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

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Message-ID: <CAJFZqHwBwnNPBnPYqyUR8NU2LnagJtBEnvkzRL9TqrdQEqfhXA@mail.gmail.com>
Date:	Tue, 1 Nov 2011 17:05:19 +0800
From:	RongQing Li <roy.qing.li@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH next-net] ipv6: Use hlist_for_each_entry_rcu_bh() in ipv6_chk_same_addr()

2011/11/1 David Miller <davem@...emloft.net>:
> From: RongQing Li <roy.qing.li@...il.com>
> Date: Tue, 1 Nov 2011 16:33:49 +0800
>
>> Yes, But I think the code readable is not good,
>
> It is wasteful to add multiple BH disables and RCU memory
> barriers in code paths where it is not necessary.
>
> Your patch fixes no real bug, and adds a regression.
>

hlist_for_each_entry_rcu_bh() does not disable BH,
it only check If BH is disabled.

These codes is different from normal RCU convention.
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