linux-kernel - Re: [tip:x86/cpu] x86, msr: Add rd/wrmsr interfaces with preset registers

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Date:	Tue, 1 Sep 2009 15:06:28 +0200
From:	Borislav Petkov <borislav.petkov@....com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	petkovbb@...glemail.com, tglx@...utronix.de, petkovbb@...il.com,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/cpu] x86, msr: Add rd/wrmsr interfaces with preset
 registers

On Tue, Sep 01, 2009 at 01:05:13PM +0200, Ingo Molnar wrote:
> 
> * tip-bot for Borislav Petkov <petkovbb@...glemail.com> wrote:
> 
> > Commit-ID:  132ec92f3f70fe365c1f4b8d46e66cf8a2a16880
> > Gitweb:     http://git.kernel.org/tip/132ec92f3f70fe365c1f4b8d46e66cf8a2a16880
> > Author:     Borislav Petkov <petkovbb@...glemail.com>
> > AuthorDate: Mon, 31 Aug 2009 09:50:09 +0200
> > Committer:  H. Peter Anvin <hpa@...or.com>
> > CommitDate: Mon, 31 Aug 2009 15:14:26 -0700
> > 
> > x86, msr: Add rd/wrmsr interfaces with preset registers
> 
> FYI, -tip testing found a build failure on x86 with these patches:
> 
> arch/x86/lib/msr-reg.S:14: Error: Bad macro parameter list
> arch/x86/lib/msr-reg.S:100: Error: invalid character '_' in mnemonic
> arch/x86/lib/msr-reg.S:101: Error: invalid character '_' in mnemonic
> 
> config attached. I've excluded this topic branch from tip:master for 
> now.

I can't trigger it here.

Stab in the dark: It could be an old binutils issue since gas can't
swallow the macro definition. If you're building on a RHEL system,
it could be that the ":req" macro argument specification is not
supported by that particular version of the gnu assembler as
http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/gnu-assembler/macro.html
doesn't state anything on required macro arguments.

Try removing the ":req" part if the op macro argument to see whether it
builds. If so, ":req" is not absolutely necessary and we can do away
without it.

-- 
Regards/Gruss,
Boris.

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