[PATCH] rcu-tasks: Remove unnecessary smp_store operations in the cblist_init_generic()

[Zqiang]

The cblist_init_generic() is executed during the CPU early boot
phase due to commit:30ef09635b9e ("rcu-tasks: Initialize callback
lists at rcu_init() time"), at this time, only one boot CPU is
online. this commit therefore use WRITE_ONCE() to replace the
smp_store_release() to assigning rtp->percpu_enqueue_lim in the
cblist_init_generic().

Signed-off-by: Zqiang <qiang.zh...@linux.dev>
---
 kernel/rcu/tasks.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
index 76f952196a29..f763f60d5e50 100644
--- a/kernel/rcu/tasks.h
+++ b/kernel/rcu/tasks.h
@@ -292,7 +292,7 @@ static void cblist_init_generic(struct rcu_tasks *rtp)
                shift++;
        WRITE_ONCE(rtp->percpu_enqueue_shift, shift);
        WRITE_ONCE(rtp->percpu_dequeue_lim, lim);
-       smp_store_release(&rtp->percpu_enqueue_lim, lim);
+       WRITE_ONCE(rtp->percpu_enqueue_lim, lim);
 
        pr_info("%s: Setting shift to %d and lim to %d rcu_task_cb_adjust=%d 
rcu_task_cpu_ids=%d.\n",
                        rtp->name, data_race(rtp->percpu_enqueue_shift), 
data_race(rtp->percpu_enqueue_lim),
-- 
2.48.1