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Commit b67802ea authored by Wang Chen's avatar Wang Chen Committed by Ingo Molnar
Browse files

sched: kill unused parameter of pick_next_task() 



Impact: micro-optimization

Parameter "prev" is not used really.

Signed-off-by: default avatarWang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 72fd455b

kernel/sched.c

+3 −3
Original line number Original line Diff line number Diff line
@@ -4603,7 +4603,7 @@ static inline void schedule_debug(struct task_struct *prev) 
 * Pick up the highest-prio task:

 * Pick up the highest-prio task:

 */

 */

static inline struct task_struct *

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;

	const struct sched_class *class;

	struct task_struct *p;

	struct task_struct *p;
@@ -4678,7 +4678,7 @@ asmlinkage void __sched schedule(void) 
		idle_balance(cpu, rq);

		idle_balance(cpu, rq);





	prev->sched_class->put_prev_task(rq, prev);

	prev->sched_class->put_prev_task(rq, prev);

	next = pick_next_task(rq, prev);

	next = pick_next_task(rq);





	if (likely(prev != next)) {

	if (likely(prev != next)) {

		sched_info_switch(prev, next);

		sched_info_switch(prev, next);
@@ -6514,7 +6514,7 @@ static void migrate_dead_tasks(unsigned int dead_cpu) 
		if (!rq->nr_running)

		if (!rq->nr_running)

			break;

			break;

		update_rq_clock(rq);

		update_rq_clock(rq);

		next = pick_next_task(rq, rq->curr);

		next = pick_next_task(rq);

		if (!next)

		if (!next)

			break;

			break;

		next->sched_class->put_prev_task(rq, next);

		next->sched_class->put_prev_task(rq, next);