atm_dev_lookup
if (itf != -1) dev = atm_dev_lookup(itf);
dev = atm_dev_lookup(itf);
struct atm_dev *atm_dev_lookup(int number);
dev = try_then_request_module(atm_dev_lookup(itf),
dev = try_then_request_module(atm_dev_lookup(number), "atm-device-%d",
EXPORT_SYMBOL(atm_dev_lookup);