static inline int ep_events_available(struct eventpoll *ep)
{
	return !list_empty_careful(&ep->rdllist) ||
		READ_ONCE(ep->ovflist) != EP_UNACTIVE_PTR;
}
static inline int ep_events_available(struct eventpoll *ep)
{
	return !list_empty_careful(&ep->rdllist) ||
		READ_ONCE(ep->ovflist) != EP_UNACTIVE_PTR;
}