linux-kernel - [RFC][PATCH 04/10] sched/fair: Cleanup pick_task

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Date: Fri, 05 Apr 2024 12:27:58 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: mingo@...hat.com,
 peterz@...radead.org,
 juri.lelli@...hat.com,
 vincent.guittot@...aro.org,
 dietmar.eggemann@....com,
 rostedt@...dmis.org,
 bsegall@...gle.com,
 mgorman@...e.de,
 bristot@...hat.com,
 vschneid@...hat.com,
 linux-kernel@...r.kernel.org
Cc: kprateek.nayak@....com,
 wuyun.abel@...edance.com,
 tglx@...utronix.de,
 efault@....de
Subject: [RFC][PATCH 04/10] sched/fair: Cleanup pick_task_fair()s curr

With 4c456c9ad334 ("sched/fair: Remove unused 'curr' argument from
pick_next_entity()") curr is no longer being used, so no point in
clearing it.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 kernel/sched/fair.c |   10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -8427,15 +8427,9 @@ static struct task_struct *pick_task_fai
 		return NULL;
 
 	do {
-		struct sched_entity *curr = cfs_rq->curr;
-
 		/* When we pick for a remote RQ, we'll not have done put_prev_entity() */
-		if (curr) {
-			if (curr->on_rq)
-				update_curr(cfs_rq);
-			else
-				curr = NULL;
-		}
+		if (cfs_rq->curr && cfs_rq->curr->on_rq)
+			update_curr(cfs_rq);
 
 		if (unlikely(check_cfs_rq_runtime(cfs_rq)))
 			goto again;