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);