gic_handle_shared_int reads the GIC interrupt pending & mask registers
directly into a bitmap, which is defined as an array of unsigned longs.
The GIC pending registers may be 32 bits wide if the CM is older than
CM3, regardless of the bit width of the CPU, but for MIPS64 kernels
the unsigned longs in the bitmap will be 64 bits wide. In this case we
need to perform 2 x 32 bit reads per 64 bit unsigned long in order to
avoid missing interrupts.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11213/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Make use of the mips_cm_vp_id function to convert from Linux CPU numbers
to the VP IDs used by hardware, which are not identical in all systems.
Without doing so we map interrupts to incorrect VP(E)s.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11212/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The VP ID of a given CPU may not match up with the CPU number used by
Linux. For example, if the width of the VP part of the VP ID is wider
than log2(number of VPs per core) and the system has multiple cores then
this will be the case. Alternatively, if a pre-r6 system implements the
MT ASE with multiple VPEs per core and Linux is built without support
for the MT ASE then the numbers won't match up either. Provide a
function to convert from CPU number to VP ID.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/11211/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

R6 removed the Config4.MMUExtDef field, with the low 16 bits only
allowed to contain FTLB fields, and commit e87569cd ("MIPS:
cpu-probe: Fix VTLB/FTLB configuration for R6") updated the probing of
this field to assume an FTLB is always present for R6.

However the FTLB may still be absent. The presence of those fields is
actually specified by the MMU type in the Config.MT field, so use that
(the new cpu_has_ftlb) to determine whether the FTLB is actually
present.

Fixes: e87569cd ("MIPS: cpu-probe: Fix VTLB/FTLB configuration for R6")
Signed-off-by: NJames Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11160/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Add cpu_has_ftlb, which specifies that an FTLB is present in addition to
the VTLB, probed based on whether Config.MT == 4 (rather than 1 for
standard JTLB).

This is necessary since MIPS release 6 removes Config4.MMUExtDef, so the
presence of the FTLB fields in Config4 must be determined from Config.MT
instead.
Signed-off-by: NJames Hogan <james.hogan@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11159/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The ar7240 misc irq chip use ack handler
instead of ack_mask handler. All new ath79 chips use
the ar7240 misc irq chip
Signed-off-by: NAlexander Couzens <lynxis@fe80.eu>
Acked-by: NAlban Bedel <albeu@free.fr>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: devicetree@vger.kernel.org
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11164/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The irq ack handler was forgotten while introducing OF support.
Only ar71xx and ar933x based devices require it.
Signed-off-by: NAlexander Couzens <lynxis@fe80.eu>
Acked-by: NAlban Bedel <albeu@free.fr>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: devicetree@vger.kernel.org
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11163/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The rotr, seh and wsbh instructions have been introduced with the R2
ISA. Thus the current BPF code fails to build on pre-R2 little endian
CPUs:

    CC      arch/mips/net/bpf_jit.o
    AS      arch/mips/net/bpf_jit_asm.o
  /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S: Assembler messages:
  /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:67: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $8,$19'
  /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:68: Error: opcode not supported on this processor: mips32 (mips32) `rotr $19,$8,16'
  /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:83: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $8,$19'
  /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:84: Error: opcode not supported on this processor: mips32 (mips32) `seh $19,$8'
  /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:151: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $8,$12'
  /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:153: Error: opcode not supported on this processor: mips32 (mips32) `rotr $19,$8,16'
  /home/aurel32/linux-4.2/arch/mips/net/bpf_jit_asm.S:164: Error: opcode not supported on this processor: mips32 (mips32) `wsbh $19,$12'
  /home/aurel32/linux-4.2/scripts/Makefile.build:294: recipe for target 'arch/mips/net/bpf_jit_asm.o' failed

Fix that by providing equivalent code for these CPUs.
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>
Reviewed-by: NMarkos Chandras <markos.chandras@imgtec.com>
Cc: stable@vger.kernel.org # v4.2+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11098/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

On little endian, avoid generating the big endian version of the code
by using #else in addition to #ifdef #endif. Also fix one alignment
issue wrt delay slot.
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>
Reviewed-by: NMarkos Chandras <markos.chandras@imgtec.com>
Cc: stable@vger.kernel.org # v4.2+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11097/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Commit a6335fa1 fixed the case with gap between initrd and next usable PFN zone,
but broken the case when initrd is combined with usable memory into one region
(in add_memory_region()). Restore the fixup initially brought in by f9a7febd.

---- error message ----
Unpacking initramfs...
Initramfs unpacking failed: junk in compressed archive
BUG: Bad page state in process swapper  pfn:00261
page:81004c20 count:0 mapcount:-127 mapping:  (null) index:0x2
flags: 0x0()
page dumped because: nonzero mapcount
CPU: 0 PID: 1 Comm: swapper Not tainted 4.2.0+ #1782
-----------------------
Signed-off-by: NAlexander Sverdlin <alexander.sverdlin@gmail.com>
Reported-by: NTony Wu <tung7970@gmail.com>
Tested-by: NTony Wu <tung7970@gmail.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Joe Perches <joe@perches.com>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: stable@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11086/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Commit 3adeb256 ("MIPS: Loongson: Improve LEFI firmware interface")
made the number of UARTs dynamic if LEFI_FIRMWARE_INTERFACE is configured.
Unfortunately, it did not initialize the number of UARTs if
LEFI_FIRMWARE_INTERFACE is not configured. As a result, the Fulong2e
system has no console.

Fixes: 3adeb256 ("MIPS: Loongson: Improve LEFI firmware interface")
Acked-by: NHuacai Chen <chenhc@lemote.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Tested-by: NMarkos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11076/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Pull ARM fixes from Russell King:
 "Three fixes and a resulting cleanup for -rc2:

   - Andre Przywara reported that he was seeing a warning with the new
     cast inside DMA_ERROR_CODE's definition, and fixed the incorrect
     use.

   - Doug Anderson noticed that kgdb causes a "scheduling while atomic"
     bug.

   - OMAP5 folk noticed that their Thumb-2 compiled X servers crashed
     when enabling support to cover ARMv6 CPUs due to a kernel bug
     leaking some conditional context into the signal handler"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8425/1: kgdb: Don't try to stop the machine when setting breakpoints
  ARM: 8437/1: dma-mapping: fix build warning with new DMA_ERROR_CODE definition
  ARM: get rid of needless #if in signal handling code
  ARM: fix Thumb2 signal handling when ARMv6 is enabled

Merge tag 'linux-kselftest-4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest fixes from Shuah Khan:
 "This update contains 7 fixes for problems ranging from build failurs
  to incorrect error reporting"

* tag 'linux-kselftest-4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests: exec: revert to default emit rule
  selftests: change install command to rsync
  selftests: mqueue: simplify the Makefile
  selftests: mqueue: allow extra cflags
  selftests: rename jump label to static_keys
  selftests/seccomp: add support for s390
  seltests/zram: fix syntax error

Pull power management and ACPI updates from Rafael Wysocki:
 "Included are: a somewhat late devfreq update which however is mostly
  fixes and cleanups with one new thing only (the PPMUv2 support on
  Exynos5433), an ACPI cpufreq driver fixup and two ACPI core cleanups
  related to preprocessor directives.

  Specifics:

   - Fix a memory allocation size in the devfreq core (Xiaolong Ye).

   - Fix a mistake in the exynos-ppmu DT binding (Javier Martinez
     Canillas).

   - Add support for PPMUv2 ((Platform Performance Monitoring Unit
     version 2.0) on the Exynos5433 SoCs (Chanwoo Choi).

   - Fix a type casting bug in the Exynos PPMU code (MyungJoo Ham).

   - Assorted devfreq code cleanups and optimizations (Javi Merino,
     MyungJoo Ham, Viresh Kumar).

   - Fix up the ACPI cpufreq driver to use a more lightweight way to get
     to its private data in the ->get() callback (Rafael J Wysocki).

   - Fix a CONFIG_ prefix bug in one of the ACPI drivers and make the
     ACPI subsystem use IS_ENABLED() instead of #ifdefs in function
     bodies (Sudeep Holla)"

* tag 'pm+acpi-4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: acpi-cpufreq: Use cpufreq_cpu_get_raw() in ->get()
  ACPI: Eliminate CONFIG_.*{, _MODULE} #ifdef in favor of IS_ENABLED()
  ACPI: int340x_thermal: add missing CONFIG_ prefix
  PM / devfreq: Fix incorrect type issue.
  PM / devfreq: tegra: Update governor to use devfreq_update_stats()
  PM / devfreq: comments for get_dev_status usage updated
  PM / devfreq: drop comment about thermal setting max_freq
  PM / devfreq: cache the last call to get_dev_status()
  PM / devfreq: Drop unlikely before IS_ERR(_OR_NULL)
  PM / devfreq: exynos-ppmu: bit-wise operation bugfix.
  PM / devfreq: exynos-ppmu: Update documentation to support PPMUv2
  PM / devfreq: exynos-ppmu: Add the support of PPMUv2 for Exynos5433
  PM / devfreq: event: Remove incorrect property in exynos-ppmu DT binding

Pull clk fixes from Stephen Boyd:
 "A few driver fixes for tegra, rockchip, and st SoCs and a two-liner in
  the framework to avoid oops when get_parent ops return out of range
  values on tegra platforms"

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  drivers: clk: st: Rename st_pll3200c32_407_c0_x into st_pll3200c32_cx_x
  clk: check for invalid parent index of orphans in __clk_init()
  clk: tegra: dfll: Properly protect OPP list
  clk: rockchip: add critical clock for rk3368

Merge tag 'led-fixes-for-v4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds

Pull LED fixes from Jacek Anaszewski:
 - fix module autoload for six OF platform drivers (aat1290, bcm6328,
   bcm6358, ktd2692, max77693, ns2)
 - aat1290: add missing static modifier
 - ipaq-micro: add missing LEDS_CLASS dependency
 - lp55xx: correct Kconfig dependecy for f/w user helper

* tag 'led-fixes-for-v4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
  leds:lp55xx: Correct Kconfig dependency for f/w user helper
  leds: leds-ipaq-micro: Add LEDS_CLASS dependency
  leds: aat1290: add 'static' modifier to init_mm_current_scale
  leds: leds-ns2: Fix module autoload for OF platform driver
  leds: max77693: Fix module autoload for OF platform driver
  leds: ktd2692: Fix module autoload for OF platform driver
  leds: bcm6358: Fix module autoload for OF platform driver
  leds: bcm6328: Fix module autoload for OF platform driver
  leds: aat1290: Fix module autoload for OF platform driver

Pull rdma fixes from Doug Ledford:
 "The new hfi1 driver in staging/rdma has had a number of fixup patches
  since being added to the tree.  This is the first batch of those fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  IB/hfi: Properly set permissions for user device files
  IB/hfi1: mask vs shift confusion
  IB/hfi1: clean up some defines
  IB/hfi1: info leak in get_ctxt_info()
  IB/hfi1: fix a locking bug
  IB/hfi1: checking for NULL instead of IS_ERR
  IB/hfi1: fix sdma_descq_cnt parameter parsing
  IB/hfi1: fix copy_to/from_user() error handling
  IB/hfi1: fix pstateinfo from returning improperly byteswapped value

Pull libnvdimm fixes from Dan Williams:

 - a boot regression (since v4.2) fix for some ARM configurations from
   Tyler

 - regression (since v4.1) fixes for mkfs.xfs on a DAX enabled device
   from Jeff.  These are tagged for -stable.

 - a pair of locking fixes from Axel that are hidden from lockdep since
   they involve device_lock().  The "btt" one is tagged for -stable, the
   other only applies to the new "pfn" mechanism in v4.3.

 - a fix for the pmem ->rw_page() path to use wmb_pmem() from Ross.

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  mm: fix type cast in __pfn_to_phys()
  pmem: add proper fencing to pmem_rw_page()
  libnvdimm: pfn_devs: Fix locking in namespace_store
  libnvdimm: btt_devs: Fix locking in namespace_store
  blockdev: don't set S_DAX for misaligned partitions
  dax: fix O_DIRECT I/O to the last block of a blockdev

Pull block updates from Jens Axboe:
 "This is a bit bigger than it should be, but I could (did) not want to
  send it off last week due to both wanting extra testing, and expecting
  a fix for the bounce regression as well.  In any case, this contains:

   - Fix for the blk-merge.c compilation warning on gcc 5.x from me.

   - A set of back/front SG gap merge fixes, from me and from Sagi.
     This ensures that we honor SG gapping for integrity payloads as
     well.

   - Two small fixes for null_blk from Matias, fixing a leak and a
     capacity propagation issue.

   - A blkcg fix from Tejun, fixing a NULL dereference.

   - A fast clone optimization from Ming, fixing a performance
     regression since the arbitrarily sized bio's were introduced.

   - Also from Ming, a regression fix for bouncing IOs"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: fix bounce_end_io
  block: blk-merge: fast-clone bio when splitting rw bios
  block: blkg_destroy_all() should clear q->root_blkg and ->root_rl.blkg
  block: Copy a user iovec if it includes gaps
  block: Refuse adding appending a gapped integrity page to a bio
  block: Refuse request/bio merges with gaps in the integrity payload
  block: Check for gaps on front and back merges
  null_blk: fix wrong capacity when bs is not 512 bytes
  null_blk: fix memory leak on cleanup
  block: fix bogus compiler warnings in blk-merge.c

Commit 505a666e ("writeback: plug writeback in wb_writeback() and
writeback_inodes_wb()") has us holding a plug during writeback_sb_inodes,
which increases the merge rate when relatively contiguous small files
are written by the filesystem.  It helps both on flash and spindles.

For an fs_mark workload creating 4K files in parallel across 8 drives,
this commit improves performance ~9% more by unplugging before calling
cond_resched().  cond_resched() doesn't trigger an implicit unplug, so
explicitly getting the IO down to the device before scheduling reduces
latencies for anyone waiting on clean pages.

It also cuts down on how often we use kblockd to unplug, which means
less work bouncing from one workqueue to another.

Many more details about how we got here:

  https://lkml.org/lkml/2015/9/11/570Signed-off-by: NChris Mason <clm@fb.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The various definitions of __pfn_to_phys() have been consolidated to
use a generic macro in include/asm-generic/memory_model.h. This hit
mainline in the form of 012dcef3 "mm: move __phys_to_pfn and
__pfn_to_phys to asm/generic/memory_model.h". When the generic macro
was implemented the type cast to phys_addr_t was dropped which caused
boot regressions on ARM platforms with more than 4GB of memory and
LPAE enabled.

It was suggested to use PFN_PHYS() defined in include/linux/pfn.h
as provides the correct logic and avoids further duplication.
Reported-by: Nkernelci.org bot <bot@kernelci.org>
Suggested-by: NDan Williams <dan.j.williams@intel.com>
Signed-off-by: NTyler Baker <tyler.baker@linaro.org>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>

* acpi-bus:
  ACPI: Eliminate CONFIG_.*{, _MODULE} #ifdef in favor of IS_ENABLED()
  ACPI: int340x_thermal: add missing CONFIG_ prefix

* pm-cpufreq:
  cpufreq: acpi-cpufreq: Use cpufreq_cpu_get_raw() in ->get()

* pm-devfreq:
  PM / devfreq: Fix incorrect type issue.
  PM / devfreq: tegra: Update governor to use devfreq_update_stats()
  PM / devfreq: comments for get_dev_status usage updated
  PM / devfreq: drop comment about thermal setting max_freq
  PM / devfreq: cache the last call to get_dev_status()
  PM / devfreq: Drop unlikely before IS_ERR(_OR_NULL)
  PM / devfreq: exynos-ppmu: bit-wise operation bugfix.
  PM / devfreq: exynos-ppmu: Update documentation to support PPMUv2
  PM / devfreq: exynos-ppmu: Add the support of PPMUv2 for Exynos5433
  PM / devfreq: event: Remove incorrect property in exynos-ppmu DT binding

Pull virtio fixes and cleanups from Michael Tsirkin:
 "This fixes the virtio-test tool, and improves the error handling for
  virtio-ccw"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio/s390: handle failures of READ_VQ_CONF ccw
  tools/virtio: propagate V=X to kernel build
  vhost: move features to core
  tools/virtio: fix build after 4.2 changes

Pull KVM fixes from Paolo Bonzini:
 "Mostly stable material, a lot of ARM fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (22 commits)
  sched: access local runqueue directly in single_task_running
  arm/arm64: KVM: Remove 'config KVM_ARM_MAX_VCPUS'
  arm64: KVM: Remove all traces of the ThumbEE registers
  arm: KVM: Disable virtual timer even if the guest is not using it
  arm64: KVM: Disable virtual timer even if the guest is not using it
  arm/arm64: KVM: vgic: Check for !irqchip_in_kernel() when mapping resources
  KVM: s390: Replace incorrect atomic_or with atomic_andnot
  arm: KVM: Fix incorrect device to IPA mapping
  arm64: KVM: Fix user access for debug registers
  KVM: vmx: fix VPID is 0000H in non-root operation
  KVM: add halt_attempted_poll to VCPU stats
  kvm: fix zero length mmio searching
  kvm: fix double free for fast mmio eventfd
  kvm: factor out core eventfd assign/deassign logic
  kvm: don't try to register to KVM_FAST_MMIO_BUS for non mmio eventfd
  KVM: make the declaration of functions within 80 characters
  KVM: arm64: add workaround for Cortex-A57 erratum #852523
  KVM: fix polling for guest halt continued even if disable it
  arm/arm64: KVM: Fix PSCI affinity info return value for non valid cores
  arm64: KVM: set {v,}TCR_EL2 RES1 bits
  ...

Some of the device files are required to be user accessible for PSM while
most should remain accessible only by root.

Add a parameter to hfi1_cdev_init which controls if the user should have access
to this device which places it in a different class with the appropriate
devnode callback.

In addition set the devnode call back for the existing class to be a bit more
explicit for those permissions.

Finally remove the unnecessary null check before class_destroy
Tested-by: NDonald Dutile <ddutile@redhat.com>
Signed-off-by: Haralanov, Mitko (mitko.haralanov@intel.com)
Signed-off-by: NIra Weiny <ira.weiny@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

We are shifting by the _MASK macros instead of the _SHIFT ones.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

I added spaces around operators so it matches kernel style because
normally "-1ULL" is a number and " - 1" is a subtract operation.  Also
removed some superflous "ULL" types so "1ULL" becomes "1".
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

The cinfo struct has a hole after the last struct member so we need to
zero it out.  Otherwise we disclose some uninitialized stack data.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

mutex_trylock() returns zero on failure, not EBUSY.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

__get_txreq() returns an ERR_PTR() but this checks for NULL so it would
oops on failure.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

The boolean tests should have been or-ed.
Reported-by: NDavid Binderman <dcb314@hotmail.com>
Reviewed-by: NJubin John <jubin.john@intel.com>
Signed-off-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

copy_to/from_user() returns the number of bytes which we were not able
to copy.  It doesn't return an error code.

Also a couple places had a printk() on error and I removed that because
people can take advantage of it to fill /var/log/messages with spam.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Byteswap link_width_downgrade_*_active values before sending on the wire.  In
addition properly define the Port State Info structure.
Reviewed-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: NChristian Gomez <christian.gomez@intel.com>
Signed-off-by: NRimmer, Todd <todd.rimmer@intel.com>
Signed-off-by: NIra Weiny <ira.weiny@intel.com>
Acked-by: NMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

Pull irq updates from Thomas Gleixner:
 "This is a rather large update post rc1 due to the final steps of
  cleanups and API changes which had to wait for the preparatory patches
  to hit your tree.

   - Regression fixes for ARM GIC irqchips

   - Regression fixes and lockdep anotations for renesas irq chips

   - The leftovers of the cleanup and preparatory patches which have
     been ignored by maintainers

   - Final conversions of the newly merged users of obsolete APIs

   - Final removal of obsolete APIs

   - Final removal of ARM artifacts which had been introduced during the
     conversion of ARM to the generic interrupt code.

   - Final split of the irq_data into chip specific and common data to
     reflect the needs of hierarchical irq domains.

   - Treewide removal of the first argument of interrupt flow handlers,
     i.e. the irq number, which is not used by the majority of handlers
     and simple to retrieve from the other argument the irq descriptor.

   - A few comment updates and build warning fixes"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits)
  arm64: Remove ununsed set_irq_flags
  ARM: Remove ununsed set_irq_flags
  sh: Kill off set_irq_flags usage
  irqchip: Kill off set_irq_flags usage
  gpu/drm: Kill off set_irq_flags usage
  genirq: Remove irq argument from irq flow handlers
  genirq: Move field 'msi_desc' from irq_data into irq_common_data
  genirq: Move field 'affinity' from irq_data into irq_common_data
  genirq: Move field 'handler_data' from irq_data into irq_common_data
  genirq: Move field 'node' from irq_data into irq_common_data
  irqchip/gic-v3: Use IRQD_FORWARDED_TO_VCPU flag
  irqchip/gic: Use IRQD_FORWARDED_TO_VCPU flag
  genirq: Provide IRQD_FORWARDED_TO_VCPU status flag
  genirq: Simplify irq_data_to_desc()
  genirq: Remove __irq_set_handler_locked()
  pinctrl/pistachio: Use irq_set_handler_locked
  gpio: vf610: Use irq_set_handler_locked
  powerpc/mpc8xx: Use irq_set_handler_locked()
  powerpc/ipic: Use irq_set_handler_locked()
  powerpc/cpm2: Use irq_set_handler_locked()
  ...

Pull x86 fix from Thomas Gleixner:
 "A single regression fix for the x86 dma allocator which got wreckaged
  in the merge window"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/pci/dma: Fix gfp flags for coherent DMA memory allocation

Pull powerpc fixes from Michael Ellerman:

 - Fix 32-bit TCE table init in kdump kernel from Nish

 - Fix kdump with non-power-of-2 crashkernel= from Nish

 - Abort cxl_pci_enable_device_hook() if PCI channel is offline from
   Andrew

 - Fix to release DRC when configure_connector() fails from Bharata

 - Wire up sys_userfaultfd()

 - Fix race condition in tearing down MSI interrupts from Paul

 - Fix unbalanced pci_dev_get() in cxl_probe() from Daniel

 - Fix cxl build failure due to -Wunused-variable gcc behaviour change
   from Ian

 - Tell the toolchain to use ABI v2 when building an LE boot wrapper
   from Benh

 - Fix THP to recompute hash value after a failed update from Aneesh

 - 32-bit memcpy/memset: only use dcbz once cache is enabled from
   Christophe

* tag 'powerpc-4.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc32: memset: only use dcbz once cache is enabled
  powerpc32: memcpy: only use dcbz once cache is enabled
  powerpc/mm: Recompute hash value after a failed update
  powerpc/boot: Specify ABI v2 when building an LE boot wrapper
  cxl: Fix build failure due to -Wunused-variable behaviour change
  cxl: Fix unbalanced pci_dev_get in cxl_probe
  powerpc/MSI: Fix race condition in tearing down MSI interrupts
  powerpc: Wire up sys_userfaultfd()
  powerpc/pseries: Release DRC when configure_connector fails
  cxl: abort cxl_pci_enable_device_hook() if PCI channel is offline
  powerpc/powernv/pci-ioda: fix kdump with non-power-of-2 crashkernel=
  powerpc/powernv/pci-ioda: fix 32-bit TCE table init in kdump kernel

Commit 2ee507c4 ("sched: Add function single_task_running to let a task
check if it is the only task running on a cpu") referenced the current
runqueue with the smp_processor_id.  When CONFIG_DEBUG_PREEMPT is enabled,
that is only allowed if preemption is disabled or the currrent task is
bound to the local cpu (e.g. kernel worker).

With commit f7819512 ("kvm: add halt_poll_ns module parameter") KVM
calls single_task_running. If CONFIG_DEBUG_PREEMPT is enabled that
generates a lot of kernel messages.

To avoid adding preemption in that cases, as it would limit the usefulness,
we change single_task_running to access directly the cpu local runqueue.

Cc: Tim Chen <tim.c.chen@linux.intel.com>
Suggested-by: NPeter Zijlstra <peterz@infradead.org>
Acked-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Fixes: 2ee507c4Signed-off-by: NDominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Merge tag 'platform-drivers-x86-v4.3-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86

Pull x86 platform driver fixes from Darren Hart:
 "Fix an issue introduced by the previous major toshiba rework.  Add a
  quirk.  Workaround a few platform specific firmware items.  One
  cleanup to wmi I inadvertently dropped from a previous pull request.

  Details:

  hp-wmi:
   - limit hotkey enable

  toshiba_acpi:
   - Fix hotkeys registration on some toshiba models
   - Fix USB Sleep and Music always disabled

  wmi:
   - Remove private %pUL implementation

  asus-nb-wmi:
   - Add wapf=4 quirk for X456UA/X456UF"

* tag 'platform-drivers-x86-v4.3-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
  hp-wmi: limit hotkey enable
  toshiba_acpi: Fix hotkeys registration on some toshiba models
  toshiba_acpi: Fix USB Sleep and Music always disabled
  wmi: Remove private %pUL implementation
  asus-nb-wmi: Add wapf=4 quirk for X456UA/X456UF