diff --git a/libc/kernel/common/linux/magic.h b/libc/kernel/common/linux/magic.h
index c94f9ce..76f334c 100644
--- a/libc/kernel/common/linux/magic.h
+++ b/libc/kernel/common/linux/magic.h
@@ -7,49 +7,57 @@
  ***   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_MAGIC_H__
 #define __LINUX_MAGIC_H__
-
 #define ADFS_SUPER_MAGIC 0xadf5
 #define AFFS_SUPER_MAGIC 0xadff
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define AFS_SUPER_MAGIC 0x5346414F
 #define AUTOFS_SUPER_MAGIC 0x0187
 #define CODA_SUPER_MAGIC 0x73757245
 #define EFS_SUPER_MAGIC 0x414A53
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define EXT2_SUPER_MAGIC 0xEF53
 #define EXT3_SUPER_MAGIC 0xEF53
 #define EXT4_SUPER_MAGIC 0xEF53
 #define HPFS_SUPER_MAGIC 0xf995e849
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ISOFS_SUPER_MAGIC 0x9660
 #define JFFS2_SUPER_MAGIC 0x72b6
 #define ANON_INODE_FS_MAGIC 0x09041934
-
 #define MINIX_SUPER_MAGIC 0x137F  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MINIX_SUPER_MAGIC2 0x138F  
 #define MINIX2_SUPER_MAGIC 0x2468  
 #define MINIX2_SUPER_MAGIC2 0x2478  
 #define MINIX3_SUPER_MAGIC 0x4d5a  
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MSDOS_SUPER_MAGIC 0x4d44  
 #define NCP_SUPER_MAGIC 0x564c  
 #define NFS_SUPER_MAGIC 0x6969
 #define OPENPROM_SUPER_MAGIC 0x9fa1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define PROC_SUPER_MAGIC 0x9fa0
 #define QNX4_SUPER_MAGIC 0x002f  
-
 #define REISERFS_SUPER_MAGIC 0x52654973  
-
 #define REISERFS_SUPER_MAGIC_STRING "ReIsErFs"
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define REISER2FS_SUPER_MAGIC_STRING "ReIsEr2Fs"
 #define REISER2FS_JR_SUPER_MAGIC_STRING "ReIsEr3Fs"
-
 #define SMB_SUPER_MAGIC 0x517B
 #define USBDEVICE_SUPER_MAGIC 0x9fa2
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define CGROUP_SUPER_MAGIC 0x27e0eb
-
 #define FUTEXFS_SUPER_MAGIC 0xBAD1DEA
 #define INOTIFYFS_SUPER_MAGIC 0x2BAD1DEA
-
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */