ipv6: Call skb_get_hash_flowi6 to get skb->hash in ip6_make_flowlabel

We can't call skb_get_hash here since the packet is not complete to do
flow_dissector. Create hash based on flowi6 instead.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index eecdfc9..3e334b3 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -708,12 +708,13 @@
 
 #if IS_ENABLED(CONFIG_IPV6)
 static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb,
-					__be32 flowlabel, bool autolabel)
+					__be32 flowlabel, bool autolabel,
+					struct flowi6 *fl6)
 {
 	if (!flowlabel && (autolabel || net->ipv6.sysctl.auto_flowlabels)) {
 		u32 hash;
 
-		hash = skb_get_hash(skb);
+		hash = skb_get_hash_flowi6(skb, fl6);
 
 		/* Since this is being sent on the wire obfuscate hash a bit
 		 * to minimize possbility that any useful information to an