diff --git a/libc/kernel/common/linux/kernel.h b/libc/kernel/common/linux/kernel.h
index 9682e47..608f31e 100644
--- a/libc/kernel/common/linux/kernel.h
+++ b/libc/kernel/common/linux/kernel.h
@@ -7,33 +7,40 @@
  ***   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_KERNEL_H
 #define _LINUX_KERNEL_H
-
 #define SI_LOAD_SHIFT 16
 struct sysinfo {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  long uptime;
  unsigned long loads[3];
  unsigned long totalram;
  unsigned long freeram;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long sharedram;
  unsigned long bufferram;
  unsigned long totalswap;
  unsigned long freeswap;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned short procs;
  unsigned short pad;
  unsigned long totalhigh;
  unsigned long freehigh;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int mem_unit;
  char _f[20-2*sizeof(long)-sizeof(int)];
 };
-
 #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1)
-
 #define __FUNCTION__ (__func__)
-
 #endif