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-rw-r--r--include/linux/perf_event.h1
-rw-r--r--kernel/perf_event.c13
2 files changed, 6 insertions, 8 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index bf85733597ec..8cafa15af60d 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -529,7 +529,6 @@ struct hw_perf_event {
int last_cpu;
};
struct { /* software */
- s64 remaining;
struct hrtimer hrtimer;
};
#ifdef CONFIG_HAVE_HW_BREAKPOINT
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 8ef4ba3bcb1f..1a6cdbf0d091 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -4800,14 +4800,13 @@ static void perf_swevent_start_hrtimer(struct perf_event *event)
hrtimer_init(&hwc->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
hwc->hrtimer.function = perf_swevent_hrtimer;
if (hwc->sample_period) {
- u64 period;
+ s64 period = local64_read(&hwc->period_left);
- if (hwc->remaining) {
- if (hwc->remaining < 0)
+ if (period) {
+ if (period < 0)
period = 10000;
- else
- period = hwc->remaining;
- hwc->remaining = 0;
+
+ local64_set(&hwc->period_left, 0);
} else {
period = max_t(u64, 10000, hwc->sample_period);
}
@@ -4823,7 +4822,7 @@ static void perf_swevent_cancel_hrtimer(struct perf_event *event)
if (hwc->sample_period) {
ktime_t remaining = hrtimer_get_remaining(&hwc->hrtimer);
- hwc->remaining = ktime_to_ns(remaining);
+ local64_set(&hwc->period_left, ktime_to_ns(remaining));
hrtimer_cancel(&hwc->hrtimer);
}