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

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Date:	Fri, 19 Oct 2007 00:45:51 +0200
From:	Andi Kleen <ak@...e.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Sam Ravnborg <sam@...nborg.org>, ak@...e.de, 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 03:37:51PM -0700, Andrew Morton wrote:
> On Fri, 19 Oct 2007 00:18:13 +0200
> Sam Ravnborg <sam@...nborg.org> wrote:
> 
> > And I recall that extern char sym[] is considered correct by binutils 
> > people - but I'm not 100% sure and google did not give me an appropriate hit.
> 
> An ancient memory tells me that these things are traditionally
> declared as plain old int:
> 
> extern int start;
> extern int edata;

int is probably one of the less useful types. Typical operation is computing
the difference between two symbols in bytes. &int without cast would give
you a useless scaled size.

-Andi

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