linux-kernel - [GIT PULL] x86/asm changes for v6.7

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Date:   Sat, 28 Oct 2023 14:59:45 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Uros Bizjak <ubizjak@...il.com>,
        Brian Gerst <brgerst@...il.com>,
        Andy Lutomirski <luto@...nel.org>
Subject: [GIT PULL] x86/asm changes for v6.7

Linus,

Please pull the latest x86/asm git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-asm-2023-10-28

   # HEAD: 8ae292c66dcb160b3e1e16b66c3076d5a2c63873 x86/lib: Address kernel-doc warnings

x86 assembly code improvements for v6.7 are:

- Micro-optimize the x86 bitops code
- Define target-specific {raw,this}_cpu_try_cmpxchg{64,128}() to improve code generation
- Define and use raw_cpu_try_cmpxchg() preempt_count_set()
- Do not clobber %rsi in percpu_{try_,}cmpxchg{64,128}_op
- Remove the unused __sw_hweight64() implementation on x86-32
- Misc fixes and cleanups

 Thanks,

	Ingo

------------------>
Ingo Molnar (1):
      x86/bitops: Remove unused __sw_hweight64() assembly implementation on x86-32

Nick Desaulniers (1):
      x86/asm/bitops: Use __builtin_clz{l|ll} to evaluate constant expressions

Uros Bizjak (4):
      x86/percpu: Define {raw,this}_cpu_try_cmpxchg{64,128}
      x86/percpu: Define raw_cpu_try_cmpxchg and this_cpu_try_cmpxchg()
      x86/percpu: Use raw_cpu_try_cmpxchg() in preempt_count_set()
      x86/percpu: Do not clobber %rsi in percpu_{try_,}cmpxchg{64,128}_op

Xin Li (Intel) (2):
      x86/entry: Remove unused argument %rsi passed to exc_nmi()
      x86/entry: Fix typos in comments

Zhu Wang (1):
      x86/lib: Address kernel-doc warnings


 arch/x86/entry/entry_64.S       |  10 ++--
 arch/x86/include/asm/bitops.h   |   9 ++++
 arch/x86/include/asm/percpu.h   | 110 +++++++++++++++++++++++++++++++++++++---
 arch/x86/include/asm/preempt.h  |   4 +-
 arch/x86/lib/csum-wrappers_64.c |   5 --
 arch/x86/lib/hweight.S          |  20 +++-----
 6 files changed, 125 insertions(+), 33 deletions(-)