linux-kernel - [GIT PULL] locking changes for v5.19

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Date:   Mon, 23 May 2022 18:17:29 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] locking changes for v5.19

Linus,

Please pull the latest locking/core git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking-core-2022-05-23

   # HEAD: 8491d1bdf5de152f27fc941e2dcdc4e66c950542 sched/clock: Use try_cmpxchg64 in sched_clock_{local,remote}

Locking changes in this cycle were:

 - rwsem cleanups & optimizations/fixes:
    - Conditionally wake waiters in reader/writer slowpaths
    - Always try to wake waiters in out_nolock path

 - Add try_cmpxchg64() implementation, with arch optimizations - and use it to
   micro-optimize sched_clock_{local,remote}()

 - Various force-inlining fixes to address objdump instrumentation-check warnings

 - Add lock contention tracepoints:

    lock:contention_begin
    lock:contention_end

 - Misc smaller fixes & cleanups

 Thanks,

	Ingo

------------------>
Borislav Petkov (3):
      task_stack, x86/cea: Force-inline stack helpers
      x86/kvm/svm: Force-inline GHCB accessors
      x86/mm: Force-inline __phys_addr_nodebug()

Namhyung Kim (2):
      locking: Add lock contention tracepoints
      locking: Apply contention tracepoints in the slow path

Nick Desaulniers (1):
      lockdep: Fix -Wunused-parameter for _THIS_IP_

Peter Zijlstra (1):
      locking/mutex: Make contention tracepoints more consistent wrt adaptive spinning

Sebastian Andrzej Siewior (1):
      futex: Remove a PREEMPT_RT_FULL reference.

Thomas Gleixner (1):
      lockdep: Delete local_irq_enable_in_hardirq()

Uros Bizjak (3):
      locking/atomic: Add generic try_cmpxchg64 support
      locking/atomic/x86: Introduce arch_try_cmpxchg64
      sched/clock: Use try_cmpxchg64 in sched_clock_{local,remote}

Waiman Long (4):
      locking/rwsem: No need to check for handoff bit if wait queue empty
      locking/rwsem: Conditionally wake waiters in reader/writer slowpaths
      locking/rwsem: Always try to wake waiters in out_nolock path
      locking/qrwlock: Change "queue rwlock" to "queued rwlock"


 arch/arm64/kernel/entry-common.c            |   8 +-
 arch/x86/include/asm/cmpxchg_32.h           |  21 +++++
 arch/x86/include/asm/cmpxchg_64.h           |   6 ++
 arch/x86/include/asm/cpu_entry_area.h       |   2 +-
 arch/x86/include/asm/page_64.h              |   2 +-
 arch/x86/include/asm/svm.h                  |   8 +-
 include/asm-generic/qrwlock.h               |  28 +++---
 include/asm-generic/qrwlock_types.h         |   2 +-
 include/linux/atomic/atomic-arch-fallback.h |  72 ++++++++++++++-
 include/linux/atomic/atomic-instrumented.h  |  40 ++++++++-
 include/linux/interrupt.h                   |  18 ----
 include/linux/irqflags.h                    |   4 +-
 include/linux/kvm_host.h                    |   2 +-
 include/linux/sched/task_stack.h            |   2 +-
 include/trace/events/lock.h                 |  63 +++++++++++++-
 kernel/entry/common.c                       |   6 +-
 kernel/futex/pi.c                           |   2 +-
 kernel/locking/lockdep.c                    |  23 ++---
 kernel/locking/mutex.c                      |  18 +++-
 kernel/locking/percpu-rwsem.c               |   5 ++
 kernel/locking/qrwlock.c                    |  17 +++-
 kernel/locking/qspinlock.c                  |   5 ++
 kernel/locking/rtmutex.c                    |  11 +++
 kernel/locking/rwbase_rt.c                  |   7 ++
 kernel/locking/rwsem.c                      | 130 +++++++++++++++++-----------
 kernel/locking/semaphore.c                  |  15 +++-
 kernel/sched/clock.c                        |   4 +-
 kernel/sched/idle.c                         |   2 +-
 kernel/trace/trace_preemptirq.c             |   4 +-
 scripts/atomic/gen-atomic-fallback.sh       |  31 ++++---
 scripts/atomic/gen-atomic-instrumented.sh   |   2 +-
 31 files changed, 412 insertions(+), 148 deletions(-)