if (ust_app_ht_by_notify_sock) {
cds_lfht_for_each_entry(ust_app_ht_by_notify_sock->ht, &iter.iter, app,
notify_sock_n.node) {
if (ust_app_ht_by_notify_sock) {
cds_lfht_for_each_entry(ust_app_ht_by_notify_sock->ht, &iter.iter, app,
notify_sock_n.node) {