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Subject[tip:timers/core] timers: Consolidate base->next_timer update
Commit-ID:  facbb4a7efbd658046bf615f03cd97a1504785d8
Gitweb: http://git.kernel.org/tip/facbb4a7efbd658046bf615f03cd97a1504785d8
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Fri, 25 May 2012 22:08:57 +0000
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 6 Jun 2012 13:49:01 +0200
timers: Consolidate base->next_timer update

Another bunch of mindlessly copied code. All callers of
internal_add_timer() except the recascading code updates
base->next_timer.

Move this into internal_add_timer() and let the cascading code call
__internal_add_timer().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20120525214819.189946224@linutronix.de
---
kernel/timer.c | 26 +++++++++++++++-----------
1 files changed, 15 insertions(+), 11 deletions(-)
diff --git a/kernel/timer.c b/kernel/timer.c
index 0f70deb..7207690 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -330,7 +330,8 @@ void set_timer_slack(struct timer_list *timer, int slack_hz)
}
EXPORT_SYMBOL_GPL(set_timer_slack);

-static void internal_add_timer(struct tvec_base *base, struct timer_list *timer)
+static void
+__internal_add_timer(struct tvec_base *base, struct timer_list *timer)
{
unsigned long expires = timer->expires;
unsigned long idx = expires - base->timer_jiffies;
@@ -372,6 +373,17 @@ static void internal_add_timer(struct tvec_base *base, struct timer_list *timer)
list_add_tail(&timer->entry, vec);
}

+static void internal_add_timer(struct tvec_base *base, struct timer_list *timer)
+{
+ __internal_add_timer(base, timer);
+ /*
+ * Update base->next_timer if this is the earliest one.
+ */
+ if (time_before(timer->expires, base->next_timer) &&
+ !tbase_get_deferrable(timer->base))
+ base->next_timer = timer->expires;
+}
+
#ifdef CONFIG_TIMER_STATS
void __timer_stats_timer_set_start_info(struct timer_list *timer, void *addr)
{
@@ -757,9 +769,6 @@ __mod_timer(struct timer_list *timer, unsigned long expires,
}

timer->expires = expires;
- if (time_before(timer->expires, base->next_timer) &&
- !tbase_get_deferrable(timer->base))
- base->next_timer = timer->expires;
internal_add_timer(base, timer);

out_unlock:
@@ -925,9 +934,6 @@ void add_timer_on(struct timer_list *timer, int cpu)
spin_lock_irqsave(&base->lock, flags);
timer_set_base(timer, base);
debug_activate(timer, timer->expires);
- if (time_before(timer->expires, base->next_timer) &&
- !tbase_get_deferrable(timer->base))
- base->next_timer = timer->expires;
internal_add_timer(base, timer);
/*
* Check whether the other CPU is idle and needs to be
@@ -1079,7 +1085,8 @@ static int cascade(struct tvec_base *base, struct tvec *tv, int index)
*/
list_for_each_entry_safe(timer, tmp, &tv_list, entry) {
BUG_ON(tbase_get_base(timer->base) != base);
- internal_add_timer(base, timer);
+ /* No accounting, while moving them */
+ __internal_add_timer(base, timer);
}

return index;
@@ -1706,9 +1713,6 @@ static void migrate_timer_list(struct tvec_base *new_base, struct list_head *hea
timer = list_first_entry(head, struct timer_list, entry);
detach_timer(timer, false);
timer_set_base(timer, new_base);
- if (time_before(timer->expires, new_base->next_timer) &&
- !tbase_get_deferrable(timer->base))
- new_base->next_timer = timer->expires;
internal_add_timer(new_base, timer);
}
}

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