diff --git a/libc/kernel/common/mtd/mtd-abi.h b/libc/kernel/common/mtd/mtd-abi.h
index 0ae2263..434e3cc 100644
--- a/libc/kernel/common/mtd/mtd-abi.h
+++ b/libc/kernel/common/mtd/mtd-abi.h
@@ -7,127 +7,140 @@
  ***   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 __MTD_ABI_H__
 #define __MTD_ABI_H__
-
 struct erase_info_user {
  uint32_t start;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  uint32_t length;
 };
-
 struct mtd_oob_buf {
  uint32_t start;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  uint32_t length;
  unsigned char __user *ptr;
 };
-
 #define MTD_ABSENT 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MTD_RAM 1
 #define MTD_ROM 2
 #define MTD_NORFLASH 3
 #define MTD_NANDFLASH 4
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MTD_DATAFLASH 6
-
 #define MTD_WRITEABLE 0x400  
 #define MTD_BIT_WRITEABLE 0x800  
 #define MTD_NO_ERASE 0x1000  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MTD_STUPID_LOCK 0x2000  
-
 #define MTD_CAP_ROM 0
 #define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
 #define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MTD_CAP_NANDFLASH (MTD_WRITEABLE)
-
 #define MTD_NANDECC_OFF 0 
 #define MTD_NANDECC_PLACE 1 
 #define MTD_NANDECC_AUTOPLACE 2 
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MTD_NANDECC_PLACEONLY 3 
 #define MTD_NANDECC_AUTOPL_USR 4 
-
 #define MTD_OTP_OFF 0
 #define MTD_OTP_FACTORY 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MTD_OTP_USER 2
-
 struct mtd_info_user {
  uint8_t type;
  uint32_t flags;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  uint32_t size;
  uint32_t erasesize;
  uint32_t writesize;
  uint32_t oobsize;
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  uint32_t ecctype;
  uint32_t eccsize;
 };
-
 struct region_info_user {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  uint32_t offset;
  uint32_t erasesize;
  uint32_t numblocks;
  uint32_t regionindex;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-
 struct otp_info {
  uint32_t start;
  uint32_t length;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  uint32_t locked;
 };
-
 #define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
 #define MEMERASE _IOW('M', 2, struct erase_info_user)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
 #define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
 #define MEMLOCK _IOW('M', 5, struct erase_info_user)
 #define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MEMGETREGIONCOUNT _IOR('M', 7, int)
 #define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
 #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
 #define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MEMGETBADBLOCK _IOW('M', 11, loff_t)
 #define MEMSETBADBLOCK _IOW('M', 12, loff_t)
 #define OTPSELECT _IOR('M', 13, int)
 #define OTPGETREGIONCOUNT _IOW('M', 14, int)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define OTPGETREGIONINFO _IOW('M', 15, struct otp_info)
 #define OTPLOCK _IOR('M', 16, struct otp_info)
 #define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout)
 #define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MTDFILEMODE _IO('M', 19)
-
 struct nand_oobinfo {
  uint32_t useecc;
  uint32_t eccbytes;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  uint32_t oobfree[8][2];
  uint32_t eccpos[32];
 };
-
 struct nand_oobfree {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  uint32_t offset;
  uint32_t length;
 };
-
 #define MTD_MAX_OOBFREE_ENTRIES 8
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct nand_ecclayout {
  uint32_t eccbytes;
  uint32_t eccpos[64];
  uint32_t oobavail;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES];
 };
-
 struct mtd_ecc_stats {
  uint32_t corrected;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  uint32_t failed;
  uint32_t badblocks;
  uint32_t bbtblocks;
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 enum mtd_file_modes {
  MTD_MODE_NORMAL = MTD_OTP_OFF,
  MTD_MODE_OTP_FACTORY = MTD_OTP_FACTORY,
  MTD_MODE_OTP_USER = MTD_OTP_USER,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  MTD_MODE_RAW,
 };
-
 #endif