xpio_ctrl_init
if (!xpio_ctrl_init(xpio, disc->xcd_minor, &ctrl)) {
if (!xpio_ctrl_init(xpio, disc->xcd_minor, &ctrl)) {
(void) xpio_ctrl_init(xpio, disc->xcd_minor, &init->xcia_ctrl);
extern bool xpio_ctrl_init(xpio_t *, di_minor_t, xpio_ctrl_t **);