linux-kernel - Re: [RFC] [PATCH 10/16] x86

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Message-ID: <m14pt3qhjy.fsf@ebiederm.dsl.xmission.com>
Date:	Mon, 13 Nov 2006 12:21:05 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Andi Kleen <ak@...e.de>
Cc:	vgoyal@...ibm.com,
	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Reloc Kernel List <fastboot@...ts.osdl.org>, akpm@...l.org,
	hpa@...or.com, magnus.damm@...il.com, lwang@...hat.com,
	dzickus@...hat.com, pavel@...e.cz,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [RFC] [PATCH 10/16] x86_64: 64bit PIC ACPI wakeup

Andi Kleen <ak@...e.de> writes:

>> This code (verify_cpu) is called while we are still in real mode. So it has
>> to be present in low 1MB. Now in trampoline has been designed to switch to
>> 64bit mode and then jump to the kernel hence kernel can be loaded anywhere
>> even beyond (4G). So if we move this code into say arch/x86_64/kernel/head.S
>> then we can't even call it.
>
> I didn't mean to call it. Just #include it from a common file

I believe the duplication winds up happening in setup.S

Eric
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