linux-kernel - Re: [RFC] x86: merge nmi

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Date:	Mon, 19 May 2008 18:27:39 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Adrian Bunk <bunk@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	Tom Spink <tspink@...il.com>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jiri Slaby <jirislaby@...il.com>,
	Sam Ravnborg <sam@...nborg.org>
Subject: Re: [RFC] x86: merge nmi_32-64 to nmi.c

[Andi Kleen - Sun, May 18, 2008 at 09:13:04PM +0200]
| Jeremy Fitzhardinge wrote:
| > Andi Kleen wrote:
| >> The whole idea was pretty bad. Ifdefs are not ugly because the syntax
| >> looks ugly, but because it's a semantically ugly construct with bad
| >> maintainability impact.
| >>
| >> Trying to put syntactical sugar around that is a doomed exercise. It
| >> will be still ugly, no matter what you do.
| > 
| > Not true.  Using C rather than CPP to control the compilation of config
| > options has the big win that all code paths are still visible to the
| > compiler. 
| 
| A small win. Still lots of other problems, including testing.
| 
|  In some cases that's not what you want, but it often is, and
| > it would avoid some degree if inadvertent breakage of options.  It can
| > also be syntactically a lot more pleasant.
| 
| Well it's still an unnecessary different code path and making
| it look nicer is just an excuse from properly cleaning it up.
| 
| -Andi
| 

ok, thanks to all reviewers for the look being taken. I will try to
eliminate as much #ifdefs as possible, make them straight and understandable
and will send the next patch as only get it done. Thanks to all!

		- Cyrill -
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