From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Fri, 7 Oct 2011 11:36:40 +0000 (+0200)
Subject: perf/x86: Fix PEBS instruction unwind
X-Git-Tag: v3.2-rc5~42^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57d1c0c03c6b48b2b96870d831b9ce6b917f53ac;p=pandora-kernel.git

perf/x86: Fix PEBS instruction unwind

Masami spotted that we always try to decode the instruction stream as
64bit instructions when running a 64bit kernel, this doesn't work for
ia32-compat proglets.

Use TIF_IA32 to detect if we need to use the 32bit instruction
decoder.

Reported-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: stable@kernel.org
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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