ipv4: Make neigh lookups directly in output packet path.

[deliverable/linux.git] / net / core / neighbour.c

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index d81d026138f0810471ce4cf2540c0ec4229d853f..a793af9af1505c4a919d15b603c4f1936d2d9bd9 100644 (file)
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -474,8 +474,8 @@ struct neighbour *neigh_lookup_nodev(struct neigh_table *tbl, struct net *net,
 }
 EXPORT_SYMBOL(neigh_lookup_nodev);
 
-struct neighbour *neigh_create(struct neigh_table *tbl, const void *pkey,
-                              struct net_device *dev)
+struct neighbour *__neigh_create(struct neigh_table *tbl, const void *pkey,
+                                struct net_device *dev, bool want_ref)
 {
        u32 hash_val;
        int key_len = tbl->key_len;
@@ -535,14 +535,16 @@ struct neighbour *neigh_create(struct neigh_table *tbl, const void *pkey,
             n1 = rcu_dereference_protected(n1->next,
                        lockdep_is_held(&tbl->lock))) {
                if (dev == n1->dev && !memcmp(n1->primary_key, pkey, key_len)) {
-                       neigh_hold(n1);
+                       if (want_ref)
+                               neigh_hold(n1);
                        rc = n1;
                        goto out_tbl_unlock;
                }
        }
 
        n->dead = 0;
-       neigh_hold(n);
+       if (want_ref)
+               neigh_hold(n);
        rcu_assign_pointer(n->next,
                           rcu_dereference_protected(nht->hash_buckets[hash_val],
                                                     lockdep_is_held(&tbl->lock)));
@@ -558,7 +560,7 @@ out_neigh_release:
        neigh_release(n);
        goto out;
 }
-EXPORT_SYMBOL(neigh_create);
+EXPORT_SYMBOL(__neigh_create);
 
 static u32 pneigh_hash(const void *pkey, int key_len)
 {