perf: Introduce is_sampling_event()

and use it when appropriate.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1290525705-6265-1-git-send-email-fbuihuu@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index de2c41758e29..cbf04cc1e630 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -969,6 +969,11 @@ extern int perf_event_overflow(struct perf_event *event, int nmi,
                                  struct perf_sample_data *data,
                                  struct pt_regs *regs);
 
+static inline bool is_sampling_event(struct perf_event *event)
+{
+        return event->attr.sample_period != 0;
+}
+
 /*
  * Return 1 for a software event, 0 for a hardware event
  */