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perf: Simplify __perf_event_read

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cpuctx is always active, task context is always active for
current

the previous condition verifies that if its a task context its
for current, hence we can assume ctx->is_active.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20091120212509.000272254@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2009-11-20 22:19:53 +01:00 committed by Ingo Molnar
parent 3dbebf15c5
commit 58e5ad1de3
1 changed files with 2 additions and 3 deletions
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5
kernel/perf_event.c
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@ -1526,10 +1526,9 @@ static void __perf_event_read(void *info)
if (ctx->task && cpuctx->task_ctx != ctx)
return;
if (ctx->is_active)
update_context_time(ctx);
event->pmu->read(event);
update_context_time(ctx);
update_event_times(event);
event->pmu->read(event);
}
static u64 perf_event_read(struct perf_event *event)