On Thu, Nov 19, 2020 at 03:53:42PM +0000, David Howells wrote:
> timeo = wait_var_event_timeout(&cookie->stage, cookie_stage_changed(cookie, stage), 10*HZ);
> cookie->stage = stage;
> changed = true;
> break;
> }
> spin_unlock(&cookie->lock);
> if (changed) {
smp_mb(); // see comment on wake_up_bit() / wakequeue_active()
> wake_up_var(&cookie->stage);
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