linux-kernel - [PATCH 0/2] perf: perf_arch_fetch_regs

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Date:	Fri, 21 May 2010 10:11:15 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	David Miller <davem@...emloft.net>
Subject: [PATCH 0/2] perf: perf_arch_fetch_regs_caller API change

Hi,

I did some updates in this function, we don't need anymore
to skip further the first caller now. So I think it's worth
the simplification to lower the overhead in the tracing fast
path.

I took Paul updates for PowerPc and I did the changes on x86.
But I'm clearly useless about the sparc part, I'm still confused
about these window things. So all I did in this arch is to
wrap the older API with the new one, always passing the skip to 1.
I suspect David can be more useful than me to do a real change there :)

Tell me what you think,

Thanks.

Frederic Weisbecker (2):
  x86: Unify dumpstack.h and stacktrace.h
  perf: Drop the skip argument from perf_arch_fetch_regs_caller

 arch/powerpc/include/asm/perf_event.h |   12 +++++++
 arch/powerpc/kernel/misc.S            |   26 ---------------
 arch/sparc/include/asm/perf_event.h   |    4 ++
 arch/sparc/kernel/helpers.S           |    6 ++--
 arch/x86/include/asm/perf_event.h     |    9 +++++
 arch/x86/include/asm/stacktrace.h     |   49 ++++++++++++++++++++++++++++
 arch/x86/kernel/cpu/perf_event.c      |   14 --------
 arch/x86/kernel/dumpstack.c           |    1 -
 arch/x86/kernel/dumpstack.h           |   56 ---------------------------------
 arch/x86/kernel/dumpstack_32.c        |    2 -
 arch/x86/kernel/dumpstack_64.c        |    1 -
 arch/x86/kernel/stacktrace.c          |    7 ++--
 include/linux/perf_event.h            |   32 ++++--------------
 include/trace/ftrace.h                |    2 +-
 kernel/perf_event.c                   |    5 ---
 kernel/trace/trace_event_perf.c       |    2 -
 16 files changed, 89 insertions(+), 139 deletions(-)
 delete mode 100644 arch/x86/kernel/dumpstack.h

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