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sched_ext: Use IRQ_WORK_INIT_HARD() to initialize rq->scx.kick_cpus_irq_work

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For PREEMPT_RT kernels, the kick_cpus_irq_workfn() be invoked in
the per-cpu irq_work/* task context and there is no rcu-read critical
section to protect. this commit therefore use IRQ_WORK_INIT_HARD() to
initialize the per-cpu rq->scx.kick_cpus_irq_work in the
init_sched_ext_class().

Signed-off-by: Zqiang <qiang.zhang@linux.dev>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Zqiang
2025-11-17 20:53:10 +08:00
committed by Tejun Heo
parent a257e97421
commit 36c6f3c03d
1 changed files with 1 additions and 1 deletions
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kernel/sched/ext.c
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@@ -5322,7 +5322,7 @@ void __init init_sched_ext_class(void)
BUG_ON(!zalloc_cpumask_var_node(&rq->scx.cpus_to_preempt, GFP_KERNEL, n));
BUG_ON(!zalloc_cpumask_var_node(&rq->scx.cpus_to_wait, GFP_KERNEL, n));
rq->scx.deferred_irq_work = IRQ_WORK_INIT_HARD(deferred_irq_workfn);
init_irq_work(&rq->scx.kick_cpus_irq_work, kick_cpus_irq_workfn);
rq->scx.kick_cpus_irq_work = IRQ_WORK_INIT_HARD(kick_cpus_irq_workfn);
if (cpu_online(cpu))
cpu_rq(cpu)->scx.flags |= SCX_RQ_ONLINE;