linux-toradex.git/arch/arm/include, branch v4.5-rc4

ARM: wire up copy_file_range() syscall

2016-01-27T18:14:46+00:00

Add the copy_file_range() syscall to ARM.

Signed-off-by: Russell King

Merge branch 'akpm' (patches from Andrew)

2016-01-21T20:32:08+00:00

Merge third patch-bomb from Andrew Morton:
 "I'm pretty much done for -rc1 now:

   - the rest of MM, basically

   - lib/ updates

   - checkpatch, epoll, hfs, fatfs, ptrace, coredump, exit

   - cpu_mask simplifications

   - kexec, rapidio, MAINTAINERS etc, etc.

   - more dma-mapping cleanups/simplifications from hch"

* emailed patches from Andrew Morton : (109 commits)
  MAINTAINERS: add/fix git URLs for various subsystems
  mm: memcontrol: add "sock" to cgroup2 memory.stat
  mm: memcontrol: basic memory statistics in cgroup2 memory controller
  mm: memcontrol: do not uncharge old page in page cache replacement
  Documentation: cgroup: add memory.swap.{current,max} description
  mm: free swap cache aggressively if memcg swap is full
  mm: vmscan: do not scan anon pages if memcg swap limit is hit
  swap.h: move memcg related stuff to the end of the file
  mm: memcontrol: replace mem_cgroup_lruvec_online with mem_cgroup_online
  mm: vmscan: pass memcg to get_scan_count()
  mm: memcontrol: charge swap to cgroup2
  mm: memcontrol: clean up alloc, online, offline, free functions
  mm: memcontrol: flatten struct cg_proto
  mm: memcontrol: rein in the CONFIG space madness
  net: drop tcp_memcontrol.c
  mm: memcontrol: introduce CONFIG_MEMCG_LEGACY_KMEM
  mm: memcontrol: allow to disable kmem accounting for cgroup2
  mm: memcontrol: account "kmem" consumers in cgroup2 memory controller
  mm: memcontrol: move kmem accounting code to CONFIG_MEMCG
  mm: memcontrol: separate kmem code from legacy tcp accounting code
  ...

Merge tag 'armsoc-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2016-01-21T02:03:56+00:00

Pull ARM SoC multiplatform code updates from Arnd Bergmann:
 "This branch is the culmination of 5 years of effort to bring the ARMv6
  and ARMv7 platforms together such that they can all be enabled and
  boot the same kernel.  It has been a tremendous amount of cleanup and
  refactoring by a huge number of people, and creation of several new
  (and major) subsystems to better abstract out all the platform details
  in an appropriate manner.

  The bulk of this branch is a large patchset from Arnd that brings
  several of the more minor and older platforms we have closer to
  multiplatform support.  Among these are MMP, S3C64xx, Orion5x, mv78xx0
  and realview Much of this is moving around header files from old mach
  directories, but there are also some cleanup patches of debug_ll
  (lowlevel debug per-platform options) and other parts.

  Linus Walleij also has some patchs to clean up the older ARM Realview
  platforms by finally introducing DT support, and Rob Herring has some
  for ARM Versatile which is now DT-only.  Both of these platforms are
  now multiplatform.

  Finally, a couple of patches from Russell for Dove PMU, and a fix from
  Valentin Rothberg for Exynos ADC, which were rebased on top of the
  series to avoid conflicts"

* tag 'armsoc-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (75 commits)
  ARM: realview: don't select SMP_ON_UP for UP builds
  ARM: s3c: simplify s3c_irqwake_{e,}intallow definition
  ARM: s3c64xx: fix pm-debug compilation
  iio: exynos-adc: fix irqf_oneshot.cocci warnings
  ARM: realview: build realview-dt SMP support only when used
  ARM: realview: select apropriate targets
  ARM: realview: clean up header files
  ARM: realview: make all header files local
  ARM: no longer make CPU targets visible separately
  ARM: integrator: use explicit core module options
  ARM: realview: enable multiplatform
  ARM: make default platform work for NOMMU
  ARM: debug-ll: move DEBUG_LL_UART_EFM32 to correct Kconfig location
  ARM: defconfig: use correct debug_ll settings
  ARM: versatile: convert to multi-platform
  ARM: versatile: merge mach code into a single file
  ARM: versatile: switch to DT only booting and remove legacy code
  ARM: versatile: add DT based PCI detection
  ARM: pxa: mark ezx structures as __maybe_unused
  ARM: pxa: mark raumfeld init functions as __maybe_unused
  ...

Merge tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2016-01-21T01:55:20+00:00

Pull ARM SoC cleanups from Olof Johansson:
 "A smallish number of general cleanup commits this release cycle.  Some
  of these are minor tweaks:

   - shmobile change of binding for their GIC (using arm,pl390 now)
   - ARCH_RENESAS introduction
   - Misc other renesas updates

  There's also a couple of treewide commits from Masahiro Yamada
  cleaning up const/__initconst for SMP operation structs and a switch
  to using "depends on" instead of if-constructs on most of the Kconfig
  platform targets"

* tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  staging: board: armadillo800eva: Use "arm,pl390"
  staging: board: kzm9d: Use "arm,pl390"
  ARM: shmobile: r8a7778 dtsi: Use "arm,pl390" for GIC
  ARM: shmobile: emev2 dtsi: Use "arm,pl390" for GIC
  ARM: shmobile: r8a7740 dtsi: Use "arm,pl390" for GIC
  ARM: shmobile: r7s72100 dtsi: Use "arm,pl390" for GIC
  ARM: use "depends on" for SoC configs instead of "if" after prompt
  ARM/clocksource: use automatic DT probing for ux500 PRCMU
  ARM: use const and __initconst for smp_operations
  ARM: hisi: do not export smp_operations structures
  ARM: mvebu: remove unused mach/gpio.h
  ARM: shmobile: Remove legacy mach/irqs.h
  ARM: shmobile: Introduce ARCH_RENESAS
  MAINTAINERS: Remove link to oss.renesas.com which is closed

Merge tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2016-01-21T01:30:20+00:00

Pull asm-generic updates from Arnd Bergmann:
 "The asm-generic tree this time contains one series from Nicolas Pitre
  that makes the optimized do_div() implementation from the ARM
  architecture available to all architectures.

  This also adds stricter type checking for callers of do_div, which has
  uncovered a number of bugs in existing code, and fixes up the ones we
  have found"

* tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  ARM: asm/div64.h: adjust to generic codde
  __div64_32(): make it overridable at compile time
  __div64_const32(): abstract out the actual 128-bit cross product code
  do_div(): generic optimization for constant divisor on 32-bit machines
  div64.h: optimize do_div() for power-of-two constant divisors
  mtd/sm_ftl.c: fix wrong do_div() usage
  drm/mgag200/mgag200_mode.c: fix wrong do_div() usage
  hid-sensor-hub.c: fix wrong do_div() usage
  ti/fapll: fix wrong do_div() usage
  ti/clkt_dpll: fix wrong do_div() usage
  tegra/clk-divider: fix wrong do_div() usage
  imx/clk-pllv2: fix wrong do_div() usage
  imx/clk-pllv1: fix wrong do_div() usage
  nouveau/nvkm/subdev/clk/gk20a.c: fix wrong do_div() usage

dma-mapping: always provide the dma_map_ops based implementation

2016-01-21T01:09:18+00:00

Move the generic implementation to  now that all
architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now
that everyone supports them.

[valentinrothberg@gmail.com: remove leftovers in Kconfig]
Signed-off-by: Christoph Hellwig 
Cc: "David S. Miller" 
Cc: Aurelien Jacquiot 
Cc: Chris Metcalf 
Cc: David Howells 
Cc: Geert Uytterhoeven 
Cc: Haavard Skinnemoen 
Cc: Hans-Christian Egtvedt 
Cc: Helge Deller 
Cc: James Hogan 
Cc: Jesper Nilsson 
Cc: Koichi Yasutake 
Cc: Ley Foon Tan 
Cc: Mark Salter 
Cc: Mikael Starvik 
Cc: Steven Miao 
Cc: Vineet Gupta 
Cc: Christian Borntraeger 
Cc: Joerg Roedel 
Cc: Sebastian Ott 
Signed-off-by: Valentin Rothberg 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

2016-01-19T00:44:24+00:00

Pull virtio barrier rework+fixes from Michael Tsirkin:
 "This adds a new kind of barrier, and reworks virtio and xen to use it.

  Plus some fixes here and there"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (44 commits)
  checkpatch: add virt barriers
  checkpatch: check for __smp outside barrier.h
  checkpatch.pl: add missing memory barriers
  virtio: make find_vqs() checkpatch.pl-friendly
  virtio_balloon: fix race between migration and ballooning
  virtio_balloon: fix race by fill and leak
  s390: more efficient smp barriers
  s390: use generic memory barriers
  xen/events: use virt_xxx barriers
  xen/io: use virt_xxx barriers
  xenbus: use virt_xxx barriers
  virtio_ring: use virt_store_mb
  sh: move xchg_cmpxchg to a header by itself
  sh: support 1 and 2 byte xchg
  virtio_ring: update weak barriers to use virt_xxx
  Revert "virtio_ring: Update weak barriers to use dma_wmb/rmb"
  asm-generic: implement virt_xxx memory barriers
  x86: define __smp_xxx
  xtensa: define __smp_xxx
  tile: define __smp_xxx
  ...

kvm: rename pfn_t to kvm_pfn_t

2016-01-16T01:56:32+00:00

To date, we have implemented two I/O usage models for persistent memory,
PMEM (a persistent "ram disk") and DAX (mmap persistent memory into
userspace).  This series adds a third, DAX-GUP, that allows DAX mappings
to be the target of direct-i/o.  It allows userspace to coordinate
DMA/RDMA from/to persistent memory.

The implementation leverages the ZONE_DEVICE mm-zone that went into
4.3-rc1 (also discussed at kernel summit) to flag pages that are owned
and dynamically mapped by a device driver.  The pmem driver, after
mapping a persistent memory range into the system memmap via
devm_memremap_pages(), arranges for DAX to distinguish pfn-only versus
page-backed pmem-pfns via flags in the new pfn_t type.

The DAX code, upon seeing a PFN_DEV+PFN_MAP flagged pfn, flags the
resulting pte(s) inserted into the process page tables with a new
_PAGE_DEVMAP flag.  Later, when get_user_pages() is walking ptes it keys
off _PAGE_DEVMAP to pin the device hosting the page range active.
Finally, get_page() and put_page() are modified to take references
against the device driver established page mapping.

Finally, this need for "struct page" for persistent memory requires
memory capacity to store the memmap array.  Given the memmap array for a
large pool of persistent may exhaust available DRAM introduce a
mechanism to allocate the memmap from persistent memory.  The new
"struct vmem_altmap *" parameter to devm_memremap_pages() enables
arch_add_memory() to use reserved pmem capacity rather than the page
allocator.

This patch (of 18):

The core has developed a need for a "pfn_t" type [1].  Move the existing
pfn_t in KVM to kvm_pfn_t [2].

[1]: https://lists.01.org/pipermail/linux-nvdimm/2015-September/002199.html
[2]: https://lists.01.org/pipermail/linux-nvdimm/2015-September/002218.html

Signed-off-by: Dan Williams 
Acked-by: Christoffer Dall 
Cc: Paolo Bonzini 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

arch/arm/include/asm/pgtable-3level.h: add pmd_mkclean for THP

2016-01-16T01:56:32+00:00

MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent overwrite
of the contents since MADV_FREE syscall is called for THP page.

This patch adds pmd_mkclean for THP page MADV_FREE support.

Signed-off-by: Minchan Kim 
Cc: Catalin Marinas 
Cc: Will Deacon 
Cc: Russell King 
Cc: "James E.J. Bottomley" 
Cc: "Kirill A. Shutemov" 
Cc: Shaohua Li 
Cc: 
Cc: Andrea Arcangeli 
Cc: Andy Lutomirski 
Cc: Arnd Bergmann 
Cc: Benjamin Herrenschmidt 
Cc: Chen Gang 
Cc: Chris Zankel 
Cc: Daniel Micay 
Cc: Darrick J. Wong 
Cc: David S. Miller 
Cc: Helge Deller 
Cc: Hugh Dickins 
Cc: Ivan Kokshaysky 
Cc: Jason Evans 
Cc: Johannes Weiner 
Cc: KOSAKI Motohiro 
Cc: Kirill A. Shutemov 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Mel Gorman 
Cc: Michael Kerrisk 
Cc: Michal Hocko 
Cc: Mika Penttil 
Cc: Ralf Baechle 
Cc: Richard Henderson 
Cc: Rik van Riel 
Cc: Roland Dreier 
Cc: Shaohua Li 
Cc: Wu Fengguang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

arm, thp: remove infrastructure for handling splitting PMDs

2016-01-16T01:56:32+00:00

With new refcounting we don't need to mark PMDs splitting.  Let's drop
code to handle this.

pmdp_splitting_flush() is not needed too: on splitting PMD we will do
pmdp_clear_flush() + set_pte_at().  pmdp_clear_flush() will do IPI as
needed for fast_gup.

[arnd@arndb.de: fix unterminated ifdef in header file]
Signed-off-by: Kirill A. Shutemov 
Cc: Sasha Levin 
Cc: Aneesh Kumar K.V 
Cc: Jerome Marchand 
Cc: Vlastimil Babka 
Cc: Andrea Arcangeli 
Cc: Hugh Dickins 
Cc: Dave Hansen 
Cc: Mel Gorman 
Cc: Rik van Riel 
Cc: Vlastimil Babka 
Cc: Steve Capper 
Cc: Johannes Weiner 
Cc: Michal Hocko 
Cc: Christoph Lameter 
Cc: David Rientjes 
Signed-off-by: Arnd Bergmann 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds