[BRIDGE]: Use RCU for port table.

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/list.h b/include/linux/list.h
index 4178fd498c89..9b8485930659 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -320,6 +320,21 @@ static inline void list_splice_init(struct list_head *list,
 	for (pos = (head)->next, n = pos->next; pos != (head); \
 		pos = n, ({ smp_read_barrier_depends(); 0;}), n = pos->next)
 
+/**
+ * list_for_each_entry_rcu	-	iterate over rcu list of given type
+ * @pos:	the type * to use as a loop counter.
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_for_each_entry_rcu(pos, head, member)			\
+	for (pos = list_entry((head)->next, typeof(*pos), member),	\
+		     prefetch(pos->member.next);			\
+	     &pos->member != (head); 					\
+	     pos = list_entry(pos->member.next, typeof(*pos), member),	\
+		     ({ smp_read_barrier_depends(); 0;}),		\
+		     prefetch(pos->member.next))
+
+
 /* 
  * Double linked lists with a single pointer list head. 
  * Mostly useful for hash tables where the two pointer list head is