linux-kernel - Re: [PATCH][RFC] getting rid of stupid loop in BUG()

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Message-ID: <20070725173646.GI27237@ftp.linux.org.uk>
Date:	Wed, 25 Jul 2007 18:36:46 +0100
From:	Al Viro <viro@....linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	David Miller <davem@...emloft.net>, jeremy@...p.org, hpa@...or.com,
	kaos@....com.au, xyzzy@...akeasy.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org
Subject: Re: [PATCH][RFC] getting rid of stupid loop in BUG()

On Wed, Jul 25, 2007 at 09:56:12AM -0700, Linus Torvalds wrote:
> We don't just do the "ud2" instruction - we also do the file and line 
> number information after it. Which means that __builtin_trap() is useless.
> 
> So we might as well keep the loop, since both are two-byte instructions 
> that tell gcc that it will never continue.

Actually, the worse problem is that gcc will happily merge these guys.
And that's a killer.
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