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-rw-r--r--kernel/perf_event.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 31d6afe9259..ff86c558af4 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1507,6 +1507,9 @@ do { \
divisor = nsec * frequency;
}
+ if (!divisor)
+ return dividend;
+
return div64_u64(dividend, divisor);
}
@@ -1529,7 +1532,7 @@ static int perf_event_start(struct perf_event *event)
static void perf_adjust_period(struct perf_event *event, u64 nsec, u64 count)
{
struct hw_perf_event *hwc = &event->hw;
- u64 period, sample_period;
+ s64 period, sample_period;
s64 delta;
period = perf_calculate_period(event, nsec, count);