linux-kernel - Re: [tip:x86/urgent] x86, asm: Clean up desc.h a bit

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Date:	Fri, 27 May 2011 19:12:40 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	mingo@...hat.com, linux-kernel@...r.kernel.org, tglx@...utronix.de,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/urgent] x86, asm: Clean up desc.h a bit


* H. Peter Anvin <hpa@...or.com> wrote:

> On 05/27/2011 01:39 AM, tip-bot for Ingo Molnar wrote:
> > Commit-ID:  9a3865b185e77d1a4ca2d8356e37c19b78168961
> > Gitweb:     http://git.kernel.org/tip/9a3865b185e77d1a4ca2d8356e37c19b78168961
> > Author:     Ingo Molnar <mingo@...e.hu>
> > AuthorDate: Fri, 27 May 2011 09:29:32 +0200
> > Committer:  Ingo Molnar <mingo@...e.hu>
> > CommitDate: Fri, 27 May 2011 09:30:50 +0200
> > 
> > x86, asm: Clean up desc.h a bit
> > 
> > I have looked at this file and found it rather ugly - improve
> > readability a bit. No change in functionality.
> > 
> 
> It sure is, but let me also register for the record that I hate the
> bloody bitfield.  A lot of what the bitfield does is completely
> pointless (breaking down the type field, which really is nothing other
> than a magic constant as far as the kernel is anyway) and generates
> insanely bad code.
> 
> I honestly think if we used macros like GDT_ENTRY() and perhaps a few
> variants we would make the code simpler.

Yeah. I really didnt want to modify functionality in this patch, just 
wanted my eyes to not bleed. Using macros there would probably 
generate better code as well, right?

Thanks,

	Ingo
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