netdev - [PATCH net-next] tipc: fix undefined __ipv6_sock_mc

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Message-ID: <1425953333-31403-1-git-send-email-ying.xue@windriver.com>
Date:	Tue, 10 Mar 2015 10:08:52 +0800
From:	Ying Xue <ying.xue@...driver.com>
To:	<davem@...emloft.net>
CC:	<jon.maloy@...csson.com>, <Paul.Gortmaker@...driver.com>,
	<erik.hugne@...csson.com>, <fengguang.wu@...el.com>,
	<netdev@...r.kernel.org>, <tipc-discussion@...ts.sourceforge.net>,
	<kbuild-all@...org>
Subject: [PATCH net-next] tipc: fix undefined __ipv6_sock_mc_join compile error

When CONFIG_IPV6 option is disabled, below compile error appears while
building TIPC module:

ERROR: "__ipv6_sock_mc_join" [net/tipc/tipc.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [net/tipc/tipc.ko] Error 1

This is because we don't check whether or not the CONFIG_IPV6 is
enabled when calling __ipv6_sock_mc_join().

Fixes: d0f91938bede ("tipc: add ip/udp media type")
Reported-by: Wu Fengguang <fengguang.wu@...el.com>
Cc: Kbuild test robot <kbuild-all@...org>
Signed-off-by: Ying Xue <ying.xue@...driver.com>
---
 net/tipc/udp_media.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index fc2fb11..6763002 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -247,10 +247,12 @@ static int enable_mcast(struct udp_bearer *ub, struct udp_media_addr *remote)
 		mreqn.imr_multiaddr = remote->ipv4;
 		mreqn.imr_ifindex = ub->ifindex;
 		err = __ip_mc_join_group(sk, &mreqn);
+#if IS_ENABLED(CONFIG_IPV6)
 	} else {
 		if (!ipv6_addr_is_multicast(&remote->ipv6))
 			return 0;
 		err = __ipv6_sock_mc_join(sk, ub->ifindex, &remote->ipv6);
+#endif
 	}
 	return err;
 }
-- 
1.7.9.5

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