diff --git a/libc/kernel/common/linux/linkage.h b/libc/kernel/common/linux/linkage.h
index e0194bc..5f3a027 100644
--- a/libc/kernel/common/linux/linkage.h
+++ b/libc/kernel/common/linux/linkage.h
@@ -7,60 +7,62 @@
  ***   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 _LINUX_LINKAGE_H
 #define _LINUX_LINKAGE_H
-
 #include <asm/linkage.h>
-
 #ifdef __cplusplus
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define CPP_ASMLINKAGE extern "C"
 #else
 #define CPP_ASMLINKAGE
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifndef asmlinkage
 #define asmlinkage CPP_ASMLINKAGE
 #endif
-
 #ifndef prevent_tail_call
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define prevent_tail_call(ret) do { } while (0)
 #endif
-
 #ifndef __ALIGN
 #define __ALIGN .align 4,0x90
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __ALIGN_STR ".align 4,0x90"
 #endif
-
 #ifdef __ASSEMBLY__
-
 #define ALIGN __ALIGN
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ALIGN_STR __ALIGN_STR
-
 #ifndef ENTRY
 #define ENTRY(name)   .globl name;   ALIGN;   name:
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define KPROBE_ENTRY(name)   .section .kprobes.text, "ax";   ENTRY(name)
-
 #ifndef END
 #define END(name)   .size name, .-name
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifndef ENDPROC
 #define ENDPROC(name)   .type name, @function;   END(name)
 #endif
-
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NORET_TYPE  
 #define ATTRIB_NORET __attribute__((noreturn))
 #define NORET_AND noreturn,
-
 #ifndef FASTCALL
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define FASTCALL(x) x
 #define fastcall
 #endif
-
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */