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From:   Scott Wood <swood@redhat.com>
To:     Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc:     linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org,
        Steven Rostedt <rostedt@goodmis.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Scott Wood <swood@redhat.com>
Subject: [PATCH RT 2/2] sched: migrate_enable: Remove __schedule() call
Date:   Fri, 24 Jan 2020 06:11:47 -0500
Message-Id: <1579864307-13093-2-git-send-email-swood@redhat.com>
In-Reply-To: <1579864307-13093-1-git-send-email-swood@redhat.com>
References: <1579864307-13093-1-git-send-email-swood@redhat.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

We can rely on preempt_enable() to schedule.  Besides simplifying the
code, this potentially allows sequences such as the following to be
permitted:

migrate_disable();
preempt_disable();
migrate_enable();
preempt_enable();

Suggested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Scott Wood <swood@redhat.com>
---
 kernel/sched/core.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 7713e9c34ad1..ea0536461981 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -8248,7 +8248,6 @@ void migrate_enable(void)
 
 		stop_one_cpu_nowait(task_cpu(p), migration_cpu_stop,
 				    arg, work);
-		__schedule(true);
 	}
 
 out:
-- 
1.8.3.1