linux-kernel - [PATCH v2 0/2] ftrace/recordmcount: Handle object files without section symbols

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Message-Id: <cover.1651166001.git.naveen.n.rao@linux.vnet.ibm.com>
Date:   Thu, 28 Apr 2022 22:49:50 +0530
From:   "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        <linux-kernel@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
        llvm@...ts.linux.dev
Subject: [PATCH v2 0/2] ftrace/recordmcount: Handle object files without section symbols

This is v2 of the series posted at:
http://lkml.kernel.org/r/cover.1651047542.git.naveen.n.rao@linux.vnet.ibm.com

For v2, the first patch is slightly modified to skip the loop, rather 
than depending on addr == 0 to do so. The second patch is updated to 
make this behavior be opt-in by architectures so that they can validate 
the read mcount locations.

- Naveen


Naveen N. Rao (2):
  ftrace: Drop duplicate mcount locations
  ftrace: recordmcount: Handle sections with no non-weak symbols

 Makefile                           |  4 ++
 arch/powerpc/Kconfig               |  1 +
 arch/powerpc/include/asm/ftrace.h  |  8 +--
 arch/powerpc/kernel/trace/ftrace.c | 11 ++++
 kernel/trace/Kconfig               |  6 ++
 kernel/trace/ftrace.c              | 13 ++++-
 scripts/Makefile.build             |  3 +
 scripts/recordmcount.c             |  6 +-
 scripts/recordmcount.h             | 94 ++++++++++++++++++++++++++----
 9 files changed, 125 insertions(+), 21 deletions(-)


base-commit: 83d8a0d166119de813cad27ae7d61f54f9aea707
-- 
2.35.1