[GIT PULL] locking changes for v4.12

[Ingo Molnar <mingo@kernel.org>]

Linus,

Please pull the latest locking-core-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking-core-for-linus

   # HEAD: 59cd42c29618c45cd3c56da43402b14f611888dd MAINTAINERS: Add FUTEX SUBSYSTEM

( NOTE: due to dependencies this tree relies on the sched/core tree. If you did 
  not pull that tree then disregard this pull request, I'll rework it all. )

The main changes in this cycle were:

 - A big round of FUTEX_UNLOCK_PI improvements, fixes, cleanups and general restructuring

 - Lockdep updates such as new checks for lock_downgrade()

 - Introduce the new atomic_try_cmpxchg() locking API and use it to optimize 
   refcount code generation

 - ... plus misc fixes, updates and cleanups.

 Thanks,

	Ingo

------------------>

Chris Wilson (1):
      locking/ww-mutex: Limit stress test to 2 seconds

Darren Hart (VMware) (2):
      futex: Clarify mark_wake_futex memory barrier usage
      MAINTAINERS: Add FUTEX SUBSYSTEM

David Windsor (1):
      locking/refcount: Add refcount_t API kernel-doc comments

Ingo Molnar (2):
      Merge branch 'locking/urgent' into locking/core, to pick up fixes
      Merge branch 'linus' into locking/core, to pick up fixes

J. R. Okajima (3):
      locking/lockdep: Factor out the find_held_lock() helper function
      locking/lockdep: Factor out the validate_held_lock() helper function
      locking/lockdep: Add new check to lock_downgrade()

Mike Galbraith (1):
      rtmutex: Plug preempt count leak in rt_mutex_futex_unlock()

Peter Zijlstra (25):
      locking/ww_mutex: Improve test to cover acquire context changes
      locking/atomic: Introduce atomic_try_cmpxchg()
      locking/refcounts: Use atomic_try_cmpxchg()
      locking/atomic/x86: Use atomic_try_cmpxchg()
      futex: Cleanup variable names for futex_top_waiter()
      futex: Use smp_store_release() in mark_wake_futex()
      futex: Remove rt_mutex_deadlock_account_*()
      futex,rt_mutex: Provide futex specific rt_mutex API
      futex: Change locking rules
      futex: Cleanup refcounting
      futex: Rework inconsistent rt_mutex/futex_q state
      futex: Pull rt_mutex_futex_unlock() out from under hb->lock
      futex,rt_mutex: Introduce rt_mutex_init_waiter()
      futex,rt_mutex: Restructure rt_mutex_finish_proxy_lock()
      futex: Rework futex_lock_pi() to use rt_mutex_*_proxy_lock()
      futex: Futex_unlock_pi() determinism
      futex: Drop hb->lock before enqueueing on the rtmutex
      lockdep: Fix per-cpu static objects
      locking/atomic: Fix atomic_try_cmpxchg() semantics
      rtmutex: Clean up
      sched/rtmutex: Refactor rt_mutex_setprio()
      sched,tracing: Update trace_sched_pi_setprio()
      rtmutex: Fix PI chain order integrity
      rtmutex: Fix more prio comparisons
      futex: Fix small (and harmless looking) inconsistencies

Thomas Gleixner (3):
      locking/lockdep: Handle statically initialized PER_CPU locks properly
      Merge branch 'sched/core' into locking/core
      futex: Avoid freeing an active timer

Xunlei Pang (3):
      rtmutex: Deboost before waking up the top waiter
      sched/rtmutex/deadline: Fix a PI crash for deadline tasks
      sched/deadline/rtmutex: Dont miss the dl_runtime/dl_period update


 MAINTAINERS                        |  17 +++++
 arch/x86/include/asm/atomic.h      |  33 ++++-----
 arch/x86/include/asm/atomic64_64.h |  46 ++++++-------
 arch/x86/include/asm/cmpxchg.h     |  70 +++++++++++++++++++
 include/linux/atomic.h             |  46 +++++++++++++
 include/linux/init_task.h          |   1 +
 include/linux/lockdep.h            |   3 +
 include/linux/module.h             |   6 ++
 include/linux/percpu.h             |   1 +
 include/linux/refcount.h           |  19 ++++++
 include/linux/sched.h              |   2 +
 include/linux/sched/rt.h           |  23 +++----
 include/linux/smp.h                |  12 ++++
 include/trace/events/sched.h       |  16 +++--
 kernel/cpu.c                       |   6 ++
 kernel/fork.c                      |   1 +
 kernel/futex.c                     | 518 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----------------------------------------------
 kernel/locking/lockdep.c           | 242 +++++++++++++++++++++++++++++++++++++++++------------------------
 kernel/locking/rtmutex-debug.c     |   9 ---
 kernel/locking/rtmutex-debug.h     |   3 -
 kernel/locking/rtmutex.c           | 390 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------------------------------
 kernel/locking/rtmutex.h           |   2 -
 kernel/locking/rtmutex_common.h    |  25 +++++--
 kernel/locking/rwsem.c             |   6 +-
 kernel/locking/test-ww_mutex.c     |  29 ++++----
 kernel/module.c                    |  42 ++++++++----
 kernel/sched/core.c                |  64 +++++++++++++++---
 lib/refcount.c                     | 169 ++++++++++++++++++++++++++++++++++------------
 mm/percpu.c                        |  40 +++++++----
 29 files changed, 1231 insertions(+), 610 deletions(-)