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Revert "ARM: 7556/1: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD" 

This reverts commit 3581fe0ef3.

Fixes to the handling of PERF_EVENT_IOC_PERIOD in the core code mean
we no longer have to play this horrible game.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1385560479-11014-2-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Will Deacon 2013-11-27 13:54:39 +00:00 committed by Ingo Molnar
parent bad7192b84
commit 9450d14fb9
1 changed files with 0 additions and 4 deletions
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4
arch/arm/kernel/perf_event.c
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@ -99,10 +99,6 @@ int armpmu_event_set_period(struct perf_event *event)
s64 period = hwc->sample_period;
int ret = 0;
/* The period may have been changed by PERF_EVENT_IOC_PERIOD */
if (unlikely(period != hwc->last_period))
left = period - (hwc->last_period - left);
if (unlikely(left <= -period)) {
left = period;
local64_set(&hwc->period_left, left);