netdev - Re: [Patch net-next] ipv6: separate out procfs code from mcast.c

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Date:	Wed, 24 Apr 2013 11:33:39 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	Bjørn Mork <bjorn@...k.no>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	yoshfuji@...ux-ipv6.org
Subject: Re: [Patch net-next] ipv6: separate out procfs code from mcast.c

On Tue, 2013-04-23 at 17:13 +0100, Ben Hutchings wrote:
> 
> A more type-safe approach would be to define something like:
> 
> /* net/ipv6.h */
> struct ipv6_mcast_ops {
> 	...
> };
> extern const struct ipv6_mcast_ops *ipv6_mcast_ops;
> 
> /* net/ipv6/addrconf_core.c */
> const struct ipv6_mcast_ops *ipv6_mcast_ops;
> EXPORT_SYMBOL_GPL(ipv6_mcast_ops);
> 
> /* net/ipv6/af_inet6.c */
> static const struct ipv6_mcast_ops ipv6_mcast_ops_impl = {
> 	...
> };
> static int __init inet6_init(void)
> {
> 	...
> 	ipv6_mcast_ops = &ipv6_mcast_ops_impl;
> 	return 0;
> 	...
> }
> static void __exit inet6_exit(void)
> {
> 	...
> 	ipv6_mcast_ops = NULL;
> 	...
> }

Yeah! That's a nice stub! I think this is the only doable and acceptable
solution so far.

Thanks a lot!

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