diff --git a/kernel/events/core.c b/kernel/events/core.c
index 8f3d23cc8..bf79fee07 100755
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -4017,7 +4017,11 @@ static void perf_adjust_period(struct perf_event *event, u64 nsec, u64 count, bo
 	period = perf_calculate_period(event, nsec, count);
 
 	delta = (s64)(period - hwc->sample_period);
-	delta = (delta + 7) / 8; /* low pass filter */
+	if (delta >= 0)
+		delta += 7;
+	else
+		delta -= 7;
+	delta /= 8; /* low pass filter */
 
 	sample_period = hwc->sample_period + delta;