linux-kernel - Re: [PATCH] BUILD_BUG_ON_ZERO -> BUILD_BUG_OR

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Message-ID: <Pine.LNX.4.64.0703120748310.6942@CPE00045a9c397f-CM001225dbafb6>
Date:	Mon, 12 Mar 2007 07:49:16 -0400 (EDT)
From:	"Robert P. J. Day" <rpjday@...dspring.com>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
cc:	Rusty Russell <rusty@...tcorp.com.au>,
	Jan Beulich <jbeulich@...ell.com>, Andi Kleen <ak@....de>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] BUILD_BUG_ON_ZERO -> BUILD_BUG_OR_ZERO

On Mon, 12 Mar 2007, Stefan Richter wrote:

> Rusty Russell wrote:
> > On Mon, 2007-03-12 at 08:23 +0000, Jan Beulich wrote:
> >> I have to admit that I don't see the point here - I can't seem to make
> >> any sense of the OR... Jan
> >
> > At least one other person thought that:
> >
> > 	#define BUILD_BUG_ON_ZERO(e) BUILD_BUG_ON((e) == 0)
> >
> > OTOH, BUILD_BUG_OR_ZERO says what happens: either it's a build bug, or
> > it's zero.
>
> What about ZERO_UNLESS_BUILD_BUG_ON(e)? It's long though...

how often is this going to be used?  it's not like the tree is
currently awash in calls to BUILD_BUG_ON_ZERO as it is.

rday

-- 
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

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