diff --git a/libc/kernel/common/linux/mempolicy.h b/libc/kernel/common/linux/mempolicy.h
index 6b7b2d4..d2ff923 100644
--- a/libc/kernel/common/linux/mempolicy.h
+++ b/libc/kernel/common/linux/mempolicy.h
@@ -7,26 +7,30 @@
  ***   structures, and macros generated from the original header, and thus,
  ***   contains no copyrightable information.
  ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
  ****************************************************************************
  ****************************************************************************/
 #ifndef _LINUX_MEMPOLICY_H
 #define _LINUX_MEMPOLICY_H 1
-
 #include <linux/errno.h>
-
 #define MPOL_DEFAULT 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MPOL_PREFERRED 1
 #define MPOL_BIND 2
 #define MPOL_INTERLEAVE 3
-
 #define MPOL_MAX MPOL_INTERLEAVE
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MPOL_F_NODE (1<<0)  
 #define MPOL_F_ADDR (1<<1)  
-
 #define MPOL_MF_STRICT (1<<0)  
 #define MPOL_MF_MOVE (1<<1)  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MPOL_MF_MOVE_ALL (1<<2)  
 #define MPOL_MF_INTERNAL (1<<3)  
-
 #endif