perf: Simplify __perf_event_read
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>
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index af150bb..028619d 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1526,10 +1526,9 @@
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)