return i2c_add_driver(&lm78_driver);
int res;  res = i2c_add_driver(&lm78_driver); if (res) return res;  res = i2c_isa_add_driver(&lm78_isa_driver); if (res) { i2c_del_driver(&lm78_driver); return res; }  return 0;
static int __init sm_lm78_init(void){	return i2c_add_driver(&lm78_driver);}