ipv6 netns: Make several "global" sysctl variables namespace aware.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/ipv6_sockglue.c

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 8c6ea07..ea33b26 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -1038,7 +1038,7 @@
 			dst_release(dst);
 		}
 		if (val < 0)
-			val = ipv6_devconf.hop_limit;
+			val = sock_net(sk)->ipv6.devconf_all->hop_limit;
 		break;
 	}