linux-4.4.1/hrtimer_try_to_cancel() の変更点

• 追加された行はこの色です。
• 削除された行はこの色です。
• linux-4.4.1/hrtimer_try_to_cancel() へ行く。
• linux-4.4.1/hrtimer_try_to_cancel() の差分を削除

*参照元 [#w214a055]
#backlinks

*説明 [#b93ca59b]
-パス: [[linux-4.4.1/kernel/time/hrtimer.c]]

-FIXME: これは何？
--説明


**引数 [#bbe94349]
-struct hrtimer *timer
--
--[[linux-4.4.1/htrimer]]


**返り値 [#de416353]
-int
--


**参考 [#o5441097]


*実装 [#l1772ca7]
 /**
  * hrtimer_try_to_cancel - try to deactivate a timer
  * @timer:      hrtimer to stop
  *
  * Returns:
  *  0 when the timer was not active
  *  1 when the timer was active
  * -1 when the timer is currently excuting the callback function and
  *    cannot be stopped
  */
 int hrtimer_try_to_cancel(struct hrtimer *timer)
 {
         struct hrtimer_clock_base *base;
         unsigned long flags;
         int ret = -1;
 
-
--[[linux-4.4.1/hrtimer_clock_base]]

         /*
          * Check lockless first. If the timer is not active (neither
          * enqueued nor running the callback, nothing to do here.  The
          * base lock does not serialize against a concurrent enqueue,
          * so we can avoid taking it.
          */
         if (!hrtimer_active(timer))
                 return 0;
 
-
--[[linux-4.4.1/hrtimer_active()]]

         base = lock_hrtimer_base(timer, &flags);
 
-
--[[linux-4.4.1/lock_hrtimer_base()]]

         if (!hrtimer_callback_running(timer))
                 ret = remove_hrtimer(timer, base, false);
 
-
--[[linux-4.4.1/hrtimer_callback_running()]]
--[[linux-4.4.1/remove_hrtimer()]]

         unlock_hrtimer_base(timer, &flags);
 
-
--[[linux-4.4.1/unlock_hrtimer_base()]]

         return ret;
 
 }
 EXPORT_SYMBOL_GPL(hrtimer_try_to_cancel);
-
--[[linux-4.4.1/EXPORT_SYMBOL_GPL()]]


*コメント [#nfb2b190]