We have found a BUG on res->migration_pending when migrating lock
resources.  The situation is as follows.

dlm_mark_lockres_migration
  res->migration_pending = 1;
  __dlm_lockres_reserve_ast
  dlm_lockres_release_ast returns with res->migration_pending remains
      because other threads reserve asts
  wait dlm_migration_can_proceed returns 1
  >>>>>>> o2hb found that target goes down and remove target
          from domain_map
  dlm_migration_can_proceed returns 1
  dlm_mark_lockres_migrating returns -ESHOTDOWN with
      res->migration_pending still remains.

When reentering dlm_mark_lockres_migrating(), it will trigger the BUG_ON
with res->migration_pending.  So clear migration_pending when target is
down.
Signed-off-by: NJiufei Xue <xuejiufei@huawei.com>
Reviewed-by: NJoseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

test_pages_in_a_zone() does not account for the possibility of missing
sections in the given pfn range.  pfn_valid_within always returns 1 when
CONFIG_HOLES_IN_ZONE is not set, allowing invalid pfns from missing
sections to pass the test, leading to a kernel oops.

Wrap an additional pfn loop with PAGES_PER_SECTION granularity to check
for missing sections before proceeding into the zone-check code.

This also prevents a crash from offlining memory devices with missing
sections.  Despite this, it may be a good idea to keep the related patch
'[PATCH 3/3] drivers: memory: prohibit offlining of memory blocks with
missing sections' because missing sections in a memory block may lead to
other problems not covered by the scope of this fix.
Signed-off-by: NAndrew Banman <abanman@sgi.com>
Acked-by: NAlex Thorlton <athorlton@sgi.com>
Cc: Russ Anderson <rja@sgi.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Greg KH <greg@kroah.com>
Cc: Seth Jennings <sjennings@variantweb.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commit 4f656367 ("Move locks API users to locks_lock_inode_wait()")
move flock/posix lock indentify code to locks_lock_inode_wait(), but
missed to set fl_flags to FL_FLOCK which caused the following kernel
panic on 4.4.0_rc5.

  kernel BUG at fs/locks.c:1895!
  invalid opcode: 0000 [#1] SMP
  Modules linked in: ocfs2(O) ocfs2_dlmfs(O) ocfs2_stack_o2cb(O) ocfs2_dlm(O) ocfs2_nodemanager(O) ocfs2_stackglue(O) iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi xen_kbdfront xen_netfront xen_fbfront xen_blkfront
  CPU: 0 PID: 20268 Comm: flock_unit_test Tainted: G           O    4.4.0-rc5-next-20151217 #1
  Hardware name: Xen HVM domU, BIOS 4.3.1OVM 05/14/2014
  task: ffff88007b3672c0 ti: ffff880028b58000 task.ti: ffff880028b58000
  RIP: locks_lock_inode_wait+0x2e/0x160
  Call Trace:
    ocfs2_do_flock+0x91/0x160 [ocfs2]
    ocfs2_flock+0x76/0xd0 [ocfs2]
    SyS_flock+0x10f/0x1a0
    entry_SYSCALL_64_fastpath+0x12/0x71
  Code: e5 41 57 41 56 49 89 fe 41 55 41 54 53 48 89 f3 48 81 ec 88 00 00 00 8b 46 40 83 e0 03 83 f8 01 0f 84 ad 00 00 00 83 f8 02 74 04 <0f> 0b eb fe 4c 8d ad 60 ff ff ff 4c 8d 7b 58 e8 0e 8e 73 00 4d
  RIP  locks_lock_inode_wait+0x2e/0x160
   RSP <ffff880028b5bce8>
  ---[ end trace dfca74ec9b5b274c ]---

Fixes: 4f656367 ("Move locks API users to locks_lock_inode_wait()")
Signed-off-by: NJunxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

m32r allmodconfig was failing with the error:

  error: implicit declaration of function 'read'

On checking io.h it turned out that 'read' is not defined but 'readb' is
defined and 'ioread8' will then obviously mean 'readb'.

At the same time some of the helper functions ioreadN_rep() and
iowriteN_rep() were missing which also led to the build failure.
Signed-off-by: NSudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

m32r allmodconfig is failing with:

  In file included from ../include/linux/kvm_para.h:4:0,
                   from ../kernel/watchdog.c:26:
  ../include/uapi/linux/kvm_para.h:30:26: fatal error: asm/kvm_para.h: No such file or directory

kvm_para.h was not included in the build.
Signed-off-by: NSudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix the build warning:

  arch/x86/xen/suspend.c: In function 'xen_arch_pre_suspend':
  arch/x86/xen/suspend.c:70:9: error: implicit declaration of function 'xen_pv_domain' [-Werror=implicit-function-declaration]
          if (xen_pv_domain())
              ^
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Memory cgroup reclaim can be interrupted with mem_cgroup_iter_break()
once enough pages have been reclaimed, in which case, in contrast to a
full round-trip over a cgroup sub-tree, the current position stored in
mem_cgroup_reclaim_iter of the target cgroup does not get invalidated
and so is left holding the reference to the last scanned cgroup.  If the
target cgroup does not get scanned again (we might have just reclaimed
the last page or all processes might exit and free their memory
voluntary), we will leak it, because there is nobody to put the
reference held by the iterator.

The problem is easy to reproduce by running the following command
sequence in a loop:

    mkdir /sys/fs/cgroup/memory/test
    echo 100M > /sys/fs/cgroup/memory/test/memory.limit_in_bytes
    echo $$ > /sys/fs/cgroup/memory/test/cgroup.procs
    memhog 150M
    echo $$ > /sys/fs/cgroup/memory/cgroup.procs
    rmdir test

The cgroups generated by it will never get freed.

This patch fixes this issue by making mem_cgroup_iter avoid taking
reference to the current position.  In order not to hit use-after-free
bug while running reclaim in parallel with cgroup deletion, we make use
of ->css_released cgroup callback to clear references to the dying
cgroup in all reclaim iterators that might refer to it.  This callback
is called right before scheduling rcu work which will free css, so if we
access iter->position from rcu read section, we might be sure it won't
go away under us.

[hannes@cmpxchg.org: clean up css ref handling]
Fixes: 5ac8fb31 ("mm: memcontrol: convert reclaim iterator to simple css refcounting")
Signed-off-by: NVladimir Davydov <vdavydov@virtuozzo.com>
Signed-off-by: NJohannes Weiner <hannes@cmpxchg.org>
Acked-by: NMichal Hocko <mhocko@kernel.org>
Acked-by: NJohannes Weiner <hannes@cmpxchg.org>
Cc: <stable@vger.kernel.org>	[3.19+]
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

When resizing, it firstly extends the last gd.  Once it should backup
super in the gd, it calculates new backup super and update the
corresponding value.

But it currently doesn't consider the situation that the backup super is
already done.  And in this case, it still sets the bit in gd bitmap and
then decrease from bg_free_bits_count, which leads to a corrupted gd and
trigger the BUG in ocfs2_block_group_set_bits:

    BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits);

So check whether the backup super is done and then do the updates.
Signed-off-by: NJoseph Qi <joseph.qi@huawei.com>
Reviewed-by: NJiufei Xue <xuejiufei@huawei.com>
Reviewed-by: NYiwen Jiang <jiangyiwen@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Pull crypto fix from Herbert Xu:
 "This fixes a bug in the algif_skcipher interface that can trigger a
  kernel WARN_ON from user-space.  It does so by using the new skcipher
  interface which unlike the previous ablkcipher does not need to create
  extra geniv objects which is what was used to trigger the WARN_ON"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: algif_skcipher - Use new skcipher interface

Pull key handling bugfix from James Morris:
 "Fix a race between keyctl_read() and keyctl_revoke()"

* 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  KEYS: Fix race between read and revoke

Pull MIPS fixes from Ralf Baechle:

 - Fix bitrot in __get_user_unaligned()
 - EVA userspace accessor bug fixes.
 - Fix for build issues with certain toolchains.
 - Fix build error for VDSO with particular toolchain versions.
 - Fix build error due to a variable that should have been removed by an
   earlier patch

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: Fix bitrot in __get_user_unaligned()
  MIPS: Fix build error due to unused variables.
  MIPS: VDSO: Fix build error
  MIPS: CPS: drop .set mips64r2 directives
  MIPS: uaccess: Take EVA into account in [__]clear_user
  MIPS: uaccess: Take EVA into account in __copy_from_user()
  MIPS: uaccess: Fix strlen_user with EVA

Pull ARM SoC fixes from Olof Johansson:
 "A smallish set of fixes that we've been sitting on for a while now,
  flushing the queue here so they go in.  Summary:

  A handful of fixes for OMAP, i.MX, Allwinner and Tegra:

   - A clock rate and a PHY setup fix for i.MX6Q/DL
   - A couple of fixes for the reduced serial bus (sunxi-rsb) on
     Allwinner
   - UART wakeirq fix for an OMAP4 board, timer config fixes for AM43XX.
   - Suspend fix for Tegra124 Chromebooks
   - Fix for missing implicit include that's different between
     ARM/ARM64"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: tegra: Fix suspend hang on Tegra124 Chromebooks
  bus: sunxi-rsb: Fix peripheral IC mapping runtime address
  bus: sunxi-rsb: Fix primary PMIC mapping hardware address
  ARM: dts: Fix UART wakeirq for omap4 duovero parlor
  ARM: OMAP2+: AM43xx: select ARM TWD timer
  ARM: OMAP2+: am43xx: enable GENERIC_CLOCKEVENTS_BROADCAST
  fsl-ifc: add missing include on ARM64
  ARM: dts: imx6: Fix Ethernet PHY mode on Ventana boards
  ARM: dts: imx: Fix the assigned-clock mismatch issue on imx6q/dl
  bus: sunxi-rsb: unlock on error in sunxi_rsb_read()
  ARM: dts: sunxi: sun6i-a31s-primo81.dts: add touchscreen axis swapping property

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Pull power management and ACPI fixes from Rafael Wysocki:
 "These fix an ACPI processor driver regression introduced during the
  4.3 cycle and a mistake in the recently added SCPI support in the
  arm_big_little cpufreq driver.

  Specifics:

   - Fix a thermal management issue introduced by an ACPI processor
     driver change made during the 4.3 development cycle that failed to
     return 0 from a function on success which triggered an error
     cleanup path every time it had been called that deleted useful data
     structures created previously (Srinivas Pandruvada).

   - Fix a variable data type issue in the arm_big_little cpufreq
     driver's SCPI support code added recently that prevents error
     handling in there from working correctly (Dan Carpenter)"

* tag 'pm+acpi-4.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: scpi-cpufreq: signedness bug in scpi_get_dvfs_info()
  ACPI / processor: Fix thermal cooling device regression

Pull md bugfix from Neil Brown:
 "One more md fix for 4.4-rc

  Fix a regression which causes reshape to not start properly sometimes"

* tag 'md/4.4-rc6-fix' of git://neil.brown.name/md:
  md: remove check for MD_RECOVERY_NEEDED in action_store.

Pull UBI bug fixes from Richard Weinberger:
 "This contains four bug fixes for UBI"

* tag 'upstream-4.4-rc7' of git://git.infradead.org/linux-ubifs:
  mtd: ubi: don't leak e if schedule_erase() fails
  mtd: ubi: fixup error correction in do_sync_erase()
  UBI: fix use of "VID" vs. "EC" in header self-check
  UBI: fix return error code

Pull ftrace/recordmcount fix from Steven Rostedt:
 "Russell King was reporting lots of warnings when he compiled his
  kernel with ftrace enabled.  With some investigation it was discovered
  that it was his compile setup.  He was using ccache with hard links,
  which allowed recordmcount to process the same .o twice.  When this
  happens, recordmcount will detect that it was already done and give a
  warning about it.

  Russell fixed this by having recordmcount detect that the object file
  has more than one hard link, and if it does, it unlinks the object
  file after it maps it and processes then.  This appears to fix the
  issue.

  As you did not like the fact that recordmcount modified the file in
  place and thought that it should do the modifications in memory and
  then write it out to disk and move it over the old file to prevent
  other more subtle issues like the one above, a second patch is added
  on top of Russell's to do just that.  Luckily the original code had
  write and lseek wrappers that I was able to modify to not do inplace
  writes, but simply keep track of the changes made in memory.  When a
  write is made, a "update" flag is set, and at the end of processing,
  if the update is set, then it writes the file with changes out to a
  new file, and then renames it over the original one.

  The file descriptor is still passed to the write and lseek wrappers
  because removing that would cause the change to be more intrusive.
  That can be removed in a follow up cleanup patch that can wait till
  the next merge window"

* tag 'trace-v4.4-rc4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftrace/scripts: Have recordmcount copy the object file
  scripts: recordmcount: break hardlinks

Pull ARC fixes from Vineet Gupta:
 "Sorry for this late pull request, but these are all important fixes
  for code introduced/updated in this release which we will otherwise
  end up back porting.

   - Unwinder rework (A revert followed by better fix)
   - Build errors: MMUv2, modules with -Os
   - highmem section mismatch build splat"

* tag 'arc-4.4-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: dw2 unwind: Catch Dwarf SNAFUs early
  ARC: dw2 unwind: Don't bail for CIE.version != 1
  Revert "ARC: dw2 unwind: Ignore CIE version !=1 gracefully instead of bailing"
  ARC: Fix linking errors with CONFIG_MODULE + CONFIG_CC_OPTIMIZE_FOR_SIZE
  ARC: mm: fix building for MMU v2
  ARC: mm: HIGHMEM: Fix section mismatch splat

* acpi-processor:
  ACPI / processor: Fix thermal cooling device regression

* pm-cpufreq:
  cpufreq: scpi-cpufreq: signedness bug in scpi_get_dvfs_info()

Pull parisc system call restart fix from Helge Deller:
 "The architectural design of parisc always uses two instructions to
  call kernel syscalls (delayed branch feature).  This means that the
  instruction following the branch (located in the delay slot of the
  branch instruction) is executed before control passes to the branch
  destination.

  Depending on which assembler instruction and how it is used in
  usersapce in the delay slot, this sometimes made restarted syscalls
  like futex() and poll() failing with -ENOSYS"

* 'parisc-4.4-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix syscall restarts

Pull sparc fixes from David Miller:

 1) Finally make perf stack backtraces stable on sparc, several problems
    (mostly due to the context in which the user copies from the stack
    are done) contributed to this.

    From Rob Gardner.

 2) Export ADI capability if the cpu supports it.

 3) Hook up userfaultfd system call.

 4) When faults happen during user copies we really have to clean up and
    restore the FPU state fully.  Also from Rob Gardner

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  tty/serial: Skip 'NULL' char after console break when sysrq enabled
  sparc64: fix FP corruption in user copy functions
  sparc64: Perf should save/restore fault info
  sparc64: Ensure perf can access user stacks
  sparc64: Don't set %pil in rtrap_nmi too early
  sparc64: Add ADI capability to cpu capabilities
  tty: serial: constify sunhv_ops structs
  sparc: Hook up userfaultfd system call

When sysrq is triggered from console, serial driver for SUN hypervisor
console receives a console break and enables the sysrq. It expects a valid
sysrq char following with break. Meanwhile if driver receives 'NULL'
ASCII char then it disables sysrq and sysrq handler will never be invoked.

This fix skips calling uart sysrq handler when 'NULL' is received while
sysrq is enabled.
Signed-off-by: NVijay Kumar <vijay.ac.kumar@oracle.com>
Acked-by: NKarl Volz <karl.volz@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Short story: Exception handlers used by some copy_to_user() and
copy_from_user() functions do not diligently clean up floating point
register usage, and this can result in a user process seeing invalid
values in floating point registers. This sometimes makes the process
fail.

Long story: Several cpu-specific (NG4, NG2, U1, U3) memcpy functions
use floating point registers and VIS alignaddr/faligndata to
accelerate data copying when source and dest addresses don't align
well. Linux uses a lazy scheme for saving floating point registers; It
is not done upon entering the kernel since it's a very expensive
operation. Rather, it is done only when needed. If the kernel ends up
not using FP regs during the course of some trap or system call, then
it can return to user space without saving or restoring them.

The various memcpy functions begin their FP code with VISEntry (or a
variation thereof), which saves the FP regs. They conclude their FP
code with VISExit (or a variation) which essentially marks the FP regs
"clean", ie, they contain no unsaved values. fprs.FPRS_FEF is turned
off so that a lazy restore will be triggered when/if the user process
accesses floating point regs again.

The bug is that the user copy variants of memcpy, copy_from_user() and
copy_to_user(), employ an exception handling mechanism to detect faults
when accessing user space addresses, and when this handler is invoked,
an immediate return from the function is forced, and VISExit is not
executed, thus leaving the fprs register in an indeterminate state,
but often with fprs.FPRS_FEF set and one or more dirty bits. This
results in a return to user space with invalid values in the FP regs,
and since fprs.FPRS_FEF is on, no lazy restore occurs.

This bug affects copy_to_user() and copy_from_user() for NG4, NG2,
U3, and U1. All are fixed by using a new exception handler for those
loads and stores that are done during the time between VISEnter and
VISExit.

n.b. In NG4memcpy, the problematic code can be triggered by a copy
size greater than 128 bytes and an unaligned source address.  This bug
is known to be the cause of random user process memory corruptions
while perf is running with the callgraph option (ie, perf record -g).
This occurs because perf uses copy_from_user() to read user stacks,
and may fault when it follows a stack frame pointer off to an
invalid page. Validation checks on the stack address just obscure
the underlying problem.
Signed-off-by: NRob Gardner <rob.gardner@oracle.com>
Signed-off-by: NDave Aldridge <david.j.aldridge@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There have been several reports of random processes being killed with
a bus error or segfault during userspace stack walking in perf.  One
of the root causes of this problem is an asynchronous modification to
thread_info fault_address and fault_code, which stems from a perf
counter interrupt arriving during kernel processing of a "benign"
fault, such as a TSB miss. Since perf_callchain_user() invokes
copy_from_user() to read user stacks, a fault is not only possible,
but probable. Validity checks on the stack address merely cover up the
problem and reduce its frequency.

The solution here is to save and restore fault_address and fault_code
in perf_callchain_user() so that the benign fault handler is not
disturbed by a perf interrupt.
Signed-off-by: NRob Gardner <rob.gardner@oracle.com>
Signed-off-by: NDave Aldridge <david.j.aldridge@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When an interrupt (such as a perf counter interrupt) is delivered
while executing in user space, the trap entry code puts ASI_AIUS in
%asi so that copy_from_user() and copy_to_user() will access the
correct memory. But if a perf counter interrupt is delivered while the
cpu is already executing in kernel space, then the trap entry code
will put ASI_P in %asi, and this will prevent copy_from_user() from
reading any useful stack data in either of the perf_callchain_user_X
functions, and thus no user callgraph data will be collected for this
sample period. An additional problem is that a fault is guaranteed
to occur, and though it will be silently covered up, it wastes time
and could perturb state.

In perf_callchain_user(), we ensure that %asi contains ASI_AIUS
because we know for a fact that the subsequent calls to
copy_from_user() are intended to read the user's stack.

[ Use get_fs()/set_fs() -DaveM ]
Signed-off-by: NRob Gardner <rob.gardner@oracle.com>
Signed-off-by: NDave Aldridge <david.j.aldridge@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit 28a1f533 delays setting %pil to avoid potential
hardirq stack overflow in the common rtrap_irq path.
Setting %pil also needs to be delayed in the rtrap_nmi
path for the same reason.
Signed-off-by: NRob Gardner <rob.gardner@oracle.com>
Signed-off-by: NDave Aldridge <david.j.aldridge@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add ADI (Application Data Integrity) capability to cpu capabilities list.
ADI capability allows virtual addresses to be encoded with a tag in
bits 63-60. This tag serves as an access control key for the regions
of virtual address with ADI enabled and a key set on them. Hypervisor
encodes this capability as "adp" in "hwcap-list" property in machine
description.
Signed-off-by: NKhalid Aziz <khalid.aziz@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Constifies sunhv_ops structures in tty's serial
driver since they are not modified after their
initialization.

Detected and found using Coccinelle.
Suggested-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NAya Mahfouz <mahfouz.saif.elyazal@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The "domain" variable needs to be signed for the error handling to work.

Fixes: 8def3103 (cpufreq: arm_big_little: add SCPI interface driver)
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Acked-by: NSudeep Holla <sudeep.holla@arm.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

After hooking up system call, userfaultfd selftest was successful for
both 32 and 64 bit version of test.
Signed-off-by: NMike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Pull sound fixes from Takashi Iwai:
 "This shouldn't be a nightmare before Christmas: just a handful small
  device-specific fixes for various ASoC and HD-audio drivers.  Most of
  them are stable fixes"

* tag 'sound-4.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek - Fix silent headphone output on MacPro 4,1 (v2)
  ASoC: fsl_sai: fix no frame clk in master mode
  ALSA: hda - Set SKL+ hda controller power at freeze() and thaw()
  ASoC: sgtl5000: fix VAG power up timing
  ASoC: rockchip: spdif: Set transmit data level to 16 samples
  ASoC: wm8974: set cache type for regmap
  ASoC: es8328: Fix shifts for mixer switches
  ASoC: davinci-mcasp: Fix XDATA check in mcasp_start_tx
  ASoC: es8328: Fix deemphasis values

Pull i915 drm fixes from Jani Nikula:
 "Here's a batch of i915 fixes all around.  It may be slightly bigger
  than one would hope for at this stage, but they've all been through
  testing in our -next before being picked up for v4.4.  Also, I missed
  Dave's fixes pull earlier today just because I wanted an extra testing
  round on this.  So I'm fairly confident.

  Wishing you all the things it is customary to wish this time of the
  year"

* tag 'drm-intel-fixes-2015-12-23' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Correct max delay for HDMI hotplug live status checking
  drm/i915: mdelay(10) considered harmful
  drm/i915: Kill intel_crtc->cursor_bo
  drm/i915: Workaround CHV pipe C cursor fail
  drm/i915: Only spin whilst waiting on the current request
  drm/i915: Limit the busy wait on requests to 5us not 10ms!
  drm/i915: Break busywaiting for requests on pending signals
  drm/i915: Disable primary plane if we fail to reconstruct BIOS fb (v2)
  drm/i915: Set the map-and-fenceable flag for preallocated objects
  drm/i915: Drop the broken cursor base==0 special casing

Pull drm fixes from Dave Airlie:
 "Not much happening, should have dequeued this lot earlier.

  One amdgpu, one nouveau and one exynos fix"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/exynos: atomic check only enabled crtc states
  drm/nouveau/bios/fan: hardcode the fan mode to linear
  drm/amdgpu: fix user fence handling

Merge tag 'asoc-fix-v4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v4.4

A collection of small driver specific fixes here, nothing that'll affect
users who don't have the devices concerned.  At least the wm8974 bug
indicates that there's not too many users of some of these devices.

Merge remote-tracking branches 'asoc/fix/davinci', 'asoc/fix/es8328', 'asoc/fix/fsl-sai', 'asoc/fix/rockchip', 'asoc/fix/sgtl5000' and 'asoc/fix/wm8974' into asoc-linus

Pull block layer fixes from Jens Axboe:
 "Three small fixes for 4.4 final. Specifically:

   - The segment issue fix from Junichi, where the old IO path does a
     bio limit split before potentially bouncing the pages.  We need to
     do that in the right order, to ensure that limitations are met.

   - A NVMe surprise removal IO hang fix from Keith.

   - A use-after-free in null_blk, introduced by a previous patch in
     this series.  From Mike Krinkin"

* 'for-linus' of git://git.kernel.dk/linux-block:
  null_blk: fix use-after-free error
  block: ensure to split after potentially bouncing a bio
  NVMe: IO ending fixes on surprise removal

Pull nfsd fix from Bruce Fields:
 "Just one fix for a NFSv4 callback bug introduced in 4.4"

* tag 'nfsd-4.4-1' of git://linux-nfs.org/~bfields/linux:
  nfsd: don't hold ls_mutex across a layout recall

Pull kvm fixes from Paolo Bonzini:

 - A series of fixes to the MTRR emulation, tested in the BZ by several
   users so they should be safe this late

 - A fix for a division by zero

 - Two very simple ARM and PPC fixes

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Reload pit counters for all channels when restoring state
  KVM: MTRR: treat memory as writeback if MTRR is disabled in guest CPUID
  KVM: MTRR: observe maxphyaddr from guest CPUID, not host
  KVM: MTRR: fix fixed MTRR segment look up
  KVM: VMX: Fix host initiated access to guest MSR_TSC_AUX
  KVM: arm/arm64: vgic: Fix kvm_vgic_map_is_active's dist check
  kvm: x86: move tracepoints outside extended quiescent state
  KVM: PPC: Book3S HV: Prohibit setting illegal transaction state in MSR

Pull s390 fixes from Martin Schwidefsky:
 "Two late bug fixes for kernel 4.4.

  Merry Christmas"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/dis: Fix handling of format specifiers
  s390/zcrypt: Fix AP queue handling if queue is full