diff --git a/net/dccp/ccid.c b/net/dccp/ccid.c
index ccbf72c793b6c61381b40d466073a89f2bfb4575..c45088b5e6fb68f5c8a453561453061dee512d54 100644
--- a/net/dccp/ccid.c
+++ b/net/dccp/ccid.c
@@ -40,6 +40,7 @@ static inline void ccids_write_unlock(void)
 static inline void ccids_read_lock(void)
 {
 	atomic_inc(&ccids_lockct);
+	smp_mb__after_atomic_inc();
 	spin_unlock_wait(&ccids_lock);
 }