78 	struct rr_queue *head, *tail;	/* Pointer to current queue */  member
88 	/* append to the tail */  in rr_append()
92 		si->tail->qnext = q;  in rr_append()
93 	si->tail = q;		/* advance the tail pointer */  in rr_append()
105 	if (si->head == si->tail) {  in rr_remove_head()
106 		si->head = si->tail = NULL;  in rr_remove_head()
111 	si->tail->qnext = si->head;  in rr_remove_head()
133 		if (q == si->tail)  in remove_queue_q()
134 			si->tail = prev;  in remove_queue_q()
147 	si->tail = si->tail->qnext;  in next_pointer()
228 	si->head = si->tail = NULL;  in rr_new_sched()