linux-kernel - [PATCH 10/16] hrtimer: make enqueue

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Date:	Fri, 28 Mar 2014 17:11:29 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	tglx@...utronix.de
Cc:	linaro-kernel@...ts.linaro.org, linux-kernel@...r.kernel.org,
	fweisbec@...il.com, linaro-networking@...aro.org,
	Arvind.Chauhan@....com, Viresh Kumar <viresh.kumar@...aro.org>
Subject: [PATCH 10/16] hrtimer: make enqueue_hrtimer() return void

enqueue_hrtimer() routine is called from three places and only one of them
effectively uses its return value. Also, by its name enqueue_hrtimer() isn't
supposed to return "if the queued timer is the leftmost". So it makes more sense
to separate this routine into two parts, first one enqueues a timer and the
other one tells if the timer is leftmost or not.

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 include/linux/hrtimer.h |  5 +++++
 kernel/hrtimer.c        | 11 +++++------
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 377023b..7ca9fd0 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -263,6 +263,11 @@ static inline ktime_t hrtimer_expires_remaining(const struct hrtimer *timer)
 	return ktime_sub(timer->node.expires, timer->base->get_time());
 }
 
+static inline int hrtimer_is_leftmost(struct hrtimer *timer)
+{
+	return &timer->node == timer->base->active.next;
+}
+
 #ifdef CONFIG_HIGH_RES_TIMERS
 struct clock_event_device;
 
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 7d85b8f..2702185 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -844,7 +844,7 @@ EXPORT_SYMBOL_GPL(hrtimer_forward);
  *
  * Returns 1 when the new timer is the leftmost timer in the tree.
  */
-static int enqueue_hrtimer(struct hrtimer *timer)
+static void enqueue_hrtimer(struct hrtimer *timer)
 {
 	struct hrtimer_clock_base *base = timer->base;
 
@@ -858,8 +858,6 @@ static int enqueue_hrtimer(struct hrtimer *timer)
 	 * state of a possibly running callback.
 	 */
 	timer->state |= HRTIMER_STATE_ENQUEUED;
-
-	return (&timer->node == base->active.next);
 }
 
 /*
@@ -936,7 +934,7 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
 {
 	struct hrtimer_clock_base *base, *new_base;
 	unsigned long flags;
-	int ret, leftmost;
+	int ret;
 
 	lock_hrtimer_base(timer, &flags);
 	base = timer->base;
@@ -966,7 +964,7 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
 
 	timer_stats_hrtimer_set_start_info(timer);
 
-	leftmost = enqueue_hrtimer(timer);
+	enqueue_hrtimer(timer);
 
 	/*
 	 * Only allow reprogramming if the new base is on this CPU.
@@ -974,7 +972,8 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
 	 *
 	 * XXX send_remote_softirq() ?
 	 */
-	if (leftmost && new_base->cpu_base == &__get_cpu_var(hrtimer_bases)
+	if (hrtimer_is_leftmost(timer) &&
+	    new_base->cpu_base == &__get_cpu_var(hrtimer_bases)
 		&& hrtimer_enqueue_reprogram(timer)) {
 		if (wakeup) {
 			/*
-- 
1.7.12.rc2.18.g61b472e

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