Pull x86 CPU cacheinfo changes from Borislav Petkov:

   "Convert x86 cacheinfo code to the generic sysfs cacheinfo infrastructure. (Sudeep Holla)"
Signed-off-by: Ingo Molnar <mingo@kernel.org>

This patch removes the redundant sysfs cacheinfo code by reusing
the newly introduced generic cacheinfo infrastructure through the
commit

  246246cb ("drivers: base: support cpu cache information
		 interface to userspace via sysfs")

The private pointer provided by the cacheinfo is used to implement
the AMD L3 cache-specific attributes.

Note that with v4.0-rc1, commit

  513e3d2d ("cpumask: always use nr_cpu_ids in formatting and parsing
		 functions")

in particular changes from long format to shorter one for all cpumasks
sysfs entries. As the consequence of the same, even the shared_cpu_map
in the cacheinfo sysfs was also changed.

This patch neither alters any existing sysfs entries nor their
formating, however since the generic cacheinfo has switched to use the
device attributes instead of the traditional raw kobjects, a directory
named "power" along with its standard attributes are added similar to
any other device.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Link: http://lkml.kernel.org/r/1425470416-20691-1-git-send-email-sudeep.holla@arm.com
[ Add a check for uninitialized this_cpu_ci for the cpu_has_topoext case too
  in __cache_amd_cpumap_setup() ]
Signed-off-by: Borislav Petkov <bp@suse.de>

Pull i2c fixes from Wolfram Sang:
 "A set of updates and bugfixes for the new designware-baytrail driver.

  And a documentation bugfix"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: imx: add required clocks property to binding
  i2c: designware-baytrail: baytrail_i2c_acquire() might sleep
  i2c: designware-baytrail: cross-check lock functions
  i2c: designware-baytrail: fix sparse warnings
  i2c: designware-baytrail: fix typo in error path
  i2c: designware-baytrail: describe magic numbers

Pull slave-dmaengine fixes from Vinod Koul:
 "This contains small fixes spread across the drivers"

* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: mmp_pdma: fix warning about slave caps
  dmaengine: qcom_bam_dma: fix wrong register offsets
  dmaengine: bam-dma: fix a warning about missing capabilities
  dmaengine: ioatdma: workaround for incorrect DMACAP register
  dmaengine: at_xdmac: fix for chan conf simplification
  dmaengine: dw: don't handle interrupt when dmaengine is not used
  dma: mmp-tdma: refine dma disable and dma-pos update
  dmaengine: shdma: Move DMA stop to (runtime) suspend callbacks
  dmaenegine: mmp-pdma: fix irq handler overwrite physical chan issue

Pull arm64 fixes from Catalin Marinas:
 "arm64 and generic kernel/module.c (acked by Rusty) fixes for
  CONFIG_DEBUG_SET_MODULE_RONX"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  kernel/module.c: Update debug alignment after symtable generation
  arm64: Don't use is_module_addr in setting page attributes

Pull drm fixes from Dave Airlie:
 "Radeon, imx, msm, and i915 fixes.

  The msm, imx and i915 ones are fairly run of the mill.

  Radeon had some DP audio and posting reads for irq fixes, along with a
  fix for 32-bit kernels with new cards, we were using unsigned long to
  represent GPU side memory space, but since that changed size on 32 vs
  64 cards with lots of VRAM failed, so the change has no effect on
  x86-64, just moves to using uint64_t instead"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (35 commits)
  drm/msm: kexec fixes
  drm/msm/mdp5: fix cursor blending
  drm/msm/mdp5: fix cursor ROI
  drm/msm/atomic: Don't leak atomic commit object when commit fails
  drm/msm/mdp5: Avoid flushing registers when CRTC is disabled
  drm/msm: update generated headers (add 6th lm.base entry)
  drm/msm/mdp5: fixup "drm/msm: fix fallout of atomic dpms changes"
  drm/ttm: device address space != CPU address space
  drm/mm: Support 4 GiB and larger ranges
  drm/i915: gen4: work around hang during hibernation
  drm/i915: Check for driver readyness before handling an underrun interrupt
  drm/radeon: fix interlaced modes on DCE8
  drm/radeon: fix DRM_IOCTL_RADEON_CS oops
  drm/radeon: do a posting read in cik_set_irq
  drm/radeon: do a posting read in si_set_irq
  drm/radeon: do a posting read in evergreen_set_irq
  drm/radeon: do a posting read in r600_set_irq
  drm/radeon: do a posting read in rs600_set_irq
  drm/radeon: do a posting read in r100_set_irq
  radeon/audio: fix DP audio on DCE6
  ...

A clock specifier is required for i.MX I2C and is
provided in all DTS implementations. Add this to the
list of required properties in the binding.
Signed-off-by: Matt Porter <mporter@konsulko.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

This patch marks baytrail_i2c_acquire() that it might sleep. Also it chages
while-loop to do-while and, though it is matter of taste, gives a chance to
check one more time before report a timeout.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

It seems the idea behind the cross-check is to prevent acquire semaphore when
there is no release callback and vice versa. Thus, patch fixes a typo.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

There is no need to export functions that are used as the callbacks in the
struct dw_i2c_dev. Otherwise we get the following warnings:

drivers/i2c/busses/i2c-designware-baytrail.c:63:5: warning: symbol 'baytrail_i2c_acquire' was not declared. Should it be static?
drivers/i2c/busses/i2c-designware-baytrail.c:114:6: warning: symbol 'baytrail_i2c_release' was not declared. Should it be static?

While here, do few indentation fixes, remove i2c_dw_eval_lock_support() from
functions exported to the modules and redundant assignment of local sem
variable.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

It seems we have same message for different return values in get_sem() and
baytrail_i2c_acquire(). I suspect this is just a typo, so this patch fixes it.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

The patch converts hardcoded numerical constants to a named ones.

While here, align the variable name in get_sem() and reset_semaphore().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

Pull btrfs fixes from Chris Mason:
 "Outside of misc fixes, Filipe has a few fsync corners and we're
  pulling in one more of Josef's fixes from production use here"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs:__add_inode_ref: out of bounds memory read when looking for extended ref.
  Btrfs: fix data loss in the fast fsync path
  Btrfs: remove extra run_delayed_refs in update_cowonly_root
  Btrfs: incremental send, don't rename a directory too soon
  btrfs: fix lost return value due to variable shadowing
  Btrfs: do not ignore errors from btrfs_lookup_xattr in do_setxattr
  Btrfs: fix off-by-one logic error in btrfs_realloc_node
  Btrfs: add missing inode update when punching hole
  Btrfs: abort the transaction if we fail to update the free space cache inode
  Btrfs: fix fsync race leading to ordered extent memory leaks

Pull livepatching fix from Jiri Kosina:
 "Fix an RCU unlock misplacement in live patching infrastructure, from
  Peter Zijlstra"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
  livepatch: fix RCU usage in klp_find_external_symbol()

Pull thermal management fixes from Eduardo Valentin:
 "Specifics:

   - adding Lukasz as maintainer of samsung thermal driver.
   - driver fixes: exynos and int430x.
   - one fix in the exynos cpufreq driver related to cpu cooling (acked
     by cpufreq maintainer).
   - fix default sysfs attributes of cooling devices

  Note: I am sending this pull on Rui's behalf while he fixes issues in his Linux box"

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
  thermal: Make sysfs attributes of cooling devices default attributes
  Thermal/int340x: Fix memleak for aux trip
  MAINTAINERS: Add entry for SAMSUNG THERMAL DRIVER
  cpufreq: exynos: Use simple approach to asses if cpu cooling can be used
  thermal: exynos: Fix wrong control of power down detection mode for Exynos7

two fixes, both cc'd stable.

* tag 'drm-intel-fixes-2015-03-05' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: gen4: work around hang during hibernation
  drm/i915: Check for driver readyness before handling an underrun interrupt

Linux 4.0-rc2

Merging this manually as the i915 change is in it,
and intel fixes are on top of this

Pull sound fixes from Takashi Iwai:
 "Here are a few more ASoC changes that have been gathered since rc1,
  but it's still fairly calm over all.  The only largish LOC is found in
  atmel driver, and it's just a removal of broken non-DT stuff.  The
  rest are all small driver-specific fixes, nothing to worry much"

* tag 'sound-4.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (26 commits)
  ALSA: hda - One more Dell macine needs DELL1_MIC_NO_PRESENCE quirk
  ALSA: opl3: small array underflow
  ALSA: line6: Clamp values correctly
  ALSA: msnd: add some missing curly braces
  ASoC: omap-pcm: Correct dma mask
  ASoC: simple-card: Add a NULL pointer check in asoc_simple_card_dai_link_of
  ASoC: sam9g20_wm8731: drop machine_is_xxx
  ALSA: dice: fix wrong offsets for Dice interface
  ALSA: oxfw: fix a condition and return code in start_stream()
  ASoC: OMAP: mcbsp: Fix CLKX and CLKR pinmux when used as inputs
  ASoC: rt5677: Correct the routing paths of that after IF1/2 DACx Mux
  ASoC: sta32x: fix register range in regmap.
  ASoC: rt5670: Set RT5670_IRQ_CTRL1 non volatile
  ASoC: Intel: reset the DSP while suspending
  ASoC: Intel: save and restore the CSR register
  ASoC: Intel: update MMX ID to 3
  ASoC: max98357a: Add missing header files
  ASoC: cirrus: tlv320aic23 needs I2C
  ASoC: Samsung: add missing I2C/SPI dependencies
  ASoC: rt5670: Fix the speaker mono output issue
  ...

Pull power management and ACPI fixes from Rafael Wysocki:
 "These are fixes for recent regressions (ACPI resources management,
  suspend-to-idle), stable-candidate fixes (ACPI backlight), fixes
  related to the wakeup IRQ management changes made in v3.18, other
  fixes (suspend-to-idle, cpufreq ppc driver) and a couple of cleanups
  (suspend-to-idle, generic power domains, ACPI backlight).

  Specifics:

   - Fix ACPI resources management problems introduced by the recent
     rework of the code in question (Jiang Liu) and a build issue
     introduced by those changes (Joachim Nilsson).

   - Fix a recent suspend-to-idle regression on systems where entering
     idle states causes local timers to stop, prevent suspend-to-idle
     from crashing in restricted configurations (no cpuidle driver,
     cpuidle disabled etc.) and clean up the idle loop somewhat while at
     it (Rafael J Wysocki).

   - Fix build problem in the cpufreq ppc driver (Geert Uytterhoeven).

   - Allow the ACPI backlight driver module to be loaded if ACPI is
     disabled which helps the i915 driver in those configurations
     (stable-candidate) and change the code to help debug unusual use
     cases (Chris Wilson).

   - Wakeup IRQ management changes in v3.18 caused some drivers on the
     at91 platform to trigger a warning from the IRQ core related to an
     unexpected combination of interrupt action handler flags.  However,
     on at91 a timer IRQ is shared with some other devices (including
     system wakeup ones) and that leads to the unusual combination of
     flags in question.

     To make it possible to avoid the warning introduce a new interrupt
     action handler flag (which can be used by drivers to indicate the
     special case to the core) and rework the problematic at91 drivers
     to use it and work as expected during system suspend/resume.  From
     Boris Brezillon, Rafael J Wysocki and Mark Rutland.

   - Clean up the generic power domains subsystem's debugfs interface
     (Kevin Hilman)"

* tag 'pm+acpi-4.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  genirq / PM: describe IRQF_COND_SUSPEND
  tty: serial: atmel: rework interrupt and wakeup handling
  watchdog: at91sam9: request the irq with IRQF_NO_SUSPEND
  cpuidle / sleep: Use broadcast timer for states that stop local timer
  clk: at91: implement suspend/resume for the PMC irqchip
  rtc: at91rm9200: rework wakeup and interrupt handling
  rtc: at91sam9: rework wakeup and interrupt handling
  PM / wakeup: export pm_system_wakeup symbol
  genirq / PM: Add flag for shared NO_SUSPEND interrupt lines
  ACPI / video: Propagate the error code for acpi_video_register
  ACPI / video: Load the module even if ACPI is disabled
  PM / Domains: cleanup: rename gpd -> genpd in debugfs interface
  cpufreq: ppc: Add missing #include <asm/smp.h>
  x86/PCI/ACPI: Relax ACPI resource descriptor checks to work around BIOS bugs
  x86/PCI/ACPI: Ignore resources consumed by host bridge itself
  cpuidle: Clean up fallback handling in cpuidle_idle_call()
  cpuidle / sleep: Do sanity checks in cpuidle_enter_freeze() too
  idle / sleep: Avoid excessive disabling and enabling interrupts
  PCI: versatile: Update for list_for_each_entry() API change
  genirq / PM: better describe IRQF_NO_SUSPEND semantics

Pull file locking fix from Jeff Layton:
 "Just a single patch to fix a memory leak that Daniel Wagner discovered
  while doing some testing with leases"

* tag 'locks-v4.0-3' of git://git.samba.org/jlayton/linux:
  locks: fix fasync_struct memory leak in lease upgrade/downgrade handling

Pull NFS client bugfixes from Trond Myklebust:
 "Highlights include:

   - Fix a regression in the NFSv4 open state recovery code
   - Fix a regression in the NFSv4 close code
   - Fix regressions and side-effects of the loop-back mounted NFS fixes
     in 3.18, that cause the NFS read() syscall to return EBUSY.
   - Fix regressions around the readdirplus code and how it interacts
     with the VFS lazy unmount changes that went into v3.18.
   - Fix issues with out-of-order RPC call replies replacing updated
     attributes with stale ones (particularly after a truncate()).
   - Fix an underflow checking issue with RPC/RDMA credits
   - Fix a number of issues with the NFSv4 delegation return/free code.
   - Fix issues around stale NFSv4.1 leases when doing a mount"

* tag 'nfs-for-4.0-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (24 commits)
  NFSv4.1: Clear the old state by our client id before establishing a new lease
  NFSv4: Fix a race in NFSv4.1 server trunking discovery
  NFS: Don't write enable new pages while an invalidation is proceeding
  NFS: Fix a regression in the read() syscall
  NFSv4: Ensure we skip delegations that are already being returned
  NFSv4: Pin the superblock while we're returning the delegation
  NFSv4: Ensure we honour NFS_DELEGATION_RETURNING in nfs_inode_set_delegation()
  NFSv4: Ensure that we don't reap a delegation that is being returned
  NFS: Fix stateid used for NFS v4 closes
  NFSv4: Don't call put_rpccred() under the rcu_read_lock()
  NFS: Don't require a filehandle to refresh the inode in nfs_prime_dcache()
  NFSv3: Use the readdir fileid as the mounted-on-fileid
  NFS: Don't invalidate a submounted dentry in nfs_prime_dcache()
  NFSv4: Set a barrier in the update_changeattr() helper
  NFS: Fix nfs_post_op_update_inode() to set an attribute barrier
  NFS: Remove size hack in nfs_inode_attrs_need_update()
  NFSv4: Add attribute update barriers to delegreturn and pNFS layoutcommit
  NFS: Add attribute update barriers to NFS writebacks
  NFS: Set an attribute barrier on all updates
  NFS: Add attribute update barriers to nfs_setattr_update_inode()
  ...

Merge tag 'asoc-fix-v4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v4.0

A few driver specific fixes here, none of them earth shattering in
themselves, that have accumliated since the opening of the merge window.

Cc: <stable@vger.kernel.org>
BugLink: https://bugs.launchpad.net/bugs/1428947Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

There is a missing lower bound check on "pitchbend" so it means we can
read up to 6 elements before the start of the opl3_note_table[] array.

Thanks to Clemens Ladisch for his help with this patch.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

When CONFIG_DEBUG_SET_MODULE_RONX is enabled, the sizes of
module sections are aligned up so appropriate permissions can
be applied. Adjusting for the symbol table may cause them to
become unaligned. Make sure to re-align the sizes afterward.
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

The set_memory_* functions currently only support module
addresses. The addresses are validated using is_module_addr.
That function is special though and relies on internal state
in the module subsystem to work properly. At the time of
module initialization and calling set_memory_*, it's too early
for is_module_addr to work properly so it always returns
false. Rather than be subject to the whims of the module state,
just bounds check against the module virtual address range.
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Improper arithmetics when calculting the address of the extended ref could
lead to an out of bounds memory read and kernel panic.
Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
cc: stable@vger.kernel.org # v3.7+
Signed-off-by: Chris Mason <clm@fb.com>

When using the fast file fsync code path we can miss the fact that new
writes happened since the last file fsync and therefore return without
waiting for the IO to finish and write the new extents to the fsync log.

Here's an example scenario where the fsync will miss the fact that new
file data exists that wasn't yet durably persisted:

1. fs_info->last_trans_committed == N - 1 and current transaction is
   transaction N (fs_info->generation == N);

2. do a buffered write;

3. fsync our inode, this clears our inode's full sync flag, starts
   an ordered extent and waits for it to complete - when it completes
   at btrfs_finish_ordered_io(), the inode's last_trans is set to the
   value N (via btrfs_update_inode_fallback -> btrfs_update_inode ->
   btrfs_set_inode_last_trans);

4. transaction N is committed, so fs_info->last_trans_committed is now
   set to the value N and fs_info->generation remains with the value N;

5. do another buffered write, when this happens btrfs_file_write_iter
   sets our inode's last_trans to the value N + 1 (that is
   fs_info->generation + 1 == N + 1);

6. transaction N + 1 is started and fs_info->generation now has the
   value N + 1;

7. transaction N + 1 is committed, so fs_info->last_trans_committed
   is set to the value N + 1;

8. fsync our inode - because it doesn't have the full sync flag set,
   we only start the ordered extent, we don't wait for it to complete
   (only in a later phase) therefore its last_trans field has the
   value N + 1 set previously by btrfs_file_write_iter(), and so we
   have:

       inode->last_trans <= fs_info->last_trans_committed
           (N + 1)              (N + 1)

   Which made us not log the last buffered write and exit the fsync
   handler immediately, returning success (0) to user space and resulting
   in data loss after a crash.

This can actually be triggered deterministically and the following excerpt
from a testcase I made for xfstests triggers the issue. It moves a dummy
file across directories and then fsyncs the old parent directory - this
is just to trigger a transaction commit, so moving files around isn't
directly related to the issue but it was chosen because running 'sync' for
example does more than just committing the current transaction, as it
flushes/waits for all file data to be persisted. The issue can also happen
at random periods, since the transaction kthread periodicaly commits the
current transaction (about every 30 seconds by default).
The body of the test is:

  _scratch_mkfs >> $seqres.full 2>&1
  _init_flakey
  _mount_flakey

  # Create our main test file 'foo', the one we check for data loss.
  # By doing an fsync against our file, it makes btrfs clear the 'needs_full_sync'
  # bit from its flags (btrfs inode specific flags).
  $XFS_IO_PROG -f -c "pwrite -S 0xaa 0 8K" \
                  -c "fsync" $SCRATCH_MNT/foo | _filter_xfs_io

  # Now create one other file and 2 directories. We will move this second file
  # from one directory to the other later because it forces btrfs to commit its
  # currently open transaction if we fsync the old parent directory. This is
  # necessary to trigger the data loss bug that affected btrfs.
  mkdir $SCRATCH_MNT/testdir_1
  touch $SCRATCH_MNT/testdir_1/bar
  mkdir $SCRATCH_MNT/testdir_2

  # Make sure everything is durably persisted.
  sync

  # Write more 8Kb of data to our file.
  $XFS_IO_PROG -c "pwrite -S 0xbb 8K 8K" $SCRATCH_MNT/foo | _filter_xfs_io

  # Move our 'bar' file into a new directory.
  mv $SCRATCH_MNT/testdir_1/bar $SCRATCH_MNT/testdir_2/bar

  # Fsync our first directory. Because it had a file moved into some other
  # directory, this made btrfs commit the currently open transaction. This is
  # a condition necessary to trigger the data loss bug.
  $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/testdir_1

  # Now fsync our main test file. If the fsync succeeds, we expect the 8Kb of
  # data we wrote previously to be persisted and available if a crash happens.
  # This did not happen with btrfs, because of the transaction commit that
  # happened when we fsynced the parent directory.
  $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/foo

  # Simulate a crash/power loss.
  _load_flakey_table $FLAKEY_DROP_WRITES
  _unmount_flakey

  _load_flakey_table $FLAKEY_ALLOW_WRITES
  _mount_flakey

  # Now check that all data we wrote before are available.
  echo "File content after log replay:"
  od -t x1 $SCRATCH_MNT/foo

  status=0
  exit

The expected golden output for the test, which is what we get with this
fix applied (or when running against ext3/4 and xfs), is:

  wrote 8192/8192 bytes at offset 0
  XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
  wrote 8192/8192 bytes at offset 8192
  XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
  File content after log replay:
  0000000 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
  *
  0020000 bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb
  *
  0040000

Without this fix applied, the output shows the test file does not have
the second 8Kb extent that we successfully fsynced:

  wrote 8192/8192 bytes at offset 0
  XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
  wrote 8192/8192 bytes at offset 8192
  XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
  File content after log replay:
  0000000 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
  *
  0020000

So fix this by skipping the fsync only if we're doing a full sync and
if the inode's last_trans is <= fs_info->last_trans_committed, or if
the inode is already in the log. Also remove setting the inode's
last_trans in btrfs_file_write_iter since it's useless/unreliable.

Also because btrfs_file_write_iter no longer sets inode->last_trans to
fs_info->generation + 1, don't set last_trans to 0 if we bail out and don't
bail out if last_trans is 0, otherwise something as simple as the following
example wouldn't log the second write on the last fsync:

  1. write to file

  2. fsync file

  3. fsync file
       |--> btrfs_inode_in_log() returns true and it set last_trans to 0

  4. write to file
       |--> btrfs_file_write_iter() no longers sets last_trans, so it
            remained with a value of 0
  5. fsync
       |--> inode->last_trans == 0, so it bails out without logging the
            second write

A test case for xfstests will be sent soon.

CC: <stable@vger.kernel.org>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>

This got added with my dirty_bgs patch, it's not needed.  Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>

* pm-domains:
  PM / Domains: cleanup: rename gpd -> genpd in debugfs interface

* pm-cpufreq:
  cpufreq: ppc: Add missing #include <asm/smp.h>

* acpi-video:
  ACPI / video: Propagate the error code for acpi_video_register
  ACPI / video: Load the module even if ACPI is disabled

* irq-pm:
  genirq / PM: describe IRQF_COND_SUSPEND
  tty: serial: atmel: rework interrupt and wakeup handling
  watchdog: at91sam9: request the irq with IRQF_NO_SUSPEND
  clk: at91: implement suspend/resume for the PMC irqchip
  rtc: at91rm9200: rework wakeup and interrupt handling
  rtc: at91sam9: rework wakeup and interrupt handling
  PM / wakeup: export pm_system_wakeup symbol
  genirq / PM: Add flag for shared NO_SUSPEND interrupt lines
  genirq / PM: better describe IRQF_NO_SUSPEND semantics

With certain restrictions it is possible for a wakeup device to share
an IRQ with an IRQF_NO_SUSPEND user, and the warnings introduced by
commit cab303be are spurious. The new
IRQF_COND_SUSPEND flag allows drivers to tell the core when these
restrictions are met, allowing spurious warnings to be silenced.

This patch documents how IRQF_COND_SUSPEND is expected to be used,
updating some of the text now made invalid by its addition.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

The IRQ line connected to the DBGU UART is often shared with a timer device
which request the IRQ with IRQF_NO_SUSPEND.

Since the UART driver is correctly disabling IRQs when entering suspend
we can safely request the IRQ with IRQF_COND_SUSPEND so that irq core
will not complain about mixing IRQF_NO_SUSPEND and !IRQF_NO_SUSPEND.

Rework the interrupt handler to wake the system up when an interrupt
happens on the DEBUG_UART while the system is suspended.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

The watchdog interrupt (only used when activating software watchdog)
shouldn't be suspended when entering suspend mode, because it is shared
with a timer device (which request the line with IRQF_NO_SUSPEND) and once
the watchdog "Mode Register" has been written, it cannot be changed (which
means we cannot disable the watchdog interrupt when entering suspend).
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

* suspend-to-idle:
  cpuidle / sleep: Use broadcast timer for states that stop local timer
  cpuidle: Clean up fallback handling in cpuidle_idle_call()
  cpuidle / sleep: Do sanity checks in cpuidle_enter_freeze() too
  idle / sleep: Avoid excessive disabling and enabling interrupts

* acpi-resources:
  x86/PCI/ACPI: Relax ACPI resource descriptor checks to work around BIOS bugs
  x86/PCI/ACPI: Ignore resources consumed by host bridge itself
  PCI: versatile: Update for list_for_each_entry() API change

Commit 38106313 (PM / sleep: Re-implement suspend-to-idle handling)
overlooked the fact that entering some sufficiently deep idle states
by CPUs may cause their local timers to stop and in those cases it
is necessary to switch over to a broadcast timer prior to entering
the idle state.  If the cpuidle driver in use does not provide
the new ->enter_freeze callback for any of the idle states, that
problem affects suspend-to-idle too, but it is not taken into account
after the changes made by commit 38106313.

Fix that by changing the definition of cpuidle_enter_freeze() and
re-arranging of the code in cpuidle_idle_call(), so the former does
not call cpuidle_enter() any more and the fallback case is handled
by cpuidle_idle_call() directly.

Fixes: 38106313 (PM / sleep: Re-implement suspend-to-idle handling)
Reported-and-tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

Pull x86 fixes from Ingo Molnar:
 "Misc fixes: EFI fixes, an Intel Quark fix, an asm fix and an FPU
  handling fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fpu/xsaves: Fix improper uses of __ex_table
  x86/intel/quark: Select COMMON_CLK
  x86/asm/entry/64: Remove a bogus 'ret_from_fork' optimization
  firmware: dmi_scan: Fix dmi_len type
  efi/libstub: Fix boundary checking in efi_high_alloc()
  firmware: dmi_scan: Fix dmi scan to handle "End of Table" structure

Commit:

  f31a9f7c ("x86/xsaves: Use xsaves/xrstors to save and restore xsave area")

introduced alternative instructions for XSAVES/XRSTORS and commit:

  adb9d526 ("x86/xsaves: Add xsaves and xrstors support for booting time")

added support for the XSAVES/XRSTORS instructions at boot time.

Unfortunately both failed to properly protect them against faulting:

The 'xstate_fault' macro will use the closest label named '1'
backward and that ends up in the .altinstr_replacement section
rather than in .text. This means that the kernel will never find
in the __ex_table the .text address where this instruction might
fault, leading to serious problems if userspace manages to
trigger the fault.
Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Signed-off-by: Jamie Iles <jamie.iles@oracle.com>
[ Improved the changelog, fixed some whitespace noise. ]
Acked-by: Borislav Petkov <bp@alien8.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@vger.kernel.org>
Cc: Allan Xavier <mr.a.xavier@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: adb9d526 ("x86/xsaves: Add xsaves and xrstors support for booting time")
Fixes: f31a9f7c ("x86/xsaves: Use xsaves/xrstors to save and restore xsave area")
Signed-off-by: Ingo Molnar <mingo@kernel.org>