Rebuild bcm2835_defconfig using "make bcm2835_defconfig;
make savedefconfig", and add the following features:

* Enable the DWC2 USB controller present in the BCM2835 SoC.
* Enable drivers for various USB-hosted devices, which make the
  controller useful.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'renesas-boards2-for-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/boards

From Simon Horman:
Second Round of Renesas ARM based SoC Board updates for v3.14

* r8a7791 (R-Car M2) based Koelsch board
  - Let Koelsch multiplatform boot with Koelsch DTB
  - Remove non-multiplatform DT reference support
  - Instantiate clkdevs for SCIF and CMT
  - Remove duplicate CCF initialization
  - Add Ether and DU support

* r8a7790 (R-Car H2) based Lager board
  - Let Lager multiplatform boot with Lager DTB
  - Remove non-multiplatform DT reference support
  - Instantiate clkdevs for SCIF and CMT
  - Enable multiplaform kernel support

* r8a7740 (R-Mobile A1) based Armadillo board
  - Set backlight enable GPIO

* sh7374 (SH-Mobile AP4) based Mackerel board
  - Correct USBHS pinconf entry

* tag 'renesas-boards2-for-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas: (25 commits)
  ARM: shmobile: mackerel: Fix USBHS pinconf entry
  ARM: shmobile: Let Koelsch multiplatform boot with Koelsch DTB
  ARM: shmobile: Let Lager multiplatform boot with Lager DTB
  ARM: shmobile: Remove non-multiplatform Koelsch reference support
  ARM: shmobile: Remove non-multiplatform Lager reference support
  ARM: shmobile: koelsch-reference: Instantiate clkdevs for SCIF and CMT
  ARM: shmobile: lager-reference: Instantiate clkdevs for SCIF and CMT
  ARM: shmobile: koelsch-reference: Remove duplicate CCF initialization
  ARM: shmobile: lager-reference: Enable multiplaform kernel support
  ARM: shmobile: armadillo: Set backlight enable GPIO
  ARM: shmobile: Koelsch: add Ether support
  ARM: shmobile: koelsch: Add DU device
  arm: shmobile: clks: remove duplicated clock from r7s72100
  ARM: shmobile: koelsch: Conditionally select MICREL_PHY
  ARM: shmobile: rcar-gen2: Initialize CCF before clock sources
  ARM: shmobile: r8a7791: Add clock index macros for DT sources
  ARM: shmobile: r8a7790: Add clock index macros for DT sources
  ARM: shmobile: Add select MIGHT_HAVE_PCI for PCI-AHB bridge code
  ARM: shmobile: r8a7778: add USB Func DMAEngine support
  ARM: rcar-gen2: Do not setup timer in non-secure mode
  ...
Signed-off-by: Olof Johansson <olof@lixom.net>

* qcom/boards:
  ARM: msm_defconfig: Enable restart driver
  defconfig: msm_defconfig: Enable CONFIG_ARCH_MSM8974
  ARM: msm: Add support for APQ8074 Dragonboard
  ARM: dts: MSM8974: Add MMIO architected timer node
  ARM: dts: MSM8974: Add restart node
  ARM: msm: Simplify ARCH_MSM_DT config
  ARM: msm: Add support for MSM8974 SoC
  ARM: msm: trout: fix uninit var warning
Signed-off-by: Olof Johansson <olof@lixom.net>

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

This patch enables MSM8974 build support.
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

This patch adds basic board support for APQ8074 Dragonboard
which belongs to the Snapdragon 800 family.
For now, just support a basic machine with device tree.
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
Acked-by: Kumar Gala <galak@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
[olof: Split off SoC and board support in separate patches]
Signed-off-by: Olof Johansson <olof@lixom.net>

Add the mmio architected timer node.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

Add the restart node so we can reboot the device.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

This doesn't need to be a def_bool y. Instead we can have every
DT supported platform select ARCH_MSM_DT and we achieve the same
thing with less chance of conflicts.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

Add support for the Snapdragon 800 MSM8974 SoC, used on the Dragonboard
and others. Board support added in separate patch.
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>
Acked-by: Kumar Gala <galak@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
[olof: split off SoC support in separate patch]
Signed-off-by: Olof Johansson <olof@lixom.net>

Fix the following warning when !CONFIG_MMC:

arch/arm/mach-msm/board-trout.c: In function 'trout_init':
arch/arm/mach-msm/board-trout.c:67:6: warning: unused variable 'rc' [-Wunused-variable]
  int rc;
      ^

Also, while we're here, rework explicit printk(KERN_CRIT..) to use
pr_crit.
Signed-off-by: Josh Cartwright <joshc@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'renesas-defconfig2-for-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/boards

From Simon Horman:
Second Round of Renesas ARM Based SoC Defconfig Updates for v3.14

* r7s72100 SoC (RZ/A1H) based Genmai Board
  - Fixup I2C device on defconfig
  - Add gpio regulator support on defconfig

* r8a7791 (R-Car M2) based Koelsch board
  - Do not disable CONFIG_{INOTIFY_USER,UNIX} in defconfig
  - Enable CONFIG_PACKET in defconfig
  - Enable Ether in defconfig

* r8a7740 (R-Mobile A1) based Armadillo board
  - Enable backlight control in defconfig

* r8a7740 (R-Mobile A1) based Armadillo board
  - Rename ARCH_SHMOBILE to ARCH_SHMOBILE_LEGACY

* tag 'renesas-defconfig2-for-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: koelsch: Do not disable CONFIG_{INOTIFY_USER,UNIX} in defconfig
  ARM: shmobile: koelsch: Enable CONFIG_PACKET in defconfig
  ARM: shmobile: armadillo800eva: Enable backlight control in defconfig
  ARM: shmobile: Koelsch: enable Ether in defconfig
  ARM: shmobile: genmai: Rename ARCH_SHMOBILE to ARCH_SHMOBILE_LEGACY
  ARM: shmobile: lager: fixup I2C device on defconfig
  ARM: shmobile: lager: add gpio regulator support on defconfig
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'renesas-boards-for-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/boards

From Simon Horman:
Renesas ARM based SoC board updates for v3.14

* Global
  - Kconfig: Mention Renesas ARM SoCs instead of SH-Mobile

* r7s72100 SoC (RZ/A1H) based Genmai Board
  - Add Multiplatform support
  - Add Reference DT

* r8a7791 (R-Car M2) based Koelsch board
  - Add pinctrl_register_mappings() for Koelsch
  - Hook up SW30-SW36 on Koelsch
  - Mark GPIO keys as wake-up sources
  - Use ->init_late()
  - Add Multiplatform support
  - Set .debounce_interval for GPIO keys
  - Add SW2 to GPIO keys
  - Add Led 6, 7 and 8 support
  - Add reference DT
  - Enable PFC/GPIO

* r8a7790 (R-Car H2) based Lager board
  - Add gpio/fixed regulator for SDHI
  - Add SPI FLASH support on QSPI
  - Mark GPIO keys as wake-up sources
  - Use ->init_late()
  - Set .debounce_interval for GPIO keys

* r8a7778 (R-Car M1) based Bock-W board
  - bockw: remove unused RSND_SSI_CLK_FROM_ADG
  - Set .debounce_interval for GPIO keys
  - Correct FPGA ioremap area
  - Use regulator for MMCIF

* r8a7740 (R-Mobile A1) based Armadillo board
  - Correct FSI address size

* sh7374 (SH-Mobile AP4) based Mackerel board
  - Use pinconf API to configure pin pull-down
  - clk_round_rate() can return a zero to indicate an error

* tag 'renesas-boards-for-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas: (75 commits)
  ARM: shmobile: lager: add gpio/fixed regulator for SDHI
  ARM: shmobile: bockw: remove unused RSND_SSI_CLK_FROM_ADG
  ARM: shmobile: armadillo: fixup FSI address size
  ARM: Kconfig: Mention Renesas ARM SoCs instead of SH-Mobile
  ARM: shmobile: mackerel: Use pinconf API to configure pin pull-down
  ARM: shmobile: Lager:add SPI FLASH support on QSPI
  ARM: shmobile: mackerel: clk_round_rate() can return a zero to indicate an error
  ARM: shmobile: Add pinctrl_register_mappings() for Koelsch
  ARM: shmobile: Use ->init_late() on Lager
  ARM: shmobile: Hook up SW30-SW36 on Koelsch
  ARM: shmobile: koelsch: mark GPIO keys as wake-up sources
  ARM: shmobile: Use ->init_late() on Koelsch
  ARM: shmobile: lager: mark GPIO keys as wake-up sources
  ARM: shmobile: r7s72100 Genmai Multiplatform
  ARM: shmobile: r7s72100 Genmai DT reference C bits
  ARM: shmobile: r7s72100 Genmai DT reference DTS bits
  ARM: shmobile: Initial r8a7791 and Koelsch multiplatform support
  ARM: shmobile: koelsch: set .debounce_interval
  ARM: shmobile: lager: set .debounce_interval
  ARM: shmobile: bockw: add pin pull-up setting for SDHI
  ...
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'samsung-defconfig-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/boards

From Kukjin Kim:
Samsung defconfig 2nd update for v3.14
- enable REGULATOR S2MPS11 for Arndale Octa board

* tag 'samsung-defconfig-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: exynos_defconfig: Enable S2MPS11 voltage regulator
Signed-off-by: Olof Johansson <olof@lixom.net>

Need a newer base version to get a regulator fix for Samsung platforms that
they enable building in a defconfig.

Linux 3.13-rc5

Merge tag 'tegra-for-3.14-defconfig-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/boards

From Stephen Warren:
ARM: tegra: second set of defconfig changes

This branch contains changes to tegra_defconfig that came in after
I sent the previous pull-request/tag tegra-for-3.14-defconfig. We enable:

* DRM_PANEL/DRM_PANEL_SIMPLE, which implements the built-in LCD panel
  support for Harmony, Cardhu, and Dalmore.

This branch is based on tag tegra-for-3.14-defconfig, for which I sent a
previous pull request.

* tag 'tegra-for-3.14-defconfig-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  ARM: tegra: Enable DRM panel support
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'tegra-for-3.14-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/boards

From Stephen Warren:
ARM: tegra: defconfig changes

Enable new features required by the Venice2 board.

This branch is based on v3.13-rc1, and shouldn't cause any conflicts.

* tag 'tegra-for-3.14-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  ARM: tegra: tegra_defconfig updates
Signed-off-by: Olof Johansson <olof@lixom.net>

From Jason Cooper:
mvebu defconfig changes for v3.14 (incremental #2)

 - mvebu
    - enable nand support

* tag 'mvebu-defconfig-3.14-2' of git://git.infradead.org/linux-mvebu:
  ARM: mvebu: config: Enable NAND support
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'samsung-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/boards

From Kukjin Kim:
exynos_defconfig updates for v3.14
- increase number of CPU to 8 for EXYNOS SoCs

* tag 'samsung-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: exynos_defconfig: increase CONFIG_NR_CPUS value to 8
Signed-off-by: Olof Johansson <olof@lixom.net>

Pull ARM SoC fixes from Olof Johansson:
 "Much smaller batch of fixes this week.

  Biggest one is a revert of an OMAP display change that removed some
  non-DT pinmux code that was still needed for 3.13 to get DSI displays
  to work.

  There's also a fix that resolves some misdescribed GPIO controller
  resources on shmobile.  The rest are mostly smaller fixes, a couple of
  MAINTAINERS updates, etc"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  Revert "ARM: OMAP2+: Remove legacy mux code for display.c"
  MAINTAINERS: Add keystone clock drivers
  MAINTAINERS: Add keystone git tree information
  ARM: s3c64xx: dt: Fix boot failure due to double clock initialization
  ARM: shmobile: r8a7790: Fix GPIO resources in DTS
  irqchip: renesas-intc-irqpin: Fix register bitfield shift calculation
  ARM: shmobile: lager: phy fixup needs CONFIG_PHYLIB

Pull firewire fixlet from Stefan Richter:
 "A one-liner to reenable WRITE SAME over SBP-2 like in v3.8...v3.12.
  Buggy targets which could malfunction when being subjected to this
  command are already sufficiently protected by a scsi_level check in sd
  + SCSI core"

* tag 'firewire-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: sbp2: bring back WRITE SAME support

Pull SCSI target fixes from Nicholas Bellinger:
 "Mostly minor items this time around, the most notable being a FILEIO
  backend change to enforce hw_max_sectors based upon the current
  block_size to address a bug where large sized I/Os (> 1M) where being
  rejected"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  qla2xxx: Fix scsi_host leak on qlt_lport_register callback failure
  target: Remove extra percpu_ref_init
  target/file: Update hw_max_sectors based on current block_size
  iser-target: Move INIT_WORK setup into isert_create_device_ib_res
  iscsi-target: Fix incorrect np->np_thread NULL assignment
  qla2xxx: Fix schedule_delayed_work() for target timeout calculations
  iser-target: fix error return code in isert_create_device_ib_res()
  iscsi-target: Fix-up all zero data-length CDBs with R/W_BIT set
  target: Remove write-only stats fields and lock from struct se_node_acl
  iscsi-target: return -EINVAL on oversized configfs parameter

Pull AIO leak fixes from Ben LaHaise:
 "I've put these two patches plus Linus's change through a round of
  tests, and it passes millions of iterations of the aio numa
  migratepage test, as well as a number of repetitions of a few simple
  read and write tests.

  The first patch fixes the memory leak Kent introduced, while the
  second patch makes aio_migratepage() much more paranoid and robust"

* git://git.kvack.org/~bcrl/aio-next:
  aio/migratepages: make aio migrate pages sane
  aio: fix kioctx leak introduced by "aio: Fix a trinity splat"

Since commit 36bc08cc ("fs/aio: Add support to aio ring pages
migration") the aio ring setup code has used a special per-ring backing
inode for the page allocations, rather than just using random anonymous
pages.

However, rather than remembering the pages as it allocated them, it
would allocate the pages, insert them into the file mapping (dirty, so
that they couldn't be free'd), and then forget about them.  And then to
look them up again, it would mmap the mapping, and then use
"get_user_pages()" to get back an array of the pages we just created.

Now, not only is that incredibly inefficient, it also leaked all the
pages if the mmap failed (which could happen due to excessive number of
mappings, for example).

So clean it all up, making it much more straightforward.  Also remove
some left-overs of the previous (broken) mm_populate() usage that was
removed in commit d6c355c7 ("aio: fix race in ring buffer page
lookup introduced by page migration support") but left the pointless and
now misleading MAP_POPULATE flag around.
Tested-and-acked-by: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The arbitrary restriction on page counts offered by the core
migrate_page_move_mapping() code results in rather suspicious looking
fiddling with page reference counts in the aio_migratepage() operation.
To fix this, make migrate_page_move_mapping() take an extra_count parameter
that allows aio to tell the code about its own reference count on the page
being migrated.

While cleaning up aio_migratepage(), make it validate that the old page
being passed in is actually what aio_migratepage() expects to prevent
misbehaviour in the case of races.
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>

e34ecee2 reworked the percpu reference
counting to correct a bug trinity found.  Unfortunately, the change lead
to kioctxes being leaked because there was no final reference count to
put.  Add that reference count back in to fix things.
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Cc: stable@vger.kernel.org

Commit 1bf49dd4 ("./Makefile: export initial ramdisk compression
config option") started setting the INITRD_COMPRESS environment variable
depending on which decompression models the kernel had available.

That is completely broken.

For example, we by default have CONFIG_RD_LZ4 enabled, and are able to
decompress such an initrd, but the user tools to *create* such an initrd
may not be availble.  So trying to tell dracut to generate an
lz4-compressed image just because we can decode such an image is
completely inappropriate.

Cc: J P <ppandit@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull xfs bugfixes from Ben Myers:
 "This contains fixes for some asserts
   related to project quotas, a memory leak, a hang when disabling group or
   project quotas before disabling user quotas, Dave's email address, several
   fixes for the alignment of file allocation to stripe unit/width geometry, a
   fix for an assertion with xfs_zero_remaining_bytes, and the behavior of
   metadata writeback in the face of IO errors.

   Details:
   - fix memory leak in xfs_dir2_node_removename
   - fix quota assertion in xfs_setattr_size
   - fix quota assertions in xfs_qm_vop_create_dqattach
   - fix for hang when disabling group and project quotas before
     disabling user quotas
   - fix Dave Chinner's email address in MAINTAINERS
   - fix for file allocation alignment
   - fix for assertion in xfs_buf_stale by removing xfsbdstrat
   - fix for alignment with swalloc mount option
   - fix for "retry forever" semantics on IO errors"

* tag 'xfs-for-linus-v3.13-rc5' of git://oss.sgi.com/xfs/xfs:
  xfs: abort metadata writeback on permanent errors
  xfs: swalloc doesn't align allocations properly
  xfs: remove xfsbdstrat error
  xfs: align initial file allocations correctly
  MAINTAINERS: fix incorrect mail address of XFS maintainer
  xfs: fix infinite loop by detaching the group/project hints from user dquot
  xfs: fix assertion failure at xfs_setattr_nonsize
  xfs: fix false assertion at xfs_qm_vop_create_dqattach
  xfs: fix memory leak in xfs_dir2_node_removename

Commit 597d795a ('mm: do not allocate page->ptl dynamically, if
spinlock_t fits to long') restructures some allocators that are compiled
even if USE_SPLIT_PTLOCKS arn't used.  It results in compilation
failure:

  mm/memory.c:4282:6: error: 'struct page' has no member named 'ptl'
  mm/memory.c:4288:12: error: 'struct page' has no member named 'ptl'

Add in the missing ifdef.

Fixes: 597d795a ('mm: do not allocate page->ptl dynamically, if spinlock_t fits to long')
Signed-off-by: Olof Johansson <olof@lixom.net>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull ARC fix from Vineet Gupta:
 "Fix busted syscall table due to unistd header inclusion issue"

* tag 'arc-fixes-for-3.13-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: Allow conditional multiple inclusion of uapi/asm/unistd.h

Pull arm64 ptrace fix from Catalin Marinas.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: ptrace: avoid using HW_BREAKPOINT_EMPTY for disabled events

S2MPS11 voltage regulator is commonly used on the latest Exynos
boards like SMDK5420, Arndale-Octa, etc. Hence it makes sense to
enable it like S5M8767A voltage regulator.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

Some pstore backing devices use on board flash as persistent
storage. These have limited numbers of write cycles so it
is a poor idea to use them from high frequency operations.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge tag 'dmaengine-fixes-3.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine

Pull dmaengine fixes from Dan Williams:

 - deprecation of net_dma to be removed in 3.14

 - crash regression fix in pl330 from the dmaengine_unmap rework

 - crash regression fix for any channel running raid ops without
   CONFIG_ASYNC_TX_DMA from dmaengine_unmap

 - memory leak regression in mv_xor from dmaengine_unmap

 - build warning regressions in mv_xor, fsldma, ppc4xx, txx9, and
   at_hdmac from dmaengine_unmap

 - sleep in atomic regression in dma_async_memcpy_pg_to_pg

 - new fix in mv_xor for handling channel initialization failures

* tag 'dmaengine-fixes-3.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine:
  net_dma: mark broken
  dma: pl330: ensure DMA descriptors are zero-initialised
  dmaengine: fix sleep in atomic
  dmaengine: mv_xor: fix oops when channels fail to initialise
  dma: mv_xor: Use dmaengine_unmap_data for the self-tests
  dmaengine: fix enable for high order unmap pools
  dma: fix build warnings in txx9
  dmatest: fix build warning on mips
  dma: fix fsldma build warnings
  dma: fix build warnings in ppc4xx
  dmaengine: at_hdmac: remove unused function
  dma: mv_xor: remove mv_desc_get_dest_addr()

Pull KVM fixes from Paolo Bonzini:
 "The PPC folks had a large amount of changes queued for 3.13, and now
  they are fixing the bugs"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: PPC: Book3S HV: Don't drop low-order page address bits
  powerpc: book3s: kvm: Don't abuse host r2 in exit path
  powerpc/kvm/booke: Fix build break due to stack frame size warning
  KVM: PPC: Book3S: PR: Enable interrupts earlier
  KVM: PPC: Book3S: PR: Make svcpu -> vcpu store preempt savvy
  KVM: PPC: Book3S: PR: Export kvmppc_copy_to|from_svcpu
  KVM: PPC: Book3S: PR: Don't clobber our exit handler id
  powerpc: kvm: fix rare but potential deadlock scene
  KVM: PPC: Book3S HV: Take SRCU read lock around kvm_read_guest() call
  KVM: PPC: Book3S HV: Make tbacct_lock irq-safe
  KVM: PPC: Book3S HV: Refine barriers in guest entry/exit
  KVM: PPC: Book3S HV: Fix physical address calculations

In struct page we have enough space to fit long-size page->ptl there,
but we use dynamically-allocated page->ptl if size(spinlock_t) is larger
than sizeof(int).

It hurts 64-bit architectures with CONFIG_GENERIC_LOCKBREAK, where
sizeof(spinlock_t) == 8, but it easily fits into struct page.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Commit 81c0a2bb ("mm: page_alloc: fair zone allocator policy") meant
to bring aging fairness among zones in system, but it was overzealous
and badly regressed basic workloads on NUMA systems.

Due to the way kswapd and page allocator interacts, we still want to
make sure that all zones in any given node are used equally for all
allocations to maximize memory utilization and prevent thrashing on the
highest zone in the node.

While the same principle applies to NUMA nodes - memory utilization is
obviously improved by spreading allocations throughout all nodes -
remote references can be costly and so many workloads prefer locality
over memory utilization.  The original change assumed that
zone_reclaim_mode would be a good enough predictor for that, but it
turned out to be as indicative as a coin flip.

Revert the NUMA aspect of the fairness until we can find a proper way to
make it configurable and agree on a sane default.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: <stable@kernel.org> # 3.12
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This reverts commit 73f038b8.  The NUMA behaviour of this patch is
less than ideal.  An alternative approch is to interleave allocations
only within local zones which is implemented in the next patch.

Cc: stable@vger.kernel.org
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Sasha Levin found a NULL pointer dereference that is due to a missing
page table lock, which in turn is due to the pmd entry in question being
a transparent huge-table entry.

The code - introduced in commit 1998cc04 ("mm: make
madvise(MADV_WILLNEED) support swap file prefetch") - correctly checks
for this situation using pmd_none_or_trans_huge_or_clear_bad(), but it
turns out that that function doesn't work correctly.

pmd_none_or_trans_huge_or_clear_bad() expected that pmd_bad() would
trigger if the transparent hugepage bit was set, but it doesn't do that
if pmd_numa() is also set. Note that the NUMA bit only gets set on real
NUMA machines, so people trying to reproduce this on most normal
development systems would never actually trigger this.

Fix it by removing the very subtle (and subtly incorrect) expectation,
and instead just checking pmd_trans_huge() explicitly.
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
[ Additionally remove the now stale test for pmd_trans_huge() inside the
  pmd_bad() case - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>