Commit Graph

85605 Commits

Author SHA1 Message Date
Linus Torvalds
329f415291 KVM locks kvm_device list to prevent corruption on device creation.
PPC splits debugfs initialization from creation of the xics device to
 unlock the newly taken kvm lock earlier.
 
 s390 prevents userspace from triggering two WARN_ON_ONCE.
 
 MIPS fixes several issues in the management of TLB faults (Cc: stable).
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fixes from Radim Krčmář:
 "KVM:
   - lock kvm_device list to prevent corruption on device creation.

  PPC:
   - split debugfs initialization from creation of the xics device to
     unlock the newly taken kvm lock earlier.

  s390:
   - prevent userspace from triggering two WARN_ON_ONCE.

  MIPS:
   - fix several issues in the management of TLB faults (Cc: stable)"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  MIPS: KVM: Propagate kseg0/mapped tlb fault errors
  MIPS: KVM: Fix gfn range check in kseg0 tlb faults
  MIPS: KVM: Add missing gfn range check
  MIPS: KVM: Fix mapped fault broken commpage handling
  KVM: Protect device ops->create and list_add with kvm->lock
  KVM: PPC: Move xics_debugfs_init out of create
  KVM: s390: reset KVM_REQ_MMU_RELOAD if mapping the prefix failed
  KVM: s390: set the prefix initially properly
2016-08-13 10:11:14 -07:00
Linus Torvalds
a1e210331b Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:

 - an NVMe fix from Gabriel, fixing a suspend/resume issue on some
   setups

 - addition of a few missing entries in the block queue sysfs
   documentation, from Joe

 - a fix for a sparse shadow warning for the bvec iterator, from
   Johannes

 - a writeback deadlock involving raid issuing barriers, and not
   flushing the plug when we wakeup the flusher threads.  From
   Konstantin

 - a set of patches for the NVMe target/loop/rdma code, from Roland and
   Sagi

* 'for-linus' of git://git.kernel.dk/linux-block:
  bvec: avoid variable shadowing warning
  doc: update block/queue-sysfs.txt entries
  nvme: Suspend all queues before deletion
  mm, writeback: flush plugged IO in wakeup_flusher_threads()
  nvme-rdma: Remove unused includes
  nvme-rdma: start async event handler after reconnecting to a controller
  nvmet: Fix controller serial number inconsistency
  nvmet-rdma: Don't use the inline buffer in order to avoid allocation for small reads
  nvmet-rdma: Correctly handle RDMA device hot removal
  nvme-rdma: Make sure to shutdown the controller if we can
  nvme-loop: Remove duplicate call to nvme_remove_namespaces
  nvme-rdma: Free the I/O tags when we delete the controller
  nvme-rdma: Remove duplicate call to nvme_remove_namespaces
  nvme-rdma: Fix device removal handling
  nvme-rdma: Queue ns scanning after a sucessful reconnection
  nvme-rdma: Don't leak uninitialized memory in connect request private data
2016-08-13 09:56:45 -07:00
Linus Torvalds
ad83242a8f Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
 "Mostly tooling fixes, plus two uncore-PMU fixes, an uprobes fix, a
  perf-cgroups fix and an AUX events fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/uncore: Add enable_box for client MSR uncore
  perf/x86/intel/uncore: Fix uncore num_counters
  uprobes/x86: Fix RIP-relative handling of EVEX-encoded instructions
  perf/core: Set cgroup in CPU contexts for new cgroup events
  perf/core: Fix sideband list-iteration vs. event ordering NULL pointer deference crash
  perf probe ppc64le: Fix probe location when using DWARF
  perf probe: Add function to post process kernel trace events
  tools: Sync cpufeatures headers with the kernel
  toops: Sync tools/include/uapi/linux/bpf.h with the kernel
  tools: Sync cpufeatures.h and vmx.h with the kernel
  perf probe: Support signedness casting
  perf stat: Avoid skew when reading events
  perf probe: Fix module name matching
  perf probe: Adjust map->reloc offset when finding kernel symbol from map
  perf hists: Trim libtraceevent trace_seq buffers
  perf script: Add 'bpf-output' field to usage message
2016-08-12 13:21:18 -07:00
Linus Torvalds
1f8083c640 Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Ingo Molnar:
 "Misc fixes: lockstat fix, futex fix on !MMU systems, big endian fix
  for qrwlocks and a race fix for pvqspinlocks"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/pvqspinlock: Fix a bug in qstat_read()
  locking/pvqspinlock: Fix double hash race
  locking/qrwlock: Fix write unlock bug on big endian systems
  futex: Assume all mappings are private on !MMU systems
2016-08-12 12:46:37 -07:00
Linus Torvalds
25db69188e Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fix from Ingo Molnar:
 "A fix for an MSI regression"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq/msi: Make sure PCI MSIs are activated early
2016-08-12 12:41:51 -07:00
Linus Torvalds
9909170065 NFS client bugfixes for Linux 4.8
Highlights include:
 
 - Stable patch from Olga to fix RPCSEC_GSS upcalls when the same user needs
   multiple different security services (e.g. krb5i and krb5p).
 - Stable patch to fix a regression introduced by the use of SO_REUSEPORT,
   and that prevented the use of multiple different NFS versions to the
   same server.
 - TCP socket reconnection timer fixes.
 - Patch from Neil to disable the use of IPv6 temporary addresses.
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Merge tag 'nfs-for-4.8-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

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

   - Stable patch from Olga to fix RPCSEC_GSS upcalls when the same user
     needs multiple different security services (e.g.  krb5i and krb5p).

   - Stable patch to fix a regression introduced by the use of
     SO_REUSEPORT, and that prevented the use of multiple different NFS
     versions to the same server.

   - TCP socket reconnection timer fixes.

   - Patch from Neil to disable the use of IPv6 temporary addresses"

* tag 'nfs-for-4.8-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4: Cap the transport reconnection timer at 1/2 lease period
  NFSv4: Cleanup the setting of the nfs4 lease period
  SUNRPC: Limit the reconnect backoff timer to the max RPC message timeout
  SUNRPC: Fix reconnection timeouts
  NFSv4.2: LAYOUTSTATS may return NFS4ERR_ADMIN/DELEG_REVOKED
  SUNRPC: disable the use of IPv6 temporary addresses.
  SUNRPC: allow for upcalls for same uid but different gss service
  SUNRPC: Fix up socket autodisconnect
  SUNRPC: Handle EADDRNOTAVAIL on connection failures
2016-08-12 12:32:24 -07:00
Linus Torvalds
8766dc68d1 powerpc fixes for 4.8 #3
- powerpc/vdso: Fix build rules to rebuild vdsos correctly from Nicholas Piggin
  - powerpc/ptrace: Fix coredump since ptrace TM changes from Cyril Bur
  - powerpc/32: Fix csum_partial_copy_generic() from Christophe Leroy
  - cxl: Set psl_fir_cntl to production environment value from Frederic Barrat
  - powerpc/eeh: Switch to conventional PCI address output in EEH log from Guilherme G. Piccoli
  - cxl: Use fixed width predefined types in data structure. from Philippe Bergheaud
  - powerpc/vdso: Add missing include file from Guenter Roeck
  - powerpc: Fix unused function warning 'lmb_to_memblock' from Alastair D'Silva
  - powerpc/powernv/ioda: Fix TCE invalidate to work in real mode again from Alexey Kardashevskiy
  - powerpc/cell: Add missing error code in spufs_mkgang() from Dan Carpenter
  - crypto: crc32c-vpmsum - Convert to CPU feature based module autoloading from Anton Blanchard
  - powerpc/pasemi: Fix coherent_dma_mask for dma engine from Darren Stevens
 
 Benjamin Herrenschmidt:
  - powerpc/32: Fix crash during static key init
  - powerpc: Update obsolete comment in setup_32.c about early_init()
  - powerpc: Print the kernel load address at the end of prom_init()
  - powerpc/pnv/pci: Fix incorrect PE reservation attempt on some 64-bit BARs
  - powerpc/xics: Properly set Edge/Level type and enable resend
 
 Mahesh Salgaonkar:
  - powerpc/book3s: Fix MCE console messages for unrecoverable MCE.
  - powerpc/powernv: Fix MCE handler to avoid trashing CR0/CR1 registers.
  - powerpc/powernv: Move IDLE_STATE_ENTER_SEQ macro to cpuidle.h
  - powerpc/powernv: Load correct TOC pointer while waking up from winkle.
 
 Andrew Donnellan:
  - cxl: Fix sparse warnings
  - cxl: Fix NULL dereference in cxl_context_init() on PowerVM guests
 
 Michael Ellerman:
  - selftests/powerpc: Specify we expect to build with std=gnu99
  - powerpc/Makefile: Use cflags-y/aflags-y for setting endian options
  - powerpc/pci: Fix endian bug in fixed PHB numbering
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Merge tag 'powerpc-4.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Some powerpc fixes for 4.8:

  Misc:
   - powerpc/vdso: Fix build rules to rebuild vdsos correctly from Nicholas Piggin
   - powerpc/ptrace: Fix coredump since ptrace TM changes from Cyril Bur
   - powerpc/32: Fix csum_partial_copy_generic() from Christophe Leroy
   - cxl: Set psl_fir_cntl to production environment value from Frederic Barrat
   - powerpc/eeh: Switch to conventional PCI address output in EEH log from Guilherme G. Piccoli
   - cxl: Use fixed width predefined types in data structure. from Philippe Bergheaud
   - powerpc/vdso: Add missing include file from Guenter Roeck
   - powerpc: Fix unused function warning 'lmb_to_memblock' from Alastair D'Silva
   - powerpc/powernv/ioda: Fix TCE invalidate to work in real mode again from Alexey Kardashevskiy
   - powerpc/cell: Add missing error code in spufs_mkgang() from Dan Carpenter
   - crypto: crc32c-vpmsum - Convert to CPU feature based module autoloading from Anton Blanchard
   - powerpc/pasemi: Fix coherent_dma_mask for dma engine from Darren Stevens

  Benjamin Herrenschmidt:
   - powerpc/32: Fix crash during static key init
   - powerpc: Update obsolete comment in setup_32.c about early_init()
   - powerpc: Print the kernel load address at the end of prom_init()
   - powerpc/pnv/pci: Fix incorrect PE reservation attempt on some 64-bit BARs
   - powerpc/xics: Properly set Edge/Level type and enable resend

  Mahesh Salgaonkar:
   - powerpc/book3s: Fix MCE console messages for unrecoverable MCE.
   - powerpc/powernv: Fix MCE handler to avoid trashing CR0/CR1 registers.
   - powerpc/powernv: Move IDLE_STATE_ENTER_SEQ macro to cpuidle.h
   - powerpc/powernv: Load correct TOC pointer while waking up from winkle.

  Andrew Donnellan:
   - cxl: Fix sparse warnings
   - cxl: Fix NULL dereference in cxl_context_init() on PowerVM guests

  Michael Ellerman:
   - selftests/powerpc: Specify we expect to build with std=gnu99
   - powerpc/Makefile: Use cflags-y/aflags-y for setting endian options
   - powerpc/pci: Fix endian bug in fixed PHB numbering"

* tag 'powerpc-4.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (26 commits)
  selftests/powerpc: Specify we expect to build with std=gnu99
  powerpc/vdso: Fix build rules to rebuild vdsos correctly
  powerpc/Makefile: Use cflags-y/aflags-y for setting endian options
  powerpc/32: Fix crash during static key init
  powerpc: Update obsolete comment in setup_32.c about early_init()
  powerpc: Print the kernel load address at the end of prom_init()
  powerpc/ptrace: Fix coredump since ptrace TM changes
  powerpc/32: Fix csum_partial_copy_generic()
  cxl: Set psl_fir_cntl to production environment value
  powerpc/pnv/pci: Fix incorrect PE reservation attempt on some 64-bit BARs
  powerpc/book3s: Fix MCE console messages for unrecoverable MCE.
  powerpc/pci: Fix endian bug in fixed PHB numbering
  powerpc/eeh: Switch to conventional PCI address output in EEH log
  cxl: Fix sparse warnings
  cxl: Fix NULL dereference in cxl_context_init() on PowerVM guests
  cxl: Use fixed width predefined types in data structure.
  powerpc/vdso: Add missing include file
  powerpc: Fix unused function warning 'lmb_to_memblock'
  powerpc/powernv: Fix MCE handler to avoid trashing CR0/CR1 registers.
  powerpc/powernv: Move IDLE_STATE_ENTER_SEQ macro to cpuidle.h
  ...
2016-08-12 12:09:44 -07:00
Christoffer Dall
a28ebea2ad KVM: Protect device ops->create and list_add with kvm->lock
KVM devices were manipulating list data structures without any form of
synchronization, and some implementations of the create operations also
suffered from a lack of synchronization.

Now when we've split the xics create operation into create and init, we
can hold the kvm->lock mutex while calling the create operation and when
manipulating the devices list.

The error path in the generic code gets slightly ugly because we have to
take the mutex again and delete the device from the list, but holding
the mutex during anon_inode_getfd or releasing/locking the mutex in the
common non-error path seemed wrong.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2016-08-12 12:01:27 +02:00
Christoffer Dall
023e9fddc3 KVM: PPC: Move xics_debugfs_init out of create
As we are about to hold the kvm->lock during the create operation on KVM
devices, we should move the call to xics_debugfs_init into its own
function, since holding a mutex over extended amounts of time might not
be a good idea.

Introduce an init operation on the kvm_device_ops struct which cannot
fail and call this, if configured, after the device has been created.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2016-08-12 12:01:26 +02:00
Linus Torvalds
6da7e95326 virtio/vhost: fixes and cleanups for 4.8
- Misc fixes and cleanups all over the place.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio/vhost fixes and cleanups from Michael Tsirkin:
 "Misc fixes and cleanups all over the place"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio/s390: deprecate old transport
  virtio/s390: keep early_put_chars
  virtio_blk: Fix a slient kernel panic
  virtio-vsock: fix include guard typo
  vhost/vsock: fix vhost virtio_vsock_pkt use-after-free
  9p/trans_virtio: use kvfree() for iov_iter_get_pages_alloc()
  virtio: fix error handling for debug builds
  virtio: fix memory leak in virtqueue_add()
2016-08-11 14:10:23 -07:00
Johannes Berg
1ea049b2de bvec: avoid variable shadowing warning
Due to the (indirect) nesting of min(..., min(...)), sparse will
show a variable shadowing warning whenever bvec.h is included.

Avoid that by assigning the inner min() to a temporary variable first.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-11 09:41:35 -06:00
pan xinhui
2db34e8bf9 locking/qrwlock: Fix write unlock bug on big endian systems
This patch aims to get rid of endianness in queued_write_unlock(). We
want to set  __qrwlock->wmode to NULL, however the address is not
&lock->cnts in big endian machine. That causes queued_write_unlock()
write NULL to the wrong field of __qrwlock.

So implement __qrwlock_write_byte() which returns the correct
__qrwlock->wmode address.

Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman.Long@hpe.com
Cc: arnd@arndb.de
Cc: boqun.feng@gmail.com
Cc: will.deacon@arm.com
Link: http://lkml.kernel.org/r/1468835259-4486-1-git-send-email-xinhui.pan@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-08-10 14:13:27 +02:00
David Carrillo-Cisneros
db4a835601 perf/core: Set cgroup in CPU contexts for new cgroup events
There's a perf stat bug easy to observer on a machine with only one cgroup:

  $ perf stat -e cycles -I 1000 -C 0 -G /
  #          time             counts unit events
      1.000161699      <not counted>      cycles                    /
      2.000355591      <not counted>      cycles                    /
      3.000565154      <not counted>      cycles                    /
      4.000951350      <not counted>      cycles                    /

We'd expect some output there.

The underlying problem is that there is an optimization in
perf_cgroup_sched_{in,out}() that skips the switch of cgroup events
if the old and new cgroups in a task switch are the same.

This optimization interacts with the current code in two ways
that cause a CPU context's cgroup (cpuctx->cgrp) to be NULL even if a
cgroup event matches the current task. These are:

  1. On creation of the first cgroup event in a CPU: In current code,
  cpuctx->cpu is only set in perf_cgroup_sched_in, but due to the
  aforesaid optimization, perf_cgroup_sched_in will run until the next
  cgroup switches in that CPU. This may happen late or never happen,
  depending on system's number of cgroups, CPU load, etc.

  2. On deletion of the last cgroup event in a cpuctx: In list_del_event,
  cpuctx->cgrp is set NULL. Any new cgroup event will not be sched in
  because cpuctx->cgrp == NULL until a cgroup switch occurs and
  perf_cgroup_sched_in is executed (updating cpuctx->cgrp).

This patch fixes both problems by setting cpuctx->cgrp in list_add_event,
mirroring what list_del_event does when removing a cgroup event from CPU
context, as introduced in:

  commit 68cacd2916 ("perf_events: Fix stale ->cgrp pointer in update_cgrp_time_from_cpuctx()")

With this patch, cpuctx->cgrp is always set/clear when installing/removing
the first/last cgroup event in/from the CPU context. With cpuctx->cgrp
correctly set, event_filter_match works as intended when events are
sched in/out.

After the fix, the output is as expected:

  $ perf stat -e cycles -I 1000 -a -G /
  #         time             counts unit events
     1.004699159          627342882      cycles                    /
     2.007397156          615272690      cycles                    /
     3.010019057          616726074      cycles                    /

Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Turner <pjt@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/1470124092-113192-1-git-send-email-davidcc@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-08-10 13:05:52 +02:00
Linus Torvalds
a0cba2179e Revert "printk: create pr_<level> functions"
This reverts commit 874f9c7da9.

Geert Uytterhoeven reports:
 "This change seems to have an (unintendent?) side-effect.

  Before, pr_*() calls without a trailing newline characters would be
  printed with a newline character appended, both on the console and in
  the output of the dmesg command.

  After this commit, no new line character is appended, and the output
  of the next pr_*() call of the same type may be appended, like in:

    - Truncating RAM at 0x0000000040000000-0x00000000c0000000 to -0x0000000070000000
    - Ignoring RAM at 0x0000000200000000-0x0000000240000000 (!CONFIG_HIGHMEM)
    + Truncating RAM at 0x0000000040000000-0x00000000c0000000 to -0x0000000070000000Ignoring RAM at 0x0000000200000000-0x0000000240000000 (!CONFIG_HIGHMEM)"

Joe Perches says:
 "No, that is not intentional.

  The newline handling code inside vprintk_emit is a bit involved and
  for now I suggest a revert until this has all the same behavior as
  earlier"

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Requested-by: Joe Perches <joe@perches.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-09 10:48:18 -07:00
Linus Torvalds
84bd8d33a9 Luiz Capitulino noticed that the tick_stop tracepoint wasn't being parsed
properly by the tracing user space tools. This was due to the
 TRACE_DEFINE_ENUM() being set to a define, when it should have been set
 to the enum itself. The define was of the MASK that used the BIT to shift.
 The BIT was the enum and by adding that, everything gets converted nicely.
 The MASK is still kept just in case it gets converted to an enum in the
 future.
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Merge tag 'trace-v4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fix from Steven Rostedt:
 "Fix tick_stop tracepoint symbols for user export.

  Luiz Capitulino noticed that the tick_stop tracepoint wasn't being
  parsed properly by the tracing user space tools.

  This was due to the TRACE_DEFINE_ENUM() being set to a define, when it
  should have been set to the enum itself.  The define was of the MASK
  that used the BIT to shift.  The BIT was the enum and by adding that,
  everything gets converted nicely.  The MASK is still kept just in case
  it gets converted to an enum in the future"

* tag 'trace-v4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Fix tick_stop tracepoint symbols for user export
2016-08-09 10:34:09 -07:00
Linus Torvalds
cb0d93aaf0 Merge tag 'drm-fixes-for-4.8-rc2' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "This contains a bunch of amdgpu fixes, and some i915 regression fixes.

  It also contains some fixes for an older regression with some EDID
  changes and some 6bpc panels.

  Then there are the lockdep, cirrus and rcar-du regression fixes from
  this window"

* tag 'drm-fixes-for-4.8-rc2' of git://people.freedesktop.org/~airlied/linux:
  drm/cirrus: Fix NULL pointer dereference when registering the fbdev
  drm/edid: Set 8 bpc color depth for displays with "DFP 1.x compliant TMDS".
  drm/i915/dp: Revert "drm/i915/dp: fall back to 18 bpp when sink capability is unknown"
  drm/edid: Add 6 bpc quirk for display AEO model 0.
  drm: Paper over locking inversion after registration rework
  drm: rcar-du: Link HDMI encoder with bridge
  drm/ttm: Wait for a BO to become idle before unbinding it from GTT
  drm/i915/fbdev: Check for the framebuffer before use
  drm/amdgpu: update golden setting of polaris10
  drm/amdgpu: update golden setting of stoney
  drm/amdgpu: update golden setting of polaris11
  drm/amdgpu: update golden setting of carrizo
  drm/amdgpu: update golden setting of iceland
  drm/amd/amdgpu: change pptable output format from ASCII to binary
  drm/amdgpu/ci: add mullins to default case for smc ucode
  drm/amdgpu/gmc7: add missing mullins case
  drm/i915: Never fully mask the the EI up rps interrupt on SNB/IVB
  drm/i915: Wait up to 3ms for the pcu to ack the cdclk change request on SKL
2016-08-09 10:20:21 -07:00
Steven Rostedt (Red Hat)
c87edb3611 tracing: Fix tick_stop tracepoint symbols for user export
The symbols used in the tick_stop tracepoint were not being converted
properly into integers in the trace_stop format file. Instead we had this:

print fmt: "success=%d dependency=%s", REC->success,
    __print_symbolic(REC->dependency, { 0, "NONE" },
     { (1 << TICK_DEP_BIT_POSIX_TIMER), "POSIX_TIMER" },
     { (1 << TICK_DEP_BIT_PERF_EVENTS), "PERF_EVENTS" },
     { (1 << TICK_DEP_BIT_SCHED), "SCHED" },
     { (1 << TICK_DEP_BIT_CLOCK_UNSTABLE), "CLOCK_UNSTABLE" })

User space tools have no idea how to parse "TICK_DEP_BIT_SCHED" or the other
symbols used to do the bit shifting. The reason is that the conversion was
done with using the TICK_DEP_MASK_* symbols which are just macros that
convert to the BIT shift itself (with the exception of NONE, which was
converted properly, because it doesn't use bits, and is defined as zero).

The TICK_DEP_BIT_* needs to be denoted by TRACE_DEFINE_ENUM() in order to
have this properly converted for user space tools to parse this event.

Cc: stable@vger.kernel.org
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Fixes: e6e6cc22e0 ("nohz: Use enum code for tick stop failure tracing message")
Reported-by: Luiz Capitulino <lcapitulino@redhat.com>
Tested-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-08-09 09:51:23 -04:00
Stefan Hajnoczi
28ad55578b virtio-vsock: fix include guard typo
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-08-09 13:42:38 +03:00
Marc Zyngier
f3b0946d62 genirq/msi: Make sure PCI MSIs are activated early
Bharat Kumar Gogada reported issues with the generic MSI code, where the
end-point ended up with garbage in its MSI configuration (both for the vector
and the message).

It turns out that the two MSI paths in the kernel are doing slightly different
things:

generic MSI: disable MSI -> allocate MSI -> enable MSI -> setup EP
PCI MSI: disable MSI -> allocate MSI -> setup EP -> enable MSI

And it turns out that end-points are allowed to latch the content of the MSI
configuration registers as soon as MSIs are enabled.  In Bharat's case, the
end-point ends up using whatever was there already, which is not what you
want.

In order to make things converge, we introduce a new MSI domain flag
(MSI_FLAG_ACTIVATE_EARLY) that is unconditionally set for PCI/MSI. When set,
this flag forces the programming of the end-point as soon as the MSIs are
allocated.

A consequence of this is that we have an extra activate in irq_startup, but
that should be without much consequence.

tglx: 

 - Several people reported a VMWare regression with PCI/MSI-X passthrough. It
   turns out that the patch also cures that issue.

 - We need to have a look at the MSI disable interrupt path, where we write
   the msg to all zeros without disabling MSI in the PCI device. Is that
   correct?

Fixes: 52f518a3a7 "x86/MSI: Use hierarchical irqdomains to manage MSI interrupts"
Reported-and-tested-by: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
Reported-and-tested-by: Foster Snowhill <forst@forstwoof.ru>
Reported-by: Matthias Prager <linux@matthiasprager.de>
Reported-by: Jason Taylor <jason.taylor@simplivity.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1468426713-31431-1-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-08-09 09:19:32 +02:00
Philippe Bergheaud
cbd74e1bc8 cxl: Use fixed width predefined types in data structure.
This patch fixes a regression introduced by commit b810253bd9 ("cxl:
Add mechanism for delivering AFU driver specific events").

It changes the type u8 to __u8 in the uapi header cxl.h, because the
former is a kernel internal type, and may not be defined in userland
build environments, in particular when cross-compiling libcxl on x86_64
linux machines (RHEL6.7 and Ubuntu 16.04).

This patch also changes the size of the field data_size, and makes it
constant, to support 32-bit userland applications running on big-endian
ppc64 kernels transparently.

mpe: This is an ABI change, however the ABI was only added during the
4.8 merge window so has never been part of a released kernel - therefore
we give ourselves permission to change it.

Fixes: b810253bd9 ("cxl: Add mechanism for delivering AFU driver specific events")
Signed-off-by: Philippe Bergheaud <felix@linux.vnet.ibm.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-08-09 16:52:01 +10:00
Linus Torvalds
1eccfa090e Implements HARDENED_USERCOPY verification of copy_to_user/copy_from_user
bounds checking for most architectures on SLAB and SLUB.
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Merge tag 'usercopy-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull usercopy protection from Kees Cook:
 "Tbhis implements HARDENED_USERCOPY verification of copy_to_user and
  copy_from_user bounds checking for most architectures on SLAB and
  SLUB"

* tag 'usercopy-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  mm: SLUB hardened usercopy support
  mm: SLAB hardened usercopy support
  s390/uaccess: Enable hardened usercopy
  sparc/uaccess: Enable hardened usercopy
  powerpc/uaccess: Enable hardened usercopy
  ia64/uaccess: Enable hardened usercopy
  arm64/uaccess: Enable hardened usercopy
  ARM: uaccess: Enable hardened usercopy
  x86/uaccess: Enable hardened usercopy
  mm: Hardened usercopy
  mm: Implement stack frame object validation
  mm: Add is_migrate_cma_page
2016-08-08 14:48:14 -07:00
Linus Torvalds
1bd4403d86 unsafe_[get|put]_user: change interface to use a error target label
When I initially added the unsafe_[get|put]_user() helpers in commit
5b24a7a2aa ("Add 'unsafe' user access functions for batched
accesses"), I made the mistake of modeling the interface on our
traditional __[get|put]_user() functions, which return zero on success,
or -EFAULT on failure.

That interface is fairly easy to use, but it's actually fairly nasty for
good code generation, since it essentially forces the caller to check
the error value for each access.

In particular, since the error handling is already internally
implemented with an exception handler, and we already use "asm goto" for
various other things, we could fairly easily make the error cases just
jump directly to an error label instead, and avoid the need for explicit
checking after each operation.

So switch the interface to pass in an error label, rather than checking
the error value in the caller.  Best do it now before we start growing
more users (the signal handling code in particular would be a good place
to use the new interface).

So rather than

	if (unsafe_get_user(x, ptr))
		... handle error ..

the interface is now

	unsafe_get_user(x, ptr, label);

where an error during the user mode fetch will now just cause a jump to
'label' in the caller.

Right now the actual _implementation_ of this all still ends up being a
"if (err) goto label", and does not take advantage of any exception
label tricks, but for "unsafe_put_user()" in particular it should be
fairly straightforward to convert to using the exception table model.

Note that "unsafe_get_user()" is much harder to convert to a clever
exception table model, because current versions of gcc do not allow the
use of "asm goto" (for the exception) with output values (for the actual
value to be fetched).  But that is hopefully not a limitation in the
long term.

[ Also note that it might be a good idea to switch unsafe_get_user() to
  actually _return_ the value it fetches from user space, but this
  commit only changes the error handling semantics ]

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-08 13:02:01 -07:00
Dave Airlie
4872850a19 Merge branch 'drm-next-4.8' of git://people.freedesktop.org/~agd5f/linux into drm-next
A few fixes for amdgpu and ttm for 4.8
- fix a ttm regression caused by the new pipelining code
- fixes for mullins on amdgpu
- updated golden settings for amdgpu

* 'drm-next-4.8' of git://people.freedesktop.org/~agd5f/linux:
  drm/ttm: Wait for a BO to become idle before unbinding it from GTT
  drm/amdgpu: update golden setting of polaris10
  drm/amdgpu: update golden setting of stoney
  drm/amdgpu: update golden setting of polaris11
  drm/amdgpu: update golden setting of carrizo
  drm/amdgpu: update golden setting of iceland
  drm/amd/amdgpu: change pptable output format from ASCII to binary
  drm/amdgpu/ci: add mullins to default case for smc ucode
  drm/amdgpu/gmc7: add missing mullins case
2016-08-08 16:45:33 +10:00
Linus Torvalds
857953d72f Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull more block fixes from Jens Axboe:
 "As mentioned in the pull the other day, a few more fixes for this
  round, all related to the bio op changes in this series.

  Two fixes, and then a cleanup, renaming bio->bi_rw to bio->bi_opf.  I
  wanted to do that change right after or right before -rc1, so that
  risk of conflict was reduced.  I just rebased the series on top of
  current master, and no new ->bi_rw usage has snuck in"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: rename bio bi_rw to bi_opf
  target: iblock_execute_sync_cache() should use bio_set_op_attrs()
  mm: make __swap_writepage() use bio_set_op_attrs()
  block/mm: make bdev_ops->rw_page() take a bool for read/write
2016-08-07 16:38:45 -07:00
Linus Torvalds
635a4ba111 Merge tag 'drm-for-v4.8-zpos' of git://people.freedesktop.org/~airlied/linux
Pull drm zpos property support from Dave Airlie:
 "This tree was waiting on some media stuff I hadn't had time to get a
  stable branchpoint off, so I just waited until it was all in your tree
  first.

  It's been around a bit on the list and shouldn't affect anything
  outside adding the generic API and moving some ARM drivers to using
  it"

* tag 'drm-for-v4.8-zpos' of git://people.freedesktop.org/~airlied/linux:
  drm: rcar: use generic code for managing zpos plane property
  drm/exynos: use generic code for managing zpos plane property
  drm: sti: use generic zpos for plane
  drm: add generic zpos property
2016-08-07 16:35:08 -07:00
Jens Axboe
1eff9d322a block: rename bio bi_rw to bi_opf
Since commit 63a4cc2486, bio->bi_rw contains flags in the lower
portion and the op code in the higher portions. This means that
old code that relies on manually setting bi_rw is most likely
going to be broken. Instead of letting that brokeness linger,
rename the member, to force old and out-of-tree code to break
at compile time instead of at runtime.

No intended functional changes in this commit.

Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-07 14:41:02 -06:00
Jens Axboe
c11f0c0b5b block/mm: make bdev_ops->rw_page() take a bool for read/write
Commit abf545484d changed it from an 'rw' flags type to the
newer ops based interface, but now we're effectively leaking
some bdev internals to the rest of the kernel. Since we only
care about whether it's a read or a write at that level, just
pass in a bool 'is_write' parameter instead.

Then we can also move op_is_write() and friends back under
CONFIG_BLOCK protection.

Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-07 14:41:02 -06:00
Linus Torvalds
fe64f3283f Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more vfs updates from Al Viro:
 "Assorted cleanups and fixes.

  In the "trivial API change" department - ->d_compare() losing 'parent'
  argument"

* 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  cachefiles: Fix race between inactivating and culling a cache object
  9p: use clone_fid()
  9p: fix braino introduced in "9p: new helper - v9fs_parent_fid()"
  vfs: make dentry_needs_remove_privs() internal
  vfs: remove file_needs_remove_privs()
  vfs: fix deadlock in file_remove_privs() on overlayfs
  get rid of 'parent' argument of ->d_compare()
  cifs, msdos, vfat, hfs+: don't bother with parent in ->d_compare()
  affs ->d_compare(): don't bother with ->d_inode
  fold _d_rehash() and __d_rehash() together
  fold dentry_rcuwalk_invalidate() into its only remaining caller
2016-08-07 10:01:14 -04:00
Linus Torvalds
835c92d43b Merge branch 'work.const-qstr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull qstr constification updates from Al Viro:
 "Fairly self-contained bunch - surprising lot of places passes struct
  qstr * as an argument when const struct qstr * would suffice; it
  complicates analysis for no good reason.

  I'd prefer to feed that separately from the assorted fixes (those are
  in #for-linus and with somewhat trickier topology)"

* 'work.const-qstr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  qstr: constify instances in adfs
  qstr: constify instances in lustre
  qstr: constify instances in f2fs
  qstr: constify instances in ext2
  qstr: constify instances in vfat
  qstr: constify instances in procfs
  qstr: constify instances in fuse
  qstr constify instances in fs/dcache.c
  qstr: constify instances in nfs
  qstr: constify instances in ocfs2
  qstr: constify instances in autofs4
  qstr: constify instances in hfs
  qstr: constify instances in hfsplus
  qstr: constify instances in logfs
  qstr: constify dentry_init_security
2016-08-06 09:49:02 -04:00
Linus Torvalds
0803e04011 virtio/vhost: new features for 4.8
- New vsock device support in host and guest
 - Platform IOMMU support in host and guest,
   including compatibility quirks for legacy systems.
 - Misc fixes and cleanups.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio/vhost updates from Michael Tsirkin:

 - new vsock device support in host and guest

 - platform IOMMU support in host and guest, including compatibility
   quirks for legacy systems.

 - misc fixes and cleanups.

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  VSOCK: Use kvfree()
  vhost: split out vringh Kconfig
  vhost: detect 32 bit integer wrap around
  vhost: new device IOTLB API
  vhost: drop vringh dependency
  vhost: convert pre sorted vhost memory array to interval tree
  vhost: introduce vhost memory accessors
  VSOCK: Add Makefile and Kconfig
  VSOCK: Introduce vhost_vsock.ko
  VSOCK: Introduce virtio_transport.ko
  VSOCK: Introduce virtio_vsock_common.ko
  VSOCK: defer sock removal to transports
  VSOCK: transport-specific vsock_transport functions
  vhost: drop vringh dependency
  vop: pull in vhost Kconfig
  virtio: new feature to detect IOMMU device quirk
  balloon: check the number of available pages in leak balloon
  vhost: lockless enqueuing
  vhost: simplify work flushing
2016-08-06 09:20:13 -04:00
Linus Torvalds
80fac0f577 * ARM bugfix and MSI injection support
* x86 nested virt tweak and OOPS fix
 * Simplify pvclock code (vdso bits acked by Andy Lutomirski).
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull more KVM updates from Paolo Bonzini:
 - ARM bugfix and MSI injection support
 - x86 nested virt tweak and OOPS fix
 - Simplify pvclock code (vdso bits acked by Andy Lutomirski).

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  nvmx: mark ept single context invalidation as supported
  nvmx: remove comment about missing nested vpid support
  KVM: lapic: fix access preemption timer stuff even if kernel_irqchip=off
  KVM: documentation: fix KVM_CAP_X2APIC_API information
  x86: vdso: use __pvclock_read_cycles
  pvclock: introduce seqcount-like API
  arm64: KVM: Set cpsr before spsr on fault injection
  KVM: arm: vgic-irqfd: Workaround changing kvm_set_routing_entry prototype
  KVM: arm/arm64: Enable MSI routing
  KVM: arm/arm64: Enable irqchip routing
  KVM: Move kvm_setup_default/empty_irq_routing declaration in arch specific header
  KVM: irqchip: Convey devid to kvm_set_msi
  KVM: Add devid in kvm_kernel_irq_routing_entry
  KVM: api: Pass the devid in the msi routing entry
2016-08-06 09:18:21 -04:00
Linus Torvalds
a157b3aaa4 pwm: Changes for v4.8-rc1
This set of changes improve some aspects of the atomic API as well as
 make use of this new API in the regulator framework to allow properly
 dealing with critical regulators controlled by a PWM.
 
 Aside from that there's a bunch of updates and cleanups for existing
 drivers, as well as the addition of new drivers for the Broadcom iProc,
 STMPE and ChromeOS EC controllers.
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Merge tag 'pwm/for-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm

Pull pwm updates from Thierry Reding:
 "This set of changes improve some aspects of the atomic API as well as
  make use of this new API in the regulator framework to allow properly
  dealing with critical regulators controlled by a PWM.

  Aside from that there's a bunch of updates and cleanups for existing
  drivers, as well as the addition of new drivers for the Broadcom
  iProc, STMPE and ChromeOS EC controllers"

* tag 'pwm/for-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (44 commits)
  regulator: pwm: Document pwm-dutycycle-unit and pwm-dutycycle-range
  regulator: pwm: Support extra continuous mode cases
  pwm: Add ChromeOS EC PWM driver
  dt-bindings: pwm: Add binding for ChromeOS EC PWM
  mfd: cros_ec: Add EC_PWM function definitions
  mfd: cros_ec: Add cros_ec_cmd_xfer_status() helper
  pwm: atmel: Use of_device_get_match_data()
  pwm: atmel: Fix checkpatch warnings
  pwm: atmel: Fix disabling of PWM channels
  dt-bindings: pwm: Add R-Car H3 device tree bindings
  pwm: rcar: Use ARCH_RENESAS
  pwm: tegra: Add support for Tegra186
  dt-bindings: pwm: tegra: Add compatible string for Tegra186
  pwm: tegra: Avoid overflow when calculating duty cycle
  pwm: tegra: Allow 100 % duty cycle
  pwm: tegra: Add support for reset control
  pwm: tegra: Rename mmio_base to regs
  pwm: tegra: Remove useless padding
  pwm: tegra: Drop NUM_PWM macro
  pwm: lpc32xx: Set PWM_PIN_LEVEL bit to default value
  ...
2016-08-06 00:01:33 -04:00
Linus Torvalds
fff648da96 Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
 "Here's the second round of block updates for this merge window.

  It's a mix of fixes for changes that went in previously in this round,
  and fixes in general.  This pull request contains:

   - Fixes for loop from Christoph

   - A bdi vs gendisk lifetime fix from Dan, worth two cookies.

   - A blk-mq timeout fix, when on frozen queues.  From Gabriel.

   - Writeback fix from Jan, ensuring that __writeback_single_inode()
     does the right thing.

   - Fix for bio->bi_rw usage in f2fs from me.

   - Error path deadlock fix in blk-mq sysfs registration from me.

   - Floppy O_ACCMODE fix from Jiri.

   - Fix to the new bio op methods from Mike.

     One more followup will be coming here, ensuring that we don't
     propagate the block types outside of block.  That, and a rename of
     bio->bi_rw is coming right after -rc1 is cut.

   - Various little fixes"

* 'for-linus' of git://git.kernel.dk/linux-block:
  mm/block: convert rw_page users to bio op use
  loop: make do_req_filebacked more robust
  loop: don't try to use AIO for discards
  blk-mq: fix deadlock in blk_mq_register_disk() error path
  Include: blkdev: Removed duplicate 'struct request;' declaration.
  Fixup direct bi_rw modifiers
  block: fix bdi vs gendisk lifetime mismatch
  blk-mq: Allow timeouts to run while queue is freezing
  nbd: fix race in ioctl
  block: fix use-after-free in seq file
  f2fs: drop bio->bi_rw manual assignment
  block: add missing group association in bio-cloning functions
  blkcg: kill unused field nr_undestroyed_grps
  writeback: Write dirty times for WB_SYNC_ALL writeback
  floppy: fix open(O_ACCMODE) for ioctl-only open
2016-08-05 23:31:51 -04:00
Linus Torvalds
39fada5527 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull more input updates from Dmitry Torokhov:
 "Two new drivers for touchscreen controllers:

   - Silead touchscreen controllers
   - SiS 9200 family touchscreen controllers

  and a few driver fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: silead - remove some dead code
  Input: sis-i2c - select CONFIG_CRC_ITU_T
  Input: add driver for SiS 9200 family I2C touchscreen controllers
  Input: ili210x - fix permissions on "calibrate" attribute
  Input: elan_i2c - properly wake up touchpad on ASUS laptops
  Input: add driver for Silead touchscreens
  Input: elantech - fix debug dump of the current packet
  Input: rotary_encoder - support binary encoding of states
  Input: xpad - power off wireless 360 controllers on suspend
  Input: i8042 - break load dependency between atkbd/psmouse and i8042
  Input: synaptics-rmi4 - do not check for NULL when calling of_node_put()
  Input: cros_ec_keyb - cleanup use of dev
2016-08-05 23:24:15 -04:00
Trond Myklebust
8d480326c3 NFSv4: Cap the transport reconnection timer at 1/2 lease period
We don't want to miss a lease period renewal due to the TCP connection
failing to reconnect in a timely fashion. To ensure this doesn't happen,
cap the reconnection timer so that we retry the connection attempt
at least every 1/2 lease period.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2016-08-05 19:22:22 -04:00
Trond Myklebust
3851f1cdb2 SUNRPC: Limit the reconnect backoff timer to the max RPC message timeout
...and ensure that we propagate it to new transports on the same
client.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2016-08-05 14:12:09 -04:00
Michel Dänzer
34b58355ad drm/ttm: Wait for a BO to become idle before unbinding it from GTT
Fixes hangs under memory pressure, e.g. running the piglit test
tex3d-maxsize concurrently with other tests.

Fixes: 17d33bc9d6 ("drm/ttm: drop waiting for idle in ttm_bo_evict.")
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2016-08-05 13:37:02 -04:00
Linus Torvalds
6c84239d59 RTC for 4.8
Cleanups:
  - huge cleanup of rtc-generic and char/genrtc this allowed to cleanup rtc-cmos,
   rtc-sh, rtc-m68k, rtc-powerpc and rtc-parisc
  - move mn10300 to rtc-cmos
 
 Subsystem:
  - fix wakealarms after hibernate
  - multiples fixes for rctest
  - simplify implementations of .read_alarm
 
 New drivers:
  - Maxim MAX6916
 
 Drivers:
  - ds1307: fix weekday
  - m41t80: add wakeup support
  - pcf85063: add support for PCF85063A variant
  - rv8803: extend i2c fix and other fixes
  - s35390a: fix alarm reading, this fixes instant reboot after shutdown for QNAP
    TS-41x
  - s3c: clock fixes
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Merge tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

Pull RTC updates from Alexandre Belloni:
 "RTC for 4.8

  Cleanups:
   - huge cleanup of rtc-generic and char/genrtc this allowed to cleanup
     rtc-cmos, rtc-sh, rtc-m68k, rtc-powerpc and rtc-parisc
   - move mn10300 to rtc-cmos

  Subsystem:
   - fix wakealarms after hibernate
   - multiples fixes for rctest
   - simplify implementations of .read_alarm

  New drivers:
   - Maxim MAX6916

  Drivers:
   - ds1307: fix weekday
   - m41t80: add wakeup support
   - pcf85063: add support for PCF85063A variant
   - rv8803: extend i2c fix and other fixes
   - s35390a: fix alarm reading, this fixes instant reboot after
     shutdown for QNAP TS-41x
   - s3c: clock fixes"

* tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (65 commits)
  rtc: rv8803: Clear V1F when setting the time
  rtc: rv8803: Stop the clock while setting the time
  rtc: rv8803: Always apply the I²C workaround
  rtc: rv8803: Fix read day of week
  rtc: rv8803: Remove the check for valid time
  rtc: rv8803: Kconfig: Indicate rx8900 support
  rtc: asm9260: remove .owner field for driver
  rtc: at91sam9: Fix missing spin_lock_init()
  rtc: m41t80: add suspend handlers for alarm IRQ
  rtc: m41t80: make it a real error message
  rtc: pcf85063: Add support for the PCF85063A device
  rtc: pcf85063: fix year range
  rtc: hym8563: in .read_alarm set .tm_sec to 0 to signal minute accuracy
  rtc: explicitly set tm_sec = 0 for drivers with minute accurancy
  rtc: s3c: Add s3c_rtc_{enable/disable}_clk in s3c_rtc_setfreq()
  rtc: s3c: Remove unnecessary call to disable already disabled clock
  rtc: abx80x: use devm_add_action_or_reset()
  rtc: m41t80: use devm_add_action_or_reset()
  rtc: fix a typo and reduce three empty lines to one
  rtc: s35390a: improve two comments in .set_alarm
  ...
2016-08-05 09:48:22 -04:00
Linus Torvalds
2cfd716d27 powerpc updates for 4.8 #2
Fixes:
  - Fix early access to cpu_spec relocation from Benjamin Herrenschmidt
  - Fix incorrect event codes in power9-event-list from Madhavan Srinivasan
  - Move register_process_table() out of ppc_md from Michael Ellerman
 
 Use jump_label for [cpu|mmu]_has_feature() from Aneesh Kumar K.V, Kevin Hao and Michael Ellerman:
  - Add mmu_early_init_devtree() from Michael Ellerman
  - Move disable_radix handling into mmu_early_init_devtree() from Michael Ellerman
  - Do hash device tree scanning earlier from Michael Ellerman
  - Do radix device tree scanning earlier from Michael Ellerman
  - Do feature patching before MMU init from Michael Ellerman
  - Check features don't change after patching from Michael Ellerman
  - Make MMU_FTR_RADIX a MMU family feature from Aneesh Kumar K.V
  - Convert mmu_has_feature() to returning bool from Michael Ellerman
  - Convert cpu_has_feature() to returning bool from Michael Ellerman
  - Define radix_enabled() in one place & use static inline from Michael Ellerman
  - Add early_[cpu|mmu]_has_feature() from Michael Ellerman
  - Convert early cpu/mmu feature check to use the new helpers from Aneesh Kumar K.V
  - jump_label: Make it possible for arches to invoke jump_label_init() earlier from Kevin Hao
  - Call jump_label_init() in apply_feature_fixups() from Aneesh Kumar K.V
  - Remove mfvtb() from Kevin Hao
  - Move cpu_has_feature() to a separate file from Kevin Hao
  - Add kconfig option to use jump labels for cpu/mmu_has_feature() from Michael Ellerman
  - Add option to use jump label for cpu_has_feature() from Kevin Hao
  - Add option to use jump label for mmu_has_feature() from Kevin Hao
  - Catch usage of cpu/mmu_has_feature() before jump label init from Aneesh Kumar K.V
  - Annotate jump label assembly from Michael Ellerman
 
 TLB flush enhancements from Aneesh Kumar K.V:
  - radix: Implement tlb mmu gather flush efficiently
  - Add helper for finding SLBE LLP encoding
  - Use hugetlb flush functions
  - Drop multiple definition of mm_is_core_local
  - radix: Add tlb flush of THP ptes
  - radix: Rename function and drop unused arg
  - radix/hugetlb: Add helper for finding page size
  - hugetlb: Add flush_hugetlb_tlb_range
  - remove flush_tlb_page_nohash
 
 Add new ptrace regsets from Anshuman Khandual and Simon Guo:
  - elf: Add powerpc specific core note sections
  - Add the function flush_tmregs_to_thread
  - Enable in transaction NT_PRFPREG ptrace requests
  - Enable in transaction NT_PPC_VMX ptrace requests
  - Enable in transaction NT_PPC_VSX ptrace requests
  - Adapt gpr32_get, gpr32_set functions for transaction
  - Enable support for NT_PPC_CGPR
  - Enable support for NT_PPC_CFPR
  - Enable support for NT_PPC_CVMX
  - Enable support for NT_PPC_CVSX
  - Enable support for TM SPR state
  - Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR
  - Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR
  - Enable support for EBB registers
  - Enable support for Performance Monitor registers
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Merge tag 'powerpc-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull more powerpc updates from Michael Ellerman:
 "These were delayed for various reasons, so I let them sit in next a
  bit longer, rather than including them in my first pull request.

  Fixes:
   - Fix early access to cpu_spec relocation from Benjamin Herrenschmidt
   - Fix incorrect event codes in power9-event-list from Madhavan Srinivasan
   - Move register_process_table() out of ppc_md from Michael Ellerman

  Use jump_label use for [cpu|mmu]_has_feature():
   - Add mmu_early_init_devtree() from Michael Ellerman
   - Move disable_radix handling into mmu_early_init_devtree() from Michael Ellerman
   - Do hash device tree scanning earlier from Michael Ellerman
   - Do radix device tree scanning earlier from Michael Ellerman
   - Do feature patching before MMU init from Michael Ellerman
   - Check features don't change after patching from Michael Ellerman
   - Make MMU_FTR_RADIX a MMU family feature from Aneesh Kumar K.V
   - Convert mmu_has_feature() to returning bool from Michael Ellerman
   - Convert cpu_has_feature() to returning bool from Michael Ellerman
   - Define radix_enabled() in one place & use static inline from Michael Ellerman
   - Add early_[cpu|mmu]_has_feature() from Michael Ellerman
   - Convert early cpu/mmu feature check to use the new helpers from Aneesh Kumar K.V
   - jump_label: Make it possible for arches to invoke jump_label_init() earlier from Kevin Hao
   - Call jump_label_init() in apply_feature_fixups() from Aneesh Kumar K.V
   - Remove mfvtb() from Kevin Hao
   - Move cpu_has_feature() to a separate file from Kevin Hao
   - Add kconfig option to use jump labels for cpu/mmu_has_feature() from Michael Ellerman
   - Add option to use jump label for cpu_has_feature() from Kevin Hao
   - Add option to use jump label for mmu_has_feature() from Kevin Hao
   - Catch usage of cpu/mmu_has_feature() before jump label init from Aneesh Kumar K.V
   - Annotate jump label assembly from Michael Ellerman

  TLB flush enhancements from Aneesh Kumar K.V:
   - radix: Implement tlb mmu gather flush efficiently
   - Add helper for finding SLBE LLP encoding
   - Use hugetlb flush functions
   - Drop multiple definition of mm_is_core_local
   - radix: Add tlb flush of THP ptes
   - radix: Rename function and drop unused arg
   - radix/hugetlb: Add helper for finding page size
   - hugetlb: Add flush_hugetlb_tlb_range
   - remove flush_tlb_page_nohash

  Add new ptrace regsets from Anshuman Khandual and Simon Guo:
   - elf: Add powerpc specific core note sections
   - Add the function flush_tmregs_to_thread
   - Enable in transaction NT_PRFPREG ptrace requests
   - Enable in transaction NT_PPC_VMX ptrace requests
   - Enable in transaction NT_PPC_VSX ptrace requests
   - Adapt gpr32_get, gpr32_set functions for transaction
   - Enable support for NT_PPC_CGPR
   - Enable support for NT_PPC_CFPR
   - Enable support for NT_PPC_CVMX
   - Enable support for NT_PPC_CVSX
   - Enable support for TM SPR state
   - Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR
   - Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR
   - Enable support for EBB registers
   - Enable support for Performance Monitor registers"

* tag 'powerpc-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (48 commits)
  powerpc/mm: Move register_process_table() out of ppc_md
  powerpc/perf: Fix incorrect event codes in power9-event-list
  powerpc/32: Fix early access to cpu_spec relocation
  powerpc/ptrace: Enable support for Performance Monitor registers
  powerpc/ptrace: Enable support for EBB registers
  powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR
  powerpc/ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR
  powerpc/ptrace: Enable support for TM SPR state
  powerpc/ptrace: Enable support for NT_PPC_CVSX
  powerpc/ptrace: Enable support for NT_PPC_CVMX
  powerpc/ptrace: Enable support for NT_PPC_CFPR
  powerpc/ptrace: Enable support for NT_PPC_CGPR
  powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction
  powerpc/ptrace: Enable in transaction NT_PPC_VSX ptrace requests
  powerpc/ptrace: Enable in transaction NT_PPC_VMX ptrace requests
  powerpc/ptrace: Enable in transaction NT_PRFPREG ptrace requests
  powerpc/process: Add the function flush_tmregs_to_thread
  elf: Add powerpc specific core note sections
  powerpc/mm: remove flush_tlb_page_nohash
  powerpc/mm/hugetlb: Add flush_hugetlb_tlb_range
  ...
2016-08-05 09:00:54 -04:00
Linus Torvalds
84e39eeb08 Second round of merge items for 4.8
- hfi1 driver updates
 - Fix for max SGEs allowed via RDMA R/W API
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Merge tag 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull second round of rdma updates from Doug Ledford:
 "This can be split out into just two categories:

   - fixes to the RDMA R/W API in regards to SG list length limits
     (about 5 patches)

   - fixes/features for the Intel hfi1 driver (everything else)

  The hfi1 driver is still being brought to full feature support by
  Intel, and they have a lot of people working on it, so that amounts to
  almost the entirety of this pull request"

* tag 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (84 commits)
  IB/hfi1: Add cache evict LRU list
  IB/hfi1: Fix memory leak during unexpected shutdown
  IB/hfi1: Remove unneeded mm argument in remove function
  IB/hfi1: Consistently call ops->remove outside spinlock
  IB/hfi1: Use evict mmu rb operation
  IB/hfi1: Add evict operation to the mmu rb handler
  IB/hfi1: Fix TID caching actions
  IB/hfi1: Make the cache handler own its rb tree root
  IB/hfi1: Make use of mm consistent
  IB/hfi1: Fix user SDMA racy user request claim
  IB/hfi1: Fix error condition that needs to clean up
  IB/hfi1: Release node on insert failure
  IB/hfi1: Validate SDMA user iovector count
  IB/hfi1: Validate SDMA user request index
  IB/hfi1: Use the same capability state for all shared contexts
  IB/hfi1: Prevent null pointer dereference
  IB/hfi1: Rename TID mmu_rb_* functions
  IB/hfi1: Remove unneeded empty check in hfi1_mmu_rb_unregister()
  IB/hfi1: Restructure hfi1_file_open
  IB/hfi1: Make iovec loop index easy to understand
  ...
2016-08-04 20:26:31 -04:00
Linus Torvalds
0cda611386 Round one of 4.8 code
- Updates/fixes for iw_cxgb4 driver
 - Updates/fixes for mlx5 driver
 - Add flow steering and RSS API
 - Add hardware stats to mlx4 and mlx5 drivers
 - Add firmware version API for RDMA driver use
 - Add the rxe driver (this is a software RoCE driver that makes any
   Ethernet device a RoCE device)
 - Fixes for i40iw driver
 - Support for send only multicast joins in the cma layer
 - Other minor fixes
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull base rdma updates from Doug Ledford:
 "Round one of 4.8 code: while this is mostly normal, there is a new
  driver in here (the driver was hosted outside the kernel for several
  years and is actually a fairly mature and well coded driver).  It
  amounts to 13,000 of the 16,000 lines of added code in here.

  Summary:

   - Updates/fixes for iw_cxgb4 driver
   - Updates/fixes for mlx5 driver
   - Add flow steering and RSS API
   - Add hardware stats to mlx4 and mlx5 drivers
   - Add firmware version API for RDMA driver use
   - Add the rxe driver (this is a software RoCE driver that makes any
     Ethernet device a RoCE device)
   - Fixes for i40iw driver
   - Support for send only multicast joins in the cma layer
   - Other minor fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (72 commits)
  Soft RoCE driver
  IB/core: Support for CMA multicast join flags
  IB/sa: Add cached attribute containing SM information to SA port
  IB/uverbs: Fix race between uverbs_close and remove_one
  IB/mthca: Clean up error unwind flow in mthca_reset()
  IB/mthca: NULL arg to pci_dev_put is OK
  IB/hfi1: NULL arg to sc_return_credits is OK
  IB/mlx4: Add diagnostic hardware counters
  net/mlx4: Query performance and diagnostics counters
  net/mlx4: Add diagnostic counters capability bit
  Use smaller 512 byte messages for portmapper messages
  IB/ipoib: Report SG feature regardless of HW UD CSUM capability
  IB/mlx4: Don't use GFP_ATOMIC for CQ resize struct
  IB/hfi1: Disable by default
  IB/rdmavt: Disable by default
  IB/mlx5: Fix port counter ID association to QP offset
  IB/mlx5: Fix iteration overrun in GSI qps
  i40iw: Add NULL check for puda buffer
  i40iw: Change dup_ack_thresh to u8
  i40iw: Remove unnecessary check for moving CQ head
  ...
2016-08-04 20:10:31 -04:00
Linus Torvalds
fdf1f7ff1b Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target updates from Nicholas Bellinger:
 "The most notable item is IBM virtual SCSI target driver, that was
  originally ported to target-core back in 2010 by Tomo-san, and has
  been brought forward to v4.x code by Bryant Ly, Michael Cyr and co
  over the last months.

  Also included are two ORDERED task related bug-fixes Bryant + Michael
  found along the way using ibmvscsis with AIX guests, plus a few
  miscellaneous target-core + iscsi-target bug-fixes with associated
  stable tags"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  target: fix spelling mistake: "limitiation" -> "limitation"
  target: Fix residual overflow handling in target_complete_cmd_with_length
  tcm_fc: set and unset FCP_SPPF_TARG_FCN
  iscsi-target: Fix panic when adding second TCP connection to iSCSI session
  ibmvscsis: Initial commit of IBM VSCSI Tgt Driver
  target: Fix ordered task CHECK_CONDITION early exception handling
  target: Fix ordered task target_setup_cmd_from_cdb exception hang
  target: Fix max_unmap_lba_count calc overflow
  target: Fix race between iscsi-target connection shutdown + ABORT_TASK
  target: Fix missing complete during ABORT_TASK + CMD_T_FABRIC_STOP
2016-08-04 20:04:37 -04:00
Linus Torvalds
a71e36045e Highlights:
Trond made a change to the server's tcp logic that allows a fast
 	client to better take advantage of high bandwidth networks, but
 	may increase the risk that a single client could starve other
 	clients; a new sunrpc.svc_rpc_per_connection_limit parameter
 	should help mitigate this in the (hopefully unlikely) event this
 	becomes a problem in practice.
 
 	Tom Haynes added a minimal flex-layout pnfs server, which is of
 	no use in production for now--don't build it unless you're doing
 	client testing or further server development.
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Merge tag 'nfsd-4.8' of git://linux-nfs.org/~bfields/linux

Pull nfsd updates from Bruce Fields:
 "Highlights:

   - Trond made a change to the server's tcp logic that allows a fast
     client to better take advantage of high bandwidth networks, but may
     increase the risk that a single client could starve other clients;
     a new sunrpc.svc_rpc_per_connection_limit parameter should help
     mitigate this in the (hopefully unlikely) event this becomes a
     problem in practice.

   - Tom Haynes added a minimal flex-layout pnfs server, which is of no
     use in production for now--don't build it unless you're doing
     client testing or further server development"

* tag 'nfsd-4.8' of git://linux-nfs.org/~bfields/linux: (32 commits)
  nfsd: remove some dead code in nfsd_create_locked()
  nfsd: drop unnecessary MAY_EXEC check from create
  nfsd: clean up bad-type check in nfsd_create_locked
  nfsd: remove unnecessary positive-dentry check
  nfsd: reorganize nfsd_create
  nfsd: check d_can_lookup in fh_verify of directories
  nfsd: remove redundant zero-length check from create
  nfsd: Make creates return EEXIST instead of EACCES
  SUNRPC: Detect immediate closure of accepted sockets
  SUNRPC: accept() may return sockets that are still in SYN_RECV
  nfsd: allow nfsd to advertise multiple layout types
  nfsd: Close race between nfsd4_release_lockowner and nfsd4_lock
  nfsd/blocklayout: Make sure calculate signature/designator length aligned
  xfs: abstract block export operations from nfsd layouts
  SUNRPC: Remove unused callback xpo_adjust_wspace()
  SUNRPC: Change TCP socket space reservation
  SUNRPC: Add a server side per-connection limit
  SUNRPC: Micro optimisation for svc_data_ready
  SUNRPC: Call the default socket callbacks instead of open coding
  SUNRPC: lock the socket while detaching it
  ...
2016-08-04 19:59:06 -04:00
Linus Torvalds
d58b0d980f Merge branch 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull more btrfs updates from Chris Mason:
 "This is part two of my btrfs pull, which is some cleanups and a batch
  of fixes.

  Most of the code here is from Jeff Mahoney, making the pointers we
  pass around internally more consistent and less confusing overall.  I
  noticed a small problem right before I sent this out yesterday, so I
  fixed it up and re-tested overnight"

* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (40 commits)
  Btrfs: fix __MAX_CSUM_ITEMS
  btrfs: btrfs_abort_transaction, drop root parameter
  btrfs: add btrfs_trans_handle->fs_info pointer
  btrfs: btrfs_relocate_chunk pass extent_root to btrfs_end_transaction
  btrfs: convert nodesize macros to static inlines
  btrfs: introduce BTRFS_MAX_ITEM_SIZE
  btrfs: cleanup, remove prototype for btrfs_find_root_ref
  btrfs: copy_to_sk drop unused root parameter
  btrfs: simpilify btrfs_subvol_inherit_props
  btrfs: tests, use BTRFS_FS_STATE_DUMMY_FS_INFO instead of dummy root
  btrfs: tests, require fs_info for root
  btrfs: tests, move initialization into tests/
  btrfs: btrfs_test_opt and friends should take a btrfs_fs_info
  btrfs: prefix fsid to all trace events
  btrfs: plumb fs_info into btrfs_work
  btrfs: remove obsolete part of comment in statfs
  btrfs: hide test-only member under ifdef
  btrfs: Ratelimit "no csum found" info message
  btrfs: Add ratelimit to btrfs printing
  Btrfs: fix unexpected balance crash due to BUG_ON
  ...
2016-08-04 19:56:16 -04:00
Linus Torvalds
8e7106a607 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
Pull m68knommu updates from Greg Ungerer:
 "This series is all about Nicolas flat format support for MMU systems.

  Traditional m68k no-MMU flat format binaries can now be run on m68k
  MMU enabled systems too.  The series includes some nice cleanups of
  the binfmt_flat code and converts it to using proper user space
  accessor functions.

  With all this in place you can boot and run a complete no-MMU flat
  format based user space on an MMU enabled system"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68k: enable binfmt_flat on systems with an MMU
  binfmt_flat: allow compressed flat binary format to work on MMU systems
  binfmt_flat: add MMU-specific support
  binfmt_flat: update libraries' data segment pointer with userspace accessors
  binfmt_flat: use clear_user() rather than memset() to clear .bss
  binfmt_flat: use proper user space accessors with old relocs code
  binfmt_flat: use proper user space accessors with relocs processing code
  binfmt_flat: clean up create_flat_tables() and stack accesses
  binfmt_flat: use generic transfer_args_to_stack()
  elf_fdpic_transfer_args_to_stack(): make it generic
  binfmt_flat: prevent kernel dammage from corrupted executable headers
  binfmt_flat: convert printk invocations to their modern form
  binfmt_flat: assorted cleanups
  m68k: use same start_thread() on MMU and no-MMU
  m68k: fix file path comment
  m68k: fix bFLT executable running on MMU enabled systems
2016-08-04 18:04:44 -04:00
Mike Christie
abf545484d mm/block: convert rw_page users to bio op use
The rw_page users were not converted to use bio/req ops. As a result
bdev_write_page is not passing down REQ_OP_WRITE and the IOs will
be sent down as reads.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Fixes: 4e1b2d52a8 ("block, fs, drivers: remove REQ_OP compat defs and related code")

Modified by me to:

1) Drop op_flags passing into ->rw_page(), as we don't use it.
2) Make op_is_write() and friends safe to use for !CONFIG_BLOCK

Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-04 14:25:33 -06:00
John Pittman
6d25ec147e Include: blkdev: Removed duplicate 'struct request;' declaration.
In include/linux/blkdev.h duplicate declarations of the request
struct exist.  Cleaned up by removing the second, unneeded
declaration.

Signed-off-by: John Pittman <jpittman@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-04 14:19:16 -06:00
Dan Williams
df08c32ce3 block: fix bdi vs gendisk lifetime mismatch
The name for a bdi of a gendisk is derived from the gendisk's devt.
However, since the gendisk is destroyed before the bdi it leaves a
window where a new gendisk could dynamically reuse the same devt while a
bdi with the same name is still live.  Arrange for the bdi to hold a
reference against its "owner" disk device while it is registered.
Otherwise we can hit sysfs duplicate name collisions like the following:

 WARNING: CPU: 10 PID: 2078 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x80
 sysfs: cannot create duplicate filename '/devices/virtual/bdi/259:1'

 Hardware name: HP ProLiant DL580 Gen8, BIOS P79 05/06/2015
  0000000000000286 0000000002c04ad5 ffff88006f24f970 ffffffff8134caec
  ffff88006f24f9c0 0000000000000000 ffff88006f24f9b0 ffffffff8108c351
  0000001f0000000c ffff88105d236000 ffff88105d1031e0 ffff8800357427f8
 Call Trace:
  [<ffffffff8134caec>] dump_stack+0x63/0x87
  [<ffffffff8108c351>] __warn+0xd1/0xf0
  [<ffffffff8108c3cf>] warn_slowpath_fmt+0x5f/0x80
  [<ffffffff812a0d34>] sysfs_warn_dup+0x64/0x80
  [<ffffffff812a0e1e>] sysfs_create_dir_ns+0x7e/0x90
  [<ffffffff8134faaa>] kobject_add_internal+0xaa/0x320
  [<ffffffff81358d4e>] ? vsnprintf+0x34e/0x4d0
  [<ffffffff8134ff55>] kobject_add+0x75/0xd0
  [<ffffffff816e66b2>] ? mutex_lock+0x12/0x2f
  [<ffffffff8148b0a5>] device_add+0x125/0x610
  [<ffffffff8148b788>] device_create_groups_vargs+0xd8/0x100
  [<ffffffff8148b7cc>] device_create_vargs+0x1c/0x20
  [<ffffffff811b775c>] bdi_register+0x8c/0x180
  [<ffffffff811b7877>] bdi_register_dev+0x27/0x30
  [<ffffffff813317f5>] add_disk+0x175/0x4a0

Cc: <stable@vger.kernel.org>
Reported-by: Yi Zhang <yizhan@redhat.com>
Tested-by: Yi Zhang <yizhan@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Fixed up missing 0 return in bdi_register_owner().

Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-04 14:19:16 -06:00
Paolo Valente
20bd723ec6 block: add missing group association in bio-cloning functions
When a bio is cloned, the newly created bio must be associated with
the same blkcg as the original bio (if BLK_CGROUP is enabled). If
this operation is not performed, then the new bio is not associated
with any group, and the group of the current task is returned when
the group of the bio is requested.

Depending on the cloning frequency, this may cause a large
percentage of the bios belonging to a given group to be treated
as if belonging to other groups (in most cases as if belonging to
the root group). The expected group isolation may thereby be broken.

This commit adds the missing association in bio-cloning functions.

Fixes: da2f0f74cf ("Btrfs: add support for blkio controllers")
Cc: stable@vger.kernel.org # v4.3+

Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Reviewed-by: Nikolay Borisov <kernel@kyup.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-04 14:19:16 -06:00
Doug Ledford
7f1d25b47d Merge branches 'misc' and 'rxe' into k.o/for-4.8-1 2016-08-04 11:13:47 -04:00