linux-kernel - [PATCH 0/6] objtool: AUTOFDO fixes + alias improvements

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Message-ID: <cover.1763671318.git.jpoimboe@kernel.org>
Date: Thu, 20 Nov 2025 12:52:14 -0800
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Rong Xu <xur@...gle.com>,
	Han Shen <shenhan@...gle.com>,
	Sriraman Tallam <tmsriram@...gle.com>,
	Krzysztof Pszeniczny <kpszeniczny@...gle.com>
Subject: [PATCH 0/6] objtool: AUTOFDO fixes + alias improvements

For tip/objtool/core.

- Patches 1 and 2 fix some issues which were found when testing with
  AutoFDO .cold functions.

- Patches 3-5 make improvements to the handling of symbol aliases.

- Patch 6 uses the alias infrastructure to simplify the .cold
  parent/child correlation code.

Josh Poimboeuf (6):
  objtool: Support Clang AUTOFDO .cold functions
  objtool: Fix .cold function detection for duplicate symbols
  objtool: Don't alias undefined symbols
  objtool: Return canonical symbol when aliases exist in symbol finding
    helpers
  objtool: Skip non-canonical aliased symbols in add_jump_table_alts()
  objtool: Remove second pass of .cold function correlation

 tools/objtool/check.c               | 25 +---------
 tools/objtool/elf.c                 | 71 +++++++++++++++++++++--------
 tools/objtool/include/objtool/elf.h |  2 +-
 3 files changed, 55 insertions(+), 43 deletions(-)

-- 
2.51.1