#define DCR_MAP_OK(host) ((host).token != NULL)
extern dcr_host_t dcr_map(struct device_node *dev, unsigned int dcr_n,
unsigned int dcr_c);
#define DCR_MAP_OK(host) ((host).token != NULL)
extern dcr_host_t dcr_map(struct device_node *dev, unsigned int dcr_n,
unsigned int dcr_c);