> > > +
> > > + /* Pairs with acquire in last_report_show(). */
> > > + atomic_inc_return_release(&num_reports);
> > > + schedule_delayed_work(&reporting_done, 0);
> >
> > Why delayed work when it gets queued immediately?
>
> Because error reports may be sent from a place where waiting is
> forbidden (in the case of KFENCE that is the page fault handler).
> A delayed work ensures the notification occurs in a wait-safe context.
>
Agreed, there's actually no point in calling schedule_delayed_work()
instead of schedule_work() here.
