linux-kernel - [PATCH 0/3] unwind

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Message-ID: <20251125164349.2592874-1-jremus@linux.ibm.com>
Date: Tue, 25 Nov 2025 17:43:46 +0100
From: Jens Remus <jremus@...ux.ibm.com>
To: linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
        x86@...nel.org, Steven Rostedt <rostedt@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>
Cc: Jens Remus <jremus@...ux.ibm.com>, Josh Poimboeuf <jpoimboe@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Indu Bhagat <indu.bhagat@...cle.com>,
        "Jose E. Marchesi" <jemarch@....org>,
        Heiko Carstens <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>,
        Ilya Leoshkevich <iii@...ux.ibm.com>
Subject: [PATCH 0/3] unwind_user: Cleanups

This patch series applies on top of Peter Zijlstras' latest unwind user
enhancements (and perf deferred callchain support) on his tip perf/core
branch:

  git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf/core

Which has already been merged to tip/master and linux-next/master.

Patch 1 enhances a few comments in unwind_user_next_common().

Patch 2 gets rid of an ifdef in unwind_user_next_fp() by moving it to
linux/unwind_user.h.

Patch 3 ensures the x86 unwind_user_word_size() implementation is
available whenever config option UNWIND_USER is enabled, as it is
required by unwind user in general and is not specific to its FP
unwind method.

Regards,
Jens

Jens Remus (3):
  unwind_user: Enhance comments on get CFA, FP, and RA
  unwind_user/fp: Use dummies instead of ifdef
  x86/unwind_user: Guard unwind_user_word_size() by UNWIND_USER

 arch/x86/include/asm/unwind_user.h | 28 ++++++++++++++++------------
 include/linux/unwind_user.h        | 14 +++++++++++---
 kernel/unwind/user.c               | 12 ++++--------
 3 files changed, 31 insertions(+), 23 deletions(-)

-- 
2.51.0