_ns_drec
LIST_ENTRY(_ns_drec) list;
static LIST_HEAD(, _ns_drec) _ns_drec = LIST_HEAD_INITIALIZER(&_ns_drec);
struct _ns_drec drec, *ldrec;
LIST_FOREACH(ldrec, &_ns_drec, list) {
LIST_INSERT_HEAD(&_ns_drec, &drec, list);