Re: [PATCH][net-next] ipv6: replace write lock with read lock in addrconf_permanent_addr

[David Miller]

From: roy.qing...@gmail.com
Date: Mon, 14 Mar 2016 17:35:08 +0800

> From: Li RongQing <roy.qing...@gmail.com>
> 
> nothing of idev is changed, so read lock is enough
> 
> Signed-off-by: Li RongQing <roy.qing...@gmail.com>

We need it for the modifications made by fixup_permanent_addr().