[NET]: Apply NEIGH_HASHMASK at tbl->hash() caller.

Now there is no reason for any neigh implementation
to know the value of {P,}NEIGH_HASHMASK
Signed-off-by: David S. Miller <davem@davemloft.net>

net/atm/clip.c

@@ -334,7 +334,7 @@ static u32 clip_hash(const void *pkey, const struct net_device *dev)
 	hash_val ^= (hash_val>>16);
 	hash_val ^= hash_val>>8;
 	hash_val ^= hash_val>>3;
-	hash_val = (hash_val^dev->ifindex)&NEIGH_HASHMASK;
+	hash_val = (hash_val^dev->ifindex);
 
 	return hash_val;
 }

net/core/neighbour.c

@@ -291,7 +291,7 @@ struct neighbour *neigh_lookup(struct neigh_table *tbl, const void *pkey,
 {
 	struct neighbour *n;
 	int key_len = tbl->key_len;
-	u32 hash_val = tbl->hash(pkey, dev);
+	u32 hash_val = tbl->hash(pkey, dev) & NEIGH_HASHMASK;
 
 	read_lock_bh(&tbl->lock);
 	for (n = tbl->hash_buckets[hash_val]; n; n = n->next) {
@@ -336,7 +336,7 @@ struct neighbour *neigh_create(struct neigh_table *tbl, const void *pkey,
 
 	n->confirmed = jiffies - (n->parms->base_reachable_time << 1);
 
-	hash_val = tbl->hash(pkey, dev);
+	hash_val = tbl->hash(pkey, dev) & NEIGH_HASHMASK;
 
 	write_lock_bh(&tbl->lock);
 	if (n->parms->dead) {

net/decnet/dn_neigh.c

@@ -128,7 +128,7 @@ static u32 dn_neigh_hash(const void *pkey, const struct net_device *dev)
 	hash_val ^= (hash_val >> 10);
 	hash_val ^= (hash_val >> 3);
 
-	return hash_val & NEIGH_HASHMASK;
+	return hash_val;
 }
 
 static int dn_neigh_construct(struct neighbour *neigh)

net/ipv4/arp.c

@@ -229,7 +229,7 @@ static u32 arp_hash(const void *pkey, const struct net_device *dev)
 	hash_val ^= (hash_val>>16);
 	hash_val ^= hash_val>>8;
 	hash_val ^= hash_val>>3;
-	hash_val = (hash_val^dev->ifindex)&NEIGH_HASHMASK;
+	hash_val = (hash_val^dev->ifindex);
 
 	return hash_val;
 }

net/ipv6/ndisc.c

@@ -276,7 +276,7 @@ static u32 ndisc_hash(const void *pkey, const struct net_device *dev)
 	hash_val ^= (hash_val>>16);
 	hash_val ^= hash_val>>8;
 	hash_val ^= hash_val>>3;
-	hash_val = (hash_val^dev->ifindex)&NEIGH_HASHMASK;
+	hash_val = (hash_val^dev->ifindex);
 
 	return hash_val;
 }