_Q_INVALID
((TAILQ_NEXT(st, sync_list) == _Q_INVALID) &&
(TAILQ_NEXT(st, entry_list) == _Q_INVALID));
(LIST_NEXT(inp, inp_hash) == _Q_INVALID));
(LIST_NEXT(inp, inp_lhash) == _Q_INVALID));
(TAILQ_NEXT(inp, inp_queue) == _Q_INVALID));
#define _Q_INVALIDATE(a) (a) = _Q_INVALID