> This is subjective, but how about
>
> static bool xxx(void)
> {
> mutex_lock(&cpu_hotplug.lock);
> if (atomic_read(&cpu_hotplug.refcount) == 0)
> return true;
> mutex_unlock(&cpu_hotplug.lock);
> return false;
> }
>
> void cpu_hotplug_begin(void)
> {
> cpu_hotplug.active_writer = current;
>
> cpuhp_lock_acquire();
> wait_event(&cpu_hotplug.wq, xxx());
> }
>
> instead?
>
> Oleg.
>
Just checked wait_event(). It is safe against such race conditions as the same
pattern is used is applied internally.
Thanks!
David
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