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ARM: perf: remove mysterious compiler barrier

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There's a rather strange compiler barrier in the PMU disabling code
which was presumably placed there by aliens. There's no valid reason for
the barrier and one can only suspect that it's up to no good.

This patch removes it before it has a chance to spread.

Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Will Deacon 2012-07-28 16:44:38 +01:00
parent df3d17e068
commit 9f44f9a234
1 changed files with 0 additions and 1 deletions
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arch/arm/kernel/perf_event.c
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@ -223,7 +223,6 @@ armpmu_stop(struct perf_event *event, int flags)
*/
if (!(hwc->state & PERF_HES_STOPPED)) {
armpmu->disable(hwc, hwc->idx);
barrier(); /* why? */
armpmu_event_update(event, hwc, hwc->idx);
hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;
}