Updated comment to explain that `dev` is used for scheduling
wake-up events.

Signed-off-by: Zhan Xusheng <zhanxusheng@xiaomi.com>
---
 kernel/time/alarmtimer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 069d93bfb0c7..2548292b207d 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -208,7 +208,7 @@ EXPORT_SYMBOL_GPL(alarm_expires_remaining);
 #ifdef CONFIG_RTC_CLASS
 /**
  * alarmtimer_suspend - Suspend time callback
- * @dev: unused
+ * @dev: the device that triggered the suspend, used for wake-up event
  *
  * When we are going into suspend, we look through the bases
  * to see which is the soonest timer to expire. We then
-- 
2.43.0