extern void afb_xreq_addref(struct afb_xreq *xreq);
extern void afb_xreq_unref(struct afb_xreq *xreq);
extern void afb_xreq_unhooked_addref(struct afb_xreq *xreq);
extern void afb_xreq_addref(struct afb_xreq *xreq);
extern void afb_xreq_unref(struct afb_xreq *xreq);
extern void afb_xreq_unhooked_addref(struct afb_xreq *xreq);