linux-kernel - [PATCH v2 0/2] x86: Enable the deferred unwinding infrastructure

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Message-ID: <20250827193644.527334838@kernel.org>
Date: Wed, 27 Aug 2025 15:36:44 -0400
From: Steven Rostedt <rostedt@...nel.org>
To: linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org,
 x86@...nel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
 Mark Rutland <mark.rutland@....com>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Thomas Gleixner <tglx@...utronix.de>,
 Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>,
 Dave Hansen <dave.hansen@...ux.intel.com>,
 Peter Zijlstra <peterz@...radead.org>,
 Linus Torvalds <torvalds@...ux-foundation.org>,
 Josh Poimboeuf <jpoimboe@...nel.org>
Subject: [PATCH v2 0/2] x86: Enable the deferred unwinding infrastructure

This enables deferred unwinding for x86.

Changes since v1: https://lore.kernel.org/linux-trace-kernel/20250820190546.172023727@kernel.org

- Added #include <linux/compat.h> to use user_64bit_mode() in
  unwind_user.h. When adding this to the ftrace code, it failed to build
  due to the missing header.

Josh Poimboeuf (1):
      unwind_user/x86: Enable frame pointer unwinding on x86

Steven Rostedt (1):
      unwind deferred/x86: Do not defer stack tracing for compat tasks

----
 arch/x86/Kconfig                   |  1 +
 arch/x86/include/asm/unwind_user.h | 23 +++++++++++++++++++++++
 include/linux/unwind_deferred.h    |  5 +++++
 kernel/unwind/deferred.c           |  3 +++
 4 files changed, 32 insertions(+)
 create mode 100644 arch/x86/include/asm/unwind_user.h