struct acpi_ec *ec; 
union acpi_ec *ec; 
ec_write(u8 addr, u8 val){	struct acpi_ec *ec;	int err;	if (!first_ec)		return -ENODEV;	ec = acpi_driver_data(first_ec);	err = acpi_ec_write(ec, addr, val);	return err;}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/45bea1555f5bf0cd5871b208b4b02d188f106861/ec.c/buggy/drivers/acpi/ec.c