diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index edd45f6..64522ec 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -194,7 +194,8 @@
 	 * When global broadcasting is active, check if the current
 	 * device is registered as a placeholder for broadcast mode.
 	 * This allows us to handle this x86 misfeature in a generic
-	 * way.
+	 * way. This function also returns !=0 when we keep the
+	 * current active broadcast state for this CPU.
 	 */
 	if (tick_device_uses_broadcast(newdev, cpu))
 		return;