acpi_madt_local_x2apic
struct acpi_madt_local_x2apic *processor = NULL;
processor = (struct acpi_madt_local_x2apic *)header;
struct acpi_madt_local_x2apic *apic =
container_of(entry, struct acpi_madt_local_x2apic, header);
struct acpi_madt_local_x2apic *p =
(struct acpi_madt_local_x2apic *)header;