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Date:	Wed, 28 Jul 2010 00:57:16 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	Greg KH <greg@...ah.com>, Greg KH <gregkh@...e.de>,
	Johannes Berg <johannes@...solutions.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] Driver-core: Fix bluetooth network device rename  regression

Kay Sievers <kay.sievers@...y.org> writes:

> Yeah, but most of these things we should have fixed over the last
> years. There is no single WAIT_FOR instruction left in udev rules. :)

Last time I looked there were quite a few attributes that were still
getting created late.  I would not be surprised if the common case
works fine, but I know of a least one and I think a couple of weird
cases that still have to do unpleasant things.

Still that is a project for another time.


>> At the subsystem level bus devices look better.
>> At the individual device level bus devices stacked on bus devices
>> appear to be a namespace disaster.
>
> They are usually created by the same code, in many cases by the same
> drivers, and have not been a real problem so far. As you said, network
> devices are special here, because of the ability to rename them from
> userspace.
>
> At some time in the future, when buses and classes are merged, I
> expect stuff can just set a flag to have a 'glue dir' created or not.
>
> For now 'glue dirs' are limited to be created between a bus and a
> class device. It could possibly be extended to be created between
> classes of different types to handle issues like this.

Sounds like a plan.  And now I'm off on vacation.

Have a good one.

Eric
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