From: Mark Rutland <mark.rutland@arm.com>
Date: Tue, 17 May 2011 08:15:38 +0000 (+0100)
Subject: ARM: 6902/1: perf: Remove erroneous check on active_events
X-Git-Tag: v3.0-rc1~328^2~1^3~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57ce9bb39b476accf8fba6e16aea67ed76ea523d;p=pandora-kernel.git

ARM: 6902/1: perf: Remove erroneous check on active_events

When initialising a PMU, there is a check to protect against races with
other CPUs filling all of the available event slots. Since armpmu_add
checks that an event can be scheduled, we do not need to do this at
initialisation time. Furthermore the current code is broken because it
assumes that atomic_inc_not_zero will unconditionally increment
active_counts and then tries to decrement it again on failure.

This patch removes the broken, redundant code.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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