linux-kernel - Re: [PATCH 5/5] platform: Make platform

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Date:	Fri, 01 Aug 2014 18:21:09 +0100
From:	Pawel Moll <pawel.moll@....com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Olof Johansson <olof@...om.net>,
	Stephen Warren <swarren@...dotorg.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"paul@...an.com" <paul@...an.com>, Arnd Bergmann <arnd@...db.de>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	"arm@...nel.org" <arm@...nel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/5] platform: Make platform_bus device a platform device

On Sat, 2014-07-26 at 21:13 +0100, Greg Kroah-Hartman wrote:
> > @@ -946,12 +946,20 @@ int __init platform_bus_init(void)
> >  
> >  	early_platform_cleanup();
> >  
> > -	error = device_register(&platform_bus);
> > +	dev_set_name(&platform_bus.dev, "%s", platform_bus.name);
> > +	error = device_register(&platform_bus.dev);
> >  	if (error)
> >  		return error;
> >  	error =  bus_register(&platform_bus_type);
> > -	if (error)
> > -		device_unregister(&platform_bus);
> > +	if (!error) {
> > +#ifdef CONFIG_OF
> > +		platform_bus.dev.of_node = of_allnodes;
> > +#endif
> 
> Why are you doing this?  The original code didn't do it and all was
> fine, right?  What changes here?

You mean the #ifdef? It wasn't there, but Olof figured out that it
breaks !CONFIG_OF builds:

http://article.gmane.org/gmane.linux.ports.tegra/18473

as of_allnodes is only defined when CONFIG_OF. I had a choice of
#ifdefing the assignment above or providing a dummy symbol. The latter
doesn't seem sensibly, as there should be no other users for it (the
symbol).

Pawel

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