dasd_set_feature
dasd_set_feature(cdev, DASD_FEATURE_INITIAL_ONLINE, 0);
rc = dasd_set_feature(cdev, DASD_FEATURE_READONLY, val);
rc = dasd_set_feature(to_ccwdev(dev), DASD_FEATURE_ERPLOG, val);
rc = dasd_set_feature(to_ccwdev(dev), DASD_FEATURE_REQUEUEQUIESCE, val);
rc = dasd_set_feature(cdev, DASD_FEATURE_FAILONSLCK, 0);
rc = dasd_set_feature(cdev, DASD_FEATURE_FAILONSLCK, 1);
rc = dasd_set_feature(to_ccwdev(dev),
EXPORT_SYMBOL(dasd_set_feature);
rc = dasd_set_feature(to_ccwdev(dev), DASD_FEATURE_FAILFAST, val);
dasd_set_feature(cdev, DASD_FEATURE_DISCARD, 1);
int dasd_set_feature(struct ccw_device *, int, int);
rc = dasd_set_feature(base->cdev, DASD_FEATURE_READONLY, ro);