ep_cur 2018 fs/eventpoll.c struct eventpoll *ep_cur, *ep_next; ep_cur 2023 fs/eventpoll.c list_for_each_entry_safe(ep_cur, ep_next, &visited_list, ep_cur 2025 fs/eventpoll.c ep_cur->visited = 0; ep_cur 2026 fs/eventpoll.c list_del(&ep_cur->visited_list_link);