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Date:	Thu, 27 Nov 2008 00:07:50 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Inaky Perez-Gonzalez <inaky@...ux.intel.com>
Cc:	netdev@...r.kernel.org, wimax@...uxwimax.org,
	Thomas Graf <tgraf@...g.ch>
Subject: Re: [PATCH 06/39] genetlink: export genl_unregister_mc_group()

On Wed, 2008-11-26 at 14:40 -0800, Inaky Perez-Gonzalez wrote:
> Add an EXPORT_SYMBOL() to genl_unregister_mc_group(), to allow
> unregistering groups on the run. EXPORT_SYMBOL_GPL() is not used as
> the rest of the functions exported by this module (eg:
> genl_register_mc_group) are also not _GPL().
> 
> Cleanup is currently done when unregistering a family, but there is
> no way to unregister a single multicast group due to that function not
> being exported. Seems to be a mistake as it is documented as for
> external consumption.
> 
> This is needed by the WiMAX stack to be able to cleanup unused mc
> groups.

Haven't looked at the users, but you definitely need that as soon as you
need to unregister a group on the fly, so obviously

Acked-by: Johannes Berg <johannes@...solutions.net>

> Signed-off-by: Inaky Perez-Gonzalez <inaky@...ux.intel.com>
> Cc: Johannes Berg <johannes@...solutions.net>
> Cc: Thomas Graf <tgraf@...g.ch>
> ---
>  net/netlink/genetlink.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
> index 3e1191c..1d3dd30 100644
> --- a/net/netlink/genetlink.c
> +++ b/net/netlink/genetlink.c
> @@ -225,6 +225,7 @@ void genl_unregister_mc_group(struct genl_family *family,
>  	__genl_unregister_mc_group(family, grp);
>  	genl_unlock();
>  }
> +EXPORT_SYMBOL(genl_unregister_mc_group);
>  
>  static void genl_unregister_mc_groups(struct genl_family *family)
>  {

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