diff --git a/libc/kernel/arch-arm/asm/elf.h b/libc/kernel/arch-arm/asm/elf.h
index e9d095e..d23a01a 100644
--- a/libc/kernel/arch-arm/asm/elf.h
+++ b/libc/kernel/arch-arm/asm/elf.h
@@ -7,57 +7,58 @@
  ***   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 __ASMARM_ELF_H
 #define __ASMARM_ELF_H
-
 #include <asm/ptrace.h>
 #include <asm/user.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifdef __KERNEL
 #include <asm/procinfo.h>
 #endif
-
 typedef unsigned long elf_greg_t;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 typedef unsigned long elf_freg_t[3];
-
 #define EM_ARM 40
 #define EF_ARM_APCS26 0x08
 #define EF_ARM_SOFT_FLOAT 0x200
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define EF_ARM_EABI_MASK 0xFF000000
-
 #define R_ARM_NONE 0
 #define R_ARM_PC24 1
 #define R_ARM_ABS32 2
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define R_ARM_CALL 28
 #define R_ARM_JUMP24 29
-
 #define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 typedef struct user_fp elf_fpregset_t;
-
 #define elf_check_arch(x) ( ((x)->e_machine == EM_ARM) && (ELF_PROC_OK((x))) )
-
 #define ELF_CLASS ELFCLASS32
 #ifdef __ARMEB__
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ELF_DATA ELFDATA2MSB
 #else
 #define ELF_DATA ELFDATA2LSB
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ELF_ARCH EM_ARM
-
 #define USE_ELF_CORE_DUMP
 #define ELF_EXEC_PAGESIZE 4096
-
 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ELF_PLAT_INIT(_r, load_addr) (_r)->ARM_r0 = 0
-
 #define ELF_HWCAP (elf_hwcap)
-
 #define ELF_PLATFORM_SIZE 8
-
 #define ELF_PLATFORM (elf_platform)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif