sched: kill unused parameter of pick_next_task()

Impact: micro-optimization

Parameter "prev" is not used really.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/sched.c b/kernel/sched.c
index dfae1bf..9fe8e17 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4603,7 +4603,7 @@ static inline void schedule_debug(struct task_struct *prev)
  * Pick up the highest-prio task:
  */
 static inline struct task_struct *
-pick_next_task(struct rq *rq, struct task_struct *prev)
+pick_next_task(struct rq *rq)
 {
        const struct sched_class *class;
        struct task_struct *p;
@@ -4678,7 +4678,7 @@ need_resched_nonpreemptible:
                idle_balance(cpu, rq);
 
        prev->sched_class->put_prev_task(rq, prev);
-       next = pick_next_task(rq, prev);
+       next = pick_next_task(rq);
 
        if (likely(prev != next)) {
                sched_info_switch(prev, next);
@@ -6514,7 +6514,7 @@ static void migrate_dead_tasks(unsigned int dead_cpu)
                if (!rq->nr_running)
                        break;
                update_rq_clock(rq);
-               next = pick_next_task(rq, rq->curr);
+               next = pick_next_task(rq);
                if (!next)
                        break;
                next->sched_class->put_prev_task(rq, next);