From: Will Deacon Date: Wed, 27 Nov 2013 13:54:39 +0000 (+0000) Subject: Revert "ARM: 7556/1: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD" X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9450d14fb959336803e5209119eb422b667b96aa;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git Revert "ARM: 7556/1: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD" This reverts commit 3581fe0ef37ce12ac7a4f74831168352ae848edc. 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 Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1385560479-11014-2-git-send-email-will.deacon@arm.com Signed-off-by: Ingo Molnar --- diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index bc3f2efa0d86..789d846a9184 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -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);