diff --git a/Documentation/core-api/kernel-api.rst b/Documentation/core-api/kernel-api.rst
index 25e94964065f14dca40e67b76149437ba118b3fe..39f1460d284256ab2be9a75230b18e1e483fa442 100644
--- a/Documentation/core-api/kernel-api.rst
+++ b/Documentation/core-api/kernel-api.rst
@@ -39,6 +39,10 @@ String Manipulation
 .. kernel-doc:: lib/string.c
    :export:
 
+.. kernel-doc:: mm/util.c
+   :functions: kstrdup kstrdup_const kstrndup kmemdup kmemdup_nul memdup_user
+               vmemdup_user strndup_user memdup_user_nul
+
 Basic Kernel Library Functions
 ==============================
 
@@ -168,7 +172,7 @@ The Slab Cache
    :export:
 
 .. kernel-doc:: mm/util.c
-   :export:
+   :functions: kfree_const kvmalloc_node kvfree get_user_pages_fast
 
 User Space Memory Access
 ------------------------