From: Mark Rutland <Mark.Rutland@arm.com>
Date: Fri, 18 Jan 2013 13:42:59 +0000 (+0000)
Subject: ARM: perf: remove unnecessary checks for idx < 0
X-Git-Tag: v3.9-rc1~115^2~11^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8f3b90b585d3e879b03ce2a202da04d59dd5b699;p=pandora-kernel.git

ARM: perf: remove unnecessary checks for idx < 0

We currently check for hwx->idx < 0 in armpmu_read and armpmu_del
unnecessarily. The only case where hwc->idx < 0 is when armpmu_add
fails, in which case the event's state is set to
PERF_EVENT_STATE_INACTIVE.

The perf core will not attempt to read from an event in
PERF_EVENT_STATE_INACTIVE, and so the check in armpmu_read is
unnecessary. Similarly, if perf core cannot add an event it will not
attempt to delete it, so the WARN_ON in armpmu_del is unnecessary.

This patch removes these two redundant checks.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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