diff --git a/libc/kernel/common/linux/mempool.h b/libc/kernel/common/linux/mempool.h
index fa2432b..50dbad2 100644
--- a/libc/kernel/common/linux/mempool.h
+++ b/libc/kernel/common/linux/mempool.h
@@ -7,28 +7,33 @@
  ***   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_MEMPOOL_H
 #define _LINUX_MEMPOOL_H
-
 #include <linux/wait.h>
-
 struct kmem_cache;
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 typedef void * (mempool_alloc_t)(gfp_t gfp_mask, void *pool_data);
 typedef void (mempool_free_t)(void *element, void *pool_data);
-
 typedef struct mempool_s {
  spinlock_t lock;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  int min_nr;
  int curr_nr;
  void **elements;
-
  void *pool_data;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  mempool_alloc_t *alloc;
  mempool_free_t *free;
  wait_queue_head_t wait;
 } mempool_t;
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif