diff --git a/libc/kernel/arch-x86/asm/elf.h b/libc/kernel/arch-x86/asm/elf.h
index 6c6fbbf..ac01942 100644
--- a/libc/kernel/arch-x86/asm/elf.h
+++ b/libc/kernel/arch-x86/asm/elf.h
@@ -7,68 +7,73 @@
  ***   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 _ASM_X86_ELF_H
 #define _ASM_X86_ELF_H
-
 #include <asm/ptrace.h>
 #include <asm/user.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <asm/auxvec.h>
-
 typedef unsigned long elf_greg_t;
-
 #define ELF_NGREG (sizeof (struct user_regs_struct) / 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_i387_struct elf_fpregset_t;
-
 #ifdef __i386__
-
 typedef struct user_fxsr_struct elf_fpxregset_t;
-
 #define R_386_NONE 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define R_386_32 1
 #define R_386_PC32 2
 #define R_386_GOT32 3
 #define R_386_PLT32 4
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define R_386_COPY 5
 #define R_386_GLOB_DAT 6
 #define R_386_JMP_SLOT 7
 #define R_386_RELATIVE 8
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define R_386_GOTOFF 9
 #define R_386_GOTPC 10
 #define R_386_NUM 11
-
 #define ELF_CLASS ELFCLASS32
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ELF_DATA ELFDATA2LSB
 #define ELF_ARCH EM_386
-
 #else
-
 #define R_X86_64_NONE 0  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define R_X86_64_64 1  
 #define R_X86_64_PC32 2  
 #define R_X86_64_GOT32 3  
 #define R_X86_64_PLT32 4  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define R_X86_64_COPY 5  
 #define R_X86_64_GLOB_DAT 6  
 #define R_X86_64_JUMP_SLOT 7  
 #define R_X86_64_RELATIVE 8  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define R_X86_64_GOTPCREL 9  
 #define R_X86_64_32 10  
 #define R_X86_64_32S 11  
 #define R_X86_64_16 12  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define R_X86_64_PC16 13  
 #define R_X86_64_8 14  
 #define R_X86_64_PC8 15  
-
 #define R_X86_64_NUM 16
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ELF_CLASS ELFCLASS64
 #define ELF_DATA ELFDATA2LSB
 #define ELF_ARCH EM_X86_64
-
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif