[PATCH 3.16.y-ckt 223/254] ipv6: fix IPV6_PKTINFO with v4 mapped

[Luis Henriques]

3.16.7-ckt2 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Dumazet <edumazet@xxxxxxxxxx>

commit 5337b5b75cd9bd3624a6820e3c2a084d2480061c upstream.

Use IS_ENABLED(CONFIG_IPV6), to enable this code if IPv6 is
a module.

Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Fixes: c8e6ad0829a7 ("ipv6: honor IPV6_PKTINFO with v4 mapped addresses on sendmsg")
Acked-by: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
 net/ipv4/ip_sockglue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 64741b938632..94f1f15cf834 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -195,7 +195,7 @@ int ip_cmsg_send(struct net *net, struct msghdr *msg, struct ipcm_cookie *ipc,
 	for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
 		if (!CMSG_OK(msg, cmsg))
 			return -EINVAL;
-#if defined(CONFIG_IPV6)
+#if IS_ENABLED(CONFIG_IPV6)
 		if (allow_ipv6 &&
 		    cmsg->cmsg_level == SOL_IPV6 &&
 		    cmsg->cmsg_type == IPV6_PKTINFO) {
-- 
2.1.0

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