diff --git a/Documentation/RCU/rculist_nulls.rst b/Documentation/RCU/rculist_nulls.rst
index d40374221d69..a9fc774bc400 100644
--- a/Documentation/RCU/rculist_nulls.rst
+++ b/Documentation/RCU/rculist_nulls.rst
@@ -10,6 +10,9 @@ objects using SLAB_TYPESAFE_BY_RCU allocations.
 
 Please read the basics in Documentation/RCU/listRCU.rst
 
+Using 'nulls'
+=============
+
 Using special makers (called 'nulls') is a convenient way
 to solve following problem :
 
@@ -126,6 +129,9 @@ very very fast (before the end of RCU grace period)
 
 --------------------------------------------------------------------------
 
+Avoiding extra smp_rmb()
+========================
+
 With hlist_nulls we can avoid extra smp_rmb() in lockless_lookup()
 and extra smp_wmb() in insert function.