ipv6: Use universal hash for NDISC.

In order to perform a proper universal hash on a vector of integers,
we have to use different universal hashes on each vector element.

Which means we need 4 different hash randoms for ipv6.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 381a0876c363..59402be133f0 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -121,7 +121,7 @@
 /*
  *      Interface to generic neighbour cache.
  */
-static u32 arp_hash(const void *pkey, const struct net_device *dev, __u32 rnd);
+static u32 arp_hash(const void *pkey, const struct net_device *dev, __u32 *hash_rnd);
 static int arp_constructor(struct neighbour *neigh);
 static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb);
 static void arp_error_report(struct neighbour *neigh, struct sk_buff *skb);
@@ -215,9 +215,9 @@ int arp_mc_map(__be32 addr, u8 *haddr, struct net_device *dev, int dir)
 
 static u32 arp_hash(const void *pkey,
                     const struct net_device *dev,
-                    __u32 hash_rnd)
+                    __u32 *hash_rnd)
 {
-        return arp_hashfn(*(u32 *)pkey, dev, hash_rnd);
+        return arp_hashfn(*(u32 *)pkey, dev, *hash_rnd);
 }
 
 static int arp_constructor(struct neighbour *neigh)