The vmstat code uses "schedule_delayed_work_on()" to do the initial
startup of the delayed work on the right CPU, but then once it was
started it would use the non-cpu-specific "schedule_delayed_work()" to
re-schedule it on that CPU.

That just happened to schedule it on the same CPU historically (well, in
almost all situations), but the code _requires_ this work to be per-cpu,
and should say so explicitly rather than depend on the non-cpu-specific
scheduling to schedule on the current CPU.

The timer code is being changed to not be as single-minded in always
running things on the calling CPU.

See also commit 874bbfe6 ("workqueue: make sure delayed work run in
local cpu") that for now maintains the local CPU guarantees just in case
there are other broken users that depended on the accidental behavior.

Cc: Christoph Lameter <cl@linux.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull workqueue fixlet from Tejun Heo:
 "Single patch to make delayed work always be queued on the local CPU"

This is not actually something we should guarantee, but it's something
we by accident have historically done, and at least one call site has
grown to depend on it.

I'm going to fix that known broken callsite, but in the meantime this
makes the accidental behavior be explicit, just in case there are other
cases that might depend on it.

* 'for-4.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: make sure delayed work run in local cpu

Pull KVM fixes from Paolo Bonzini:
 "Bug fixes for system management mode emulation.

  The first two patches fix SMM emulation on Nehalem processors.  The
  others fix some cases that became apparent as work progressed on the
  firmware side"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: fix RSM into 64-bit protected mode
  KVM: x86: fix previous commit for 32-bit
  KVM: x86: fix SMI to halted VCPU
  KVM: x86: clean up kvm_arch_vcpu_runnable
  KVM: x86: map/unmap private slots in __x86_set_memory_region
  KVM: x86: build kvm_userspace_memory_region in x86_set_memory_region

Pull MFD fixes from Lee Jones:
 "Bug Fixes:

   - Return correct error code i.e. not zero

   - Fix build error when !CONFIG_PM_SLEEP"

* tag 'mfd-fixes-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
  mfd: max77843: Fix max77843_chg_init() return on error
  mfd: intel-lpss: Fix build error when !CONFIG_PM_SLEEP

In order to get into 64-bit protected mode, you need to enable
paging while EFER.LMA=1.  For this to work, CS.L must be 0.
Currently, we load the segments before CR0 and CR4, which means
that if RSM returns into 64-bit protected mode CS.L is already 1
and everything breaks.

Luckily, CS.L=0 is always the case when executing RSM, because it
is forbidden to execute RSM from 64-bit protected mode.  Hence it
is enough to load CR0 and CR4 first, and only then the segments.

Fixes: 660a5d51
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Unfortunately I only noticed this after pushing.

Fixes: f0d648bd
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Pull nfsd fixes from Bruce Fields:
 "Two nfsd fixes, one for an RDMA crash, one for a pnfs/block protocol
  bug"

* tag 'nfsd-4.3-2' of git://linux-nfs.org/~bfields/linux:
  svcrdma: Fix NFS server crash triggered by 1MB NFS WRITE
  nfsd/blocklayout: accept any minlength

Pull crypto fixes from Herbert Xu:
 "This fixes the following issues:

   - Fix AVX detection to prevent use of non-existent AESNI.

   - Some SPARC ciphers did not set their IV size which may lead to
     memory corruption"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: ahash - ensure statesize is non-zero
  crypto: camellia_aesni_avx - Fix CPU feature checks
  crypto: sparc - initialize blkcipher.ivsize

Pull IOMMU fixes from Joerg Roedel:
 "A few fixes piled up:

   - Fix for a suspend/resume issue where PCI probing code overwrote
     dev->irq for the MSI irq of the AMD IOMMU.

   - Fix for a kernel crash when a 32 bit PCI device was assigned to a
     KVM guest.

   - Fix for a possible memory leak in the VT-d driver

   - A couple of fixes for the ARM-SMMU driver"

* tag 'iommu-fixes-v4.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Fix NULL pointer deref on device detach
  iommu/amd: Prevent binding other PCI drivers to IOMMU PCI devices
  iommu/vt-d: Fix memory leak in dmar_insert_one_dev_info()
  iommu/arm-smmu: Use correct address mask for CMD_TLBI_S2_IPA
  iommu/arm-smmu: Ensure IAS is set correctly for AArch32-capable SMMUs
  iommu/io-pgtable-arm: Don't use dma_to_phys()

Pull drm fixes from Dave Airlie:
 "I got a bit behind last week, so here is a delayed fixes pull:

   - a bunch of radeon/amd gpu fixes
   - some nouveau regression fixes (ppc bios reading and runtime pm fix)
   - one drm core oops fix
   - two qxl locking fixes
   - one qxl regression fix"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/nouveau/bios: fix OF loading
  drm/nouveau/fbcon: take runpm reference when userspace has an open fd
  drm/nouveau/nouveau: Disable AGP for SiS 761
  drm/nouveau/display: allow up to 16k width/height for fermi+
  drm/nouveau/bios: translate devinit pri/sec i2c bus to internal identifiers
  drm: Fix locking for sysfs dpms file
  drm/amdgpu: fix memory leak in amdgpu_vm_update_page_directory
  drm/amdgpu: fix 32-bit compiler warning
  drm/qxl: avoid dependency lock
  drm/qxl: avoid buffer reservation in qxl_crtc_page_flip
  drm/qxl: fix framebuffer dirty rectangle tracking.
  drm/amdgpu: flag iceland as experimental
  drm/amdgpu: check before checking pci bridge registers
  drm/amdgpu: fix num_crtc on CZ
  drm/amdgpu: restore the fbdev mode in lastclose
  drm/radeon: restore the fbdev mode in lastclose
  drm/radeon: add quirk for ASUS R7 370
  drm/amdgpu: add pm sysfs files late
  drm/radeon: add pm sysfs files late

An SMI to a halted VCPU must wake it up, hence a VCPU with a pending
SMI must be considered runnable.

Fixes: 64d60670
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Split the huge conditional in two functions.

Fixes: 64d60670
Cc: stable@vger.kernel.org
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Otherwise, two copies (one of them never populated and thus bogus)
are allocated for the regular and SMM address spaces.  This breaks
SMM with EPT but without unrestricted guest support, because the
SMM copy of the identity page map is all zeros.

By moving the allocation to the caller we also remove the last
vestiges of kernel-allocated memory regions (not accessible anymore
in userspace since commit b74a07be, "KVM: Remove kernel-allocated
memory regions", 2010-06-21); that is a nice bonus.
Reported-by: Alexandre DERUMIER <aderumier@odiso.com>
Cc: stable@vger.kernel.org
Fixes: 9da0e4d5Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

The next patch will make x86_set_memory_region fill the
userspace_addr.  Since the struct is not used untouched
anymore, it makes sense to build it in x86_set_memory_region
directly; it also simplifies the callers.
Reported-by: Alexandre DERUMIER <aderumier@odiso.com>
Cc: stable@vger.kernel.org
Fixes: 9da0e4d5Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Unlike shash algorithms, ahash drivers must implement export
and import as their descriptors may contain hardware state and
cannot be exported as is.  Unfortunately some ahash drivers did
not provide them and end up causing crashes with algif_hash.

This patch adds a check to prevent these drivers from registering
ahash algorithms until they are fixed.

Cc: stable@vger.kernel.org
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Now that the NFS server advertises a maximum payload size of 1MB
for RPC/RDMA again, it crashes in svc_process_common() when NFS
client sends a 1MB NFS WRITE on an NFS/RDMA mount.

The server has set up a 259 element array of struct page pointers
in rq_pages[] for each incoming request. The last element of the
array is NULL.

When an incoming request has been completely received,
rdma_read_complete() attempts to set the starting page of the
incoming page vector:

  rqstp->rq_arg.pages = &rqstp->rq_pages[head->hdr_count];

and the page to use for the reply:

  rqstp->rq_respages = &rqstp->rq_arg.pages[page_no];

But the value of page_no has already accounted for head->hdr_count.
Thus rq_respages now points past the end of the incoming pages.

For NFS WRITE operations smaller than the maximum, this is harmless.
But when the NFS WRITE operation is as large as the server's max
payload size, rq_respages now points at the last entry in rq_pages,
which is NULL.

Fixes: cc9a903d ('svcrdma: Change maximum server payload . . .')
BugLink: https://bugzilla.linux-nfs.org/show_bug.cgi?id=270Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Sagi Grimberg <sagig@dev.mellanox.co.il>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Shirley Ma <shirley.ma@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

Nothing too crazy here, a couple of regression fixes + runpm/fbcon
race fix.

* 'linux-4.3' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
  drm/nouveau/bios: fix OF loading
  drm/nouveau/fbcon: take runpm reference when userspace has an open fd
  drm/nouveau/nouveau: Disable AGP for SiS 761
  drm/nouveau/display: allow up to 16k width/height for fermi+
  drm/nouveau/bios: translate devinit pri/sec i2c bus to internal identifiers

Currently OF bios load fails for a few reasons:
 - checksum failure
 - bios size too small
 - no PCIR header
 - bios length not a multiple of 4

In this change, we resolve all of the above by ignoring any checksum
failures (since OF VBIOS tends not to have a checksum), and faking the
PCIR data when loading from OF.
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

We need to do this in order to prevent accesses to the device while it's
powered down.  Userspace may have an mmap of the fb, and there's no good
way (that I know of) to prevent it from touching the device otherwise.

This fixes some nasty races between runpm and plymouth on some systems,
which result in the GPU getting very upset and hanging the boot.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org

SiS 761 chipset does not support AGP cards but has AGP capability (for
the onboard video). At least PC Chips A31G board using this chipset has
an AGP-like AGPro slot that's wired to the PCI bus. Enabling AGP will
fail (GPU lockup and software fbcon, X11 hangs).

Add support for matching just the host bridge in nvkm_device_agp_quirks
and add entry for SiS 761 with mode 0 (AGP disabled).
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

fdo#92013.

Regression from "i2c: transition pad/ports away from being based on nvkm_object"
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

Pull scheduler fix from Thomas Gleixner:
 "Fix a long standing state race in finish_task_switch()"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/core: Fix TASK_DEAD race in finish_task_switch()

Pull perf fix from Thomas Glexiner:
 "Fix build breakage on powerpc in perf tools"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf tools: Fix build break on powerpc due to sample_reg_masks

Pull maintainer email update from Thomas Gleixner:
 "Change Matt Fleming's email address in the maintainers file"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  MAINTAINERS: Change Matt Fleming's email address

Pull irq fixes from Thomas Gleixner:
 "Three trivial commits:

   - Fix a kerneldoc regression

   - Export handle_bad_irq to unbreak a driver in next

   - Add an accessor for the of_node field so refactoring in next does
     not depend on merge ordering"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqdomain: Add an accessor for the of_node field
  genirq: Fix handle_bad_irq kerneldoc comment
  genirq: Export handle_bad_irq

Pull SCSI fixes from James Bottomley:
 "This is a set of three bug fixes, two of which are regressions from
  recent updates (the 3ware one from 4.1 and the device handler fixes
  from 4.2)"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  3w-9xxx: don't unmap bounce buffered commands
  scsi_dh: Use the correct module name when loading device handler
  libiscsi: Fix iscsi_check_transport_timeouts possible infinite loop

Pull md bugfix from Neil Brown:
 "One bug fix for raid1/raid10.

  Very careless bug earler in 4.3-rc, now fixed :-)"

* tag 'md/4.3-rc4-fix' of git://neil.brown.name/md:
  crash in md-raid1 and md-raid10 due to incorrect list manipulation

My Intel email address will soon expire. Replace it with my
personal address so people still know where to send patches.
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1444494136-10333-1-git-send-email-matt@codeblueprint.co.ukSigned-off-by: Ingo Molnar <mingo@kernel.org>

Pull USB fixes from Greg KH:
 "Here are some small USB and PHY fixes and quirk updates for 4.3-rc5.

  Nothing major here, full details in the shortlog, and all of these
  have been in linux-next for a while"

* tag 'usb-4.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: Add device quirk for Logitech PTZ cameras
  USB: chaoskey read offset bug
  USB: Add reset-resume quirk for two Plantronics usb headphones.
  usb: renesas_usbhs: Add support for R-Car H3
  usb: renesas_usbhs: fix build warning if 64-bit architecture
  usb: gadget: bdc: fix memory leak
  phy: berlin-sata: Fix module autoload for OF platform driver
  phy: rockchip-usb: power down phy when rockchip phy probe
  phy: qcom-ufs: fix build error when the component is built as a module

Pull tty/serial driver fixes from Greg KH:
 "Here are a few bug fixes for the tty core that resolve reported
  issues, and some serial driver fixes as well (including the
  much-reported imx driver problem)

  All of these have been in linux-next with no reported problems"

* tag 'tty-4.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  drivers/tty: require read access for controlling terminal
  serial: 8250: add uart_config entry for PORT_RT2880
  tty: fix data race on tty_buffer.commit
  tty: fix data race in tty_buffer_flush
  tty: fix data race in flush_to_ldisc
  tty: fix stall caused by missing memory barrier in drivers/tty/n_tty.c
  serial: atmel: fix error path of probe function
  tty: don't leak cdev in tty_cdev_add()
  Revert "serial: imx: remove unbalanced clk_prepare"

Pull staging fixes from Greg KH:
 "Here are two tiny staging tree fixes for 4.3-rc5.

  One fixes the broken speakup subsystem as reported by a user, and the
  other removes an entry in the MAINTAINERS file for a developer that
  doesn't want to be listed anymore"

* tag 'staging-4.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: speakup: fix speakup-r regression
  MAINTAINERS: Remove myself as nvec co-maintainer

Pull char/misc driver fixes from Greg KH:
 "Here are some small fixes for some misc drivers that resolve some
  reported issues.  All of these have been linux-next for a while"

* tag 'char-misc-4.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  mcb: Fix error handling in mcb_pci_probe()
  mei: hbm: fix error in state check logic
  nvmem: sunxi: Check for memory allocation failure
  nvmem: core: Fix memory leak in nvmem_cell_write
  nvmem: core: Handle shift bits in-place if cell->nbits is non-zero
  nvmem: core: fix the out-of-range leak in read/write()

Pull MIPS fixes from Ralf Baechle:

 - MIPS didn't define the new ioremap_uc.  Defined it as an alias for
   ioremap_uncached.

 - Replace workaround for MIPS16 build issue with a correct one.

* git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: Define ioremap_uc
  MIPS: UAPI: Ignore __arch_swab{16,32,64} when using MIPS16
  Revert "MIPS: UAPI: Fix unrecognized opcode WSBH/DSBH/DSHD when using MIPS16."

Pull swiotlb fixlet from Konrad Rzeszutek Wilk:
 "Enable the SWIOTLB under 32-bit PAE kernels.

  Nowadays most distros enable this due to CONFIG_HYPERVISOR|XEN=y which
  select SWIOTLB.  But for those that are not interested in
  virtualization and wanting to use 32-bit PAE kernels and wanting to
  have working DMA operations - this configures it for them"

* 'stable/for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
  swiotlb: Enable it under x86 PAE

Leandro Awa writes:
 "After switching to version 4.1.6, our parallelized and distributed
  workflows now fail consistently with errors of the form:

  T34: ./regex.c:39:22: error: config.h: No such file or directory

  From our 'git bisect' testing, the following commit appears to be the
  possible cause of the behavior we've been seeing: commit 766c4cbf"

Al Viro says:
 "What happens is that 766c4cbf got the things subtly wrong.

  We used to treat d_is_negative() after lookup_fast() as "fall with
  ENOENT".  That was wrong - checking ->d_flags outside of ->d_seq
  protection is unreliable and failing with hard error on what should've
  fallen back to non-RCU pathname resolution is a bug.

  Unfortunately, we'd pulled the test too far up and ran afoul of
  another kind of staleness.  The dentry might have been absolutely
  stable from the RCU point of view (and we might be on UP, etc), but
  stale from the remote fs point of view.  If ->d_revalidate() returns
  "it's actually stale", dentry gets thrown away and the original code
  wouldn't even have looked at its ->d_flags.

  What we need is to check ->d_flags where 766c4cbf does (prior to
  ->d_seq validation) but only use the result in cases where we do not
  discard this dentry outright"
Reported-by: Leandro Awa <lawa@nvidia.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=104911
Fixes: 766c4cbf ("namei: d_is_negative() should be checked...")
Tested-by: Leandro Awa <lawa@nvidia.com>
Cc: stable@vger.kernel.org # v4.1+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull power management and ACPI fixes from Rafael Wysocki:
 "These are four fixes for bugs in the devfreq and cpufreq subsystems,
  including two regression fixes (one for a recent regression and one
  for a problem introduced in 4.2).

  Specifics:

   - Two fixes for cpufreq regressions, an acpi-cpufreq driver one
     introduced during the 4.2 cycle when we started to preserve cpufreq
     directories for offline CPUs and a general one introduced recently
     (Srinivas Pandruvada).

   - Two devfreq fixes, one for a double kfree() in an error code path
     and one for a confusing sysfs-related failure (Geliang Tang, Tobias
     Jakobi)"

* tag 'pm+acpi-4.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: prevent lockup on reading scaling_available_frequencies
  cpufreq: acpi_cpufreq: prevent crash on reading freqdomain_cpus
  PM / devfreq: fix double kfree
  PM / devfreq: Fix governor_store()

Pull strscpy powerpc fix from Chris Metcalf.

Fix powerpc big-endian build.

* 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  arch/powerpc: provide zero_bytemask() for big-endian

Pull sound fixes from Takashi Iwai:
 "We see various small fixes, but nothing looks too scary, all are small
  gentle bug fixes:

   - Most of changes are for ASoC codecs: Realtek, SGTL5000, TAS2552,
     TLV320, WM8962

   - A couple of dwc and imx-ssi fixes

   - Usual oneliner HD-audio quirks

   - An old emux synth code fix"

* tag 'sound-4.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  MAINTAINERS: Remove wm97xx entry
  ASoC: tas2552: fix dBscale-min declaration
  ALSA: synth: Fix conflicting OSS device registration on AWE32
  ALSA: hda - Disable power_save_node for IDT 92HD73xx chips
  ALSA: hda - Apply SPDIF pin ctl to MacBookPro 12,1
  ALSA: hda: Add dock support for ThinkPad T550
  ASoC: dwc: fix dma stop transferring issue
  ASoC: dwc: correct irq clear method
  ASoC: tlv320aic3x: Prevent writing reserved registers on tlv320aic3104 CODECs
  ASoC: rt5645: Correct the naming and setting of ADC Boost Volume Control
  ASoC: sgtl5000: fix wrong register MIC_BIAS_VOLTAGE setup on probe
  ASoC: wm8962: balance pm_runtime_enable
  ASoC: imx-ssi: Fix DAI hardware signal inversions
  ASoC: sgtl5000: fix error message output for MicBias voltage
  ASoC: db1200: Fix DAI link format for db1300 and db1550