134 	struct sfq_slot *tail;		/* current slot in round */  member
341 		x = q->tail->next;  in sfq_drop()
343 		q->tail->next = slot->next;  in sfq_drop()
469 		if (q->tail == NULL) {	/* It is the first flow */  in sfq_enqueue()
472 			slot->next = q->tail->next;  in sfq_enqueue()
473 			q->tail->next = x;  in sfq_enqueue()
479 		q->tail = slot;  in sfq_enqueue()
508 	if (q->tail == NULL)  in sfq_dequeue()
512 	a = q->tail->next;  in sfq_dequeue()
515 		q->tail = slot;  in sfq_dequeue()
530 			q->tail = NULL; /* no more active slots */  in sfq_dequeue()
533 		q->tail->next = next_a;  in sfq_dequeue()
579 	q->tail = NULL;  in sfq_rehash()
609 			if (q->tail == NULL) {	/* It is the first flow */  in sfq_rehash()
612 				slot->next = q->tail->next;  in sfq_rehash()
613 				q->tail->next = x;  in sfq_rehash()
615 			q->tail = slot;  in sfq_rehash()
631 	if (!q->filter_list && q->tail)  in sfq_perturbation()
749 	q->tail = NULL;  in sfq_init()