diff --git a/libc/kernel/common/asm-generic/topology.h b/libc/kernel/common/asm-generic/topology.h
index 089b1f2..7833d7d 100644
--- a/libc/kernel/common/asm-generic/topology.h
+++ b/libc/kernel/common/asm-generic/topology.h
@@ -7,29 +7,38 @@
  ***   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_GENERIC_TOPOLOGY_H
 #define _ASM_GENERIC_TOPOLOGY_H
-
 #ifndef cpu_to_node
 #define cpu_to_node(cpu) (0)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
 #ifndef parent_node
 #define parent_node(node) (0)
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifndef node_to_cpumask
 #define node_to_cpumask(node) (cpu_online_map)
 #endif
 #ifndef node_to_first_cpu
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define node_to_first_cpu(node) (0)
 #endif
 #ifndef pcibus_to_node
 #define pcibus_to_node(node) (-1)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-
 #ifndef pcibus_to_cpumask
 #define pcibus_to_cpumask(bus) (pcibus_to_node(bus) == -1 ?   CPU_MASK_ALL :   node_to_cpumask(pcibus_to_node(bus))   )
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif