Re: [PATCH next-net] ipv6: Use hlist_for_each_entry_rcu_bh() in ipv6_chk_same_addr()

From: roy.qing.li <at> gmail.com
Date: Tue,  1 Nov 2011 13:30:55 +0800

> From: RongQing.Li <roy.qing.li <at> gmail.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 <at> gmail.com>

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