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

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Message-ID: <alpine.LFD.0.999.0707251018280.3607@woody.linux-foundation.org>
Date:	Wed, 25 Jul 2007 10:19:55 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
cc:	David Miller <davem@...emloft.net>, hpa@...or.com, kaos@....com.au,
	xyzzy@...akeasy.org, viro@....linux.org.uk,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH][RFC] getting rid of stupid loop in BUG()



On Wed, 25 Jul 2007, Jeremy Fitzhardinge wrote:
> 
> No, not any more.  The file and line info is out of line, in a separate
> section, indexed by the ud2a's eip.

That's irrelevant - the point is, we need to do the ud2 by hand, since we 
need to control the code generation in order to associate the ud2 with the 
proper file/linenr.

> The main problem with __builtin_trap is that there's no certain way to 
> get the actual ud2a eip (ie, paste an asm label onto it).

Right. Which is why we need to do it as an inline asm.

		Linus
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