diff --git a/libc/kernel/arch-arm/asm/user.h b/libc/kernel/arch-arm/asm/user.h
index d0baecd..76c4074 100644
--- a/libc/kernel/arch-arm/asm/user.h
+++ b/libc/kernel/arch-arm/asm/user.h
@@ -7,66 +7,74 @@
  ***   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 _ARM_USER_H
 #define _ARM_USER_H
-
 #include <asm/page.h>
 #include <asm/ptrace.h>
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct user_fp {
  struct fp_reg {
  unsigned int sign1:1;
  unsigned int unused:15;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int sign2:1;
  unsigned int exponent:14;
  unsigned int j:1;
  unsigned int mantissa1:31;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int mantissa0:32;
  } fpregs[8];
  unsigned int fpsr:32;
  unsigned int fpcr:32;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned char ftype[8];
  unsigned int init_flag;
 };
-
 struct user{
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct pt_regs regs;
-
  int u_fpvalid;
-
  unsigned long int u_tsize;
  unsigned long int u_dsize;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long int u_ssize;
  unsigned long start_code;
  unsigned long start_stack;
  long int signal;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  int reserved;
  struct pt_regs * u_ar0;
-
  unsigned long magic;
  char u_comm[32];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  int u_debugreg[8];
  struct user_fp u_fp;
  struct user_fp_struct * u_fp0;
-
 };
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NBPG PAGE_SIZE
 #define UPAGES 1
 #define HOST_TEXT_START_ADDR (u.start_code)
 #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct user_vfp {
  unsigned long long fpregs[32];
  unsigned long fpscr;
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct user_vfp_exc {
  unsigned long fpexc;
  unsigned long fpinst;
  unsigned long fpinst2;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-
 #endif