linux-kernel - [GIT PULL] locking changes for v6.9

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Date: Mon, 11 Mar 2024 12:20:12 +0100
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>, Will Deacon <will@...nel.org>,
	Waiman Long <longman@...hat.com>, Boqun Feng <boqun.feng@...il.com>,
	Borislav Petkov <bp@...en8.de>
Subject: [GIT PULL] locking changes for v6.9

Linus,

Please pull the latest locking/core git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking-core-2024-03-11

   # HEAD: ce3576ebd62d99f79c1dc98824e2ef6d6ab68434 locking/rtmutex: Use try_cmpxchg_relaxed() in mark_rt_mutex_waiters()

Locking changes for v6.9:

- Micro-optimize local_xchg() and the rtmutex code on x86

- Fix percpu-rwsem contention tracepoints

- Simplify debugging Kconfig dependencies

- Update/clarify the documentation of atomic primitives

- Misc cleanups

Thanks,

	Ingo

------------------>
Mark Rutland (1):
      locking/atomic: scripts: Clarify ordering of conditional atomics

Namhyung Kim (1):
      locking/percpu-rwsem: Trigger contention tracepoints only if contended

Uros Bizjak (2):
      locking/x86: Implement local_xchg() using CMPXCHG without the LOCK prefix
      locking/rtmutex: Use try_cmpxchg_relaxed() in mark_rt_mutex_waiters()

Waiman Long (4):
      locking/qspinlock: Fix 'wait_early' set but not used warning
      locking/mutex: Simplify <linux/mutex.h>
      locking/rwsem: Clarify that RWSEM_READER_OWNED is just a hint
      locking/rwsem: Make DEBUG_RWSEMS and PREEMPT_RT mutually exclusive


 arch/x86/include/asm/local.h                 | 16 ++++++-
 include/linux/atomic/atomic-arch-fallback.h  | 46 +++++++++++++++----
 include/linux/atomic/atomic-instrumented.h   | 68 ++++++++++++++++++++++------
 include/linux/atomic/atomic-long.h           | 24 ++++++++--
 include/linux/mutex.h                        |  8 +---
 kernel/locking/percpu-rwsem.c                | 11 +++--
 kernel/locking/qspinlock_paravirt.h          |  2 +-
 kernel/locking/rtmutex.c                     |  9 ++--
 kernel/locking/rwsem.c                       |  6 +--
 lib/Kconfig.debug                            |  4 +-
 scripts/atomic/kerneldoc/add_unless          |  1 +
 scripts/atomic/kerneldoc/cmpxchg             |  1 +
 scripts/atomic/kerneldoc/dec_if_positive     |  1 +
 scripts/atomic/kerneldoc/dec_unless_positive |  1 +
 scripts/atomic/kerneldoc/inc_not_zero        |  1 +
 scripts/atomic/kerneldoc/inc_unless_negative |  1 +
 scripts/atomic/kerneldoc/try_cmpxchg         |  3 +-
 17 files changed, 154 insertions(+), 49 deletions(-)