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perf: export perf_event_refresh() to modules

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KVM needs one-shot samples, since a PMC programmed to -X will fire after X
events and then again after 2^40 events (i.e. variable period).

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1309362157-6596-4-git-send-email-avi@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Avi Kivity
2011-06-29 18:42:37 +03:00
committed by Ingo Molnar
parent 0af3ac1fdb
commit 26ca5c11fb
2 changed files with 7 additions and 1 deletions
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3
kernel/events/core.c
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@ -1764,7 +1764,7 @@ out:
raw_spin_unlock_irq(&ctx->lock);
}
static int perf_event_refresh(struct perf_event *event, int refresh)
int perf_event_refresh(struct perf_event *event, int refresh)
{
/*
* not supported on inherited events
@ -1777,6 +1777,7 @@ static int perf_event_refresh(struct perf_event *event, int refresh)
return 0;
}
EXPORT_SYMBOL_GPL(perf_event_refresh);
static void ctx_sched_out(struct perf_event_context *ctx,
struct perf_cpu_context *cpuctx,