diff --git a/libc/kernel/common/linux/pagemap.h b/libc/kernel/common/linux/pagemap.h
index 8dd397d..2a5223a 100644
--- a/libc/kernel/common/linux/pagemap.h
+++ b/libc/kernel/common/linux/pagemap.h
@@ -7,27 +7,35 @@
  ***   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_PAGEMAP_H
 #define _LINUX_PAGEMAP_H
-
 #include <linux/mm.h>
 #include <linux/fs.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/list.h>
 #include <linux/highmem.h>
 #include <linux/compiler.h>
 #include <asm/uaccess.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/gfp.h>
-
 #define AS_EIO (__GFP_BITS_SHIFT + 0)  
 #define AS_ENOSPC (__GFP_BITS_SHIFT + 1)  
-
 #define PAGE_CACHE_SHIFT PAGE_SHIFT
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PAGE_CACHE_SIZE PAGE_SIZE
 #define PAGE_CACHE_MASK PAGE_MASK
 #define PAGE_CACHE_ALIGN(addr) (((addr)+PAGE_CACHE_SIZE-1)&PAGE_CACHE_MASK)
 #define page_cache_get(page) get_page(page)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define page_cache_release(page) put_page(page)
-
+typedef int filler_t(void *, struct page *);
 #endif