cam_extend_get
void *p = cam_extend_get(ea, index);
void *cam_extend_get(struct extend_array *ea, int index);
periph = cam_extend_get(cdperiphs, unit);
periph = cam_extend_get(cdperiphs, unit);
periph = cam_extend_get(cdperiphs, unit);
periph = cam_extend_get(cdperiphs, unit);
periph = cam_extend_get(chperiphs, unit);
periph = cam_extend_get(chperiphs, unit);
periph = cam_extend_get(chperiphs, unit);
periph = cam_extend_get(daperiphs, unit);
periph = cam_extend_get(daperiphs, unit);
periph = cam_extend_get(daperiphs, unit);
periph = cam_extend_get(daperiphs, unit);
periph = cam_extend_get(daperiphs, unit);
periph = cam_extend_get(passperiphs, unit);
periph = cam_extend_get(passperiphs, unit);
periph = cam_extend_get(passperiphs, unit);
periph = cam_extend_get(ptperiphs, unit);
periph = cam_extend_get(ptperiphs, unit);
periph = cam_extend_get(ptperiphs, unit);
periph = cam_extend_get(ptperiphs, unit);
periph = cam_extend_get(saperiphs, unit);
periph = cam_extend_get(saperiphs, unit);
periph = cam_extend_get(saperiphs, unit);
periph = cam_extend_get(saperiphs, unit);
periph = cam_extend_get(sesperiphs, SESUNIT(dev));
periph = cam_extend_get(sesperiphs, unit);
periph = cam_extend_get(sesperiphs, SESUNIT(dev));