From: Jed Davis <jld@mozilla.com>
Date: Thu, 20 Jun 2013 09:16:29 +0000 (+0100)
Subject: ARM: 7765/1: perf: Record the user-mode PC in the call chain.
X-Git-Tag: v3.2.49~48
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8c7c7cec2608c2a9cfbc4153a79b0dbae9d7a801;p=pandora-kernel.git

ARM: 7765/1: perf: Record the user-mode PC in the call chain.

commit c5f927a6f62196226915f12194c9d0df4e2210d7 upstream.

With this change, we no longer lose the innermost entry in the user-mode
part of the call chain.  See also the x86 port, which includes the ip.

It's possible to partially work around this problem by post-processing
the data to use the PERF_SAMPLE_IP value, but this works only if the CPU
wasn't in the kernel when the sample was taken.

Signed-off-by: Jed Davis <jld@mozilla.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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