sched: remove duplicate code from sched_fair.c

pick_task_entity() duplicates existing code. This functionality can be
easily obtained using rb_last(). Avoid code duplication by using rb_last().

Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 6c091d6e159d01fb23c0dd786495c533cb005c5b..7abad50d935ff0e348d430d3b24b20060c534123 100644 (file)
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -202,16 +202,13 @@ static struct sched_entity *__pick_next_entity(struct cfs_rq *cfs_rq)
 
 static inline struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq)
 {
-       struct rb_node **link = &cfs_rq->tasks_timeline.rb_node;
-       struct sched_entity *se = NULL;
-       struct rb_node *parent;
-
-       while (*link) {
-               parent = *link;
-               se = rb_entry(parent, struct sched_entity, run_node);
-               link = &parent->rb_right;
-       }
+       struct rb_node *last;
+       struct sched_entity *se;
 
+       last = rb_last(&cfs_rq->tasks_timeline);
+       if (!last)
+               return NULL;
+       se = rb_entry(last, struct sched_entity, run_node);
        return se;
 }