acpi_ut_generate_checksum
u8 acpi_ut_generate_checksum(void *table, u32 length, u8 original_checksum);
acpi_ut_generate_checksum(ACPI_CAST_PTR(u8, table), length,
checksum = acpi_ut_generate_checksum(ACPI_CAST_PTR(u8, cdat_table),