linux-kernel - [GIT PULL, v2] locking changes for v6.4

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Date:   Fri, 5 May 2023 10:26:47 +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>,
        Borislav Petkov <bp@...en8.de>
Subject: [GIT PULL, v2] locking changes for v6.4


Linus,

Please pull the latest locking/core git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking-core-2023-05-05

   # HEAD: ec570320b09f76d52819e60abdccf372658216b6 locking/atomic: Correct (cmp)xchg() instrumentation

Locking changes in v6.4:

 - Introduce local{,64}_try_cmpxchg() - a slightly more optimal
   primitive, which will be used in perf events ring-buffer code.

 - Simplify/modify rwsems on PREEMPT_RT, to address writer starvation.

 - Misc cleanups/fixes.

 Thanks,

	Ingo

------------------>
Andrzej Hajda (1):
      locking/arch: Rename all internal __xchg() names to __arch_xchg()

Mark Rutland (1):
      locking/atomic: Correct (cmp)xchg() instrumentation

Sebastian Andrzej Siewior (1):
      locking/rwbase: Mitigate indefinite writer starvation

Uros Bizjak (4):
      locking/atomic: Add generic try_cmpxchg{,64}_local() support
      locking/generic: Wire up local{,64}_try_cmpxchg()
      locking/arch: Wire up local_try_cmpxchg()
      locking/x86: Define arch_try_cmpxchg_local()


 arch/alpha/include/asm/cmpxchg.h            | 10 ++--
 arch/alpha/include/asm/local.h              | 12 +++-
 arch/arc/include/asm/cmpxchg.h              |  4 +-
 arch/arm/include/asm/cmpxchg.h              |  7 ++-
 arch/arm64/include/asm/cmpxchg.h            |  7 +--
 arch/hexagon/include/asm/cmpxchg.h          | 10 ++--
 arch/ia64/include/asm/cmpxchg.h             |  2 +-
 arch/ia64/include/uapi/asm/cmpxchg.h        |  4 +-
 arch/loongarch/include/asm/cmpxchg.h        |  4 +-
 arch/loongarch/include/asm/local.h          | 13 ++++-
 arch/m68k/include/asm/cmpxchg.h             |  6 +-
 arch/mips/include/asm/cmpxchg.h             |  4 +-
 arch/mips/include/asm/local.h               | 13 ++++-
 arch/openrisc/include/asm/cmpxchg.h         | 10 ++--
 arch/parisc/include/asm/cmpxchg.h           |  4 +-
 arch/powerpc/include/asm/cmpxchg.h          |  4 +-
 arch/powerpc/include/asm/local.h            | 11 ++++
 arch/riscv/include/asm/atomic.h             |  2 +-
 arch/riscv/include/asm/cmpxchg.h            |  4 +-
 arch/s390/include/asm/cmpxchg.h             |  8 +--
 arch/sh/include/asm/cmpxchg.h               |  4 +-
 arch/sparc/include/asm/cmpxchg_32.h         |  4 +-
 arch/sparc/include/asm/cmpxchg_64.h         |  6 +-
 arch/x86/include/asm/cmpxchg.h              |  6 ++
 arch/x86/include/asm/local.h                | 13 ++++-
 arch/xtensa/include/asm/cmpxchg.h           |  4 +-
 include/asm-generic/local.h                 |  1 +
 include/asm-generic/local64.h               | 12 +++-
 include/linux/atomic/atomic-arch-fallback.h | 24 +++++++-
 include/linux/atomic/atomic-instrumented.h  | 86 +++++++++++++++++------------
 kernel/locking/rwbase_rt.c                  |  9 ---
 scripts/atomic/gen-atomic-fallback.sh       |  4 ++
 scripts/atomic/gen-atomic-instrumented.sh   |  8 +--
 33 files changed, 209 insertions(+), 111 deletions(-)