linux-kernel - [PATCH RESEND 0/2] kbuild: dead code elimination: ftrace fixes

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Message-ID: <1482396707-14349-1-git-send-email-marcin.nowakowski@imgtec.com>
Date:   Thu, 22 Dec 2016 09:51:45 +0100
From:   Marcin Nowakowski <marcin.nowakowski@...tec.com>
To:     Arnd Bergmann <arnd@...db.de>, <linux-kernel@...r.kernel.org>
CC:     Nicholas Piggin <npiggin@...il.com>
Subject: [PATCH RESEND 0/2] kbuild: dead code elimination: ftrace fixes

Enabling dead code & data elimination currently breaks ftrace operation,
as the __mcount_loc section is removed (as it is not referenced directly
anywhere in the code).
Moreover, there are a lot of entries missing in the __mcount_loc section
as the recordmcount tool doesn't currently properly handle the section
names as created by the use of -ffunction-sections.

The following 2 patches fix that behaviour.
They are based on next-20161208.

Marcin Nowakowski (2):
  kbuild: keep __mcount_loc table through dead code elimination
  recordmcount: fix mcount recording with -ffunction-sections

 include/asm-generic/vmlinux.lds.h |  2 +-
 scripts/Makefile                  |  5 +++++
 scripts/recordmcount.c            | 26 +++++++++++++++++++++++++-
 3 files changed, 31 insertions(+), 2 deletions(-)

-- 
2.7.4