dt_ecbdesc_release
dt_ecbdesc_release(dtp, edp);
dt_ecbdesc_release(dtp, pcb->pcb_ecbdesc);
dt_ecbdesc_release(dtp, sdp->dtsd_ecbdesc);
extern void dt_ecbdesc_release(dtrace_hdl_t *, dtrace_ecbdesc_t *);