[004/146] rcutorture: make use of the helper function kthread_run_on_cpu()

Commit Message

Andrew Morton Jan. 14, 2022, 10:03 p.m. UTC

From: Cai Huoqing <[e-mail]>
Subject: rcutorture: make use of the helper function kthread_run_on_cpu()

Replace kthread_create_on_node/kthread_bind/wake_up_process() with
kthread_run_on_cpu() to simplify the code.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Cai Huoqing <[e-mail]>
Cc: Bernard Metzler <[e-mail]>
Cc: Daniel Bristot de Oliveira <[e-mail]>
Cc: Davidlohr Bueso <[e-mail]>
Cc: Doug Ledford <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Jason Gunthorpe <[e-mail]>
Cc: Joel Fernandes (Google) <[e-mail]>
Cc: Josh Triplett <[e-mail]>
Cc: Lai Jiangshan <[e-mail]>
Cc: Mathieu Desnoyers <[e-mail]>
Cc: "Paul E . McKenney" <[e-mail]>
Cc: Steven Rostedt <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 kernel/rcu/rcutorture.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

Patch

--- a/kernel/rcu/rcutorture.c~rcutorture-make-use-of-the-helper-function-kthread_run_on_cpu
+++ a/kernel/rcu/rcutorture.c
@@ -1992,9 +1992,8 @@  static int rcutorture_booster_init(unsig
 	mutex_lock(&boost_mutex);
 	rcu_torture_disable_rt_throttle();
 	VERBOSE_TOROUT_STRING("Creating rcu_torture_boost task");
-	boost_tasks[cpu] = kthread_create_on_node(rcu_torture_boost, NULL,
-						  cpu_to_node(cpu),
-						  "rcu_torture_boost");
+	boost_tasks[cpu] = kthread_run_on_cpu(rcu_torture_boost, NULL,
+					      cpu, "rcu_torture_boost_%u");
 	if (IS_ERR(boost_tasks[cpu])) {
 		retval = PTR_ERR(boost_tasks[cpu]);
 		VERBOSE_TOROUT_STRING("rcu_torture_boost task create failed");
@@ -2003,8 +2002,6 @@  static int rcutorture_booster_init(unsig
 		mutex_unlock(&boost_mutex);
 		return retval;
 	}
-	kthread_bind(boost_tasks[cpu], cpu);
-	wake_up_process(boost_tasks[cpu]);
 	mutex_unlock(&boost_mutex);
 	return 0;
 }