diff --git a/libc/kernel/common/linux/serio.h b/libc/kernel/common/linux/serio.h
index 7f04987..5c7c3a8 100644
--- a/libc/kernel/common/linux/serio.h
+++ b/libc/kernel/common/linux/serio.h
@@ -7,54 +7,65 @@
  ***   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 _SERIO_H
 #define _SERIO_H
-
 #include <linux/ioctl.h>
-
 #define SPIOCSTYPE _IOW('q', 0x01, unsigned long)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SERIO_TIMEOUT 1
 #define SERIO_PARITY 2
 #define SERIO_FRAME 4
-
 #define SERIO_XT 0x00
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SERIO_8042 0x01
 #define SERIO_RS232 0x02
 #define SERIO_HIL_MLC 0x03
 #define SERIO_PS_PSTHRU 0x05
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SERIO_8042_XL 0x06
-
 #define SERIO_UNKNOWN 0x00
 #define SERIO_MSC 0x01
 #define SERIO_SUN 0x02
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SERIO_MS 0x03
 #define SERIO_MP 0x04
 #define SERIO_MZ 0x05
 #define SERIO_MZP 0x06
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SERIO_MZPP 0x07
 #define SERIO_VSXXXAA 0x08
 #define SERIO_SUNKBD 0x10
 #define SERIO_WARRIOR 0x18
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SERIO_SPACEORB 0x19
 #define SERIO_MAGELLAN 0x1a
 #define SERIO_SPACEBALL 0x1b
 #define SERIO_GUNZE 0x1c
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SERIO_IFORCE 0x1d
 #define SERIO_STINGER 0x1e
 #define SERIO_NEWTON 0x1f
 #define SERIO_STOWAWAY 0x20
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SERIO_H3600 0x21
 #define SERIO_PS2SER 0x22
 #define SERIO_TWIDKBD 0x23
 #define SERIO_TWIDJOY 0x24
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SERIO_HIL 0x25
 #define SERIO_SNES232 0x26
 #define SERIO_SEMTECH 0x27
 #define SERIO_LKKBD 0x28
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SERIO_ELO 0x29
 #define SERIO_MICROTOUCH 0x30
-
 #endif