diff --git a/libc/kernel/common/linux/file.h b/libc/kernel/common/linux/file.h
index 87e570b..552768e 100644
--- a/libc/kernel/common/linux/file.h
+++ b/libc/kernel/common/linux/file.h
@@ -7,58 +7,60 @@
  ***   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_FILE_H
 #define __LINUX_FILE_H
-
 #include <asm/atomic.h>
 #include <linux/posix_types.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/compiler.h>
 #include <linux/spinlock.h>
 #include <linux/rcupdate.h>
 #include <linux/types.h>
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NR_OPEN_DEFAULT BITS_PER_LONG
-
 struct embedded_fd_set {
  unsigned long fds_bits[1];
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define EMBEDDED_FD_SET_SIZE (BITS_PER_BYTE * sizeof(struct embedded_fd_set))
-
 struct fdtable {
  unsigned int max_fds;
  int max_fdset;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct file ** fd;
  fd_set *close_on_exec;
  fd_set *open_fds;
  struct rcu_head rcu;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct files_struct *free_files;
  struct fdtable *next;
 };
-
 struct files_struct {
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  atomic_t count;
  struct fdtable *fdt;
  struct fdtable fdtab;
-
  spinlock_t file_lock ____cacheline_aligned_in_smp;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  int next_fd;
  struct embedded_fd_set close_on_exec_init;
  struct embedded_fd_set open_fds_init;
  struct file * fd_array[NR_OPEN_DEFAULT];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-
 #define files_fdtable(files) (rcu_dereference((files)->fdt))
-
 struct kmem_cache;
-
 #define fcheck(fd) fcheck_files(current->files, fd)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct task_struct;
-
 struct files_struct *get_files_struct(struct task_struct *);
-
 #endif