diff --git a/libc/kernel/common/linux/nfs4.h b/libc/kernel/common/linux/nfs4.h
index 2e95e45..f7404c0 100644
--- a/libc/kernel/common/linux/nfs4.h
+++ b/libc/kernel/common/linux/nfs4.h
@@ -7,93 +7,104 @@
  ***   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_NFS4_H
 #define _LINUX_NFS4_H
-
 #include <linux/types.h>
-
 #define NFS4_VERIFIER_SIZE 8
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_FHSIZE 128
 #define NFS4_MAXPATHLEN PATH_MAX
 #define NFS4_MAXNAMLEN NAME_MAX
-
 #define NFS4_ACCESS_READ 0x0001
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_ACCESS_LOOKUP 0x0002
 #define NFS4_ACCESS_MODIFY 0x0004
 #define NFS4_ACCESS_EXTEND 0x0008
 #define NFS4_ACCESS_DELETE 0x0010
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_ACCESS_EXECUTE 0x0020
-
 #define NFS4_FH_PERSISTENT 0x0000
 #define NFS4_FH_NOEXPIRE_WITH_OPEN 0x0001
 #define NFS4_FH_VOLATILE_ANY 0x0002
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_FH_VOL_MIGRATION 0x0004
 #define NFS4_FH_VOL_RENAME 0x0008
-
 #define NFS4_OPEN_RESULT_CONFIRM 0x0002
 #define NFS4_OPEN_RESULT_LOCKTYPE_POSIX 0x0004
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_SHARE_ACCESS_READ 0x0001
 #define NFS4_SHARE_ACCESS_WRITE 0x0002
 #define NFS4_SHARE_ACCESS_BOTH 0x0003
 #define NFS4_SHARE_DENY_READ 0x0001
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_SHARE_DENY_WRITE 0x0002
 #define NFS4_SHARE_DENY_BOTH 0x0003
-
 #define NFS4_SET_TO_SERVER_TIME 0
 #define NFS4_SET_TO_CLIENT_TIME 1
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE 0
 #define NFS4_ACE_ACCESS_DENIED_ACE_TYPE 1
 #define NFS4_ACE_SYSTEM_AUDIT_ACE_TYPE 2
 #define NFS4_ACE_SYSTEM_ALARM_ACE_TYPE 3
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ACL4_SUPPORT_ALLOW_ACL 0x01
 #define ACL4_SUPPORT_DENY_ACL 0x02
 #define ACL4_SUPPORT_AUDIT_ACL 0x04
 #define ACL4_SUPPORT_ALARM_ACL 0x08
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_ACE_FILE_INHERIT_ACE 0x00000001
 #define NFS4_ACE_DIRECTORY_INHERIT_ACE 0x00000002
 #define NFS4_ACE_NO_PROPAGATE_INHERIT_ACE 0x00000004
 #define NFS4_ACE_INHERIT_ONLY_ACE 0x00000008
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_ACE_SUCCESSFUL_ACCESS_ACE_FLAG 0x00000010
 #define NFS4_ACE_FAILED_ACCESS_ACE_FLAG 0x00000020
 #define NFS4_ACE_IDENTIFIER_GROUP 0x00000040
 #define NFS4_ACE_OWNER 0x00000080
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_ACE_GROUP 0x00000100
 #define NFS4_ACE_EVERYONE 0x00000200
-
 #define NFS4_ACE_READ_DATA 0x00000001
 #define NFS4_ACE_LIST_DIRECTORY 0x00000001
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_ACE_WRITE_DATA 0x00000002
 #define NFS4_ACE_ADD_FILE 0x00000002
 #define NFS4_ACE_APPEND_DATA 0x00000004
 #define NFS4_ACE_ADD_SUBDIRECTORY 0x00000004
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_ACE_READ_NAMED_ATTRS 0x00000008
 #define NFS4_ACE_WRITE_NAMED_ATTRS 0x00000010
 #define NFS4_ACE_EXECUTE 0x00000020
 #define NFS4_ACE_DELETE_CHILD 0x00000040
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_ACE_READ_ATTRIBUTES 0x00000080
 #define NFS4_ACE_WRITE_ATTRIBUTES 0x00000100
 #define NFS4_ACE_DELETE 0x00010000
 #define NFS4_ACE_READ_ACL 0x00020000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_ACE_WRITE_ACL 0x00040000
 #define NFS4_ACE_WRITE_OWNER 0x00080000
 #define NFS4_ACE_SYNCHRONIZE 0x00100000
 #define NFS4_ACE_GENERIC_READ 0x00120081
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_ACE_GENERIC_WRITE 0x00160106
 #define NFS4_ACE_GENERIC_EXECUTE 0x001200A0
 #define NFS4_ACE_MASK_ALL 0x001F01FF
-
 enum nfs4_acl_whotype {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  NFS4_ACL_WHO_NAMED = 0,
  NFS4_ACL_WHO_OWNER,
  NFS4_ACL_WHO_GROUP,
  NFS4_ACL_WHO_EVERYONE,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-
 #endif
-