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From: Cao jin <caoj.fnst@cn.fujitsu.com>
To: X86 ML <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>
Subject: Is this code chunk in init_apic_mappings() superfluous?
Date: Thu, 5 Mar 2020 20:44:24 +0800	[thread overview]
Message-ID: <978293b9-8e9f-55f6-6ec4-e2d66c4db0de@cn.fujitsu.com> (raw)

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



             reply	other threads:[~2020-03-05 12:41 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-05 12:44 Cao jin [this message]
2020-03-07 11:27 ` Thomas Gleixner
2020-03-11 12:39   ` Cao jin

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