extern void wfq_node_init(struct wfq_node *node);
extern void wfq_init(struct wfq_queue *q);
extern void wfq_enqueue(struct wfq_queue *q, struct wfq_node *node);
extern void wfq_node_init(struct wfq_node *node);
extern void wfq_init(struct wfq_queue *q);
extern void wfq_enqueue(struct wfq_queue *q, struct wfq_node *node);