linux-4.4.1/hrtimer_start_range_ns() 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_start_range_ns() へ行く。
• linux-4.4.1/hrtimer_start_range_ns() の差分を削除

*参照元 [#abf3d859]
#backlinks

*説明 [#v71519a8]
-パス: [[linux-4.4.1/kernel/time/hrtimer.c]]

-FIXME: これは何？
--説明


**引数 [#i618a3cb]
-struct hrtimer *timer
--
--[[linux-4.4.1/hrtimer]]
-ktime_t tim
--
--[[linux-4.4.1/ktime_t]]
-unsigned long delta_ns
--
-const enum hrtimer_mode mode
--
--[[linux-4.4.1/hrtimer_mode]]


**返り値 [#o01ac7f4]
-
--

**参考 [#r55b01cc]


*実装 [#a1352783]
 /**
  * hrtimer_start_range_ns - (re)start an hrtimer on the current CPU
  * @timer:      the timer to be added
  * @tim:        expiry time
  * @delta_ns:   "slack" range for the timer
  * @mode:       expiry mode: absolute (HRTIMER_MODE_ABS) or
  *              relative (HRTIMER_MODE_REL)
  */
 void hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
                             unsigned long delta_ns, const enum hrtimer_mode mode)
 {
         struct hrtimer_clock_base *base, *new_base;
         unsigned long flags;
         int leftmost;
 
-
--[[linux-4.4.1/hrtimer_clock_base]]

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

         /* Remove an active timer from the queue: */
         remove_hrtimer(timer, base, true);
 
-
--[[linux-4.4.1/remove_hrtimer()]]

         if (mode & HRTIMER_MODE_REL) {
                 tim = ktime_add_safe(tim, base->get_time());
-
--[[linux-4.4.1/ktimer_add_safe()]]

                 /*
                  * CONFIG_TIME_LOW_RES is a temporary way for architectures
                  * to signal that they simply return xtime in
                  * do_gettimeoffset(). In this case we want to round up by
                  * resolution when starting a relative timer, to avoid short
                  * timeouts. This will go away with the GTOD framework.
                  */
 #ifdef CONFIG_TIME_LOW_RES
                 tim = ktime_add_safe(tim, ktime_set(0, hrtimer_resolution));
 #endif
-
--[[linux-4.4.1/CONFIG_TIME_LOW_RES]]
--[[linux-4.4.1/ktime_set()]]
--[[linux-4.4.1/hrtimer_resolution(global)]]

         }
 
         hrtimer_set_expires_range_ns(timer, tim, delta_ns);
 
-
--[[linux-4.4.1/hrtimer_set_expires_range_ns()]]

         /* Switch the timer base, if necessary: */
         new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED);
 
-
--[[linux-4.4.1/switch_hrtimer_base()]]

         timer_stats_hrtimer_set_start_info(timer);
 
-
--[[linux-4.4.1/timer_stats_hrtimer_set_start_info()]]

         leftmost = enqueue_hrtimer(timer, new_base);
         if (!leftmost)
                 goto unlock;
 
-
--[[linux-4.4.1/enqueue_hrtimer()]]

         if (!hrtimer_is_hres_active(timer)) {
-
--[[linux-4.4.1/hrtimer_is_hres_active()]]

                 /*
                  * Kick to reschedule the next tick to handle the new timer
                  * on dynticks target.
                  */
                 if (new_base->cpu_base->nohz_active)
                         wake_up_nohz_cpu(new_base->cpu_base->cpu);
-
--[[linux-4.4.1/wake_up_nohz_cpu()]]

         } else {
                 hrtimer_reprogram(timer, new_base);
-
--[[linux-4.4.1/hrtimer_reprogram()]]

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

 }
 EXPORT_SYMBOL_GPL(hrtimer_start_range_ns);
-
--[[linux-4.4.1/EXPORT_SYMBOL_GPL()]]


*コメント [#td97e93a]