diff --git a/libc/kernel/common/linux/vmalloc.h b/libc/kernel/common/linux/vmalloc.h
index c7fd103..7928ee3 100644
--- a/libc/kernel/common/linux/vmalloc.h
+++ b/libc/kernel/common/linux/vmalloc.h
@@ -7,34 +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_VMALLOC_H
 #define _LINUX_VMALLOC_H
-
 #include <linux/spinlock.h>
 #include <asm/page.h>  
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct vm_area_struct;
-
 #define VM_IOREMAP 0x00000001  
 #define VM_ALLOC 0x00000002  
 #define VM_MAP 0x00000004  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define VM_USERMAP 0x00000008  
 #define VM_VPAGES 0x00000010  
-
 #ifndef IOREMAP_MAX_ORDER
 #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT)  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-
 struct vm_struct {
  void *addr;
  unsigned long size;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long flags;
  struct page **pages;
  unsigned int nr_pages;
  unsigned long phys_addr;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct vm_struct *next;
 };
-
 #endif