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Date:	Tue, 14 Aug 2012 17:02:57 -0700 (PDT)
From:	David Miller <>
Subject: Re: [PATCH net] ipv6: addrconf: Avoid calling netdevice notifiers
 with RCU read-side lock

From: Ben Hutchings <>
Date: Tue, 14 Aug 2012 19:54:51 +0100

> Cong Wang reports that lockdep detected suspicious RCU usage while
> enabling IPV6 forwarding:
> addrconf_forward_change() uses RCU iteration over the netdev list,
> which is unnecessary since it already holds the RTNL lock.  We also
> cannot reasonably require netdevice notifier functions not to sleep.
> Reported-by: Cong Wang <>
> Signed-off-by: Ben Hutchings <>

Applied and queued up for -stable, thanks Ben.
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