netdev - Re: [net-next PATCH v5 01/16] net: qdisc: use rcu prefix and silence sparse warnings

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Message-ID: <1410539810.7106.96.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Fri, 12 Sep 2014 09:36:50 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	John Fastabend <john.fastabend@...il.com>
Cc:	xiyou.wangcong@...il.com, davem@...emloft.net, jhs@...atatu.com,
	netdev@...r.kernel.org, paulmck@...ux.vnet.ibm.com,
	brouer@...hat.com
Subject: Re: [net-next PATCH v5 01/16] net: qdisc: use rcu prefix and
 silence sparse warnings

On Fri, 2014-09-12 at 09:28 -0700, John Fastabend wrote:
> Add __rcu notation to qdisc handling by doing this we can make
> smatch output more legible. And anyways some of the cases should
> be using rcu_dereference() see qdisc_all_tx_empty(),
> qdisc_tx_chainging(), and so on.
> 
> Also *wake_queue() API is commonly called from driver timer routines
> without rcu lock or rtnl lock. So I added rcu_read_lock() blocks
> around netif_wake_subqueue and netif_tx_wake_queue.
> 
> Signed-off-by: John Fastabend <john.r.fastabend@...el.com>
> ---

Acked-by: Eric Dumazet <edumazet@...gle.com>


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