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From: des@des.no (Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?=)
To: jkoshy@FreeBSD.ORG (Joseph Koshy)
References: <20060304154259.8A7BE16A422@hub.freebsd.org>
Date: Sun, 05 Mar 2006 09:43:28 +0100
In-Reply-To: <20060304154259.8A7BE16A422@hub.freebsd.org> (Joseph Koshy's
	message of "Sat, 4 Mar 2006 15:42:59 +0000 (GMT)")
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Cc: Maxime Henrion <mux@FreeBSD.org>, cvs-src@FreeBSD.org,
	src-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/sys queue.h
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Joseph Koshy <jkoshy@FreeBSD.org> writes:
> Maxime Henrion <mux@FreeBSD.org> writes:
> >   Log:
> >   Cast the pointer to void * before casting it back to struct type * in
> >   STAILQ_LAST.  This quiets a warning from GCC about increased required
> >   alignment for the cast.
> Doesn't this trade a compile time warning for a runtime fault on those
> architectures where alignment matters?

Unless the stailq head has been corrupted, we know that the result of
the expression is correctly aligned for a pointer to struct type.

DES
--=20
Dag-Erling Sm=F8rgrav - des@des.no