linux-kernel - Re: [lguest build regression fix] Re: 2.6.24-rc8-git1: Reported regressions from 2.6.23

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Date:	Sun, 20 Jan 2008 10:24:47 +1100
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Adrian Bunk <bunk@...nel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [lguest build regression fix] Re: 2.6.24-rc8-git1: Reported regressions from 2.6.23

On Sunday 20 January 2008 05:06:04 Ingo Molnar wrote:
> x86 randconfig testing found the following build failure:
>
>  arch/x86/lguest/boot.c: In function 'lazy_hcall':
>  arch/x86/lguest/boot.c:151: error: implicit declaration of function
> 'paravirt_get_lazy_mode' arch/x86/lguest/boot.c:151: error:
> 'PARAVIRT_LAZY_NONE' undeclared (first use in this function)
>
> which i bisected down to this very fresh commit:
>
>  commit 84f7466ee20cc094aa38617abfa2f3834871f054
>  Author: Rusty Russell <rusty@...tcorp.com.au>
>  Date:   Sat Jan 19 07:02:29 2008 +1100
>
>      Selecting LGUEST should turn on Guest support, as in 2.6.23.
>
> which allows the following .config variation:
>
>  # CONFIG_PARAVIRT_GUEST is not set
>  CONFIG_LGUEST_GUEST=y

This looks like a "randconfig" bug, to be honest.

CONFIG_LGUEST_GUEST and CONFIG_LGUEST are within "if PARAVIRT_GUEST" (include 
is in arch/x86/Kconfig).

Rusty.
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