diff --git a/libc/kernel/common/linux/blkpg.h b/libc/kernel/common/linux/blkpg.h
index 45a4a47..21dcdb4 100644
--- a/libc/kernel/common/linux/blkpg.h
+++ b/libc/kernel/common/linux/blkpg.h
@@ -7,35 +7,40 @@
  ***   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_BLKPG_H
 #define _LINUX_BLKPG_H
-
 #include <linux/compiler.h>
 #include <linux/ioctl.h>
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BLKPG _IO(0x12,105)
-
 struct blkpg_ioctl_arg {
  int op;
  int flags;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  int datalen;
  void __user *data;
 };
-
 #define BLKPG_ADD_PARTITION 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BLKPG_DEL_PARTITION 2
-
 #define BLKPG_DEVNAMELTH 64
 #define BLKPG_VOLNAMELTH 64
-
 struct blkpg_partition {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  long long start;
  long long length;
  int pno;
  char devname[BLKPG_DEVNAMELTH];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  char volname[BLKPG_VOLNAMELTH];
 };
-
 #endif