[patch] net: ipv6 build fix

[Ingo Molnar <mingo@elte.hu>]

hi David,

* David Miller <davem@davemloft.net> wrote:

>       net: Several cleanups for the setsockopt compat support.
>       net: Add compat support for getsockopt (MCAST_MSFILTER)

this broke !COMPAT builds in current -git. Fix below. NOTE: fix is just 
a quick guess.

	Ingo

----------------------->
Subject: net: ipv6 build fix
From: Ingo Molnar <mingo@elte.hu>
Date: Wed Apr 30 22:32:09 CEST 2008

x86.git testing found the following build error on -git:

  ERROR: "compat_mc_getsockopt" [net/ipv6/ipv6.ko] undefined!

with this config:

  http://redhat.com/~mingo/misc/config-Wed_Apr_30_22_23_37_CEST_2008.bad

this hits on !COMPAT + IPV6 modular builds. It is caused by commit
42908c69f6 ("net: Add compat support for getsockopt (MCAST_MSFILTER)").

this fix here is just a quick guess - i _suspect_ that
do_ipv6_getsockopt() will just DTRT and return -EINVAL but i
havent checked. It obviously solves the build issue.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 net/ipv6/ipv6_sockglue.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux/net/ipv6/ipv6_sockglue.c
===================================================================
--- linux.orig/net/ipv6/ipv6_sockglue.c
+++ linux/net/ipv6/ipv6_sockglue.c
@@ -1089,9 +1089,11 @@ int ipv6_getsockopt(struct sock *sk, int
 	if(level != SOL_IPV6)
 		return -ENOPROTOOPT;
 
+#ifdef CONFIG_COMPAT
 	if (optname == MCAST_MSFILTER)
 		return compat_mc_getsockopt(sk, level, optname, optval, optlen,
 			ipv6_getsockopt);
+#endif
 
 	err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
 #ifdef CONFIG_NETFILTER