linux-kernel - Re: [ 12/53] net: In unregister_netdevice

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Date:	Fri, 18 May 2012 23:43:25 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	ben@...adent.org.uk
Cc:	herton.krzesinski@...onical.com, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	ebiederm@...ssion.com, eric.dumazet@...il.com
Subject: Re: [ 12/53] net: In unregister_netdevice_notifier unregister the
 netdevices.

From: Ben Hutchings <ben@...adent.org.uk>
Date: Sat, 19 May 2012 01:31:36 +0100

> On Fri, 2012-05-18 at 01:41 -0400, David Miller wrote:
>> From: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
>> Date: Fri, 18 May 2012 02:09:05 -0300
>> 
>> > On Fri, May 18, 2012 at 03:33:06AM +0100, Ben Hutchings wrote:
>> >> 3.2.18-stable review patch.  If anyone has any objections, please let me know.
>> >> 
>> >> ------------------
>> >> 
>> >> From: "Eric W. Biederman" <ebiederm@...ssion.com>
>> >> 
>> >> [ Upstream commit 7d3d43dab4e978d8d9ad1acf8af15c9b1c4b0f0f ]
>> >> 
>> >> We already synthesize events in register_netdevice_notifier and synthesizing
>> >> events in unregister_netdevice_notifier allows to us remove the need for
>> >> special case cleanup code.
>> >> 
>> >> This change should be safe as it adds no new cases for existing callers
>> >> of unregiser_netdevice_notifier to handle.
>> > 
>> > It seems this introduces a regression later fixed by commit
>> > c57b54684060c8aced64a5b78ff69ff289af97b9
>> 
>> Indeed, but thankfully that only hits people who try to unload the
>> pktgen module which is a pretty small group of people :)
> 
> Surely we ought to avoid introducing a known regression.  Though I also
> see that that the above fix for pktgen was incorrect and the
> fix-of-the-fix (d4b1133558e0d417342d5d2c49e4c35b428ff20d) is not in
> mainline yet.  But if the latter reaches mainline by Sunday, perhaps I
> could add them both?

I just asked Linus to pull it in.
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