458 urb_link *first_urb_link (urb_link * hd)  in first_urb_link()  argument
461 	if (NULL != hd && NULL != (nx = hd->next) && nx != hd) {  in first_urb_link()
474 struct urb *first_urb (urb_link * hd)  in first_urb()  argument
477 	if (NULL == (nx = first_urb_link (hd))) {  in first_urb()
489 struct urb *first_urb_detached (urb_link * hd)  in first_urb_detached()  argument
492 	if ((urb = first_urb (hd))) {  in first_urb_detached()
504 void urb_append (urb_link * hd, struct urb *urb)  in urb_append()  argument
506 	if (hd && urb) {  in urb_append()
513 		urb_link *pul = hd->prev;  in urb_append()
514 		new->prev->next = hd;  in urb_append()
515 		hd->prev = new->prev;  in urb_append()