hrtimer: Make use of timerqueue_add/del return values

Use the return value instead of reevaluating the information.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203501.658152945@linutronix.deSigned-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/time/hrtimer.c

@@ -842,7 +842,6 @@ static int enqueue_hrtimer(struct hrtimer *timer,
 {
 	debug_activate(timer);
 
-	timerqueue_add(&base->active, &timer->node);
 	base->cpu_base->active_bases |= 1 << base->index;
 
 	/*
@@ -851,7 +850,7 @@ static int enqueue_hrtimer(struct hrtimer *timer,
 	 */
 	timer->state |= HRTIMER_STATE_ENQUEUED;
 
-	return (&timer->node == base->active.next);
+	return timerqueue_add(&base->active, &timer->node);
 }
 
 /*
@@ -875,8 +874,7 @@ static void __remove_hrtimer(struct hrtimer *timer,
 		goto out;
 
 	next_timer = timerqueue_getnext(&base->active);
-	timerqueue_del(&base->active, &timer->node);
-	if (!timerqueue_getnext(&base->active))
+	if (!timerqueue_del(&base->active, &timer->node))
 		cpu_base->active_bases &= ~(1 << base->index);
 
 	if (&timer->node == next_timer) {