net: Kill dst->_neighbour, accessors, and final uses.

No longer used.

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

diff --git a/include/net/dst.h b/include/net/dst.h
index 295a705..b2634e4 100644 (file)
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -42,7 +42,7 @@ struct dst_entry {
                struct dst_entry        *from;
        };
        struct dst_entry        *path;
-       struct neighbour __rcu  *_neighbour;
+       void                    *__pad0;
 #ifdef CONFIG_XFRM
        struct xfrm_state       *xfrm;
 #else
@@ -96,21 +96,6 @@ struct dst_entry {
        };
 };
 
-static inline struct neighbour *dst_get_neighbour_noref(struct dst_entry *dst)
-{
-       return rcu_dereference(dst->_neighbour);
-}
-
-static inline struct neighbour *dst_get_neighbour_noref_raw(struct dst_entry *dst)
-{
-       return rcu_dereference_raw(dst->_neighbour);
-}
-
-static inline void dst_set_neighbour(struct dst_entry *dst, struct neighbour *neigh)
-{
-       rcu_assign_pointer(dst->_neighbour, neigh);
-}
-
 extern u32 *dst_cow_metrics_generic(struct dst_entry *dst, unsigned long old);
 extern const u32 dst_default_metrics[RTAX_MAX];
 

diff --git a/net/core/dst.c b/net/core/dst.c
index a6e19a2..07bacff 100644 (file)
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -171,7 +171,6 @@ void *dst_alloc(struct dst_ops *ops, struct net_device *dev,
        dst_init_metrics(dst, dst_default_metrics, true);
        dst->expires = 0UL;
        dst->path = dst;
-       RCU_INIT_POINTER(dst->_neighbour, NULL);
 #ifdef CONFIG_XFRM
        dst->xfrm = NULL;
 #endif
@@ -225,19 +224,12 @@ EXPORT_SYMBOL(__dst_free);
 struct dst_entry *dst_destroy(struct dst_entry * dst)
 {
        struct dst_entry *child;
-       struct neighbour *neigh;
 
        smp_rmb();
 
 again:
-       neigh = rcu_dereference_protected(dst->_neighbour, 1);
        child = dst->child;
 
-       if (neigh) {
-               RCU_INIT_POINTER(dst->_neighbour, NULL);
-               neigh_release(neigh);
-       }
-
        if (!(dst->flags & DST_NOCOUNT))
                dst_entries_add(dst->ops, -1);
 
@@ -361,19 +353,9 @@ static void dst_ifdown(struct dst_entry *dst, struct net_device *dev,
        if (!unregister) {
                dst->input = dst->output = dst_discard;
        } else {
-               struct neighbour *neigh;
-
                dst->dev = dev_net(dst->dev)->loopback_dev;
                dev_hold(dst->dev);
                dev_put(dev);
-               rcu_read_lock();
-               neigh = dst_get_neighbour_noref(dst);
-               if (neigh && neigh->dev == dev) {
-                       neigh->dev = dst->dev;
-                       dev_hold(dst->dev);
-                       dev_put(dev);
-               }
-               rcu_read_unlock();
        }
 }