linux-kernel - Re: [PATCH 16/16] fix handling of integer constant expressions

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Message-ID: <20070627172903.GB21478@ftp.linux.org.uk>
Date:	Wed, 27 Jun 2007 18:29:03 +0100
From:	Al Viro <viro@....linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Neil Booth <neil@...kokuya.co.uk>,
	Josh Triplett <josh@...edesktop.org>,
	Segher Boessenkool <segher@...nel.crashing.org>,
	linux-kernel@...r.kernel.org, linux-sparse@...r.kernel.org
Subject: Re: [PATCH 16/16] fix handling of integer constant expressions

On Wed, Jun 27, 2007 at 09:19:17AM -0700, Linus Torvalds wrote:
> In particular, "offsetof()" should be portably able to basically be the 
> standard #define, which involves an integer cast from a constant pointer. 
> That had *better* be a valid constant integer expression, because it's 
> very useful.

Eh...  I'd say that my variant for offsetof() is simply better - it usually
directly turns into EXPR_VALUE, right in place, without rather convoluted
work.  Aside of "should such cast be a constant integer expression"...
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