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Subject[PATCH 09/15] perf: optimize __perf_event_read()
Both callers actually have IRQs disabled, no need doing so again.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
kernel/perf_event.c | 3 ---
1 file changed, 3 deletions(-)
Index: linux-2.6/kernel/perf_event.c
===================================================================
--- linux-2.6.orig/kernel/perf_event.c
+++ linux-2.6/kernel/perf_event.c
@@ -1517,7 +1517,6 @@ static void __perf_event_read(void *info
struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
struct perf_event *event = info;
struct perf_event_context *ctx = event->ctx;
- unsigned long flags;

/*
* If this is a task context, we need to check whether it is
@@ -1529,12 +1528,10 @@ static void __perf_event_read(void *info
if (ctx->task && cpuctx->task_ctx != ctx)
return;

- local_irq_save(flags);
if (ctx->is_active)
update_context_time(ctx);
event->pmu->read(event);
update_event_times(event);
- local_irq_restore(flags);
}

static u64 perf_event_read(struct perf_event *event)
--



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