From: Will Deacon <will.deacon@arm.com>
Date: Tue, 11 Feb 2014 18:08:41 +0000 (+0000)
Subject: ARM: perf: hook up perf_sample_event_took around pmu irq handling
X-Git-Tag: v3.15-rc1~82^2^2~1^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f5092e72cc25a6a5785308270e0085b2b2772cc;p=pandora-kernel.git

ARM: perf: hook up perf_sample_event_took around pmu irq handling

Since we indirect all of our PMU IRQ handling through a dispatcher, it's
trivial to hook up perf_sample_event_took to prevent applications such
as oprofile from generating interrupt storms due to an unrealisticly
low sample period.

Reported-by: Robert Richter <rric@kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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