linux-kernel - Re: [patch 1/3] Add BSS to resource tree

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Message-ID: <20071018215827.GB23708@uranus.ravnborg.org>
Date:	Thu, 18 Oct 2007 23:58:27 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Andi Kleen <ak@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Bernhard Walle <bwalle@...e.de>, linux-kernel@...r.kernel.org,
	kexec@...ts.infradead.org, vgoyal@...ibm.com
Subject: Re: [patch 1/3] Add BSS to resource tree

On Thu, Oct 18, 2007 at 11:48:37PM +0200, Andi Kleen wrote:
> > > +extern char _text[], _end[], _etext[], _edata[], _bss[];
> > 
> > These should be in a header file.
> 
> Normally the "no externs in .c" rule doesn't apply to assembler or linker 
> script defined labels. That's because the point of the header file is to 
> type check them, but there is nothing to type check here.

For linker generated symbols we have sections.h for this purpose.
The above symbols are all available if we do an:
#include <asm/sections.h>

This is the right fix in this case.

	Sam
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