linux-kernel - Re: [PATCH net-next-2.6] : __in_dev_get_rtnl() can use rtnl

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Message-Id: <20101206.130015.246519364.davem@davemloft.net>
Date:	Mon, 06 Dec 2010 13:00:15 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	amwang@...hat.com, linux-kernel@...r.kernel.org,
	kuznet@....inr.ac.ru, pekkas@...core.fi, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net, netdev@...r.kernel.org
Subject: Re: [PATCH net-next-2.6] : __in_dev_get_rtnl() can use
 rtnl_dereference()

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 01 Dec 2010 12:37:42 +0100

> Le mercredi 01 décembre 2010 à 12:21 +0100, Eric Dumazet a écrit :
> 
>> Same here. RTNL is held. Please use __in_dev_get_rtnl()
> 
> By the way we can use rtnl_dereference() in __in_dev_get_rtnl()
> 
> [PATCH net-next-2.6] : __in_dev_get_rtnl() can use rtnl_dereference()
> 
> If caller holds RTNL, we dont need a memory barrier
> (smp_read_barrier_depends) included in rcu_dereference().
> 
> Just use rtnl_dereference() to properly document the assertions.
> 
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied.
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