int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
	      u64 summary_indicator_addr, u64 subchannel_indicator_addr,
	      u8 isc)
int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
	      dma64_t summary_indicator_addr, dma64_t subchannel_indicator_addr,
	      u8 isc)