dasd_add_busid
prim_devmap = dasd_add_busid(prim_busid, DASD_FEATURE_DEFAULT);
sec_devmap = dasd_add_busid(sec_busid, DASD_FEATURE_DEFAULT);
devmap = dasd_add_busid(bus_id, features);
devmap = dasd_add_busid(dev_name(&cdev->dev),
static struct dasd_devmap *dasd_add_busid(const char *, int);