linux-kernel - Re: [PATCH] Driver Core: Add platform device arch data V2

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Message-Id: <200906031101.56577.rjw@sisk.pl>
Date:	Wed, 3 Jun 2009 11:01:55 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Magnus Damm <magnus.damm@...il.com>
Cc:	linux-kernel@...r.kernel.org, paul@...an.com,
	khilman@...prootsystems.com, gregkh@...e.de,
	stern@...land.harvard.edu, linux-pm@...ts.linux-foundation.org
Subject: Re: [PATCH] Driver Core: Add platform device arch data V2

On Tuesday 02 June 2009, Magnus Damm wrote:
> 2009/6/2 Rafael J. Wysocki <rjw@...k.pl>:
> > On Monday 01 June 2009, Rafael J. Wysocki wrote:
> >> On Monday 01 June 2009, Magnus Damm wrote:
> >> > From: Magnus Damm <damm@...l.co.jp>
[--snip--]
> 
> If you guys dislike adding arch specific data to struct platform
> device then for SuperH we can just (mis)use the arch specific data in
> struct device instead. I'm afraid that solution wastes memory since
> the data will only be used for platform devices anyway. So I prefer
> adding arch specific data to struct platform_device instead of struct
> device if possible.

BTW, what is the difference really?  You can always put
dev.platform_data = NULL for devices that don't have any platform data,
can't you?

Rafael
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