linux-kernel - Re: [PATCH v3] of: Create asm-generic/of.h and provide default of_node_to

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Date:	Mon, 26 Jul 2010 16:51:01 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	David Miller <davem@...emloft.net>
Cc:	sam@...nborg.org, sfr@...b.auug.org.au, monstr@...str.eu,
	microblaze-uclinux@...e.uq.edu.au,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, benh@...nel.crashing.org,
	sparclinux@...r.kernel.org
Subject: Re: [PATCH v3] of: Create asm-generic/of.h and provide default 
	of_node_to_nid()

On Mon, Jul 26, 2010 at 4:48 PM, David Miller <davem@...emloft.net> wrote:
> From: Grant Likely <grant.likely@...retlab.ca>
> Date: Mon, 26 Jul 2010 16:42:20 -0600
>
>> It protects against some later include file doing a #define
>> of_node_to_nid and thus resulting in an inconsistent definition.  If
>> some code tries to do this then the preprocessor will complain.  This
>> is the pattern that Stephen suggested.
>
> Also, it would be nice to unravel the "0" vs. "-1" default
> inconsistency.

Indeed.  I looked at it briefly, but it wasn't immediately clear what
the impact would be to switch powerpc over to -1, and it looked to me
like sparc depends on -1 to signify no node association.

g.
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