64 	u32 tail;  in ipath_ud_loopback()  local
124 	tail = wq->tail;  in ipath_ud_loopback()
126 	if (tail >= rq->size)  in ipath_ud_loopback()
127 		tail = 0;  in ipath_ud_loopback()
128 	if (unlikely(tail == wq->head)) {  in ipath_ud_loopback()
133 	wqe = get_rwqe_ptr(rq, tail);  in ipath_ud_loopback()
146 	if (++tail >= rq->size)  in ipath_ud_loopback()
147 		tail = 0;  in ipath_ud_loopback()
148 	wq->tail = tail;  in ipath_ud_loopback()
160 		if (n < tail)  in ipath_ud_loopback()
161 			n += rq->size - tail;  in ipath_ud_loopback()
163 			n -= tail;  in ipath_ud_loopback()