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-rw-r--r--include/net/dst.h17
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();
}
}
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