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2014-01-21mm: add overcommit_kbytes sysctl variableJerome Marchand
Some applications that run on HPC clusters are designed around the availability of RAM and the overcommit ratio is fine tuned to get the maximum usage of memory without swapping. With growing memory, the 1%-of-all-RAM grain provided by overcommit_ratio has become too coarse for these workload (on a 2TB machine it represents no less than 20GB). This patch adds the new overcommit_kbytes sysctl variable that allow a much finer grain. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix nommu build] Signed-off-by: Jerome Marchand <jmarchan@redhat.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm, show_mem: remove SHOW_MEM_FILTER_PAGE_COUNTMel Gorman
Commit 4b59e6c47309 ("mm, show_mem: suppress page counts in non-blockable contexts") introduced SHOW_MEM_FILTER_PAGE_COUNT to suppress PFN walks on large memory machines. Commit c78e93630d15 ("mm: do not walk all of system memory during show_mem") avoided a PFN walk in the generic show_mem helper which removes the requirement for SHOW_MEM_FILTER_PAGE_COUNT in that case. This patch removes PFN walkers from the arch-specific implementations that report on a per-node or per-zone granularity. ARM and unicore32 still do a PFN walk as they report memory usage on each bank which is a much finer granularity where the debugging information may still be of use. As the remaining arches doing PFN walks have relatively small amounts of memory, this patch simply removes SHOW_MEM_FILTER_PAGE_COUNT. [akpm@linux-foundation.org: fix parisc] Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: David Rientjes <rientjes@google.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: James Bottomley <jejb@parisc-linux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm/vmalloc: interchage the implementation of vmalloc_to_{pfn,page}Jianyu Zhan
Currently we are implementing vmalloc_to_pfn() as a wrapper around vmalloc_to_page(), which is implemented as follow: 1. walks the page talbes to generates the corresponding pfn, 2. then converts the pfn to struct page, 3. returns it. And vmalloc_to_pfn() re-wraps vmalloc_to_page() to get the pfn. This seems too circuitous, so this patch reverses the way: implement vmalloc_to_page() as a wrapper around vmalloc_to_pfn(). This makes vmalloc_to_pfn() and vmalloc_to_page() slightly more efficient. No functional change. Signed-off-by: Jianyu Zhan <nasa4836@gmail.com> Cc: Vladimir Murzin <murzin.v@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm, mempolicy: remove unneeded functions for UMA configsDavid Rientjes
Mempolicies only exist for CONFIG_NUMA configurations. Therefore, a certain class of functions are unneeded in configurations where CONFIG_NUMA is disabled such as functions that duplicate existing mempolicies, lookup existing policies, set certain mempolicy traits, or test mempolicies for certain attributes. Remove the unneeded functions so that any future callers get a compile- time error and protect their code with CONFIG_NUMA as required. Signed-off-by: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm/hugetlb.c: call MMU notifiers when copying a hugetlb page rangeAndreas Sandberg
When copy_hugetlb_page_range() is called to copy a range of hugetlb mappings, the secondary MMUs are not notified if there is a protection downgrade, which breaks COW semantics in KVM. This patch adds the necessary MMU notifier calls. Signed-off-by: Andreas Sandberg <andreas@sandberg.pp.se> Acked-by: Steve Capper <steve.capper@linaro.org> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm, memory-failure: fix typo in me_pagecache_dirty()Zhi Yong Wu
[akpm@linux-foundation.org: s/cache/pagecache/] Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm: create a separate slab for page->ptl allocationKirill A. Shutemov
If DEBUG_SPINLOCK and DEBUG_LOCK_ALLOC are enabled spinlock_t on x86_64 is 72 bytes. For page->ptl they will be allocated from kmalloc-96 slab, so we loose 24 on each. An average system can easily allocate few tens thousands of page->ptl and overhead is significant. Let's create a separate slab for page->ptl allocation to solve this. To make sure that it really works this time, some numbers from my test machine (just booted, no load): Before: # grep '^\(kmalloc-96\|page->ptl\)' /proc/slabinfo kmalloc-96 31987 32190 128 30 1 : tunables 120 60 8 : slabdata 1073 1073 92 After: # grep '^\(kmalloc-96\|page->ptl\)' /proc/slabinfo page->ptl 27516 28143 72 53 1 : tunables 120 60 8 : slabdata 531 531 9 kmalloc-96 3853 5280 128 30 1 : tunables 120 60 8 : slabdata 176 176 0 Note that the patch is useful not only for debug case, but also for PREEMPT_RT, where spinlock_t is always bloated. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm: get rid of unnecessary pageblock scanning in setup_zone_migrate_reserveYasuaki Ishimatsu
Yasuaki Ishimatsu reported memory hot-add spent more than 5 _hours_ on 9TB memory machine since onlining memory sections is too slow. And we found out setup_zone_migrate_reserve spent >90% of the time. The problem is, setup_zone_migrate_reserve scans all pageblocks unconditionally, but it is only necessary if the number of reserved block was reduced (i.e. memory hot remove). Moreover, maximum MIGRATE_RESERVE per zone is currently 2. It means that the number of reserved pageblocks is almost always unchanged. This patch adds zone->nr_migrate_reserve_block to maintain the number of MIGRATE_RESERVE pageblocks and it reduces the overhead of setup_zone_migrate_reserve dramatically. The following table shows time of onlining a memory section. Amount of memory | 128GB | 192GB | 256GB| --------------------------------------------- linux-3.12 | 23.9 | 31.4 | 44.5 | This patch | 8.3 | 8.3 | 8.6 | Mel's proposal patch | 10.9 | 19.2 | 31.3 | --------------------------------------------- (millisecond) 128GB : 4 nodes and each node has 32GB of memory 192GB : 6 nodes and each node has 32GB of memory 256GB : 8 nodes and each node has 32GB of memory (*1) Mel proposed his idea by the following threads. https://lkml.org/lkml/2013/10/30/272 [akpm@linux-foundation.org: tweak comment] Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Reported-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Tested-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Mel Gorman <mgorman@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21/proc/meminfo: provide estimated available memoryRik van Riel
Many load balancing and workload placing programs check /proc/meminfo to estimate how much free memory is available. They generally do this by adding up "free" and "cached", which was fine ten years ago, but is pretty much guaranteed to be wrong today. It is wrong because Cached includes memory that is not freeable as page cache, for example shared memory segments, tmpfs, and ramfs, and it does not include reclaimable slab memory, which can take up a large fraction of system memory on mostly idle systems with lots of files. Currently, the amount of memory that is available for a new workload, without pushing the system into swap, can be estimated from MemFree, Active(file), Inactive(file), and SReclaimable, as well as the "low" watermarks from /proc/zoneinfo. However, this may change in the future, and user space really should not be expected to know kernel internals to come up with an estimate for the amount of free memory. It is more convenient to provide such an estimate in /proc/meminfo. If things change in the future, we only have to change it in one place. Signed-off-by: Rik van Riel <riel@redhat.com> Reported-by: Erik Mouw <erik.mouw_2@nxp.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm: thp: turn compound_head() into BUG_ON(!PageTail) in get_huge_page_tail()Oleg Nesterov
get_huge_page_tail()->compound_head() looks confusing. Every caller must check PageTail(page), otherwise atomic_inc(&page->_mapcount) is simply wrong if this page is compound-trans-head. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Dave Jones <davej@redhat.com> Cc: Darren Hart <dvhart@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mel Gorman <mgorman@suse.de> Acked-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm: thp: __get_page_tail_foll() can use get_huge_page_tail()Oleg Nesterov
Cleanup. Change __get_page_tail_foll() to use get_huge_page_tail() to avoid the code duplication. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Dave Jones <davej@redhat.com> Cc: Darren Hart <dvhart@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mel Gorman <mgorman@suse.de> Acked-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm/hugetlb.c: defer PageHeadHuge() symbol exportAndrea Arcangeli
No actual need of it. So keep it internal. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Pravin Shelar <pshelar@nicira.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ben Hutchings <bhutchings@solarflare.com> Cc: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm/swap.c: reorganize put_compound_page()Andrew Morton
Tweak it so save a tab stop, make code layout slightly less nutty. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Pravin Shelar <pshelar@nicira.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ben Hutchings <bhutchings@solarflare.com> Cc: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm/hugetlb.c: simplify PageHeadHuge() and PageHuge()Andrew Morton
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Pravin Shelar <pshelar@nicira.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ben Hutchings <bhutchings@solarflare.com> Cc: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm: hugetlbfs: use __compound_tail_refcounted in __get_page_tail tooAndrea Arcangeli
Also remove hugetlb.h which isn't needed anymore as PageHeadHuge is handled in mm.h. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Pravin Shelar <pshelar@nicira.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ben Hutchings <bhutchings@solarflare.com> Cc: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm: tail page refcounting optimization for slab and hugetlbfsAndrea Arcangeli
This skips the _mapcount mangling for slab and hugetlbfs pages. The main trouble in doing this is to guarantee that PageSlab and PageHeadHuge remains constant for all get_page/put_page run on the tail of slab or hugetlbfs compound pages. Otherwise if they're set during get_page but not set during put_page, the _mapcount of the tail page would underflow. PageHeadHuge will remain true until the compound page is released and enters the buddy allocator so it won't risk to change even if the tail page is the last reference left on the page. PG_slab instead is cleared before the slab frees the head page with put_page, so if the tail pin is released after the slab freed the page, we would have a problem. But in the slab case the tail pin cannot be the last reference left on the page. This is because the slab code is free to reuse the compound page after a kfree/kmem_cache_free without having to check if there's any tail pin left. In turn all tail pins must be always released while the head is still pinned by the slab code and so we know PG_slab will be still set too. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com> Cc: Pravin Shelar <pshelar@nicira.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ben Hutchings <bhutchings@solarflare.com> Cc: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm: thp: optimize compound_trans_hugeAndrea Arcangeli
Currently we don't clobber page_tail->first_page during split_huge_page, so compound_trans_head can be set to compound_head without adverse effects, and this mostly optimizes away a smp_rmb. It looks worthwhile to keep around the implementation that doesn't relay on page_tail->first_page not to be clobbered, because it would be necessary if we'll decide to enforce page->private to zero at all times whenever PG_private is not set, also for anonymous pages. For anonymous pages enforcing such an invariant doesn't matter as anonymous pages don't use page->private so we can get away with this microoptimization. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Pravin Shelar <pshelar@nicira.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ben Hutchings <bhutchings@solarflare.com> Cc: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm: hugetlbfs: move the put/get_page slab and hugetlbfs optimization in a ↵Andrea Arcangeli
faster path We don't actually need a reference on the head page in the slab and hugetlbfs paths, as long as we add a smp_rmb() which should be faster than get_page_unless_zero. [akpm@linux-foundation.org: fix typo in comment] Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Pravin Shelar <pshelar@nicira.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ben Hutchings <bhutchings@solarflare.com> Cc: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm: hugetlb: use get_page_foll() in follow_hugetlb_page()Andrea Arcangeli
get_page_foll() is more optimal and is always safe to use under the PT lock. More so for hugetlbfs as there's no risk of race conditions with split_huge_page regardless of the PT lock. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Tested-by: Khalid Aziz <khalid.aziz@oracle.com> Cc: Pravin Shelar <pshelar@nicira.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ben Hutchings <bhutchings@solarflare.com> Cc: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm: hugetlbfs: Add some VM_BUG_ON()s to catch non-hugetlbfs pagesDave Hansen
Dave Jiang reported that he was seeing oopses when running NUMA systems and default_hugepagesz=1G. I traced the issue down to migrate_page_copy() trying to use the same code for hugetlb pages and transparent hugepages. It should not have been trying to pass thp pages in there. So, add some VM_BUG_ON()s for the next hapless VM developer that tries the same thing. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Tested-by: Dave Jiang <dave.jiang@intel.com> Acked-by: Mel Gorman <mgorman@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21mm: Make {,set}page_address() static inline if WANT_PAGE_VIRTUALGeert Uytterhoeven
{,set}page_address() are macros if WANT_PAGE_VIRTUAL. If !WANT_PAGE_VIRTUAL, they're plain C functions. If someone calls them with a void *, this pointer is auto-converted to struct page * if !WANT_PAGE_VIRTUAL, but causes a build failure on architectures using WANT_PAGE_VIRTUAL (arc, m68k and sparc64): drivers/md/bcache/bset.c: In function `__btree_sort': drivers/md/bcache/bset.c:1190: warning: dereferencing `void *' pointer drivers/md/bcache/bset.c:1190: error: request for member `virtual' in something not a structure or union Convert them to static inline functions to fix this. There are already plenty of users of struct page members inside <linux/mm.h>, so there's no reason to keep them as macros. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Guenter Roeck <linux@roeck-us.net> Tested-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21fs/ramfs: don't use module_init for non-modular core codePaul Gortmaker
The ramfs is always built in. It will never be modular, so using module_init as an alias for __initcall is rather misleading. Fix this up now, so that we can relocate module_init from init.h into module.h in the future. If we don't do this, we'd have to add module.h to obviously non-modular code, and that would be a worse thing. Note that direct use of __initcall is discouraged, vs. one of the priority categorized subgroups. As __initcall gets mapped onto device_initcall, our use of fs_initcall (which makes sense for fs code) will thus change this registration from level 6-device to level 5-fs (i.e. slightly earlier). However no observable impact of that small difference has been observed during testing, or is expected. Also note that this change uncovers a missing semicolon bug in the registration of the initcall. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21fs/super.c: fix WARN on alloc_super() fail pathVladimir Davydov
On fail path alloc_super() calls destroy_super(), which issues a warning if the sb's s_mounts list is not empty, in particular if it has not been initialized. That said s_mounts must be initialized in alloc_super() before any possible failure, but currently it is initialized close to the end of the function leading to a useless warning dumped to log if either percpu_counter_init() or list_lru_init() fails. Let's fix this. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21fs/read_write.c:compat_readv(): remove bogus area verifyCorey Minyard
The compat_do_readv_writev() function was doing a verify_area on the incoming iov, but the nr_segs value is not checked. If someone passes in a -1 for nr_segs, for instance, the function should return an EINVAL. However, it returns a EFAULT because the verify_area fails because it is checking an array of size MAX_UINT. The check is bogus, anyway, because the next check, compat_rw_copy_check_uvector(), will do all the necessary checking, anyway. The non-compat do_readv_writev() function doesn't do this check, so I think it's safe to just remove the code. Signed-off-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21fs/compat_ioctl.c: fix an underflow issue (harmless)Dan Carpenter
We cap "nmsgs" at I2C_RDRW_IOCTL_MAX_MSGS (42) but the current code allows negative values. It's harmless but it makes my static checker upset so I've made nsmgs unsigned. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21posix_acl: uninliningAndrew Morton
Uninline vast tracts of nested inline functions in include/linux/posix_acl.h. This reduces the text+data+bss size of x86_64 allyesconfig vmlinux by 8026 bytes. The patch also regularises the positioning of the EXPORT_SYMBOLs in posix_acl.c. Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Tested-by: Benny Halevy <bhalevy@primarydata.com> Cc: Benny Halevy <bhalevy@panasas.com> Cc: Andreas Gruenbacher <agruen@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21arch/sh/kernel/kgdb.c: add missing #include <linux/sched.h>Wanlong Gao
arch/sh/kernel/kgdb.c: In function 'sleeping_thread_to_gdb_regs': arch/sh/kernel/kgdb.c:225:32: error: implicit declaration of function 'task_stack_page' [-Werror=implicit-function-declaration] arch/sh/kernel/kgdb.c:242:23: error: dereferencing pointer to incomplete type arch/sh/kernel/kgdb.c:243:22: error: dereferencing pointer to incomplete type arch/sh/kernel/kgdb.c: In function 'singlestep_trap_handler': arch/sh/kernel/kgdb.c:310:27: error: 'SIGTRAP' undeclared (first use in this function) arch/sh/kernel/kgdb.c:310:27: note: each undeclared identifier is reported only once for each function it appears in This was introduced by commit 16559ae48c76 ("kgdb: remove #include <linux/serial_8250.h> from kgdb.h"). [geert@linux-m68k.org: reworded and reformatted] Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com> Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Reported-by: Fengguang Wu <fengguang.wu@intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: fix NULL pointer dereference when dismount and ocfs2rec simultaneouslyYiwen Jiang
2 nodes cluster, say Node A and Node B, mount the same ocfs2 volume, and create a file 1. Node A Node B open 1, get open lock rm 1, and then add 1 to orphan_dir storage link down, o2hb_write_timeout ->o2quo_disk_timeout ->emergency_restart at the moment, Node B dismount and do ocfs2rec simultaneously 1) ocfs2_dismount_volume ->ocfs2_recovery_exit ->wait_event(osb->recovery_event) ->flush_workqueue(ocfs2_wq) 2) ocfs2rec ->queue_work(&journal->j_recovery_work) ->ocfs2_recover_orphans ->ocfs2_commit_truncate ->queue_delayed_work(&osb->osb_truncate_log_wq) In ocfs2_recovery_exit, it flushes workqueue and then releases system inodes. When doing ocfs2rec, it will call ocfs2_flush_truncate_log which will try to get sys_root_inode, and NULL pointer dereference occurs. Signed-off-by: Yiwen Jiang <jiangyiwen@huawei.com> Signed-off-by: joyce <xuejiufei@huawei.com> Signed-off-by: Joseph Qi <joseph.qi@huawei.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: punch hole should return EINVAL if the length argument in ioctl is ↵Tariq Saeed
negative An unreserve space ioctl OCFS2_IOC_UNRESVSP/64 should reject a negative length. Orabug:14789508 Signed-off-by: Tariq Saseed <tariq.x.saeed@oracle.com> Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: fix sparse non static symbol warningWei Yongjun
Fixes the following sparse warning: fs/ocfs2/stack_user.c:930:32: warning: symbol 'ocfs2_ls_ops' was not declared. Should it be static? Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: adjust minlen with discard_granularity in the FITRIM ioctlJie Liu
Adjust minlen with discard_granularity for FITRIM ioctl(2) if the given minimum size in bytes is less than it because, discard granularity is used to tell us that the minimum size of extent that can be discarded by the storage device. This is inspired by ext4 commit 5c2ed62fd447 ("ext4: Adjust minlen with discard_granularity in the FITRIM ioctl") from Lukas Czerner. Signed-off-by: Jie Liu <jeff.liu@oracle.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: return EINVAL if the given range to discard is less than block sizeJie Liu
For FITRIM ioctl(2), we should not keep silence if the given range length ls less than a block size as there is no data blocks would be discareded. Hence it should return EINVAL instead. This issue can be verified via xfstests/generic/288 which is used for FITRIM argument handling tests. Signed-off-by: Jie Liu <jeff.liu@oracle.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: return EOPNOTSUPP if the device does not support discardJie Liu
For FITRIM ioctl(2), we should return EOPNOTSUPP to inform the user that the storage device does not support discard if it is, otherwise return success would confuse the user even though there is no free blocks were trimmed at all. Signed-off-by: Jie Liu <jeff.liu@oracle.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: remove redundant ocfs2_alloc_dinode_update_counts() and ↵Younger Liu
ocfs2_block_group_set_bits() ocfs2_alloc_dinode_update_counts() and ocfs2_block_group_set_bits() are already provided in suballoc.c. So, the same functions in move_extents.c are not needed any more. Declare the functions in suballoc.h and remove redundant functions in move_extents.c. Signed-off-by: Younger Liu <liuyiyang@hisense.com> Cc: Younger Liu <younger.liucn@gmail.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: use the new DLM operation callbacks while requesting new lockspaceGoldwyn Rodrigues
Attempt to use the new DLM operations. If it is not supported, use the traditional ocfs2_controld. To exchange ocfs2 versioning, we use the LVB of the version dlm lock. It first attempts to take the lock in EX mode (non-blocking). If successful (which means it is the first mount), it writes the version number and downconverts to PR lock. If it is unsuccessful, it reads the version from the lock. If this becomes the standard (with o2cb as well), it could simplify userspace tools to check if the filesystem is mounted on other nodes. Dan: Since ocfs2_protocol_version are two u8 values, the additional checks with LONG* don't make sense. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: framework for version LVBGoldwyn Rodrigues
Use the native DLM locks for version control negotiation. Most of the framework is taken from gfs2/lock_dlm.c Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: pass ocfs2_cluster_connection to ocfs2_this_nodeGoldwyn Rodrigues
This is done to differentiate between using and not using controld and use the connection information accordingly. We need to be backward compatible. So, we use a new enum ocfs2_connection_type to identify when controld is used and when it is not. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: shift allocation ocfs2_live_connection to user_connect()Goldwyn Rodrigues
We perform this because the DLM recovery callbacks will require the ocfs2_live_connection structure to record the node information when dlm_new_lockspace() is updated (in the last patch of the series). Before calling dlm_new_lockspace(), we need the structure ready for the .recover_done() callback, which would set oc_this_node. This is the reason we allocate ocfs2_live_connection beforehand in user_connect(). [AKPM] rc initialization is not required because it assigned in case of errors. It will be cleared by compiler anyways. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Reveiwed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: add DLM recovery callbacksGoldwyn Rodrigues
These are the callbacks called by the fs/dlm code in case the membership changes. If there is a failure while/during calling any of these, the DLM creates a new membership and relays to the rest of the nodes. - recover_prep() is called when DLM understands a node is down. - recover_slot() is called once all nodes have acknowledged recover_prep and recovery can begin. - recover_done() is called once the recovery is complete. It returns the new membership. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: add clustername to cluster connectionGoldwyn Rodrigues
This is an effort of removing ocfs2_controld.pcmk and getting ocfs2 DLM handling up to the times with respect to DLM (>=4.0.1) and corosync (2.3.x). AFAIK, cman also is being phased out for a unified corosync cluster stack. fs/dlm performs all the functions with respect to fencing and node management and provides the API's to do so for ocfs2. For all future references, DLM stands for fs/dlm code. The advantages are: + No need to run an additional userspace daemon (ocfs2_controld) + No controld device handling and controld protocol + Shifting responsibilities of node management to DLM layer For backward compatibility, we are keeping the controld handling code. Once enough time has passed we can remove a significant portion of the code. This was tested by using the kernel with changes on older unmodified tools. The kernel used ocfs2_controld as expected, and displayed the appropriate warning message. This feature requires modification in the userspace ocfs2-tools. The changes can be found at: https://github.com/goldwynr/ocfs2-tools branch: nocontrold Currently, not many checks are present in the userspace code, but that would change soon. This patch (of 6): Add clustername to cluster connection. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21ocfs2: remove versioning informationGoldwyn Rodrigues
The versioning information is confusing for end-users. The numbers are stuck at 1.5.0 when the tools version have moved to 1.8.2. Remove the versioning system in the OCFS2 modules and let the kernel version be the guide to debug issues. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Acked-by: Sunil Mushran <sunil.mushran@gmail.com> Cc: Mark Fasheh <mfasheh@suse.com> Acked-by: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21score: remove "select HAVE_GENERIC_HARDIRQS" againGeert Uytterhoeven
Commit 5fbbf8a1a934 ("Score: The commit is for compiling successfully.") re-introduced "select HAVE_GENERIC_HARDIRQS" in v3.12-rc4, which had just been removed in v3.12-rc1 by 0244ad004a5 ("Remove GENERIC_HARDIRQ config option"). Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Chen Liqin <liqin.linux@gmail.com> Cc: Lennox Wu <lennox.wu@gmail.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21intel-iommu: fix off-by-one in pagetable freeingAlex Williamson
dma_pte_free_level() has an off-by-one error when checking whether a pte is completely covered by a range. Take for example the case of attempting to free pfn 0x0 - 0x1ff, ie. 512 entries covering the first 2M superpage. The level_size() is 0x200 and we test: static void dma_pte_free_level(... ... if (!(0 > 0 || 0x1ff < 0 + 0x200)) { ... } Clearly the 2nd test is true, which means we fail to take the branch to clear and free the pagetable entry. As a result, we're leaking pagetables and failing to install new pages over the range. This was found with a PCI device assigned to a QEMU guest using vfio-pci without a VGA device present. The first 1M of guest address space is mapped with various combinations of 4K pages, but eventually the range is entirely freed and replaced with a 2M contiguous mapping. intel-iommu errors out with something like: ERROR: DMA PTE for vPFN 0x0 already set (to 5c2b8003 not 849c00083) In this case 5c2b8003 is the pointer to the previous leaf page that was neither freed nor cleared and 849c00083 is the superpage entry that we're trying to replace it with. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Joerg Roedel <joro@8bytes.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21fsnotify: remove pointless NULL initializersJan Kara
We usually rely on the fact that struct members not specified in the initializer are set to NULL. So do that with fsnotify function pointers as well. Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Eric Paris <eparis@parisplace.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21fsnotify: remove .should_send_event callbackJan Kara
After removing event structure creation from the generic layer there is no reason for separate .should_send_event and .handle_event callbacks. So just remove the first one. Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Eric Paris <eparis@parisplace.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21fsnotify: do not share events between notification groupsJan Kara
Currently fsnotify framework creates one event structure for each notification event and links this event into all interested notification groups. This is done so that we save memory when several notification groups are interested in the event. However the need for event structure shared between inotify & fanotify bloats the event structure so the result is often higher memory consumption. Another problem is that fsnotify framework keeps path references with outstanding events so that fanotify can return open file descriptors with its events. This has the undesirable effect that filesystem cannot be unmounted while there are outstanding events - a regression for inotify compared to a situation before it was converted to fsnotify framework. For fanotify this problem is hard to avoid and users of fanotify should kind of expect this behavior when they ask for file descriptors from notified files. This patch changes fsnotify and its users to create separate event structure for each group. This allows for much simpler code (~400 lines removed by this patch) and also smaller event structures. For example on 64-bit system original struct fsnotify_event consumes 120 bytes, plus additional space for file name, additional 24 bytes for second and each subsequent group linking the event, and additional 32 bytes for each inotify group for private data. After the conversion inotify event consumes 48 bytes plus space for file name which is considerably less memory unless file names are long and there are several groups interested in the events (both of which are uncommon). Fanotify event fits in 56 bytes after the conversion (fanotify doesn't care about file names so its events don't have to have it allocated). A win unless there are four or more fanotify groups interested in the event. The conversion also solves the problem with unmount when only inotify is used as we don't have to grab path references for inotify events. [hughd@google.com: fanotify: fix corruption preventing startup] Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Eric Paris <eparis@parisplace.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21inotify: provide function for name length roundingJan Kara
Rounding of name length when passing it to userspace was done in several places. Provide a function to do it and use it in all places. Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Eric Paris <eparis@parisplace.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21dma-debug: introduce debug_dma_assert_idle()Dan Williams
Record actively mapped pages and provide an api for asserting a given page is dma inactive before execution proceeds. Placing debug_dma_assert_idle() in cow_user_page() flagged the violation of the dma-api in the NET_DMA implementation (see commit 77873803363c "net_dma: mark broken"). The implementation includes the capability to count, in a limited way, repeat mappings of the same page that occur without an intervening unmap. This 'overlap' counter is limited to the few bits of tag space in a radix tree. This mechanism is added to mitigate false negative cases where, for example, a page is dma mapped twice and debug_dma_assert_idle() is called after the page is un-mapped once. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: James Bottomley <JBottomley@Parallels.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-21Merge tag 'for-v3.14' of git://git.infradead.org/battery-2.6Linus Torvalds
Pull battery updates from Dmitry Eremin-Solenikov: "I'm picking up power supply maintainership from Anton Vorontov. Could you please pull battery-2.6 git tree changes prepared for the v3.14 release. Highlights: - Power supply notifier - Several drivers gained DT support - Added Maxim 14577 driver - Change of maintainer" * tag 'for-v3.14' of git://git.infradead.org/battery-2.6: MAINTAINERS: Pick up power supply maintainership max17042_battery: Add IRQF_ONESHOT flag to use default irq handler gpio-charger: Support wakeup events power_supply: Add charger support for Maxim 14577 dt: Binding documentation for isp1704 charger isp1704_charger: Add DT support charger-manager: of_cm_parse_desc() should be static bq2415x_charger: Add DT support power_supply: Add power_supply_get_by_phandle bq2415x_charger: Use power_supply notifier for automode power: reset: Add as3722 power-off driver mfd: AS3722: Add dt node properties for system power controller charger-manager: Support deivce tree in charger manager driver charger-manager: Modify the way of checking battery's temperature power_supply: Add power_supply notifier
2014-01-21Merge tag 'mfd-3.14-1' of git://git.linaro.org/people/ljones/mfdLinus Torvalds
Pull MFD changes from Lee Jones: "New drivers - Samsung Maxim 14577; Micro USB, Regulator, IRQ Controller and Battery Charger - TI/National Semiconductor LP3943 I2C GPIO Expander and PWM Generator Existing driver adaptions - Expansion of Wolfson Arizona DSP and High-Pass filter controls - TI TWL6040 default Regmap support and Regcache addition/bypass - Some nice Smatch catch fixes - Conversion of TI OMAP-USB and TI TWL6030 to endian neutralness - ChromeOS EC timing (delay) adaptions and added dependency on OF - Many constifications of 'struct {mfd_cell,regmap_irq,et.al}' - Watchdog support added for NVIDIA AS3722 - Convert functions to static in TI AM335x - Realigned previously defeated functionality in TI AM335x - IIO ADC-TSC concurrency dead-lock/timeout resolution - Addition of Power Management and Clock support for Samsung core - DEFINE_PCI_DEVICE_TABLE macro removal from MFD Subsystem - Greater use of irqdomain functionality in ST-E AB8500 - Removal of 'include/linux/mfd/abx500/ab8500-gpio.h' - Wolfson WM831x PMIC Power Management changes s/poweroff/shutdown/ - Device Tree documentation added for TI/Nat Semi LP3943 - Version detection and voltage tables for TI TPS6586x PMIC devices - Simplification of Freescale MC13XXX (de-)initialisation routines - Clean-up and simplification of the Realtek parent driver - Added support for RTL8402 Realtek PCI-Express card reader - Resource leak fix for Maxim 77686 - Possible suspend BUG() fix in OMAP USB TLL - Support for new Wolfson WM5110 Revision (D) - Testing of automatic assignment of of_node in mfd_add_device() - Reversion of the above when it started to cause issues - Remove legacy Platform Data from; TI TWL Core, Qualcomm SSBI and ST-E ABx500 Pinctrl - Clean-ups; tabbing issues, function name changes, 'drvdata = NULL' removal, unused uninitialised warning mitigation, error message clarity, removal of redundant/duplicate checks, licensing (GPL -> GPL2), coding consistency, duplicate function declaration, ret checks, commit corrections, redundant of_match_ptr() helper removal, spelling, #if-deffery removal and header guards name changes" * tag 'mfd-3.14-1' of git://git.linaro.org/people/ljones/mfd: (78 commits) mfd: wm5110: Add register patch for rev D chip mfd: omap-usb-tll: Don't hold lock during pm_runtime_get/put_sync() gpio: lp3943: Remove redundant of_match_ptr helper mfd: sta2x11-mfd: Use named constants for pci_power_t values Documentation: mfd: Fix LDO index in s2mps11.txt mfd: Cleanup mfd-mcp-sa11x0.h header mfd: max8997: Use "IS_ENABLED(CONFIG_OF)" for DT code. mfd: twl6030: Fix endianness problem in IRQ handler mfd: sec-core: Add cells for S5M8767-clocks mfd: max14577: Remove redundant of_match_ptr helper mfd: twl6040: Fix sparse non static symbol warning mfd: Revert "mfd: Always assign of_node in mfd_add_device()" mfd: rtsx: Fix sparse non static symbol warning mfd: max77693: Set proper maximum register for MUIC regmap mfd: max77686: Fix regmap resource leak on driver remove mfd: Represent correct filenames in file headers mfd: rtsx: Add support for card reader rtl8402 mfd: rtsx: Add set pull control macro and simplify rtl8411 mfd: max8997: Enforce mfd_add_devices() return value check mfd: mc13xxx: Simplify probe() & remove() ...
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