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Message-ID: <20100531162938.GA6574@aftab>
Date:	Mon, 31 May 2010 18:29:38 +0200
From:	Borislav Petkov <borislav.petkov@....com>
To:	Jeff Dike <jdike@...toit.com>
CC:	Borislav Petkov <bp@...en8.de>, "H. Peter Anvin" <hpa@...or.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Toralf Förster <toralf.foerster@....de>,
	"user-mode-linux-devel@...ts.sourceforge.net" 
	<user-mode-linux-devel@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86, hweight: Fix UML boot crash

From: Jeff Dike <jdike@...toit.com>
Date: Mon, May 31, 2010 at 11:56:19AM -0400

> On Mon, May 31, 2010 at 03:51:32PM +0200, Borislav Petkov wrote:
> > <arch/x86/include/asm/bitops.h> includes <asm/arch_hweight.h> which are
> > the optimized variants.
> 
> But how does UML get to arch/x86/include/asm/bitops.h in the first place?
> 
> It must go through an arch/um/include/asm/something.h (where something
> might be bitops) first, right?

Right, look at one of those dependencies file (for example,
arch/um/kernel/.ptrace.o.cmd) for a _very_ long inclusion chain which
contains <arch/x86/include/asm/arch_hweight.h> at some point.

-- 
Regards/Gruss,
Boris.

Operating Systems Research Center
Advanced Micro Devices, Inc.

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