ipv6 flowlabel: Convert hash list to RCU.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index dc30b60..1d45716 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -222,6 +222,7 @@
 	struct in6_addr		dst;
 	struct ipv6_txoptions	*opt;
 	unsigned long		linger;
+	struct rcu_head		rcu;
 	u8			share;
 	union {
 		struct pid *pid;