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SubjectRe: [PATCH] IRQ, cpu-hotplug: Fix a race between CPU hotplug and IRQ desc alloc/free
On Tue, 5 Sep 2017, Huang, Ying wrote:
> Thomas Gleixner <tglx@linutronix.de> writes:
> > + /* Interrupts are moved away from the dying cpu, reenable alloc/free */
> > + irq_unlock_sparse();
> > +
>
> I don't understand this. It appears that irq_migrate_all_off_this_cpu()
> is called in take_cpu_down() which has sparse_irq_lock held already.

You're right. I was looking at the wrong place.

Thanks,

tglx

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