linux-kernel - [PATCH] sched/core: remove rq getting in schedule

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Date:   Tue, 24 Nov 2020 11:41:45 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] sched/core: remove rq getting in schedule_tail

commit dfa50b605c2a ("sched: Make finish_task_switch() return 'struct rq
*'") moved the 'rq' parameter into finish_task_switch, so we don't need
it now in schedule_tail.

Signed-off-by: Alex Shi <alex.shi@...ux.alibaba.com>
Cc: Ingo Molnar <mingo@...hat.com> 
Cc: Peter Zijlstra <peterz@...radead.org> 
Cc: Juri Lelli <juri.lelli@...hat.com> 
Cc: Vincent Guittot <vincent.guittot@...aro.org> 
Cc: Dietmar Eggemann <dietmar.eggemann@....com> 
Cc: Steven Rostedt <rostedt@...dmis.org> 
Cc: Ben Segall <bsegall@...gle.com> 
Cc: Mel Gorman <mgorman@...e.de> 
Cc: Daniel Bristot de Oliveira <bristot@...hat.com> 
Cc: linux-kernel@...r.kernel.org 
---
 kernel/sched/core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 44d526b8d942..ab473fce092b 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4239,7 +4239,6 @@ static struct rq *finish_task_switch(struct task_struct *prev)
 asmlinkage __visible void schedule_tail(struct task_struct *prev)
 	__releases(rq->lock)
 {
-	struct rq *rq;
 
 	/*
 	 * New tasks start with FORK_PREEMPT_COUNT, see there and
@@ -4249,7 +4248,7 @@ asmlinkage __visible void schedule_tail(struct task_struct *prev)
 	 * and the preempt_enable() will end up enabling preemption.
 	 */
 
-	rq = finish_task_switch(prev);
+	finish_task_switch(prev);
 	preempt_enable();
 
 	if (current->set_child_tid)
-- 
2.29.GIT