}
#ifdef CONFIG_SMP
+ extern int try_to_del_timer_sync(struct timer_list *timer);
extern int del_timer_sync(struct timer_list *timer);
#else
-# define del_timer_sync(t) del_timer(t)
+# define try_to_del_timer_sync(t) del_timer(t)
+# define del_timer_sync(t) del_timer(t)
#endif
#define del_singleshot_timer_sync(t) del_timer_sync(t)