ACPI_MADT_LOCAL_APIC_OVERRIDE
ACPI_MADT_LOCAL_APIC_OVERRIDE *mao;
mao = (ACPI_MADT_LOCAL_APIC_OVERRIDE *) ap;
#define ACPI_MADT5_OFFSET(f) (UINT16) ACPI_OFFSET (ACPI_MADT_LOCAL_APIC_OVERRIDE,f)