Is this code chunk in init_apic_mappings() superfluous?

[Cao jin]

Hi,

I am trying to figure the following code chunk out:

	if (x2apic_mode) {
		boot_cpu_physical_apicid = read_apic_id();
		return;
	}

As my understanding, even in x2APIC mode, boot_cpu_physical_apicid is
also got via early_acpi_process_madt --> ... --> register_lapic_address,
so, is it for any corner case I am not aware?
-- 
Sincerely,
Cao jin