diff --git a/Documentation/trace/kprobetrace.rst b/Documentation/trace/kprobetrace.rst
index a49662ccd53c..195c942d9bec 100644
--- a/Documentation/trace/kprobetrace.rst
+++ b/Documentation/trace/kprobetrace.rst
@@ -58,8 +58,9 @@ Synopsis of kprobe_events
   NAME=FETCHARG : Set NAME as the argument name of FETCHARG.
   FETCHARG:TYPE : Set TYPE as the type of FETCHARG. Currently, basic types
 		  (u8/u16/u32/u64/s8/s16/s32/s64), hexadecimal types
-		  (x8/x16/x32/x64), "char", "string", "ustring", "symbol", "symstr"
-                  and bitfield are supported.
+		  (x8/x16/x32/x64), VFS layer common type(%pd/%pD), "char",
+                  "string", "ustring", "symbol", "symstr" and bitfield are
+                  supported.
 
   (\*1) only for the probe on function entry (offs == 0). Note, this argument access
         is best effort, because depending on the argument type, it may be passed on
@@ -122,6 +123,9 @@ With 'symstr' type, you can filter the event with wildcard pattern of the
 symbols, and you don't need to solve symbol name by yourself.
 For $comm, the default type is "string"; any other type is invalid.
 
+VFS layer common type(%pd/%pD) is a special type, which fetches dentry's or
+file's name from struct dentry's address or struct file's address.
+
 .. _user_mem_access:
 
 User Memory Access