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rcu-tasks: Remove unnecessary smp_store_release() in cblist_init_generic()

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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 and the irq is disabled. this commit therefore use routine
assignment replace of smp_store_release() and WRITE_ONCE() in the
cblist_init_generic().

Signed-off-by: Zqiang <qiang.zhang@linux.dev>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
This commit is contained in:
Zqiang 2026-01-05 09:19:51 +08:00 • committed by Joel Fernandes
commit 3e3d7d8f3a
1 changed files with 3 additions and 3 deletions
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6
kernel/rcu/tasks.h
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@ -291,9 +291,9 @@ static void cblist_init_generic(struct rcu_tasks *rtp)
shift = ilog2(rcu_task_cpu_ids / lim);
if (((rcu_task_cpu_ids - 1) >> shift) >= lim)
shift++;
WRITE_ONCE(rtp->percpu_enqueue_shift, shift);
WRITE_ONCE(rtp->percpu_dequeue_lim, lim);
smp_store_release(&rtp->percpu_enqueue_lim, lim);
rtp->percpu_enqueue_shift = shift;
rtp->percpu_dequeue_lim = lim;
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),