linux-kernel - [tip: sched/core] sched/core: Remove redundant 'preempt' param from sched_class->yield_to

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Date:   Tue, 16 Jun 2020 12:21:56 -0000
From:   "tip-bot2 for Dietmar Eggemann" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Dietmar Eggemann <dietmar.eggemann@....com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        x86 <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [tip: sched/core] sched/core: Remove redundant 'preempt' param from
 sched_class->yield_to_task()

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     0900acf2d8273f79432a4ded122ad5a265e85783
Gitweb:        https://git.kernel.org/tip/0900acf2d8273f79432a4ded122ad5a265e85783
Author:        Dietmar Eggemann <dietmar.eggemann@....com>
AuthorDate:    Wed, 03 Jun 2020 10:03:02 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 15 Jun 2020 14:10:01 +02:00

sched/core: Remove redundant 'preempt' param from sched_class->yield_to_task()

Commit 6d1cafd8b56e ("sched: Resched proper CPU on yield_to()") moved
the code to resched the CPU from yield_to_task_fair() to yield_to()
making the preempt parameter in sched_class->yield_to_task()
unnecessary. Remove it. No other sched_class implements yield_to_task().

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@....com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/20200603080304.16548-3-dietmar.eggemann@arm.com
---
 kernel/sched/core.c  | 2 +-
 kernel/sched/fair.c  | 2 +-
 kernel/sched/sched.h | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 8f36032..9c89b0e 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5810,7 +5810,7 @@ again:
 	if (task_running(p_rq, p) || p->state)
 		goto out_unlock;
 
-	yielded = curr->sched_class->yield_to_task(rq, p, preempt);
+	yielded = curr->sched_class->yield_to_task(rq, p);
 	if (yielded) {
 		schedstat_inc(rq->yld_count);
 		/*
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index cbcb2f7..6a4dab2 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7157,7 +7157,7 @@ static void yield_task_fair(struct rq *rq)
 	set_skip_buddy(se);
 }
 
-static bool yield_to_task_fair(struct rq *rq, struct task_struct *p, bool preempt)
+static bool yield_to_task_fair(struct rq *rq, struct task_struct *p)
 {
 	struct sched_entity *se = &p->se;
 
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 1d4e94c..8d5d068 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1748,7 +1748,7 @@ struct sched_class {
 	void (*enqueue_task) (struct rq *rq, struct task_struct *p, int flags);
 	void (*dequeue_task) (struct rq *rq, struct task_struct *p, int flags);
 	void (*yield_task)   (struct rq *rq);
-	bool (*yield_to_task)(struct rq *rq, struct task_struct *p, bool preempt);
+	bool (*yield_to_task)(struct rq *rq, struct task_struct *p);
 
 	void (*check_preempt_curr)(struct rq *rq, struct task_struct *p, int flags);