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

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Date:	Fri, 11 Sep 2009 08:58:28 -0700
From:	David Daney <ddaney@...iumnetworks.com>
To:	Michael Buesch <mb@...sch.de>
CC:	linuxppc-dev@...ts.ozlabs.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, linux-mips@...ux-mips.org,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linuxppc-dev@...abs.org, Paul Mackerras <paulus@...ba.org>,
	"H. Peter Anvin" <hpa@...or.com>, linux-s390@...r.kernel.org,
	linux-am33-list@...hat.com, Helge Deller <deller@....de>,
	x86@...nel.org, Ingo Molnar <mingo@...hat.com>,
	Mike Frysinger <vapier@...too.org>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	uclinux-dist-devel@...ckfin.uclinux.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Richard Henderson <rth@...ddle.net>,
	Haavard Skinnemoen <hskinnemoen@...el.com>,
	linux-parisc@...r.kernel.org, linux-kernel@...r.kernel.org,
	ralf@...ux-mips.org, Kyle McMartin <kyle@...artin.ca>,
	linux-alpha@...r.kernel.org,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux390@...ibm.com,
	Koichi Yasutake <yasutake.koichi@...panasonic.com>
Subject: Re: [PATCH 01/10] Add support for GCC-4.5's __builtin_unreachable()
 to compiler.h

Michael Buesch wrote:
> On Friday 11 September 2009 01:56:42 David Daney wrote:
>> +/* Unreachable code */
>> +#ifndef unreachable
>> +# define unreachable() do { for (;;) ; } while (0)
>> +#endif
> 
> # define unreachable() do { } while (1)
> 
> ? :)

Clearly I was not thinking clearly when I wrote that part.  RTH noted 
the same thing.  I will fix it.

Thanks,
David Daney
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