clockevent: simplify list operations

list_for_each_safe() suffices here.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 3e59fce..1d327f6 100644 (file)
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -218,6 +218,8 @@ void clockevents_exchange_device(struct clock_event_device *old,
  */
 void clockevents_notify(unsigned long reason, void *arg)
 {
+       struct list_head *node, *tmp;
+
        spin_lock(&clockevents_lock);
        clockevents_do_notify(reason, arg);
 
@@ -227,13 +229,8 @@ void clockevents_notify(unsigned long reason, void *arg)
                 * Unregister the clock event devices which were
                 * released from the users in the notify chain.
                 */
-               while (!list_empty(&clockevents_released)) {
-                       struct clock_event_device *dev;
-
-                       dev = list_entry(clockevents_released.next,
-                                        struct clock_event_device, list);
-                       list_del(&dev->list);
-               }
+               list_for_each_safe(node, tmp, &clockevents_released)
+                       list_del(node);
                break;
        default:
                break;