diff --git a/libc/kernel/common/linux/kxtf9.h b/libc/kernel/common/linux/kxtf9.h
index 9141364..eb17df0 100644
--- a/libc/kernel/common/linux/kxtf9.h
+++ b/libc/kernel/common/linux/kxtf9.h
@@ -7,64 +7,70 @@
  ***   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 __KXTF9_H__
 #define __KXTF9_H__
-
 #include <linux/ioctl.h>  
-
 #define KXTF9_IOCTL_BASE 77
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KXTF9_IOCTL_SET_DELAY _IOW(KXTF9_IOCTL_BASE, 0, int)
 #define KXTF9_IOCTL_GET_DELAY _IOR(KXTF9_IOCTL_BASE, 1, int)
 #define KXTF9_IOCTL_SET_ENABLE _IOW(KXTF9_IOCTL_BASE, 2, int)
 #define KXTF9_IOCTL_GET_ENABLE _IOR(KXTF9_IOCTL_BASE, 3, int)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KXTF9_IOCTL_SET_G_RANGE _IOW(KXTF9_IOCTL_BASE, 4, int)
-
 #define KXTF9_IOCTL_SET_TILT_ENABLE _IOW(KXTF9_IOCTL_BASE, 5, int)
 #define KXTF9_IOCTL_SET_TAP_ENABLE _IOW(KXTF9_IOCTL_BASE, 6, int)
 #define KXTF9_IOCTL_SET_WAKE_ENABLE _IOW(KXTF9_IOCTL_BASE, 7, int)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KXTF9_IOCTL_SET_PM_MODE _IOW(KXTF9_IOCTL_BASE, 8, int)
 #define KXTF9_IOCTL_SELF_TEST _IOW(KXTF9_IOCTL_BASE, 9, int)
 #define KXTF9_IOCTL_SET_SENSITIVITY _IOW(KXTF9_IOCTL_BASE, 10, int)
-
 #define RES_12BIT 0x40
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KXTF9_G_2G 0x00
 #define KXTF9_G_4G 0x08
 #define KXTF9_G_8G 0x10
 #define TPE 0x01  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define WUFE 0x02  
 #define TDTE 0x04  
-
 #define OTP1_6 0x00  
 #define OTP6_3 0x20
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define OTP12_5 0x40
 #define OTP50 0x60
 #define OWUF25 0x00  
 #define OWUF50 0x01
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define OWUF100 0x02
 #define OWUF200 0x03
 #define OTDT50 0x00  
 #define OTDT100 0x04
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define OTDT200 0x08
 #define OTDT400 0x0C
-
 #define IEN 0x20  
 #define IEA 0x10  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IEL 0x08  
 #define IEU 0x04  
-
 #define ODR800 0x06  
 #define ODR400 0x05
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ODR200 0x04
 #define ODR100 0x03
 #define ODR50 0x02
 #define ODR25 0x01
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ODR12_5 0x00
-
 #define SENSITIVITY_REGS 0x07
-
 #endif
-
-