linux-kernel - Re: [RFC] driver-core: Add device node pointer to struct device

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Date:	Wed, 24 Feb 2010 14:36:45 -0800
From:	Greg KH <gregkh@...e.de>
To:	Grant Likely <grant.likely@...retlab.ca>
Cc:	linux-kernel@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	kay.sievers@...y.org, benh@...nel.crashing.org
Subject: Re: [RFC] driver-core: Add device node pointer to struct device

On Wed, Feb 24, 2010 at 03:09:24PM -0700, Grant Likely wrote:
> On Wed, Feb 24, 2010 at 2:44 PM, Greg KH <gregkh@...e.de> wrote:
> > On Wed, Feb 24, 2010 at 02:10:30PM -0700, Grant Likely wrote:
> >> Greg and Kay,
> >>
> >> This is a patch from a larger series of OF related cleanup patches.  This
> >> one adds a new 'of_node' member to struct device, conditional upon
> >> CONFIG_OF.  The goal is to move of_node out of archdata because all
> >> arches using CONFIG_OF need it.
> >>
> >> Before I commit too much effort down this path, I want to get your
> >> feedback.  Do you have any objections to this change to struct device?
> >>
> >> @@ -414,6 +415,9 @@ struct device {
> >>                                            override */
> >>       /* arch specific additions */
> >>       struct dev_archdata     archdata;
> >> +#ifdef CONFIG_OF
> >> +     struct device_node      *of_node;
> >> +#endif
> >
> > No objection from me, but do we really need the #ifdef here?
> 
> I added the #ifdef because it is complete dead weight when CONFIG_OF
> is not set.  However, I'll defer to your preference here on what looks
> cleaner w.r.t. maintenance.

Ok, you can leave it as-is, that's not a problem.  As long as we don't
have to #ifdef the core code, it should be fine.

thanks,

greg k-h
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