Pull security layer fixes from James Morris:
 "A fix for SELinux policy processing (regression introduced by
  commit fa1aa143: "selinux: extended permissions for ioctls"), as
  well as a fix for the user-triggerable oops in the Keys code"

* 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  KEYS: Fix handling of stored error in a negatively instantiated user key
  selinux: fix bug in conditional rules handling

Pull ARM SoC fixes from Arnd Bergmann:
 "There is a small backlog of at91 patches here, the most significant is
  the addition of some sama5d2 Xplained nodes that were waiting on an
  MFD include file to get merged through another tree.

  We normally try to sort those out before the merge window opens, but
  the maintainer wasn't aware of that here and I decided to merge the
  changes this time as an exception.

  On OMAP a series of audio changes for dra7 missed the merge window but
  turned out to be necessary to fix a boot time imprecise external abort
  error and to get audio working.

  The other changes are the usual simple changes, here is a list sorted
  by platform:

  at91:
	removal of a useless defconfig option
	removal of some legacy DT pieces
	use of the proper watchdog compatible string
	update of the MAINTAINERS entries for some Atmel drivers

  drivers/scpi:
	hide get_scpi_ops in module from built-in code

  imx:
	add missing .irq_set_type for i.MX GPC irq_chip.
	fix the wrong spi-num-chipselects settings for Vybrid DSPI devices.
	fix a merge error in Vybrid dts regarding to ADC device property

  keystone:
        fix the optional PDSP firmware loading
        fix linking RAM setup for QMs
        fix crash with clk_ignore_unused

  mediatek:
	Enable SCPSYS power domain driver by default

  mvebu:
	fix QNAP TS219 power-off in dts
	fix legacy get_irqnr_and_base for dove and orion5x

  omap:
	fix l4 related boot time errors for dm81xx
	use lockless cldm/pwrdm api in omap4_boot_secondary
	remove t410 abort handler to avoid hiding other critical errors
	mark cpuidle tracepoints as _rcuidle
	fix module alias for omap-ocp2scp

  pxa:
	palm: Fix typos in PWM lookup table code

  renesas:
	missing __initconst annotation for r8a7793_boards_compat_dt

  rockchip:
	disable mmc-tuning on the veyron-minnie board
	adding the init state for the over-temperature-protection

  zx:
	only build power domain code when CONFIG_PM=y"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (31 commits)
  ARM: OMAP4+: SMP: use lockless clkdm/pwrdm api in omap4_boot_secondary
  arm: omap2+: add missing HWMOD_NO_IDLEST in 81xx hwmod data
  ARM: orion5x: Fix legacy get_irqnr_and_base
  ARM: dove: Fix legacy get_irqnr_and_base
  soc: Mediatek: Enable SCPSYS power domain driver by default
  ARM: dts: vfxxx: Fix dspi[01] spi-num-chipselects.
  ARM: dts: keystone: k2l: fix kernel crash when clk_ignore_unused is not in bootargs
  soc: ti: knav_qmss_queue: Fix linking RAM setup for queue managers
  soc: ti: use request_firmware_direct() as acc firmware is optional
  ARM: imx: add platform irq type setting in gpc
  ARM: dts: vfxxx: Fix erroneous property in esdhc0 node
  ARM: shmobile: r8a7793: proper constness with __initconst
  scpi: hide get_scpi_ops in module from built-in code
  ARM: zx: only build power domain code when CONFIG_PM=y
  ARM: pxa: palm: Fix typos in PWM lookup table code
  ARM: dts: Kirkwood: Fix QNAP TS219 power-off
  ARM: dts: rockchip: Add OTP gpio pinctrl to rk3288 tsadc node
  ARM: dts: rockchip: temporarily remove emmc hs200 speed from rk3288 minnie
  MAINTAINERS: Atmel drivers: change NAND and ISI entries
  ARM: at91/dt: sama5d2 Xplained: add several devices
  ...

Pull more power management and ACPI fixes from Rafael Wysocki:
 "These fix one recent regression (cpufreq core), fix up two features
  added recently (ACPI CPPC support, SCPI support in the arm_big_little
  cpufreq driver) and fix three older bugs in the intel_pstate driver.

  Specifics:

   - Fix a recent regression in the cpufreq core causing it to fail to
     clean up sysfs directories properly on cpufreq driver removal
     (Viresh Kumar).

   - Fix a build problem in the SCPI support code recently added to the
     arm_big_little cpufreq driver (Punit Agrawal).

   - Fix up the recently added CPPC cpufreq frontend to process the CPU
     coordination information provided by the platform firmware
     correctly (Ashwin Chaugule).

   - Fix the intel_pstate driver to behave as intended when switched
     over to the "performance" mode via sysfs if hardware-driven P-state
     selection (HWP) is enabled (Alexandra Yates).

   - Fix two rounding errors in the intel_pstate driver that sometimes
     cause it to use lower P-states than requested (Prarit Bhargava)"

* tag 'pm+acpi-4.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  intel_pstate: Fix "performance" mode behavior with HWP enabled
  cpufreq: SCPI: Depend on SCPI clk driver
  cpufreq: intel_pstate: Fix limits->max_perf rounding error
  cpufreq: intel_pstate: Fix limits->max_policy_pct rounding error
  cpufreq: Always remove sysfs cpuX/cpufreq link on ->remove_dev()
  cpufreq: CPPC: Initialize and check CPUFreq CPU co-ord type correctly

Pull sound fixes from Takashi Iwai:
 "Here are no big surprises but just all small fixes, mostly
  device-specific quirks for HD-audio and USB-audio:

   - Fix for detection of FireWire DICE Loud devices
   - Intel Broxton HDMI/DP PCI IDs and relevant quirks
   - Noise fixes: Dell XPS13 2015 model, Dell Latitude E6440, Gigabyte
     Z170X mobo
   - Fix the headphone mixer assignment on HP laptops for PulseAudio
   - USB-MIDI fixes for Medeli DD305 and CH345
   - Apply fixup for Acer Aspire One Cloudbook 14"

* tag 'sound-4.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Fix noise on Gigabyte Z170X mobo
  ALSA: hda - Fix headphone noise after Dell XPS 13 resume back from S3
  ALSA: hda - Apply HP headphone fixups more generically
  ALSA: hda - Add fixup for Acer Aspire One Cloudbook 14
  ALSA: hda - apply SKL display power request/release patch to BXT
  ALSA: hda - add PCI IDs for Intel Broxton
  ALSA: usb-audio: work around CH345 input SysEx corruption
  ALSA: usb-audio: prevent CH345 multiport output SysEx corruption
  ALSA: usb-audio: add packet size quirk for the Medeli DD305
  ALSA: dice: fix detection of Loud devices
  ALSA: hda - Fix noise on Dell Latitude E6440

Pull arm64 fixes from Catalin Marinas:

 - Build fix when !CONFIG_UID16 (the patch is touching generic files but
   it only affects arm64 builds; submitted by Arnd Bergmann)

 - EFI fixes to deal with early_memremap() returning NULL and correctly
   mapping run-time regions

 - Fix CPUID register extraction of unsigned fields (not to be
   sign-extended)

 - ASID allocator fix to deal with long-running tasks over multiple
   generation roll-overs

 - Revert support for marking page ranges as contiguous PTEs (it leads
   to TLB conflicts and requires additional non-trivial kernel changes)

 - Proper early_alloc() failure check

 - Disable KASan for 48-bit VA and 16KB page configuration (the pgd is
   larger than the KASan shadow memory)

 - Update the fault_info table (original descriptions based on early
   engineering spec)

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: efi: fix initcall return values
  arm64: efi: deal with NULL return value of early_memremap()
  arm64: debug: Treat the BRPs/WRPs as unsigned
  arm64: cpufeature: Track unsigned fields
  arm64: cpufeature: Add helpers for extracting unsigned values
  Revert "arm64: Mark kernel page ranges contiguous"
  arm64: mm: keep reserved ASIDs in sync with mm after multiple rollovers
  arm64: KASAN depends on !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
  arm64: efi: correctly map runtime regions
  arm64: mm: fix fault_info table xFSC decoding
  arm64: fix building without CONFIG_UID16
  arm64: early_alloc: Fix check for allocation failure

Pull nios2 fix from Ley Foon Tan:
 "nios2: fix cache coherency"

* tag 'nios2-v4.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2:
  nios2: fix cache coherency

Pull ARC fixes from Vineet Gupta:
 - Fix for perf callgraph unwinding causing RCU stalls
 - Fix to enable Linux to run on non-default Interrupt priority 0
 - Removal of pointless SYNC from __switch_to()

* tag 'arc-4.4-rc3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: dw2 unwind: Remove falllback linear search thru FDE entries
  ARC: remove SYNC from __switch_to()
  ARCv2: Use the default irq priority for idle sleep
  ARC: Abstract out ISA specific SLEEP args
  ARC: comments update
  ARC: switch to arc-linux- CROSS_COMPILE prefix across all configs

Merge tag 'v4.4-rockchip-dts32-fixes1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into fixes

Merge "ARM: rockchip: devicetree fixes for 4.4" from Heiko Stuebner:

Two fixes to Rockchip devicetree files, disabling the mmc-tuning
on the veyron-minnie board for now and adding the init state for
the over-temperature-protection to prevent glitches making the
system reboot sometimes.

* tag 'v4.4-rockchip-dts32-fixes1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
  ARM: dts: rockchip: Add OTP gpio pinctrl to rk3288 tsadc node
  ARM: dts: rockchip: temporarily remove emmc hs200 speed from rk3288 minnie

Merge "mvebu fixes for 4.4 (part 1)" from Jason Cooper:

- Fix QNAP TS219 power-off in dts
- Fix legacy get_irqnr_and_base for dove and orion5x

* tag 'mvebu-fixes-4.4-1' of git://git.infradead.org/linux-mvebu:
  ARM: orion5x: Fix legacy get_irqnr_and_base
  ARM: dove: Fix legacy get_irqnr_and_base
  ARM: dts: Kirkwood: Fix QNAP TS219 power-off

Merge tag 'renesas-fixes-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes

Merge "Renesas ARM Based SoC Fixes for v4.4" from Simon Horman:

* r8a7793 SoC: Annotate r8a7793_boards_compat_dt with __initconst
  Aside from being correct this builds that otherwise
  fail with section mismatch errors.

* tag 'renesas-fixes-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: r8a7793: proper constness with __initconst

* pm-cpufreq:
  intel_pstate: Fix "performance" mode behavior with HWP enabled
  cpufreq: SCPI: Depend on SCPI clk driver
  cpufreq: intel_pstate: Fix limits->max_perf rounding error
  cpufreq: intel_pstate: Fix limits->max_policy_pct rounding error
  cpufreq: Always remove sysfs cpuX/cpufreq link on ->remove_dev()

* acpi-cppc:
  cpufreq: CPPC: Initialize and check CPUFreq CPU co-ord type correctly

Pull xen bug fixes from David Vrabel:

 - Fix gntdev and numa balancing.

 - Fix x86 boot crash due to unallocated legacy irq descs.

 - Fix overflow in evtchn device when > 1024 event channels.

* tag 'for-linus-4.4-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/evtchn: dynamically grow pending event channel ring
  xen/events: Always allocate legacy interrupts on PV guests
  xen/gntdev: Grant maps should not be subject to NUMA balancing

Pull powerpc fixes from Michael Ellerman:

 - tm: Block signal return from setting invalid MSR state from Michael
   Neuling

 - tm: Check for already reclaimed tasks from Michael Neuling

* tag 'powerpc-4.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/tm: Check for already reclaimed tasks
  powerpc/tm: Block signal return setting invalid MSR state

If more than 1024 event channels are bound to a evtchn device then it
possible (even with well behaved applications) for the ring to
overflow and events to be lost (reported as an -EFBIG error).

Dynamically increase the size of the ring so there is always enough
space for all bound events.  Well behaved applicables that only unmask
events after draining them from the ring can thus no longer lose
events.

However, an application could unmask an event before draining it,
allowing multiple entries per port to accumulate in the ring, and a
overflow could still occur.  So the overflow detection and reporting
is retained.

The ring size is initially only 64 entries so the common use case of
an application only binding a few events will use less memory than
before.  The ring size may grow to 512 KiB (enough for all 2^17
possible channels).  This order 7 kmalloc() may fail due to memory
fragmentation, so we fall back to trying vmalloc().

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

Even though initcall return values are typically ignored, the
prototype is to return 0 on success or a negative errno value on
error. So fix the arm_enable_runtime_services() implementation to
return 0 on conditions that are not in fact errors, and return a
meaningful error code otherwise.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Add NULL return value checks to two invocations of early_memremap()
in the UEFI init code. For the UEFI configuration tables, we just
warn since we have a better chance of being able to report the issue
in a way that can actually be noticed by a human operator if we don't
abort right away. For the UEFI memory map, however, all we can do is
panic() since we cannot proceed without a description of memory.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

IDAA64DFR0_EL1: BRPs and WRPs are unsigned values. Use
the appropriate helpers to extract those fields.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reported-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Some of the feature bits have unsigned values and need
to be treated accordingly to avoid errors. Adds the property
to the feature bits and use the appropriate field extract helpers.

Reported-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

After commit 8c058b0b

 ("x86/irq: Probe for PIC presence before
allocating descs for legacy IRQs") early_irq_init() will no longer
preallocate descriptors for legacy interrupts if PIC does not
exist, which is the case for Xen PV guests.

Therefore we may need to allocate those descriptors ourselves.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

The cpuid_feature_extract_field() extracts the feature value
as a signed integer. This could be problematic for features
whose values are unsigned. e.g, ID_AA64DFR0_EL1:BRPs. Add
an unsigned variant for the unsigned fields.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reported-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Doing so will cause the grant to be unmapped and then, during
fault handling, the fault to be mistakenly treated as NUMA hint
fault.

In addition, even if those maps could partcipate in NUMA
balancing, it wouldn't provide any benefit since we are unable
to determine physical page's node (even if/when VNUMA is
implemented).

Marking grant maps' VMAs as VM_IO will exclude them from being
part of NUMA balancing.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

This reverts commit 348a65cd

.

Incorrect page table manipulation that does not respect the ARM ARM
recommended break-before-make sequence may lead to TLB conflicts. The
contiguous PTE patch makes the system even more susceptible to such
errors by changing the mapping from a single page to a contiguous range
of pages. An additional TLB invalidation would reduce the risk window,
however, the correct fix is to switch to a temporary swapper_pg_dir.
Once the correct workaround is done, the reverted commit will be
re-applied.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Jeremy Linton <jeremy.linton@arm.com>

Under some unusual context-switching patterns, it is possible to end up
with multiple threads from the same mm running concurrently with
different ASIDs:

1. CPU x schedules task t with mm p containing ASID a and generation g
   This task doesn't block and the CPU doesn't context switch.
   So:
     * per_cpu(active_asid, x) = {g,a}
     * p->context.id = {g,a}

2. Some other CPU generates an ASID rollover. The global generation is
   now (g + 1). CPU x is still running t, with no context switch and
   so per_cpu(reserved_asid, x) = {g,a}

3. CPU y schedules task t', which shares mm p with t. The generation
   mismatches, so we take the slowpath and hit the reserved ASID from
   CPU x. p is then updated so that p->context.id = {g + 1,a}

4. CPU y schedules some other task u, which has an mm != p.

5. Some other CPU generates *another* CPU rollover. The global
   generation is now (g + 2). CPU x is still running t, with no context
   switch and so per_cpu(reserved_asid, x) = {g,a}.

6. CPU y once again schedules task t', but now *fails* to hit the
   reserved ASID from CPU x because of the generation mismatch. This
   results in a new ASID being allocated, despite the fact that t is
   still running on CPU x with the same mm.

Consequently, TLBIs (e.g. as a result of CoW) will not be synchronised
between the two threads.

This patch fixes the problem by updating all of the matching reserved
ASIDs when we hit on the slowpath (i.e. in step 3 above). This keeps
the reserved ASIDs in-sync with the mm and avoids the problem.

Reported-by: Tony Thompson <anthony.thompson@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

On KASAN + 16K_PAGES + 48BIT_VA
 arch/arm64/mm/kasan_init.c: In function ‘kasan_early_init’:
 include/linux/compiler.h:484:38: error: call to ‘__compiletime_assert_95’ declared with attribute error: BUILD_BUG_ON failed: !IS_ALIGNED(KASAN_SHADOW_END, PGDIR_SIZE)
    _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)

Currently KASAN will not work on 16K_PAGES and 48BIT_VA, so
forbid such configuration to avoid above build failure.

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reported-by: Suzuki K. Poulose <Suzuki.Poulose@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

There is intermittent cache coherency issue caught in toolchian tests.
Revert to use flushd.

Signed-off-by: Ley Foon Tan <lftan@altera.com>

Pull vfs fixes from Al Viro:
 "A couple of fixes for sendfile lockups caught by Dmitry + a fix for
  ancient sysvfs symlink breakage"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  vfs: Avoid softlockups with sendfile(2)
  vfs: Make sendfile(2) killable even better
  fix sysvfs symlinks

Merge tag 'omap-for-v4.4/fixes-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes

Merge "Fixes for omaps for v4.4-rc cycle" from Tony Lindgren:

- A series of audio changes for dra7 that missed the merge window but turned
  out to be necessary to fix a boot time imprecise external abort error and to
  getaudio working

- Fix l4 related boot time errors for dm81xx

- Use lockless cldm/pwrdm api in omap4_boot_secondary

- Remove t410 custom abort handler that is no longer needed and may
  hide other critical errors

- Mark cpuidle tracepoints as _rcuidle

- Fix module alias for omap-ocp2scp

* tag 'omap-for-v4.4/fixes-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP4+: SMP: use lockless clkdm/pwrdm api in omap4_boot_secondary
  arm: omap2+: add missing HWMOD_NO_IDLEST in 81xx hwmod data
  ARM: OMAP2+: remove custom abort handler for t410
  ARM: OMAP: DRA7: hwmod: Add data for McASP3
  ARM: OMAP2+: hwmod: Add hwmod flag for HWMOD_OPT_CLKS_NEEDED
  ARM: dts: dra7: Fix McASP3 node regarding to clocks
  bus: omap-ocp2scp: Fix module alias
  ARM: OMAP2+: PM: Denote the cpuidle tracepoints as _rcuidle()

Merge tag 'keystone-fixes-for-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into fixes

Merge "Few Keystone fixes for 4.4-rcx" from Santosh Shilimkar:
	- Fix the optional PDSP firmware loading
	- Fix linking RAM setup for QMs
	- Fix crash with clk_ignore_unused

* tag 'keystone-fixes-for-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone:
  ARM: dts: keystone: k2l: fix kernel crash when clk_ignore_unused is not in bootargs
  soc: ti: knav_qmss_queue: Fix linking RAM setup for queue managers
  soc: ti: use request_firmware_direct() as acc firmware is optional

Linux 4.4-rc2 is backmerged from the keystone fixes.

Merge tag 'imx-fixes-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into fixes

Merge "The i.MX fixes for 4.4" from Shawn Guo:

- Add missing .irq_set_type for i.MX GPC irq_chip.  It fixes an issue
  that device IRQ type setting doesn't match the one specified in device
  tree, since stacked IRQ domain is adopted in GPC driver.
- Fix the wrong spi-num-chipselects settings for Vybrid DSPI devices.
- Fix a merge error in Vybrid dts regarding to ADC device property
  fsl,adck-max-frequency

* tag 'imx-fixes-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: dts: vfxxx: Fix dspi[01] spi-num-chipselects.
  ARM: imx: add platform irq type setting in gpc
  ARM: dts: vfxxx: Fix erroneous property in esdhc0 node

If hardware-driven P-state selection (HWP) is enabled, the
"performance" mode of intel_pstate should only allow the processor
to use the highest-performance P-state available.  That is not
the case currently, so make it actually happen.

Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Alexandra Yates <alexandra.yates@linux.intel.com>
[ rjw: Subject and changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Pull more block layer fixes from Jens Axboe:
 "I wasn't going to send off a new pull before next week, but the blk
  flush fix from Jan from the other day introduced a regression.  It's
  rare enough not to have hit during testing, since it requires both a
  device that rejects the first flush, and bad timing while it does
  that.  But since someone did hit it, let's get the revert into 4.4-rc3
  so we don't have a released rc with that known issue.

  Apart from that revert, three other fixes:

   - From Christoph, a fix for a missing unmap in NVMe request
     preparation.

   - An NVMe fix from Nishanth that fixes data corruption on powerpc.

   - Also from Christoph, fix a list_del() attempt on blk-mq that didn't
     have a matching list_add() at timer start"

* 'for-linus' of git://git.kernel.dk/linux-block:
  Revert "blk-flush: Queue through IO scheduler when flush not required"
  block: fix blk_abort_request for blk-mq drivers
  nvme: add missing unmaps in nvme_queue_rq
  NVMe: default to 4k device page size

OMAP CPU hotplug uses cpu1's clocks and power domains for CPU1 wake up
from low power states (or turn on CPU1). This part of code is also
part of system suspend (disable_nonboot_cpus()).
>From other side, cpu1's clocks and power domains are used by CPUIdle. All above
functionality is mutually exclusive and, therefore, lockless clkdm/pwrdm api
can be used in omap4_boot_secondary().

This fixes below back-trace on -RT which is triggered by
pwrdm_lock/unlock():

BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917
 in_atomic(): 1, irqs_disabled(): 0, pid: 118, name: sh
 9 locks held by sh/118:
  #0:  (sb_writers#4){.+.+.+}, at: [<c0144a6c>] vfs_write+0x13c/0x164
  #1:  (&of->mutex){+.+.+.}, at: [<c01b4c70>] kernfs_fop_write+0x48/0x19c
  #2:  (s_active#24){.+.+.+}, at: [<c01b4c78>] kernfs_fop_write+0x50/0x19c
  #3:  (device_hotplug_lock){+.+.+.}, at: [<c03cbff0>] lock_device_hotplug_sysfs+0xc/0x4c
  #4:  (&dev->mutex){......}, at: [<c03cd284>] device_online+0x14/0x88
  #5:  (cpu_add_remove_lock){+.+.+.}, at: [<c003af90>] cpu_up+0x50/0x1a0
  #6:  (cpu_hotplug.lock){++++++}, at: [<c003ae48>] cpu_hotplug_begin+0x0/0xc4
  #7:  (cpu_hotplug.lock#2){+.+.+.}, at: [<c003aec0>] cpu_hotplug_begin+0x78/0xc4
  #8:  (boot_lock){+.+...}, at: [<c002b254>] omap4_boot_secondary+0x1c/0x178
 Preemption disabled at:[<  (null)>]   (null)

 CPU: 0 PID: 118 Comm: sh Not tainted 4.1.12-rt11-01998-gb4a62c3-dirty #137
 Hardware name: Generic DRA74X (Flattened Device Tree)
 [<c0017574>] (unwind_backtrace) from [<c0013be8>] (show_stack+0x10/0x14)
 [<c0013be8>] (show_stack) from [<c05a8670>] (dump_stack+0x80/0x94)
 [<c05a8670>] (dump_stack) from [<c05ad158>] (rt_spin_lock+0x24/0x54)
 [<c05ad158>] (rt_spin_lock) from [<c0030dac>] (clkdm_wakeup+0x10/0x2c)
 [<c0030dac>] (clkdm_wakeup) from [<c002b2c0>] (omap4_boot_secondary+0x88/0x178)
 [<c002b2c0>] (omap4_boot_secondary) from [<c0015d00>] (__cpu_up+0xc4/0x164)
 [<c0015d00>] (__cpu_up) from [<c003b09c>] (cpu_up+0x15c/0x1a0)
 [<c003b09c>] (cpu_up) from [<c03cd2d4>] (device_online+0x64/0x88)
 [<c03cd2d4>] (device_online) from [<c03cd360>] (online_store+0x68/0x74)
 [<c03cd360>] (online_store) from [<c01b4ce0>] (kernfs_fop_write+0xb8/0x19c)
 [<c01b4ce0>] (kernfs_fop_write) from [<c0144124>] (__vfs_write+0x20/0xd8)
 [<c0144124>] (__vfs_write) from [<c01449c0>] (vfs_write+0x90/0x164)
 [<c01449c0>] (vfs_write) from [<c01451e4>] (SyS_write+0x44/0x9c)
 [<c01451e4>] (SyS_write) from [<c0010240>] (ret_fast_syscall+0x0/0x54)
 CPU1: smp_ops.cpu_die() returned, trying to resuscitate

Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Add missing HWMOD_NO_IDLEST hwmod flag for entries not
having omap4 clkctrl values.
The emac0 hwmod flag fixes the davinci_emac driver probe
since the return of pm_resume() call is now checked.

This solves the following boot errors :
[    0.121429] omap_hwmod: l4_ls: _wait_target_ready failed: -16
[    0.121441] omap_hwmod: l4_ls: cannot be enabled for reset (3)
[    0.124342] omap_hwmod: l4_hs: _wait_target_ready failed: -16
[    0.124352] omap_hwmod: l4_hs: cannot be enabled for reset (3)
[    1.967228] omap_hwmod: emac0: _wait_target_ready failed: -16

Cc: Brian Hutchinson <b.hutchman@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

This reverts commit 1b2ff19e.

Jan writes:

--

Thanks for report! After some investigation I found out we allocate
elevator specific data in __get_request() only for non-flush requests. And
this is actually required since the flush machinery uses the space in
struct request for something else. Doh. So my patch is just wrong and not
easy to fix since at the time __get_request() is called we are not sure
whether the flush machinery will be used in the end. Jens, please revert
1b2ff19e. Thanks!

I'm somewhat surprised that you can reliably hit the race where flushing
gets disabled for the device just while the request is in flight. But I
guess during boot it makes some sense.

--

So let's just revert it, we can fix the queue run manually after the
fact. This race is rare enough that it didn't trigger in testing, it
requires the specific disable-while-in-flight scenario to trigger.

Pull KVM fixes from Paolo Bonzini:
 "Bug fixes for all architectures.  Nothing really stands out"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (21 commits)
  KVM: nVMX: remove incorrect vpid check in nested invvpid emulation
  arm64: kvm: report original PAR_EL1 upon panic
  arm64: kvm: avoid %p in __kvm_hyp_panic
  KVM: arm/arm64: vgic: Trust the LR state for HW IRQs
  KVM: arm/arm64: arch_timer: Preserve physical dist. active state on LR.active
  KVM: arm/arm64: Fix preemptible timer active state crazyness
  arm64: KVM: Add workaround for Cortex-A57 erratum 834220
  arm64: KVM: Fix AArch32 to AArch64 register mapping
  ARM/arm64: KVM: test properly for a PTE's uncachedness
  KVM: s390: fix wrong lookup of VCPUs by array index
  KVM: s390: avoid memory overwrites on emergency signal injection
  KVM: Provide function for VCPU lookup by id
  KVM: s390: fix pfmf intercept handler
  KVM: s390: enable SIMD only when no VCPUs were created
  KVM: x86: request interrupt window when IRQ chip is split
  KVM: x86: set KVM_REQ_EVENT on local interrupt request from user space
  KVM: x86: split kvm_vcpu_ready_for_interrupt_injection out of dm_request_for_irq_injection
  KVM: x86: fix interrupt window handling in split IRQ chip case
  MIPS: KVM: Uninit VCPU in vcpu_create error path
  MIPS: KVM: Fix CACHE immediate offset sign extension
  ...

The kernel may use a page granularity of 4K, 16K, or 64K depending on
configuration.

When mapping EFI runtime regions, we use memrange_efi_to_native to round
the physical base address of a region down to a kernel page boundary,
and round the size up to a kernel page boundary, adding the residue left
over from rounding down the physical base address. We do not round down
the virtual base address.

In __create_mapping we account for the offset of the virtual base from a
granule boundary, adding the residue to the size before rounding the
base down to said granule boundary.

Thus we account for the residue twice, and when the residue is non-zero
will cause __create_mapping to map an additional page at the end of the
region. Depending on the memory map, this page may be in a region we are
not intended/permitted to map, or may clash with a different region that
we wish to map. In typical cases, mapping the next item in the memory
map will overwrite the erroneously created entry, as we sort the memory
map in the stub.

As __create_mapping can cope with base addresses which are not page
aligned, we can instead rely on it to map the region appropriately, and
simplify efi_virtmap_init by removing the unnecessary code.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

We are missing descriptions for some valid xFSC values in the fault info
table (e.g. "TLB conflict abort"), and have erroneous descriptions for
reserved values (e.g. "asynchronous external abort", "debug event").

This patch adds the missing xFSC values, and removes erroneous decoding
of values reserved by the architecture, as described in ARM DDI 0487A.h.

At the same time, fixed the unbalanced brackets for the synchronous
parity error strings in the table.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>