linux-kernel - Re: [PATCH 2/2] of: remove /proc/device-tree

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Date:	Wed, 20 Mar 2013 23:03:39 -0500
From:	Rob Landley <rob@...dley.net>
To:	Daniel Mack <daniel@...que.org>
Cc:	Rob Herring <robherring2@...il.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	Rob Herring <rob.herring@...xeda.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 2/2] of: remove /proc/device-tree

On 03/20/2013 11:24:54 AM, Daniel Mack wrote:
> On Wed, Mar 20, 2013 at 4:19 PM, Rob Herring <robherring2@...il.com>  
> wrote:
> > On 03/20/2013 09:51 AM, Grant Likely wrote:
> >> The same data is now available in sysfs, so we can remove the code
> >> that exports it in /proc and replace it with a symlink to the sysfs
> >> version.
> >>
> >> Tested on versatile qemu model and mpc5200 eval board. More testing
> >> would be appreciated.
> >
> > I would suggest testing with lshw in particular. That's the only
> > /proc/device-tree user I've come across.
> 
> kexec is another one. Not to mention various vendor scripts that  
> aren't
> necessarily public.
> 
> Don't such things also fall under the "we do not break userspace
> compatibility - ever" rule?

We used to have feature-removal-schedule. Linus removed it. (He did not  
add it to feature-removal-schedule first.)

Rob--
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