Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: Is this code chunk in init_apic_mappings() superfluous? | Date | Sat, 07 Mar 2020 12:27:50 +0100 |
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Cao jin <caoj.fnst@cn.fujitsu.com> writes: > 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?
The case when there are neither ACPI nor valid mptables. Unlikely, but possible in theory.
Thanks,
tglx
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