Re: [Devel] [PATCH 1/5] Cut off br_port fied from net_device

[Pavel Emelyanov <xemul@openvz.org>]

Alexey Dobriyan wrote:
> On Mon, Oct 22, 2007 at 04:33:33PM +0400, Pavel Emelyanov wrote:
>> And add the forward declaration for br_handle_frame_hook in
>> include/linux/if_bridge.h
> 
>> --- a/include/linux/netdevice.h
>> +++ b/include/linux/netdevice.h
>> @@ -699,8 +699,10 @@ struct net_device
>>  	/* Network namespace this network device is inside */
>>  	struct net		*nd_net;
>>  
>> +#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
>>  	/* bridge stuff */
>>  	struct net_bridge_port	*br_port;
>> +#endif
> 
> Such ifdefs are troublesome, because one can compile kernel with
> CONFIG_BRIDGE=n and later decide he needs BRIDGE=m and go boom.

You will have to recompile the whole kernel when this config
is on. Look at netif_receive_skb() ;)

> IPv6 -- the biggest violator of this rule should not be taken as
> example. :^)
> 
>