Commit 36c6f3c0 authored by Zqiang's avatar Zqiang Committed by Tejun Heo
Browse files

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



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: default avatarZqiang <qiang.zhang@linux.dev>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent a257e974

kernel/sched/ext.c

+1 −1
Original line number Diff line number Diff line
@@ -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;