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Message-ID: <20130406175800.GA2033@kroah.com>
Date:	Sat, 6 Apr 2013 10:58:00 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, Kay Sievers <kay@...y.org>
Subject: Re: [PATCH] driver core: add uid and gid to devtmpfs

On Sat, Apr 06, 2013 at 06:45:12PM +0100, Al Viro wrote:
> On Sat, Apr 06, 2013 at 10:26:12AM -0700, Greg KH wrote:
> 
> > Why not?  "closed" systems, like Android and other embedded systems,
> > have "assigned" uid and gid values that never change.  Right now they
> > have to have a horrible shell-script to set these values in devtmpfs
> > when the device shows up to the needed numbers.  This tiny patch gets
> > rid of that shell script entirely, allowing them to specify it from the
> > kernel as needed.
> 
> What's to stop them from using static /dev?  Has an extra benefit of
> getting rid of devtmpfs shite completely...

True, it would, but they like using devtmpfs :)

This change also allows systems that have "control" devices to properly
be able to pass in the uid for the device they are creating, like rawctl
(which I know is "obsolete"), and probably dm and lvm.  I thought loop
devices might also want this, as they can now be created by normal
users, but I don't think that's needed for them.

thanks,

greg k-h
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