diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 08605ce..65178c4 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -340,6 +340,11 @@
 	return !preemptible();
 }
 
+static inline int debug_lockdep_rcu_enabled(void)
+{
+	return 0;
+}
+
 #endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */
 
 #ifdef CONFIG_PROVE_RCU