linux-kernel - Re: [RFC PATCH 1/3] Replace paravirt_probe with "platform type" boot header field

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Message-ID: <463B56F8.5070007@zytor.com>
Date:	Fri, 04 May 2007 08:53:28 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
CC:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andi Kleen <ak@...e.de>, Chris Wright <chrisw@...s-sol.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Zachary Amsden <zach@...are.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	lkml - Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 1/3] Replace paravirt_probe with "platform type"	boot
 header field

Rusty Russell wrote:
>>
>> ENTRY(startup_32)
>> #ifdef CONFIG_LGUEST_GUEST
>>         cmpl	$1, 0x23c(%esi)
>> 	je      lguest_init
>> #endif
> 
> Hi Eric!
> 
> 	Makes sense to me, but I wasn't sure... do we need to check for old
> bootloader versions and such?

So, in summary, yes, you have to check the version number before
assigning any meaning to this field.

	-hpa
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