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Commit bce19369 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

Merge branch 'timers.2014.02.25a' of... 

Merge branch 'timers.2014.02.25a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu

 into timers/core

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parents f96a34e2 aea369b9

kernel/timer.c

+28 −2
Original line number Diff line number Diff line
@@ -81,6 +81,7 @@ struct tvec_base { 
	unsigned long timer_jiffies;

	unsigned long next_timer;

	unsigned long active_timers;

	unsigned long all_timers;

	struct tvec_root tv1;

	struct tvec tv2;

	struct tvec tv3;
@@ -337,6 +338,20 @@ void set_timer_slack(struct timer_list *timer, int slack_hz) 
}

EXPORT_SYMBOL_GPL(set_timer_slack);



/*

 * If the list is empty, catch up ->timer_jiffies to the current time.

 * The caller must hold the tvec_base lock.  Returns true if the list

 * was empty and therefore ->timer_jiffies was updated.

 */

static bool catchup_timer_jiffies(struct tvec_base *base)

{

	if (!base->all_timers) {

		base->timer_jiffies = jiffies;

		return true;

	}

	return false;

}



static void

__internal_add_timer(struct tvec_base *base, struct timer_list *timer)

{
@@ -383,15 +398,17 @@ __internal_add_timer(struct tvec_base *base, struct timer_list *timer) 


static void internal_add_timer(struct tvec_base *base, struct timer_list *timer)

{

	(void)catchup_timer_jiffies(base);

	__internal_add_timer(base, timer);

	/*

	 * Update base->active_timers and base->next_timer

	 */

	if (!tbase_get_deferrable(timer->base)) {

		if (time_before(timer->expires, base->next_timer))

		if (!base->active_timers++ ||

		    time_before(timer->expires, base->next_timer))

			base->next_timer = timer->expires;

		base->active_timers++;

	}

	base->all_timers++;

}



#ifdef CONFIG_TIMER_STATS
@@ -671,6 +688,8 @@ detach_expired_timer(struct timer_list *timer, struct tvec_base *base) 
	detach_timer(timer, true);

	if (!tbase_get_deferrable(timer->base))

		base->active_timers--;

	base->all_timers--;

	(void)catchup_timer_jiffies(base);

}



static int detach_if_pending(struct timer_list *timer, struct tvec_base *base,
@@ -685,6 +704,8 @@ static int detach_if_pending(struct timer_list *timer, struct tvec_base *base, 
		if (timer->expires == base->next_timer)

			base->next_timer = base->timer_jiffies;

	}

	base->all_timers--;

	(void)catchup_timer_jiffies(base);

	return 1;

}
@@ -1153,6 +1174,10 @@ static inline void __run_timers(struct tvec_base *base) 
	struct timer_list *timer;



	spin_lock_irq(&base->lock);

	if (catchup_timer_jiffies(base)) {

		spin_unlock_irq(&base->lock);

		return;

	}

	while (time_after_eq(jiffies, base->timer_jiffies)) {

		struct list_head work_list;

		struct list_head *head = &work_list;
@@ -1566,6 +1591,7 @@ static int init_timers_cpu(int cpu) 
	base->timer_jiffies = jiffies;

	base->next_timer = base->timer_jiffies;

	base->active_timers = 0;

	base->all_timers = 0;

	return 0;

}