netdev - Re: [PATCH net-next-2.6] net: replace hooks in __netif_receive

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Message-ID: <20100602080730.53abea6d@nehalam>
Date:	Wed, 2 Jun 2010 08:07:30 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Jiri Pirko <jpirko@...hat.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net, kaber@...sh.net,
	eric.dumazet@...il.com
Subject: Re: [PATCH net-next-2.6] net: replace hooks in __netif_receive_skb
 V5

On Wed, 2 Jun 2010 09:52:08 +0200
Jiri Pirko <jpirko@...hat.com> wrote:

> +
> +	err = netdev_rx_handler_register(dev, macvlan_handle_frame);
> +	if (err) {
> +		rcu_assign_pointer(dev->macvlan_port, NULL);
> +		kfree(port);
> +	}
> +
> +	return err;
>  }

Rcu assign is not necessary here for because the hook didn't
get registered so there is no way for other CPU to see it.

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