diff --git a/libc/kernel/arch-arm/asm/ptrace.h b/libc/kernel/arch-arm/asm/ptrace.h
index a04eec3..661ba97 100644
--- a/libc/kernel/arch-arm/asm/ptrace.h
+++ b/libc/kernel/arch-arm/asm/ptrace.h
@@ -7,92 +7,98 @@
  ***   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_ARM_PTRACE_H
 #define __ASM_ARM_PTRACE_H
-
 #define PTRACE_GETREGS 12
 #define PTRACE_SETREGS 13
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PTRACE_GETFPREGS 14
 #define PTRACE_SETFPREGS 15
-
 #define PTRACE_GETWMMXREGS 18
 #define PTRACE_SETWMMXREGS 19
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PTRACE_OLDSETOPTIONS 21
-
 #define PTRACE_GET_THREAD_AREA 22
-
 #define PTRACE_SET_SYSCALL 23
-
 #define PTRACE_GETCRUNCHREGS 25
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PTRACE_SETCRUNCHREGS 26
-
 #define PTRACE_GETVFPREGS 27
 #define PTRACE_SETVFPREGS 28
-
 #define USR26_MODE 0x00000000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define FIQ26_MODE 0x00000001
 #define IRQ26_MODE 0x00000002
 #define SVC26_MODE 0x00000003
 #define USR_MODE 0x00000010
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define FIQ_MODE 0x00000011
 #define IRQ_MODE 0x00000012
 #define SVC_MODE 0x00000013
 #define ABT_MODE 0x00000017
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define UND_MODE 0x0000001b
 #define SYSTEM_MODE 0x0000001f
 #define MODE32_BIT 0x00000010
 #define MODE_MASK 0x0000001f
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PSR_T_BIT 0x00000020
 #define PSR_F_BIT 0x00000040
 #define PSR_I_BIT 0x00000080
 #define PSR_J_BIT 0x01000000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PSR_Q_BIT 0x08000000
 #define PSR_V_BIT 0x10000000
 #define PSR_C_BIT 0x20000000
 #define PSR_Z_BIT 0x40000000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PSR_N_BIT 0x80000000
 #define PCMASK 0
-
 #define PSR_f 0xff000000  
 #define PSR_s 0x00ff0000  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PSR_x 0x0000ff00  
 #define PSR_c 0x000000ff  
-
 #ifndef __ASSEMBLY__
-
 struct pt_regs {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  long uregs[18];
 };
-
 #define ARM_cpsr uregs[16]
 #define ARM_pc uregs[15]
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ARM_lr uregs[14]
 #define ARM_sp uregs[13]
 #define ARM_ip uregs[12]
 #define ARM_fp uregs[11]
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ARM_r10 uregs[10]
 #define ARM_r9 uregs[9]
 #define ARM_r8 uregs[8]
 #define ARM_r7 uregs[7]
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ARM_r6 uregs[6]
 #define ARM_r5 uregs[5]
 #define ARM_r4 uregs[4]
 #define ARM_r3 uregs[3]
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ARM_r2 uregs[2]
 #define ARM_r1 uregs[1]
 #define ARM_r0 uregs[0]
 #define ARM_ORIG_r0 uregs[17]
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define pc_pointer(v)   ((v) & ~PCMASK)
-
 #define instruction_pointer(regs)   (pc_pointer((regs)->ARM_pc))
-
 #define profile_pc(regs) instruction_pointer(regs)
-
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-