From mboxrd@z Thu Jan  1 00:00:00 1970
From: Cong Wang <xiyou.wangcong@gmail.com>
Subject: Re: [PATCH v2 net-next 07/27] net: add for_each iterators through
 neighbour lower link's private
Date: Wed, 11 Sep 2013 01:46:24 +0000 (UTC)
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References: <1378846691-9717-1-git-send-email-vfalico@redhat.com>
 <1378846691-9717-8-git-send-email-vfalico@redhat.com>
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On Tue, 10 Sep 2013 at 20:57 GMT, Veaceslav Falico <vfalico@redhat.com> wrote:
> +void *netdev_lower_get_next_private_rcu(struct net_device *dev,
> +					struct list_head **iter)
> +{
> +	struct netdev_adjacent *lower;
> +
> +	WARN_ON_ONCE(!rcu_read_lock_held());
> +

Since this function has _rcu suffix, this warning is not useful at all.