linux-kernel - Re: [PATCH 01/10] Add support for GCC-4.5's __builtin

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Message-ID: <4AA99666.4090207@twiddle.net>
Date:	Thu, 10 Sep 2009 17:14:30 -0700
From:	Richard Henderson <rth@...ddle.net>
To:	David Daney <ddaney@...iumnetworks.com>
CC:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	ralf@...ux-mips.org, linux-mips@...ux-mips.org,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux390@...ibm.com, linux-s390@...r.kernel.org,
	David Howells <dhowells@...hat.com>,
	Koichi Yasutake <yasutake.koichi@...panasonic.com>,
	linux-am33-list@...hat.com, Kyle McMartin <kyle@...artin.ca>,
	Helge Deller <deller@....de>, linux-parisc@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>, linuxppc-dev@...abs.org,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	linux-alpha@...r.kernel.org,
	Haavard Skinnemoen <hskinnemoen@...el.com>,
	Mike Frysinger <vapier@...too.org>,
	uclinux-dist-devel@...ckfin.uclinux.org
Subject: Re: [PATCH 01/10] Add support for GCC-4.5's __builtin_unreachable()
 to compiler.h

On 09/10/2009 04:56 PM, David Daney wrote:
> +#ifndef unreachable
> +# define unreachable() do { for (;;) ; } while (0)
> +#endif

#define unreachable() do { } while (1)


r~
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