - 1;
 		DECLARE_WAIT_QUEUE_HEAD_ONSTACK(shmem_falloc_waitq);
 
+		/* protected by i_mutex */
+		if (info->seals & F_SEAL_WRITE) {
+			error = -EPERM;
+			goto out;
+		}
+
 		shmem_falloc.waitq = &shmem_falloc_waitq;
 		shmem_falloc.start = unmap_start >> PAGE_SHIFT;
 		shmem_falloc.next = (unmap_end + 1) >> PAGE_SHIFT;
@@ -1849,6 +2102,11 @@ static long shmem_fallocate(struct file *file, int mode, loff_t offset,
 	if (error)
 		goto out;
 
+	if ((info->seals & F_SEAL_GROW) && offset + len > inode->i_size) {
+		error = -EPERM;
+		goto out;
+	}
+
 	start = offset >> PAGE_CACHE_SHIFT;
 	end = (offset + len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
 	/* Try to avoid a swapstorm if len is impossible to satisfy */
@@ -2584,6 +2842,77 @@ static int shmem_show_options(struct seq_file *seq, struct dentry *root)
 	shmem_show_mpol(seq, sbinfo->mpol);
 	return 0;
 }
+
+#define MFD_NAME_PREFIX "memfd:"
+#define MFD_NAME_PREFIX_LEN (sizeof(MFD_NAME_PREFIX) - 1)
+#define MFD_NAME_MAX_LEN (NAME_MAX - MFD_NAME_PREFIX_LEN)
+
+#define MFD_ALL_FLAGS (MFD_CLOEXEC | MFD_ALLOW_SEALING)
+
+SYSCALL_DEFINE2(memfd_create,
+		const char __user *, uname,
+		unsigned int, flags)
+{
+	struct shmem_inode_info *info;
+	struct file *file;
+	int fd, error;
+	char *name;
+	long len;
+
+	if (flags & ~(unsigned int)MFD_ALL_FLAGS)
+		return -EINVAL;
+
+	/* length includes terminating zero */
+	len = strnlen_user(uname, MFD_NAME_MAX_LEN + 1);
+	if (len <= 0)
+		return -EFAULT;
+	if (len > MFD_NAME_MAX_LEN + 1)
+		return -EINVAL;
+
+	name = kmalloc(len + MFD_NAME_PREFIX_LEN, GFP_TEMPORARY);
+	if (!name)
+		return -ENOMEM;
+
+	strcpy(name, MFD_NAME_PREFIX);
+	if (copy_from_user(&name[MFD_NAME_PREFIX_LEN], uname, len)) {
+		error = -EFAULT;
+		goto err_name;
+	}
+
+	/* terminating-zero may have changed after strnlen_user() returned */
+	if (name[len + MFD_NAME_PREFIX_LEN - 1]) {
+		error = -EFAULT;
+		goto err_name;
+	}
+
+	fd = get_unused_fd_flags((flags & MFD_CLOEXEC) ? O_CLOEXEC : 0);
+	if (fd < 0) {
+		error = fd;
+		goto err_name;
+	}
+
+	file = shmem_file_setup(name, 0, VM_NORESERVE);
+	if (IS_ERR(file)) {
+		error = PTR_ERR(file);
+		goto err_fd;
+	}
+	info = SHMEM_I(file_inode(file));
+	file->f_mode |= FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE;
+	file->f_flags |= O_RDWR | O_LARGEFILE;
+	if (flags & MFD_ALLOW_SEALING)
+		info->seals &= ~F_SEAL_SEAL;
+
+	fd_install(fd, file);
+	kfree(name);
+	return fd;
+
+err_fd:
+	put_unused_fd(fd);
+err_name:
+	kfree(name);
+	return error;
+}
+
 #endif /* CONFIG_TMPFS */
 
 static void shmem_put_super(struct super_block *sb)
diff --git a/mm/slab.c b/mm/slab.c
index 2e60bf3dedbb..a467b308c682 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -470,6 +470,8 @@ static struct kmem_cache kmem_cache_boot = {
 	.name = "kmem_cache",
 };
 
+#define BAD_ALIEN_MAGIC 0x01020304ul
+
 static DEFINE_PER_CPU(struct delayed_work, slab_reap_work);
 
 static inline struct array_cache *cpu_cache_get(struct kmem_cache *cachep)
@@ -836,7 +838,7 @@ static int transfer_objects(struct array_cache *to,
 static inline struct alien_cache **alloc_alien_cache(int node,
 						int limit, gfp_t gfp)
 {
-	return NULL;
+	return (struct alien_cache **)BAD_ALIEN_MAGIC;
 }
 
 static inline void free_alien_cache(struct alien_cache **ac_ptr)
diff --git a/mm/swap.c b/mm/swap.c
index c789d01c9ec3..6b2dc3897cd5 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -62,6 +62,7 @@ static void __page_cache_release(struct page *page)
 		del_page_from_lru_list(page, lruvec, page_off_lru(page));
 		spin_unlock_irqrestore(&zone->lru_lock, flags);
 	}
+	mem_cgroup_uncharge(page);
 }
 
 static void __put_single_page(struct page *page)
@@ -687,6 +688,40 @@ void add_page_to_unevictable_list(struct page *page)
 	spin_unlock_irq(&zone->lru_lock);
 }
 
+/**
+ * lru_cache_add_active_or_unevictable
+ * @page:  the page to be added to LRU
+ * @vma:   vma in which page is mapped for determining reclaimability
+ *
+ * Place @page on the active or unevictable LRU list, depending on its
+ * evictability.  Note that if the page is not evictable, it goes
+ * directly back onto it's zone's unevictable list, it does NOT use a
+ * per cpu pagevec.
+ */
+void lru_cache_add_active_or_unevictable(struct page *page,
+					 struct vm_area_struct *vma)
+{
+	VM_BUG_ON_PAGE(PageLRU(page), page);
+
+	if (likely((vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) != VM_LOCKED)) {
+		SetPageActive(page);
+		lru_cache_add(page);
+		return;
+	}
+
+	if (!TestSetPageMlocked(page)) {
+		/*
+		 * We use the irq-unsafe __mod_zone_page_stat because this
+		 * counter is not modified from interrupt context, and the pte
+		 * lock is held(spinlock), which implies preemption disabled.
+		 */
+		__mod_zone_page_state(page_zone(page), NR_MLOCK,
+				    hpage_nr_pages(page));
+		count_vm_event(UNEVICTABLE_PGMLOCKED);
+	}
+	add_page_to_unevictable_list(page);
+}
+
 /*
  * If the page can not be invalidated, it is moved to the
  * inactive list to speed up its reclaim.  It is moved to the
@@ -913,6 +948,7 @@ void release_pages(struct page **pages, int nr, bool cold)
 	if (zone)
 		spin_unlock_irqrestore(&zone->lru_lock, flags);
 
+	mem_cgroup_uncharge_list(&pages_to_free);
 	free_hot_cold_page_list(&pages_to_free, cold);
 }
 EXPORT_SYMBOL(release_pages);
diff --git a/mm/swap_state.c b/mm/swap_state.c
index 2972eee184a4..3e0ec83d000c 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -39,6 +39,7 @@ static struct backing_dev_info swap_backing_dev_info = {
 struct address_space swapper_spaces[MAX_SWAPFILES] = {
 	[0 ... MAX_SWAPFILES - 1] = {
 		.page_tree	= RADIX_TREE_INIT(GFP_ATOMIC|__GFP_NOWARN),
+		.i_mmap_writable = ATOMIC_INIT(0),
 		.a_ops		= &swap_aops,
 		.backing_dev_info = &swap_backing_dev_info,
 	}
@@ -176,7 +177,7 @@ int add_to_swap(struct page *page, struct list_head *list)
 
 	if (unlikely(PageTransHuge(page)))
 		if (unlikely(split_huge_page_to_list(page, list))) {
-			swapcache_free(entry, NULL);
+			swapcache_free(entry);
 			return 0;
 		}
 
@@ -202,7 +203,7 @@ int add_to_swap(struct page *page, struct list_head *list)
 		 * add_to_swap_cache() doesn't return -EEXIST, so we can safely
 		 * clear SWAP_HAS_CACHE flag.
 		 */
-		swapcache_free(entry, NULL);
+		swapcache_free(entry);
 		return 0;
 	}
 }
@@ -225,7 +226,7 @@ void delete_from_swap_cache(struct page *page)
 	__delete_from_swap_cache(page);
 	spin_unlock_irq(&address_space->tree_lock);
 
-	swapcache_free(entry, page);
+	swapcache_free(entry);
 	page_cache_release(page);
 }
 
@@ -386,7 +387,7 @@ struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
 		 * add_to_swap_cache() doesn't return -EEXIST, so we can safely
 		 * clear SWAP_HAS_CACHE flag.
 		 */
-		swapcache_free(entry, NULL);
+		swapcache_free(entry);
 	} while (err != -ENOMEM);
 
 	if (new_page)
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 4c524f7bd0bf..8798b2e0ac59 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -843,16 +843,13 @@ void swap_free(swp_entry_t entry)
 /*
  * Called after dropping swapcache to decrease refcnt to swap entries.
  */
-void swapcache_free(swp_entry_t entry, struct page *page)
+void swapcache_free(swp_entry_t entry)
 {
 	struct swap_info_struct *p;
-	unsigned char count;
 
 	p = swap_info_get(entry);
 	if (p) {
-		count = swap_entry_free(p, entry, SWAP_HAS_CACHE);
-		if (page)
-			mem_cgroup_uncharge_swapcache(page, entry, count != 0);
+		swap_entry_free(p, entry, SWAP_HAS_CACHE);
 		spin_unlock(&p->lock);
 	}
 }
@@ -1106,15 +1103,14 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
 	if (unlikely(!page))
 		return -ENOMEM;
 
-	if (mem_cgroup_try_charge_swapin(vma->vm_mm, page,
-					 GFP_KERNEL, &memcg)) {
+	if (mem_cgroup_try_charge(page, vma->vm_mm, GFP_KERNEL, &memcg)) {
 		ret = -ENOMEM;
 		goto out_nolock;
 	}
 
 	pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
 	if (unlikely(!maybe_same_pte(*pte, swp_entry_to_pte(entry)))) {
-		mem_cgroup_cancel_charge_swapin(memcg);
+		mem_cgroup_cancel_charge(page, memcg);
 		ret = 0;
 		goto out;
 	}
@@ -1124,11 +1120,14 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
 	get_page(page);
 	set_pte_at(vma->vm_mm, addr, pte,
 		   pte_mkold(mk_pte(page, vma->vm_page_prot)));
-	if (page == swapcache)
+	if (page == swapcache) {
 		page_add_anon_rmap(page, vma, addr);
-	else /* ksm created a completely new copy */
+		mem_cgroup_commit_charge(page, memcg, true);
+	} else { /* ksm created a completely new copy */
 		page_add_new_anon_rmap(page, vma, addr);
-	mem_cgroup_commit_charge_swapin(page, memcg);
+		mem_cgroup_commit_charge(page, memcg, false);
+		lru_cache_add_active_or_unevictable(page, vma);
+	}
 	swap_free(entry);
 	/*
 	 * Move the page to the active list so it is not
diff --git a/mm/truncate.c b/mm/truncate.c
index eda247307164..96d167372d89 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -281,7 +281,6 @@ void truncate_inode_pages_range(struct address_space *mapping,
 	while (index < end && pagevec_lookup_entries(&pvec, mapping, index,
 			min(end - index, (pgoff_t)PAGEVEC_SIZE),
 			indices)) {
-		mem_cgroup_uncharge_start();
 		for (i = 0; i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];
 
@@ -307,7 +306,6 @@ void truncate_inode_pages_range(struct address_space *mapping,
 		}
 		pagevec_remove_exceptionals(&pvec);
 		pagevec_release(&pvec);
-		mem_cgroup_uncharge_end();
 		cond_resched();
 		index++;
 	}
@@ -369,7 +367,6 @@ void truncate_inode_pages_range(struct address_space *mapping,
 			pagevec_release(&pvec);
 			break;
 		}
-		mem_cgroup_uncharge_start();
 		for (i = 0; i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];
 
@@ -394,7 +391,6 @@ void truncate_inode_pages_range(struct address_space *mapping,
 		}
 		pagevec_remove_exceptionals(&pvec);
 		pagevec_release(&pvec);
-		mem_cgroup_uncharge_end();
 		index++;
 	}
 	cleancache_invalidate_inode(mapping);
@@ -493,7 +489,6 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping,
 	while (index <= end && pagevec_lookup_entries(&pvec, mapping, index,
 			min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1,
 			indices)) {
-		mem_cgroup_uncharge_start();
 		for (i = 0; i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];
 
@@ -522,7 +517,6 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping,
 		}
 		pagevec_remove_exceptionals(&pvec);
 		pagevec_release(&pvec);
-		mem_cgroup_uncharge_end();
 		cond_resched();
 		index++;
 	}
@@ -553,7 +547,6 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page)
 	BUG_ON(page_has_private(page));
 	__delete_from_page_cache(page, NULL);
 	spin_unlock_irq(&mapping->tree_lock);
-	mem_cgroup_uncharge_cache_page(page);
 
 	if (mapping->a_ops->freepage)
 		mapping->a_ops->freepage(page);
@@ -602,7 +595,6 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
 	while (index <= end && pagevec_lookup_entries(&pvec, mapping, index,
 			min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1,
 			indices)) {
-		mem_cgroup_uncharge_start();
 		for (i = 0; i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];
 
@@ -655,7 +647,6 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
 		}
 		pagevec_remove_exceptionals(&pvec);
 		pagevec_release(&pvec);
-		mem_cgroup_uncharge_end();
 		cond_resched();
 		index++;
 	}
diff --git a/mm/util.c b/mm/util.c
index 7b6608df2ee8..093c973f1697 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -183,17 +183,14 @@ pid_t vm_is_stack(struct task_struct *task,
 
 	if (in_group) {
 		struct task_struct *t;
-		rcu_read_lock();
-		if (!pid_alive(task))
-			goto done;
 
-		t = task;
-		do {
+		rcu_read_lock();
+		for_each_thread(task, t) {
 			if (vm_is_stack_for_task(t, vma)) {
 				ret = t->pid;
 				goto done;
 			}
-		} while_each_thread(task, t);
+		}
 done:
 		rcu_read_unlock();
 	}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index d2f65c856350..2836b5373b2e 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -577,9 +577,10 @@ static int __remove_mapping(struct address_space *mapping, struct page *page,
 
 	if (PageSwapCache(page)) {
 		swp_entry_t swap = { .val = page_private(page) };
+		mem_cgroup_swapout(page, swap);
 		__delete_from_swap_cache(page);
 		spin_unlock_irq(&mapping->tree_lock);
-		swapcache_free(swap, page);
+		swapcache_free(swap);
 	} else {
 		void (*freepage)(struct page *);
 		void *shadow = NULL;
@@ -600,7 +601,6 @@ static int __remove_mapping(struct address_space *mapping, struct page *page,
 			shadow = workingset_eviction(mapping, page);
 		__delete_from_page_cache(page, shadow);
 		spin_unlock_irq(&mapping->tree_lock);
-		mem_cgroup_uncharge_cache_page(page);
 
 		if (freepage != NULL)
 			freepage(page);
@@ -822,7 +822,6 @@ static unsigned long shrink_page_list(struct list_head *page_list,
 
 	cond_resched();
 
-	mem_cgroup_uncharge_start();
 	while (!list_empty(page_list)) {
 		struct address_space *mapping;
 		struct page *page;
@@ -1133,11 +1132,12 @@ keep:
 		VM_BUG_ON_PAGE(PageLRU(page) || PageUnevictable(page), page);
 	}
 
+	mem_cgroup_uncharge_list(&free_pages);
 	free_hot_cold_page_list(&free_pages, true);
 
 	list_splice(&ret_pages, page_list);
 	count_vm_events(PGACTIVATE, pgactivate);
-	mem_cgroup_uncharge_end();
+
 	*ret_nr_dirty += nr_dirty;
 	*ret_nr_congested += nr_congested;
 	*ret_nr_unqueued_dirty += nr_unqueued_dirty;
@@ -1437,6 +1437,7 @@ putback_inactive_pages(struct lruvec *lruvec, struct list_head *page_list)
 
 			if (unlikely(PageCompound(page))) {
 				spin_unlock_irq(&zone->lru_lock);
+				mem_cgroup_uncharge(page);
 				(*get_compound_page_dtor(page))(page);
 				spin_lock_irq(&zone->lru_lock);
 			} else
@@ -1544,6 +1545,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
 
 	spin_unlock_irq(&zone->lru_lock);
 
+	mem_cgroup_uncharge_list(&page_list);
 	free_hot_cold_page_list(&page_list, true);
 
 	/*
@@ -1658,6 +1660,7 @@ static void move_active_pages_to_lru(struct lruvec *lruvec,
 
 			if (unlikely(PageCompound(page))) {
 				spin_unlock_irq(&zone->lru_lock);
+				mem_cgroup_uncharge(page);
 				(*get_compound_page_dtor(page))(page);
 				spin_lock_irq(&zone->lru_lock);
 			} else
@@ -1765,6 +1768,7 @@ static void shrink_active_list(unsigned long nr_to_scan,
 	__mod_zone_page_state(zone, NR_ISOLATED_ANON + file, -nr_taken);
 	spin_unlock_irq(&zone->lru_lock);
 
+	mem_cgroup_uncharge_list(&l_hold);
 	free_hot_cold_page_list(&l_hold, true);
 }
 
diff --git a/mm/zswap.c b/mm/zswap.c
index 032c21eeab2b..ea064c1a09ba 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -212,7 +212,7 @@ static int zswap_entry_cache_create(void)
 	return zswap_entry_cache == NULL;
 }
 
-static void zswap_entry_cache_destory(void)
+static void __init zswap_entry_cache_destroy(void)
 {
 	kmem_cache_destroy(zswap_entry_cache);
 }
@@ -507,7 +507,7 @@ static int zswap_get_swap_cache_page(swp_entry_t entry,
 		 * add_to_swap_cache() doesn't return -EEXIST, so we can safely
 		 * clear SWAP_HAS_CACHE flag.
 		 */
-		swapcache_free(entry, NULL);
+		swapcache_free(entry);
 	} while (err != -ENOMEM);
 
 	if (new_page)
@@ -941,7 +941,7 @@ static int __init init_zswap(void)
 pcpufail:
 	zswap_comp_exit();
 compfail:
-	zswap_entry_cache_destory();
+	zswap_entry_cache_destroy();
 cachefail:
 	zpool_destroy_pool(zswap_pool);
 error:
diff --git a/scripts/.gitignore b/scripts/.gitignore
index fb070fa1038f..5ecfe93f2028 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -4,7 +4,6 @@
 conmakehash
 kallsyms
 pnmtologo
-bin2c
 unifdef
 ihex2fw
 recordmcount
diff --git a/scripts/Makefile b/scripts/Makefile
index 890df5c6adfb..72902b5f2721 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -13,7 +13,6 @@ HOST_EXTRACFLAGS += -I$(srctree)/tools/include
 hostprogs-$(CONFIG_KALLSYMS)     += kallsyms
 hostprogs-$(CONFIG_LOGO)         += pnmtologo
 hostprogs-$(CONFIG_VT)           += conmakehash
-hostprogs-$(CONFIG_IKCONFIG)     += bin2c
 hostprogs-$(BUILD_C_RECORDMCOUNT) += recordmcount
 hostprogs-$(CONFIG_BUILDTIME_EXTABLE_SORT) += sortextable
 hostprogs-$(CONFIG_ASN1)	 += asn1_compiler
diff --git a/scripts/basic/.gitignore b/scripts/basic/.gitignore
index a776371a3502..9528ec9e5adc 100644
--- a/scripts/basic/.gitignore
+++ b/scripts/basic/.gitignore
@@ -1 +1,2 @@
 fixdep
+bin2c
diff --git a/scripts/basic/Makefile b/scripts/basic/Makefile
index 4fcef87bb875..ec10d9345bc2 100644
--- a/scripts/basic/Makefile
+++ b/scripts/basic/Makefile
@@ -9,6 +9,7 @@
 # fixdep: 	 Used to generate dependency information during build process
 
 hostprogs-y	:= fixdep
+hostprogs-$(CONFIG_BUILD_BIN2C)     += bin2c
 always		:= $(hostprogs-y)
 
 # fixdep is needed to compile other host programs
diff --git a/scripts/bin2c.c b/scripts/basic/bin2c.c
index 96dd2bcbb407..af187e695345 100644
--- a/scripts/bin2c.c
+++ b/scripts/basic/bin2c.c
@@ -11,7 +11,7 @@
 
 int main(int argc, char *argv[])
 {
-	int ch, total=0;
+	int ch, total = 0;
 
 	if (argc > 1)
 		printf("const char %s[] %s=\n",
@@ -19,10 +19,9 @@ int main(int argc, char *argv[])
 
 	do {
 		printf("\t\"");
-		while ((ch = getchar()) != EOF)
-		{
+		while ((ch = getchar()) != EOF) {
 			total++;
-			printf("\\x%02x",ch);
+			printf("\\x%02x", ch);
 			if (total % 16 == 0)
 				break;
 		}
diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index c05d586b1fee..899b4230320e 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -52,14 +52,12 @@ my (@stack, $re, $dre, $x, $xs, $funcre);
 		#8000008a:       20 1d           sub sp,4
 		#80000ca8:       fa cd 05 b0     sub sp,sp,1456
 		$re = qr/^.*sub.*sp.*,([0-9]{1,8})/o;
-	} elsif ($arch =~ /^i[3456]86$/) {
+	} elsif ($arch =~ /^x86(_64)?$/ || $arch =~ /^i[3456]86$/) {
 		#c0105234:       81 ec ac 05 00 00       sub    $0x5ac,%esp
-		$re = qr/^.*[as][du][db]    \$(0x$x{1,8}),\%esp$/o;
-		$dre = qr/^.*[as][du][db]    (%.*),\%esp$/o;
-	} elsif ($arch eq 'x86_64') {
-		#    2f60:	48 81 ec e8 05 00 00 	sub    $0x5e8,%rsp
-		$re = qr/^.*[as][du][db]    \$(0x$x{1,8}),\%rsp$/o;
-		$dre = qr/^.*[as][du][db]    (\%.*),\%rsp$/o;
+		# or
+		#    2f60:    48 81 ec e8 05 00 00       sub    $0x5e8,%rsp
+		$re = qr/^.*[as][du][db]    \$(0x$x{1,8}),\%(e|r)sp$/o;
+		$dre = qr/^.*[as][du][db]    (%.*),\%(e|r)sp$/o;
 	} elsif ($arch eq 'ia64') {
 		#e0000000044011fc:       01 0f fc 8c     adds r12=-384,r12
 		$re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
diff --git a/scripts/coccinelle/free/ifnullfree.cocci b/scripts/coccinelle/free/ifnullfree.cocci
new file mode 100644
index 000000000000..a42d70bf88b3
--- /dev/null
+++ b/scripts/coccinelle/free/ifnullfree.cocci
@@ -0,0 +1,53 @@
+/// NULL check before some freeing functions is not needed.
+///
+/// Based on checkpatch warning
+/// "kfree(NULL) is safe this check is probably not required"
+/// and kfreeaddr.cocci by Julia Lawall.
+///
+// Copyright: (C) 2014 Fabian Frederick.  GPLv2.
+// Comments: -
+// Options: --no-includes --include-headers
+
+virtual patch
+virtual org
+virtual report
+virtual context
+
+@r2 depends on patch@
+expression E;
+@@
+- if (E)
+(
+-	kfree(E);
++ kfree(E);
+|
+-	debugfs_remove(E);
++ debugfs_remove(E);
+|
+-	debugfs_remove_recursive(E);
++ debugfs_remove_recursive(E);
+|
+-	usb_free_urb(E);
++ usb_free_urb(E);
+)
+
+@r depends on context || report || org @
+expression E;
+position p;
+@@
+
+* if (E)
+*	\(kfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\|usb_free_urb\)(E);
+
+@script:python depends on org@
+p << r.p;
+@@
+
+cocci.print_main("NULL check before that freeing function is not needed", p)
+
+@script:python depends on report@
+p << r.p;
+@@
+
+msg = "WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values."
+coccilib.report.print_report(p[0], msg)
diff --git a/scripts/tags.sh b/scripts/tags.sh
index e6b011fe1d0d..cbfd269a6011 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -168,6 +168,7 @@ exuberant()
 	--extra=+f --c-kinds=+px                                \
 	--regex-asm='/^(ENTRY|_GLOBAL)\(([^)]*)\).*/\2/'        \
 	--regex-c='/^SYSCALL_DEFINE[[:digit:]]?\(([^,)]*).*/sys_\1/' \
+	--regex-c='/^COMPAT_SYSCALL_DEFINE[[:digit:]]?\(([^,)]*).*/compat_sys_\1/' \
 	--regex-c++='/^TRACE_EVENT\(([^,)]*).*/trace_\1/'		\
 	--regex-c++='/^DEFINE_EVENT\([^,)]*, *([^,)]*).*/trace_\1/'	\
 	--regex-c++='/PAGEFLAG\(([^,)]*).*/Page\1/'			\
@@ -231,6 +232,7 @@ emacs()
 	all_target_sources | xargs $1 -a                        \
 	--regex='/^\(ENTRY\|_GLOBAL\)(\([^)]*\)).*/\2/'         \
 	--regex='/^SYSCALL_DEFINE[0-9]?(\([^,)]*\).*/sys_\1/'   \
+	--regex='/^COMPAT_SYSCALL_DEFINE[0-9]?(\([^,)]*\).*/compat_sys_\1/' \
 	--regex='/^TRACE_EVENT(\([^,)]*\).*/trace_\1/'		\
 	--regex='/^DEFINE_EVENT([^,)]*, *\([^,)]*\).*/trace_\1/' \
 	--regex='/PAGEFLAG(\([^,)]*\).*/Page\1/'			\
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index d10f95ce2ea4..6fd2a4402069 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -2,6 +2,7 @@ TARGETS = breakpoints
 TARGETS += cpu-hotplug
 TARGETS += efivarfs
 TARGETS += kcmp
+TARGETS += memfd
 TARGETS += memory-hotplug
 TARGETS += mqueue
 TARGETS += net
diff --git a/tools/testing/selftests/memfd/.gitignore b/tools/testing/selftests/memfd/.gitignore
new file mode 100644
index 000000000000..afe87c40ac80
--- /dev/null
+++ b/tools/testing/selftests/memfd/.gitignore
@@ -0,0 +1,4 @@
+fuse_mnt
+fuse_test
+memfd_test
+memfd-test-file
diff --git a/tools/testing/selftests/memfd/Makefile b/tools/testing/selftests/memfd/Makefile
new file mode 100644
index 000000000000..6816c491c5ff
--- /dev/null
+++ b/tools/testing/selftests/memfd/Makefile
@@ -0,0 +1,41 @@
+uname_M := $(shell uname -m 2>/dev/null || echo not)
+ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/i386/)
+ifeq ($(ARCH),i386)
+	ARCH := X86
+endif
+ifeq ($(ARCH),x86_64)
+	ARCH := X86
+endif
+
+CFLAGS += -D_FILE_OFFSET_BITS=64
+CFLAGS += -I../../../../arch/x86/include/generated/uapi/
+CFLAGS += -I../../../../arch/x86/include/uapi/
+CFLAGS += -I../../../../include/uapi/
+CFLAGS += -I../../../../include/
+
+all:
+ifeq ($(ARCH),X86)
+	gcc $(CFLAGS) memfd_test.c -o memfd_test
+else
+	echo "Not an x86 target, can't build memfd selftest"
+endif
+
+run_tests: all
+ifeq ($(ARCH),X86)
+	gcc $(CFLAGS) memfd_test.c -o memfd_test
+endif
+	@./memfd_test || echo "memfd_test: [FAIL]"
+
+build_fuse:
+ifeq ($(ARCH),X86)
+	gcc $(CFLAGS) fuse_mnt.c `pkg-config fuse --cflags --libs` -o fuse_mnt
+	gcc $(CFLAGS) fuse_test.c -o fuse_test
+else
+	echo "Not an x86 target, can't build memfd selftest"
+endif
+
+run_fuse: build_fuse
+	@./run_fuse_test.sh || echo "fuse_test: [FAIL]"
+
+clean:
+	$(RM) memfd_test fuse_test
diff --git a/tools/testing/selftests/memfd/fuse_mnt.c b/tools/testing/selftests/memfd/fuse_mnt.c
new file mode 100644
index 000000000000..feacf1280fcd
--- /dev/null
+++ b/tools/testing/selftests/memfd/fuse_mnt.c
@@ -0,0 +1,110 @@
+/*
+ * memfd test file-system
+ * This file uses FUSE to create a dummy file-system with only one file /memfd.
+ * This file is read-only and takes 1s per read.
+ *
+ * This file-system is used by the memfd test-cases to force the kernel to pin
+ * pages during reads(). Due to the 1s delay of this file-system, this is a
+ * nice way to test race-conditions against get_user_pages() in the kernel.
+ *
+ * We use direct_io==1 to force the kernel to use direct-IO for this
+ * file-system.
+ */
+
+#define FUSE_USE_VERSION 26
+
+#include <fuse.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+static const char memfd_content[] = "memfd-example-content";
+static const char memfd_path[] = "/memfd";
+
+static int memfd_getattr(const char *path, struct stat *st)
+{
+	memset(st, 0, sizeof(*st));
+
+	if (!strcmp(path, "/")) {
+		st->st_mode = S_IFDIR | 0755;
+		st->st_nlink = 2;
+	} else if (!strcmp(path, memfd_path)) {
+		st->st_mode = S_IFREG | 0444;
+		st->st_nlink = 1;
+		st->st_size = strlen(memfd_content);
+	} else {
+		return -ENOENT;
+	}
+
+	return 0;
+}
+
+static int memfd_readdir(const char *path,
+			 void *buf,
+			 fuse_fill_dir_t filler,
+			 off_t offset,
+			 struct fuse_file_info *fi)
+{
+	if (strcmp(path, "/"))
+		return -ENOENT;
+
+	filler(buf, ".", NULL, 0);
+	filler(buf, "..", NULL, 0);
+	filler(buf, memfd_path + 1, NULL, 0);
+
+	return 0;
+}
+
+static int memfd_open(const char *path, struct fuse_file_info *fi)
+{
+	if (strcmp(path, memfd_path))
+		return -ENOENT;
+
+	if ((fi->flags & 3) != O_RDONLY)
+		return -EACCES;
+
+	/* force direct-IO */
+	fi->direct_io = 1;
+
+	return 0;
+}
+
+static int memfd_read(const char *path,
+		      char *buf,
+		      size_t size,
+		      off_t offset,
+		      struct fuse_file_info *fi)
+{
+	size_t len;
+
+	if (strcmp(path, memfd_path) != 0)
+		return -ENOENT;
+
+	sleep(1);
+
+	len = strlen(memfd_content);
+	if (offset < len) {
+		if (offset + size > len)
+			size = len - offset;
+
+		memcpy(buf, memfd_content + offset, size);
+	} else {
+		size = 0;
+	}
+
+	return size;
+}
+
+static struct fuse_operations memfd_ops = {
+	.getattr	= memfd_getattr,
+	.readdir	= memfd_readdir,
+	.open		= memfd_open,
+	.read		= memfd_read,
+};
+
+int main(int argc, char *argv[])
+{
+	return fuse_main(argc, argv, &memfd_ops, NULL);
+}
diff --git a/tools/testing/selftests/memfd/fuse_test.c b/tools/testing/selftests/memfd/fuse_test.c
new file mode 100644
index 000000000000..67908b18f035
--- /dev/null
+++ b/tools/testing/selftests/memfd/fuse_test.c
@@ -0,0 +1,311 @@
+/*
+ * memfd GUP test-case
+ * This tests memfd interactions with get_user_pages(). We require the
+ * fuse_mnt.c program to provide a fake direct-IO FUSE mount-point for us. This
+ * file-system delays _all_ reads by 1s and forces direct-IO. This means, any
+ * read() on files in that file-system will pin the receive-buffer pages for at
+ * least 1s via get_user_pages().
+ *
+ * We use this trick to race ADD_SEALS against a write on a memfd object. The
+ * ADD_SEALS must fail if the memfd pages are still pinned. Note that we use
+ * the read() syscall with our memory-mapped memfd object as receive buffer to
+ * force the kernel to write into our memfd object.
+ */
+
+#define _GNU_SOURCE
+#define __EXPORTED_HEADERS__
+
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <linux/falloc.h>
+#include <linux/fcntl.h>
+#include <linux/memfd.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#define MFD_DEF_SIZE 8192
+#define STACK_SIZE 65535
+
+static int sys_memfd_create(const char *name,
+			    unsigned int flags)
+{
+	return syscall(__NR_memfd_create, name, flags);
+}
+
+static int mfd_assert_new(const char *name, loff_t sz, unsigned int flags)
+{
+	int r, fd;
+
+	fd = sys_memfd_create(name, flags);
+	if (fd < 0) {
+		printf("memfd_create(\"%s\", %u) failed: %m\n",
+		       name, flags);
+		abort();
+	}
+
+	r = ftruncate(fd, sz);
+	if (r < 0) {
+		printf("ftruncate(%llu) failed: %m\n", (unsigned long long)sz);
+		abort();
+	}
+
+	return fd;
+}
+
+static __u64 mfd_assert_get_seals(int fd)
+{
+	long r;
+
+	r = fcntl(fd, F_GET_SEALS);
+	if (r < 0) {
+		printf("GET_SEALS(%d) failed: %m\n", fd);
+		abort();
+	}
+
+	return r;
+}
+
+static void mfd_assert_has_seals(int fd, __u64 seals)
+{
+	__u64 s;
+
+	s = mfd_assert_get_seals(fd);
+	if (s != seals) {
+		printf("%llu != %llu = GET_SEALS(%d)\n",
+		       (unsigned long long)seals, (unsigned long long)s, fd);
+		abort();
+	}
+}
+
+static void mfd_assert_add_seals(int fd, __u64 seals)
+{
+	long r;
+	__u64 s;
+
+	s = mfd_assert_get_seals(fd);
+	r = fcntl(fd, F_ADD_SEALS, seals);
+	if (r < 0) {
+		printf("ADD_SEALS(%d, %llu -> %llu) failed: %m\n",
+		       fd, (unsigned long long)s, (unsigned long long)seals);
+		abort();
+	}
+}
+
+static int mfd_busy_add_seals(int fd, __u64 seals)
+{
+	long r;
+	__u64 s;
+
+	r = fcntl(fd, F_GET_SEALS);
+	if (r < 0)
+		s = 0;
+	else
+		s = r;
+
+	r = fcntl(fd, F_ADD_SEALS, seals);
+	if (r < 0 && errno != EBUSY) {
+		printf("ADD_SEALS(%d, %llu -> %llu) didn't fail as expected with EBUSY: %m\n",
+		       fd, (unsigned long long)s, (unsigned long long)seals);
+		abort();
+	}
+
+	return r;
+}
+
+static void *mfd_assert_mmap_shared(int fd)
+{
+	void *p;
+
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_READ | PROT_WRITE,
+		 MAP_SHARED,
+		 fd,
+		 0);
+	if (p == MAP_FAILED) {
+		printf("mmap() failed: %m\n");
+		abort();
+	}
+
+	return p;
+}
+
+static void *mfd_assert_mmap_private(int fd)
+{
+	void *p;
+
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_READ | PROT_WRITE,
+		 MAP_PRIVATE,
+		 fd,
+		 0);
+	if (p == MAP_FAILED) {
+		printf("mmap() failed: %m\n");
+		abort();
+	}
+
+	return p;
+}
+
+static int global_mfd = -1;
+static void *global_p = NULL;
+
+static int sealing_thread_fn(void *arg)
+{
+	int sig, r;
+
+	/*
+	 * This thread first waits 200ms so any pending operation in the parent
+	 * is correctly started. After that, it tries to seal @global_mfd as
+	 * SEAL_WRITE. This _must_ fail as the parent thread has a read() into
+	 * that memory mapped object still ongoing.
+	 * We then wait one more second and try sealing again. This time it
+	 * must succeed as there shouldn't be anyone else pinning the pages.
+	 */
+
+	/* wait 200ms for FUSE-request to be active */
+	usleep(200000);
+
+	/* unmount mapping before sealing to avoid i_mmap_writable failures */
+	munmap(global_p, MFD_DEF_SIZE);
+
+	/* Try sealing the global file; expect EBUSY or success. Current
+	 * kernels will never succeed, but in the future, kernels might
+	 * implement page-replacements or other fancy ways to avoid racing
+	 * writes. */
+	r = mfd_busy_add_seals(global_mfd, F_SEAL_WRITE);
+	if (r >= 0) {
+		printf("HURRAY! This kernel fixed GUP races!\n");
+	} else {
+		/* wait 1s more so the FUSE-request is done */
+		sleep(1);
+
+		/* try sealing the global file again */
+		mfd_assert_add_seals(global_mfd, F_SEAL_WRITE);
+	}
+
+	return 0;
+}
+
+static pid_t spawn_sealing_thread(void)
+{
+	uint8_t *stack;
+	pid_t pid;
+
+	stack = malloc(STACK_SIZE);
+	if (!stack) {
+		printf("malloc(STACK_SIZE) failed: %m\n");
+		abort();
+	}
+
+	pid = clone(sealing_thread_fn,
+		    stack + STACK_SIZE,
+		    SIGCHLD | CLONE_FILES | CLONE_FS | CLONE_VM,
+		    NULL);
+	if (pid < 0) {
+		printf("clone() failed: %m\n");
+		abort();
+	}
+
+	return pid;
+}
+
+static void join_sealing_thread(pid_t pid)
+{
+	waitpid(pid, NULL, 0);
+}
+
+int main(int argc, char **argv)
+{
+	static const char zero[MFD_DEF_SIZE];
+	int fd, mfd, r;
+	void *p;
+	int was_sealed;
+	pid_t pid;
+
+	if (argc < 2) {
+		printf("error: please pass path to file in fuse_mnt mount-point\n");
+		abort();
+	}
+
+	/* open FUSE memfd file for GUP testing */
+	printf("opening: %s\n", argv[1]);
+	fd = open(argv[1], O_RDONLY | O_CLOEXEC);
+	if (fd < 0) {
+		printf("cannot open(\"%s\"): %m\n", argv[1]);
+		abort();
+	}
+
+	/* create new memfd-object */
+	mfd = mfd_assert_new("kern_memfd_fuse",
+			     MFD_DEF_SIZE,
+			     MFD_CLOEXEC | MFD_ALLOW_SEALING);
+
+	/* mmap memfd-object for writing */
+	p = mfd_assert_mmap_shared(mfd);
+
+	/* pass mfd+mapping to a separate sealing-thread which tries to seal
+	 * the memfd objects with SEAL_WRITE while we write into it */
+	global_mfd = mfd;
+	global_p = p;
+	pid = spawn_sealing_thread();
+
+	/* Use read() on the FUSE file to read into our memory-mapped memfd
+	 * object. This races the other thread which tries to seal the
+	 * memfd-object.
+	 * If @fd is on the memfd-fake-FUSE-FS, the read() is delayed by 1s.
+	 * This guarantees that the receive-buffer is pinned for 1s until the
+	 * data is written into it. The racing ADD_SEALS should thus fail as
+	 * the pages are still pinned. */
+	r = read(fd, p, MFD_DEF_SIZE);
+	if (r < 0) {
+		printf("read() failed: %m\n");
+		abort();
+	} else if (!r) {
+		printf("unexpected EOF on read()\n");
+		abort();
+	}
+
+	was_sealed = mfd_assert_get_seals(mfd) & F_SEAL_WRITE;
+
+	/* Wait for sealing-thread to finish and verify that it
+	 * successfully sealed the file after the second try. */
+	join_sealing_thread(pid);
+	mfd_assert_has_seals(mfd, F_SEAL_WRITE);
+
+	/* *IF* the memfd-object was sealed at the time our read() returned,
+	 * then the kernel did a page-replacement or canceled the read() (or
+	 * whatever magic it did..). In that case, the memfd object is still
+	 * all zero.
+	 * In case the memfd-object was *not* sealed, the read() was successfull
+	 * and the memfd object must *not* be all zero.
+	 * Note that in real scenarios, there might be a mixture of both, but
+	 * in this test-cases, we have explicit 200ms delays which should be
+	 * enough to avoid any in-flight writes. */
+
+	p = mfd_assert_mmap_private(mfd);
+	if (was_sealed && memcmp(p, zero, MFD_DEF_SIZE)) {
+		printf("memfd sealed during read() but data not discarded\n");
+		abort();
+	} else if (!was_sealed && !memcmp(p, zero, MFD_DEF_SIZE)) {
+		printf("memfd sealed after read() but data discarded\n");
+		abort();
+	}
+
+	close(mfd);
+	close(fd);
+
+	printf("fuse: DONE\n");
+
+	return 0;
+}
diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
new file mode 100644
index 000000000000..3634c909b1b0
--- /dev/null
+++ b/tools/testing/selftests/memfd/memfd_test.c
@@ -0,0 +1,913 @@
+#define _GNU_SOURCE
+#define __EXPORTED_HEADERS__
+
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <linux/falloc.h>
+#include <linux/fcntl.h>
+#include <linux/memfd.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#define MFD_DEF_SIZE 8192
+#define STACK_SIZE 65535
+
+static int sys_memfd_create(const char *name,
+			    unsigned int flags)
+{
+	return syscall(__NR_memfd_create, name, flags);
+}
+
+static int mfd_assert_new(const char *name, loff_t sz, unsigned int flags)
+{
+	int r, fd;
+
+	fd = sys_memfd_create(name, flags);
+	if (fd < 0) {
+		printf("memfd_create(\"%s\", %u) failed: %m\n",
+		       name, flags);
+		abort();
+	}
+
+	r = ftruncate(fd, sz);
+	if (r < 0) {
+		printf("ftruncate(%llu) failed: %m\n", (unsigned long long)sz);
+		abort();
+	}
+
+	return fd;
+}
+
+static void mfd_fail_new(const char *name, unsigned int flags)
+{
+	int r;
+
+	r = sys_memfd_create(name, flags);
+	if (r >= 0) {
+		printf("memfd_create(\"%s\", %u) succeeded, but failure expected\n",
+		       name, flags);
+		close(r);
+		abort();
+	}
+}
+
+static __u64 mfd_assert_get_seals(int fd)
+{
+	long r;
+
+	r = fcntl(fd, F_GET_SEALS);
+	if (r < 0) {
+		printf("GET_SEALS(%d) failed: %m\n", fd);
+		abort();
+	}
+
+	return r;
+}
+
+static void mfd_assert_has_seals(int fd, __u64 seals)
+{
+	__u64 s;
+
+	s = mfd_assert_get_seals(fd);
+	if (s != seals) {
+		printf("%llu != %llu = GET_SEALS(%d)\n",
+		       (unsigned long long)seals, (unsigned long long)s, fd);
+		abort();
+	}
+}
+
+static void mfd_assert_add_seals(int fd, __u64 seals)
+{
+	long r;
+	__u64 s;
+
+	s = mfd_assert_get_seals(fd);
+	r = fcntl(fd, F_ADD_SEALS, seals);
+	if (r < 0) {
+		printf("ADD_SEALS(%d, %llu -> %llu) failed: %m\n",
+		       fd, (unsigned long long)s, (unsigned long long)seals);
+		abort();
+	}
+}
+
+static void mfd_fail_add_seals(int fd, __u64 seals)
+{
+	long r;
+	__u64 s;
+
+	r = fcntl(fd, F_GET_SEALS);
+	if (r < 0)
+		s = 0;
+	else
+		s = r;
+
+	r = fcntl(fd, F_ADD_SEALS, seals);
+	if (r >= 0) {
+		printf("ADD_SEALS(%d, %llu -> %llu) didn't fail as expected\n",
+		       fd, (unsigned long long)s, (unsigned long long)seals);
+		abort();
+	}
+}
+
+static void mfd_assert_size(int fd, size_t size)
+{
+	struct stat st;
+	int r;
+
+	r = fstat(fd, &st);
+	if (r < 0) {
+		printf("fstat(%d) failed: %m\n", fd);
+		abort();
+	} else if (st.st_size != size) {
+		printf("wrong file size %lld, but expected %lld\n",
+		       (long long)st.st_size, (long long)size);
+		abort();
+	}
+}
+
+static int mfd_assert_dup(int fd)
+{
+	int r;
+
+	r = dup(fd);
+	if (r < 0) {
+		printf("dup(%d) failed: %m\n", fd);
+		abort();
+	}
+
+	return r;
+}
+
+static void *mfd_assert_mmap_shared(int fd)
+{
+	void *p;
+
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_READ | PROT_WRITE,
+		 MAP_SHARED,
+		 fd,
+		 0);
+	if (p == MAP_FAILED) {
+		printf("mmap() failed: %m\n");
+		abort();
+	}
+
+	return p;
+}
+
+static void *mfd_assert_mmap_private(int fd)
+{
+	void *p;
+
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_READ,
+		 MAP_PRIVATE,
+		 fd,
+		 0);
+	if (p == MAP_FAILED) {
+		printf("mmap() failed: %m\n");
+		abort();
+	}
+
+	return p;
+}
+
+static int mfd_assert_open(int fd, int flags, mode_t mode)
+{
+	char buf[512];
+	int r;
+
+	sprintf(buf, "/proc/self/fd/%d", fd);
+	r = open(buf, flags, mode);
+	if (r < 0) {
+		printf("open(%s) failed: %m\n", buf);
+		abort();
+	}
+
+	return r;
+}
+
+static void mfd_fail_open(int fd, int flags, mode_t mode)
+{
+	char buf[512];
+	int r;
+
+	sprintf(buf, "/proc/self/fd/%d", fd);
+	r = open(buf, flags, mode);
+	if (r >= 0) {
+		printf("open(%s) didn't fail as expected\n");
+		abort();
+	}
+}
+
+static void mfd_assert_read(int fd)
+{
+	char buf[16];
+	void *p;
+	ssize_t l;
+
+	l = read(fd, buf, sizeof(buf));
+	if (l != sizeof(buf)) {
+		printf("read() failed: %m\n");
+		abort();
+	}
+
+	/* verify PROT_READ *is* allowed */
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_READ,
+		 MAP_PRIVATE,
+		 fd,
+		 0);
+	if (p == MAP_FAILED) {
+		printf("mmap() failed: %m\n");
+		abort();
+	}
+	munmap(p, MFD_DEF_SIZE);
+
+	/* verify MAP_PRIVATE is *always* allowed (even writable) */
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_READ | PROT_WRITE,
+		 MAP_PRIVATE,
+		 fd,
+		 0);
+	if (p == MAP_FAILED) {
+		printf("mmap() failed: %m\n");
+		abort();
+	}
+	munmap(p, MFD_DEF_SIZE);
+}
+
+static void mfd_assert_write(int fd)
+{
+	ssize_t l;
+	void *p;
+	int r;
+
+	/* verify write() succeeds */
+	l = write(fd, "\0\0\0\0", 4);
+	if (l != 4) {
+		printf("write() failed: %m\n");
+		abort();
+	}
+
+	/* verify PROT_READ | PROT_WRITE is allowed */
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_READ | PROT_WRITE,
+		 MAP_SHARED,
+		 fd,
+		 0);
+	if (p == MAP_FAILED) {
+		printf("mmap() failed: %m\n");
+		abort();
+	}
+	*(char *)p = 0;
+	munmap(p, MFD_DEF_SIZE);
+
+	/* verify PROT_WRITE is allowed */
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_WRITE,
+		 MAP_SHARED,
+		 fd,
+		 0);
+	if (p == MAP_FAILED) {
+		printf("mmap() failed: %m\n");
+		abort();
+	}
+	*(char *)p = 0;
+	munmap(p, MFD_DEF_SIZE);
+
+	/* verify PROT_READ with MAP_SHARED is allowed and a following
+	 * mprotect(PROT_WRITE) allows writing */
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_READ,
+		 MAP_SHARED,
+		 fd,
+		 0);
+	if (p == MAP_FAILED) {
+		printf("mmap() failed: %m\n");
+		abort();
+	}
+
+	r = mprotect(p, MFD_DEF_SIZE, PROT_READ | PROT_WRITE);
+	if (r < 0) {
+		printf("mprotect() failed: %m\n");
+		abort();
+	}
+
+	*(char *)p = 0;
+	munmap(p, MFD_DEF_SIZE);
+
+	/* verify PUNCH_HOLE works */
+	r = fallocate(fd,
+		      FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
+		      0,
+		      MFD_DEF_SIZE);
+	if (r < 0) {
+		printf("fallocate(PUNCH_HOLE) failed: %m\n");
+		abort();
+	}
+}
+
+static void mfd_fail_write(int fd)
+{
+	ssize_t l;
+	void *p;
+	int r;
+
+	/* verify write() fails */
+	l = write(fd, "data", 4);
+	if (l != -EPERM) {
+		printf("expected EPERM on write(), but got %d: %m\n", (int)l);
+		abort();
+	}
+
+	/* verify PROT_READ | PROT_WRITE is not allowed */
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_READ | PROT_WRITE,
+		 MAP_SHARED,
+		 fd,
+		 0);
+	if (p != MAP_FAILED) {
+		printf("mmap() didn't fail as expected\n");
+		abort();
+	}
+
+	/* verify PROT_WRITE is not allowed */
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_WRITE,
+		 MAP_SHARED,
+		 fd,
+		 0);
+	if (p != MAP_FAILED) {
+		printf("mmap() didn't fail as expected\n");
+		abort();
+	}
+
+	/* Verify PROT_READ with MAP_SHARED with a following mprotect is not
+	 * allowed. Note that for r/w the kernel already prevents the mmap. */
+	p = mmap(NULL,
+		 MFD_DEF_SIZE,
+		 PROT_READ,
+		 MAP_SHARED,
+		 fd,
+		 0);
+	if (p != MAP_FAILED) {
+		r = mprotect(p, MFD_DEF_SIZE, PROT_READ | PROT_WRITE);
+		if (r >= 0) {
+			printf("mmap()+mprotect() didn't fail as expected\n");
+			abort();
+		}
+	}
+
+	/* verify PUNCH_HOLE fails */
+	r = fallocate(fd,
+		      FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
+		      0,
+		      MFD_DEF_SIZE);
+	if (r >= 0) {
+		printf("fallocate(PUNCH_HOLE) didn't fail as expected\n");
+		abort();
+	}
+}
+
+static void mfd_assert_shrink(int fd)
+{
+	int r, fd2;
+
+	r = ftruncate(fd, MFD_DEF_SIZE / 2);
+	if (r < 0) {
+		printf("ftruncate(SHRINK) failed: %m\n");
+		abort();
+	}
+
+	mfd_assert_size(fd, MFD_DEF_SIZE / 2);
+
+	fd2 = mfd_assert_open(fd,
+			      O_RDWR | O_CREAT | O_TRUNC,
+			      S_IRUSR | S_IWUSR);
+	close(fd2);
+
+	mfd_assert_size(fd, 0);
+}
+
+static void mfd_fail_shrink(int fd)
+{
+	int r;
+
+	r = ftruncate(fd, MFD_DEF_SIZE / 2);
+	if (r >= 0) {
+		printf("ftruncate(SHRINK) didn't fail as expected\n");
+		abort();
+	}
+
+	mfd_fail_open(fd,
+		      O_RDWR | O_CREAT | O_TRUNC,
+		      S_IRUSR | S_IWUSR);
+}
+
+static void mfd_assert_grow(int fd)
+{
+	int r;
+
+	r = ftruncate(fd, MFD_DEF_SIZE * 2);
+	if (r < 0) {
+		printf("ftruncate(GROW) failed: %m\n");
+		abort();
+	}
+
+	mfd_assert_size(fd, MFD_DEF_SIZE * 2);
+
+	r = fallocate(fd,
+		      0,
+		      0,
+		      MFD_DEF_SIZE * 4);
+	if (r < 0) {
+		printf("fallocate(ALLOC) failed: %m\n");
+		abort();
+	}
+
+	mfd_assert_size(fd, MFD_DEF_SIZE * 4);
+}
+
+static void mfd_fail_grow(int fd)
+{
+	int r;
+
+	r = ftruncate(fd, MFD_DEF_SIZE * 2);
+	if (r >= 0) {
+		printf("ftruncate(GROW) didn't fail as expected\n");
+		abort();
+	}
+
+	r = fallocate(fd,
+		      0,
+		      0,
+		      MFD_DEF_SIZE * 4);
+	if (r >= 0) {
+		printf("fallocate(ALLOC) didn't fail as expected\n");
+		abort();
+	}
+}
+
+static void mfd_assert_grow_write(int fd)
+{
+	static char buf[MFD_DEF_SIZE * 8];
+	ssize_t l;
+
+	l = pwrite(fd, buf, sizeof(buf), 0);
+	if (l != sizeof(buf)) {
+		printf("pwrite() failed: %m\n");
+		abort();
+	}
+
+	mfd_assert_size(fd, MFD_DEF_SIZE * 8);
+}
+
+static void mfd_fail_grow_write(int fd)
+{
+	static char buf[MFD_DEF_SIZE * 8];
+	ssize_t l;
+
+	l = pwrite(fd, buf, sizeof(buf), 0);
+	if (l == sizeof(buf)) {
+		printf("pwrite() didn't fail as expected\n");
+		abort();
+	}
+}
+
+static int idle_thread_fn(void *arg)
+{
+	sigset_t set;
+	int sig;
+
+	/* dummy waiter; SIGTERM terminates us anyway */
+	sigemptyset(&set);
+	sigaddset(&set, SIGTERM);
+	sigwait(&set, &sig);
+
+	return 0;
+}
+
+static pid_t spawn_idle_thread(unsigned int flags)
+{
+	uint8_t *stack;
+	pid_t pid;
+
+	stack = malloc(STACK_SIZE);
+	if (!stack) {
+		printf("malloc(STACK_SIZE) failed: %m\n");
+		abort();
+	}
+
+	pid = clone(idle_thread_fn,
+		    stack + STACK_SIZE,
+		    SIGCHLD | flags,
+		    NULL);
+	if (pid < 0) {
+		printf("clone() failed: %m\n");
+		abort();
+	}
+
+	return pid;
+}
+
+static void join_idle_thread(pid_t pid)
+{
+	kill(pid, SIGTERM);
+	waitpid(pid, NULL, 0);
+}
+
+/*
+ * Test memfd_create() syscall
+ * Verify syscall-argument validation, including name checks, flag validation
+ * and more.
+ */
+static void test_create(void)
+{
+	char buf[2048];
+	int fd;
+
+	/* test NULL name */
+	mfd_fail_new(NULL, 0);
+
+	/* test over-long name (not zero-terminated) */
+	memset(buf, 0xff, sizeof(buf));
+	mfd_fail_new(buf, 0);
+
+	/* test over-long zero-terminated name */
+	memset(buf, 0xff, sizeof(buf));
+	buf[sizeof(buf) - 1] = 0;
+	mfd_fail_new(buf, 0);
+
+	/* verify "" is a valid name */
+	fd = mfd_assert_new("", 0, 0);
+	close(fd);
+
+	/* verify invalid O_* open flags */
+	mfd_fail_new("", 0x0100);
+	mfd_fail_new("", ~MFD_CLOEXEC);
+	mfd_fail_new("", ~MFD_ALLOW_SEALING);
+	mfd_fail_new("", ~0);
+	mfd_fail_new("", 0x80000000U);
+
+	/* verify MFD_CLOEXEC is allowed */
+	fd = mfd_assert_new("", 0, MFD_CLOEXEC);
+	close(fd);
+
+	/* verify MFD_ALLOW_SEALING is allowed */
+	fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING);
+	close(fd);
+
+	/* verify MFD_ALLOW_SEALING | MFD_CLOEXEC is allowed */
+	fd = mfd_assert_new("", 0, MFD_ALLOW_SEALING | MFD_CLOEXEC);
+	close(fd);
+}
+
+/*
+ * Test basic sealing
+ * A very basic sealing test to see whether setting/retrieving seals works.
+ */
+static void test_basic(void)
+{
+	int fd;
+
+	fd = mfd_assert_new("kern_memfd_basic",
+			    MFD_DEF_SIZE,
+			    MFD_CLOEXEC | MFD_ALLOW_SEALING);
+
+	/* add basic seals */
+	mfd_assert_has_seals(fd, 0);
+	mfd_assert_add_seals(fd, F_SEAL_SHRINK |
+				 F_SEAL_WRITE);
+	mfd_assert_has_seals(fd, F_SEAL_SHRINK |
+				 F_SEAL_WRITE);
+
+	/* add them again */
+	mfd_assert_add_seals(fd, F_SEAL_SHRINK |
+				 F_SEAL_WRITE);
+	mfd_assert_has_seals(fd, F_SEAL_SHRINK |
+				 F_SEAL_WRITE);
+
+	/* add more seals and seal against sealing */
+	mfd_assert_add_seals(fd, F_SEAL_GROW | F_SEAL_SEAL);
+	mfd_assert_has_seals(fd, F_SEAL_SHRINK |
+				 F_SEAL_GROW |
+				 F_SEAL_WRITE |
+				 F_SEAL_SEAL);
+
+	/* verify that sealing no longer works */
+	mfd_fail_add_seals(fd, F_SEAL_GROW);
+	mfd_fail_add_seals(fd, 0);
+
+	close(fd);
+
+	/* verify sealing does not work without MFD_ALLOW_SEALING */
+	fd = mfd_assert_new("kern_memfd_basic",
+			    MFD_DEF_SIZE,
+			    MFD_CLOEXEC);
+	mfd_assert_has_seals(fd, F_SEAL_SEAL);
+	mfd_fail_add_seals(fd, F_SEAL_SHRINK |
+			       F_SEAL_GROW |
+			       F_SEAL_WRITE);
+	mfd_assert_has_seals(fd, F_SEAL_SEAL);
+	close(fd);
+}
+
+/*
+ * Test SEAL_WRITE
+ * Test whether SEAL_WRITE actually prevents modifications.
+ */
+static void test_seal_write(void)
+{
+	int fd;
+
+	fd = mfd_assert_new("kern_memfd_seal_write",
+			    MFD_DEF_SIZE,
+			    MFD_CLOEXEC | MFD_ALLOW_SEALING);
+	mfd_assert_has_seals(fd, 0);
+	mfd_assert_add_seals(fd, F_SEAL_WRITE);
+	mfd_assert_has_seals(fd, F_SEAL_WRITE);
+
+	mfd_assert_read(fd);
+	mfd_fail_write(fd);
+	mfd_assert_shrink(fd);
+	mfd_assert_grow(fd);
+	mfd_fail_grow_write(fd);
+
+	close(fd);
+}
+
+/*
+ * Test SEAL_SHRINK
+ * Test whether SEAL_SHRINK actually prevents shrinking
+ */
+static void test_seal_shrink(void)
+{
+	int fd;
+
+	fd = mfd_assert_new("kern_memfd_seal_shrink",
+			    MFD_DEF_SIZE,
+			    MFD_CLOEXEC | MFD_ALLOW_SEALING);
+	mfd_assert_has_seals(fd, 0);
+	mfd_assert_add_seals(fd, F_SEAL_SHRINK);
+	mfd_assert_has_seals(fd, F_SEAL_SHRINK);
+
+	mfd_assert_read(fd);
+	mfd_assert_write(fd);
+	mfd_fail_shrink(fd);
+	mfd_assert_grow(fd);
+	mfd_assert_grow_write(fd);
+
+	close(fd);
+}
+
+/*
+ * Test SEAL_GROW
+ * Test whether SEAL_GROW actually prevents growing
+ */
+static void test_seal_grow(void)
+{
+	int fd;
+
+	fd = mfd_assert_new("kern_memfd_seal_grow",
+			    MFD_DEF_SIZE,
+			    MFD_CLOEXEC | MFD_ALLOW_SEALING);
+	mfd_assert_has_seals(fd, 0);
+	mfd_assert_add_seals(fd, F_SEAL_GROW);
+	mfd_assert_has_seals(fd, F_SEAL_GROW);
+
+	mfd_assert_read(fd);
+	mfd_assert_write(fd);
+	mfd_assert_shrink(fd);
+	mfd_fail_grow(fd);
+	mfd_fail_grow_write(fd);
+
+	close(fd);
+}
+
+/*
+ * Test SEAL_SHRINK | SEAL_GROW
+ * Test whether SEAL_SHRINK | SEAL_GROW actually prevents resizing
+ */
+static void test_seal_resize(void)
+{
+	int fd;
+
+	fd = mfd_assert_new("kern_memfd_seal_resize",
+			    MFD_DEF_SIZE,
+			    MFD_CLOEXEC | MFD_ALLOW_SEALING);
+	mfd_assert_has_seals(fd, 0);
+	mfd_assert_add_seals(fd, F_SEAL_SHRINK | F_SEAL_GROW);
+	mfd_assert_has_seals(fd, F_SEAL_SHRINK | F_SEAL_GROW);
+
+	mfd_assert_read(fd);
+	mfd_assert_write(fd);
+	mfd_fail_shrink(fd);
+	mfd_fail_grow(fd);
+	mfd_fail_grow_write(fd);
+
+	close(fd);
+}
+
+/*
+ * Test sharing via dup()
+ * Test that seals are shared between dupped FDs and they're all equal.
+ */
+static void test_share_dup(void)
+{
+	int fd, fd2;
+
+	fd = mfd_assert_new("kern_memfd_share_dup",
+			    MFD_DEF_SIZE,
+			    MFD_CLOEXEC | MFD_ALLOW_SEALING);
+	mfd_assert_has_seals(fd, 0);
+
+	fd2 = mfd_assert_dup(fd);
+	mfd_assert_has_seals(fd2, 0);
+
+	mfd_assert_add_seals(fd, F_SEAL_WRITE);
+	mfd_assert_has_seals(fd, F_SEAL_WRITE);
+	mfd_assert_has_seals(fd2, F_SEAL_WRITE);
+
+	mfd_assert_add_seals(fd2, F_SEAL_SHRINK);
+	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK);
+	mfd_assert_has_seals(fd2, F_SEAL_WRITE | F_SEAL_SHRINK);
+
+	mfd_assert_add_seals(fd, F_SEAL_SEAL);
+	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK | F_SEAL_SEAL);
+	mfd_assert_has_seals(fd2, F_SEAL_WRITE | F_SEAL_SHRINK | F_SEAL_SEAL);
+
+	mfd_fail_add_seals(fd, F_SEAL_GROW);
+	mfd_fail_add_seals(fd2, F_SEAL_GROW);
+	mfd_fail_add_seals(fd, F_SEAL_SEAL);
+	mfd_fail_add_seals(fd2, F_SEAL_SEAL);
+
+	close(fd2);
+
+	mfd_fail_add_seals(fd, F_SEAL_GROW);
+	close(fd);
+}
+
+/*
+ * Test sealing with active mmap()s
+ * Modifying seals is only allowed if no other mmap() refs exist.
+ */
+static void test_share_mmap(void)
+{
+	int fd;
+	void *p;
+
+	fd = mfd_assert_new("kern_memfd_share_mmap",
+			    MFD_DEF_SIZE,
+			    MFD_CLOEXEC | MFD_ALLOW_SEALING);
+	mfd_assert_has_seals(fd, 0);
+
+	/* shared/writable ref prevents sealing WRITE, but allows others */
+	p = mfd_assert_mmap_shared(fd);
+	mfd_fail_add_seals(fd, F_SEAL_WRITE);
+	mfd_assert_has_seals(fd, 0);
+	mfd_assert_add_seals(fd, F_SEAL_SHRINK);
+	mfd_assert_has_seals(fd, F_SEAL_SHRINK);
+	munmap(p, MFD_DEF_SIZE);
+
+	/* readable ref allows sealing */
+	p = mfd_assert_mmap_private(fd);
+	mfd_assert_add_seals(fd, F_SEAL_WRITE);
+	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK);
+	munmap(p, MFD_DEF_SIZE);
+
+	close(fd);
+}
+
+/*
+ * Test sealing with open(/proc/self/fd/%d)
+ * Via /proc we can get access to a separate file-context for the same memfd.
+ * This is *not* like dup(), but like a real separate open(). Make sure the
+ * semantics are as expected and we correctly check for RDONLY / WRONLY / RDWR.
+ */
+static void test_share_open(void)
+{
+	int fd, fd2;
+
+	fd = mfd_assert_new("kern_memfd_share_open",
+			    MFD_DEF_SIZE,
+			    MFD_CLOEXEC | MFD_ALLOW_SEALING);
+	mfd_assert_has_seals(fd, 0);
+
+	fd2 = mfd_assert_open(fd, O_RDWR, 0);
+	mfd_assert_add_seals(fd, F_SEAL_WRITE);
+	mfd_assert_has_seals(fd, F_SEAL_WRITE);
+	mfd_assert_has_seals(fd2, F_SEAL_WRITE);
+
+	mfd_assert_add_seals(fd2, F_SEAL_SHRINK);
+	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK);
+	mfd_assert_has_seals(fd2, F_SEAL_WRITE | F_SEAL_SHRINK);
+
+	close(fd);
+	fd = mfd_assert_open(fd2, O_RDONLY, 0);
+
+	mfd_fail_add_seals(fd, F_SEAL_SEAL);
+	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK);
+	mfd_assert_has_seals(fd2, F_SEAL_WRITE | F_SEAL_SHRINK);
+
+	close(fd2);
+	fd2 = mfd_assert_open(fd, O_RDWR, 0);
+
+	mfd_assert_add_seals(fd2, F_SEAL_SEAL);
+	mfd_assert_has_seals(fd, F_SEAL_WRITE | F_SEAL_SHRINK | F_SEAL_SEAL);
+	mfd_assert_has_seals(fd2, F_SEAL_WRITE | F_SEAL_SHRINK | F_SEAL_SEAL);
+
+	close(fd2);
+	close(fd);
+}
+
+/*
+ * Test sharing via fork()
+ * Test whether seal-modifications work as expected with forked childs.
+ */
+static void test_share_fork(void)
+{
+	int fd;
+	pid_t pid;
+
+	fd = mfd_assert_new("kern_memfd_share_fork",
+			    MFD_DEF_SIZE,
+			    MFD_CLOEXEC | MFD_ALLOW_SEALING);
+	mfd_assert_has_seals(fd, 0);
+
+	pid = spawn_idle_thread(0);
+	mfd_assert_add_seals(fd, F_SEAL_SEAL);
+	mfd_assert_has_seals(fd, F_SEAL_SEAL);
+
+	mfd_fail_add_seals(fd, F_SEAL_WRITE);
+	mfd_assert_has_seals(fd, F_SEAL_SEAL);
+
+	join_idle_thread(pid);
+
+	mfd_fail_add_seals(fd, F_SEAL_WRITE);
+	mfd_assert_has_seals(fd, F_SEAL_SEAL);
+
+	close(fd);
+}
+
+int main(int argc, char **argv)
+{
+	pid_t pid;
+
+	printf("memfd: CREATE\n");
+	test_create();
+	printf("memfd: BASIC\n");
+	test_basic();
+
+	printf("memfd: SEAL-WRITE\n");
+	test_seal_write();
+	printf("memfd: SEAL-SHRINK\n");
+	test_seal_shrink();
+	printf("memfd: SEAL-GROW\n");
+	test_seal_grow();
+	printf("memfd: SEAL-RESIZE\n");
+	test_seal_resize();
+
+	printf("memfd: SHARE-DUP\n");
+	test_share_dup();
+	printf("memfd: SHARE-MMAP\n");
+	test_share_mmap();
+	printf("memfd: SHARE-OPEN\n");
+	test_share_open();
+	printf("memfd: SHARE-FORK\n");
+	test_share_fork();
+
+	/* Run test-suite in a multi-threaded environment with a shared
+	 * file-table. */
+	pid = spawn_idle_thread(CLONE_FILES | CLONE_FS | CLONE_VM);
+	printf("memfd: SHARE-DUP (shared file-table)\n");
+	test_share_dup();
+	printf("memfd: SHARE-MMAP (shared file-table)\n");
+	test_share_mmap();
+	printf("memfd: SHARE-OPEN (shared file-table)\n");
+	test_share_open();
+	printf("memfd: SHARE-FORK (shared file-table)\n");
+	test_share_fork();
+	join_idle_thread(pid);
+
+	printf("memfd: DONE\n");
+
+	return 0;
+}
diff --git a/tools/testing/selftests/memfd/run_fuse_test.sh b/tools/testing/selftests/memfd/run_fuse_test.sh
new file mode 100644
index 000000000000..69b930e1e041
--- /dev/null
+++ b/tools/testing/selftests/memfd/run_fuse_test.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+if test -d "./mnt" ; then
+	fusermount -u ./mnt
+	rmdir ./mnt
+fi
+
+set -e
+
+mkdir mnt
+./fuse_mnt ./mnt
+./fuse_test ./mnt/memfd
+fusermount -u ./mnt
+rmdir ./mnt
diff --git a/tools/testing/selftests/ptrace/peeksiginfo.c b/tools/testing/selftests/ptrace/peeksiginfo.c
index d46558b1f58d..c34cd8ac8aaa 100644
--- a/tools/testing/selftests/ptrace/peeksiginfo.c
+++ b/tools/testing/selftests/ptrace/peeksiginfo.c
@@ -31,6 +31,10 @@ static int sys_ptrace(int request, pid_t pid, void *addr, void *data)
 #define TEST_SICODE_PRIV	-1
 #define TEST_SICODE_SHARE	-2
 
+#ifndef PAGE_SIZE
+#define PAGE_SIZE sysconf(_SC_PAGESIZE)
+#endif
+
 #define err(fmt, ...)						\
 		fprintf(stderr,					\
 			"Error (%s:%d): " fmt,			\
author	Linus Torvalds <torvalds@linux-foundation.org>	2014-08-08 15:57:47 -0700
committer	Linus Torvalds <torvalds@linux-foundation.org>	2014-08-08 15:57:47 -0700
commit	8065be8d032f38da25b54bf077a05a30d9ce9f2a (patch)
tree	32a7baf4b40e0240ab4b9dd6f2bbe6129929bb66
parent	27d438c56009e5ae632de36fe70985d1aab5e344 (diff)
parent	ecc265fe9e09e32a3573b2ba26e79b2099eb8bbb (diff)