1 files changed, 13 insertions, 4 deletions

diff --git a/include/net/dst.h b/include/net/dst.h
index 29e255796ce1..13d507d69ddb 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -37,7 +37,7 @@ struct dst_entry {
         unsigned long           _metrics;
         unsigned long           expires;
         struct dst_entry        *path;
-        struct neighbour        *_neighbour;
+        struct neighbour __rcu  *_neighbour;
 #ifdef CONFIG_XFRM
         struct xfrm_state       *xfrm;
 #else
@@ -88,12 +88,17 @@ struct dst_entry {
 
 static inline struct neighbour *dst_get_neighbour(struct dst_entry *dst)
 {
-        return dst->_neighbour;
+        return rcu_dereference(dst->_neighbour);
+}
+
+static inline struct neighbour *dst_get_neighbour_raw(struct dst_entry *dst)
+{
+        return rcu_dereference_raw(dst->_neighbour);
 }
 
 static inline void dst_set_neighbour(struct dst_entry *dst, struct neighbour *neigh)
 {
-        dst->_neighbour = neigh;
+        rcu_assign_pointer(dst->_neighbour, neigh);
 }
 
 extern u32 *dst_cow_metrics_generic(struct dst_entry *dst, unsigned long old);
@@ -382,8 +387,12 @@ static inline void dst_rcu_free(struct rcu_head *head)
 static inline void dst_confirm(struct dst_entry *dst)
 {
         if (dst) {
-                struct neighbour *n = dst_get_neighbour(dst);
+                struct neighbour *n;
+
+                rcu_read_lock();
+                n = dst_get_neighbour(dst);
                 neigh_confirm(n);
+                rcu_read_unlock();
         }
 }