linux-kernel - [PATCH RFC 0/5] x86/asm: Improve code generation

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Message-ID: <cover.1744098446.git.jpoimboe@kernel.org>
Date: Tue,  8 Apr 2025 01:21:13 -0700
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH RFC 0/5] x86/asm: Improve code generation

Some various improvements for inline asm code generation.

The "RFC" is really patches 4 and 5, they propose a more readable format
for alternatives and objtool annotations.  Bikeshedding welcome.

If a general format is agreed upon, we could do similar for other
annotations like WARN/BUG, static branches/calls, etc.

Josh Poimboeuf (5):
  objtool: Remove ANNOTATE_IGNORE_ALTERNATIVE from CLAC/STAC
  objtool, x86/hweight: Remove ANNOTATE_IGNORE_ALTERNATIVE
  noinstr: Use asm_inline() in instrumentation_{begin,end}()
  x86/alternative: Improve code generation readability
  objtool: Improve code generation readability

 arch/x86/include/asm/alternative.h  | 88 ++++++++++++++++++--------
 arch/x86/include/asm/arch_hweight.h |  6 +-
 arch/x86/include/asm/smap.h         | 12 ++--
 include/linux/instrumentation.h     |  4 +-
 include/linux/objtool.h             | 97 ++++++++++++++---------------
 tools/objtool/check.c               | 30 ++++++++-
 6 files changed, 149 insertions(+), 88 deletions(-)

-- 
2.49.0