netdev - Re: [PATCH next-net] ipv6: Use hlist_for_each_entry_rcu_bh() in ipv6_chk_same

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Message-Id: <20111101.035323.458528114788135444.davem@davemloft.net>
Date:	Tue, 01 Nov 2011 03:53:23 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	roy.qing.li@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH next-net] ipv6: Use hlist_for_each_entry_rcu_bh() in
 ipv6_chk_same_addr()

From: roy.qing.li@...il.com
Date: Tue,  1 Nov 2011 13:30:55 +0800

> From: RongQing.Li <roy.qing.li@...il.com>
> 
> Replace hlist_for_each_entry and hlist_for_each_entry_rcu with
> hlist_for_each_entry_rcu_bh() in ipv6_chk_same_addr and
> ipv6_chk_addr to keep that all dereference methods for addr_list
> are same, and take advantage of _rcu_bh() critical section
> checking and prevention from compiler merging or refetching.
> 
> Signed-off-by: RongQing.Li <roy.qing.li@...il.com>

Callers are already in an RCU section with BH disabled when these
functions are invoked.
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