sip_control_data
sizeof(struct sip_control_data));
sizeof(struct sip_control_data), PAGE_SIZE, 0, &sc->sc_seg, 1,
sizeof(struct sip_control_data), (void **)&sc->sc_control_data,
sizeof(struct sip_control_data), 1,
sizeof(struct sip_control_data), 0, 0, &sc->sc_cddmamap)) != 0) {
sc->sc_control_data, sizeof(struct sip_control_data), NULL,
#define SIP_CDOFF(x) offsetof(struct sip_control_data, x)
struct sip_control_data *sc_control_data;