diff --git a/libc/kernel/common/linux/mroute6.h b/libc/kernel/common/linux/mroute6.h
index 2b151b9..3d701da 100644
--- a/libc/kernel/common/linux/mroute6.h
+++ b/libc/kernel/common/linux/mroute6.h
@@ -7,98 +7,108 @@
  ***   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_MROUTE6_H
 #define __LINUX_MROUTE6_H
-
 #include <linux/types.h>
 #include <linux/sockios.h>
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MRT6_BASE 200
 #define MRT6_INIT (MRT6_BASE)  
 #define MRT6_DONE (MRT6_BASE+1)  
 #define MRT6_ADD_MIF (MRT6_BASE+2)  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MRT6_DEL_MIF (MRT6_BASE+3)  
 #define MRT6_ADD_MFC (MRT6_BASE+4)  
 #define MRT6_DEL_MFC (MRT6_BASE+5)  
 #define MRT6_VERSION (MRT6_BASE+6)  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MRT6_ASSERT (MRT6_BASE+7)  
 #define MRT6_PIM (MRT6_BASE+8)  
 #define MRT6_TABLE (MRT6_BASE+9)  
-
 #define SIOCGETMIFCNT_IN6 SIOCPROTOPRIVATE  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SIOCGETSGCNT_IN6 (SIOCPROTOPRIVATE+1)
 #define SIOCGETRPF (SIOCPROTOPRIVATE+2)
-
 #define MAXMIFS 32
 typedef unsigned long mifbitmap_t;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 typedef unsigned short mifi_t;
 #define ALL_MIFS ((mifi_t)(-1))
-
 #ifndef IF_SETSIZE
 #define IF_SETSIZE 256
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-
 typedef __u32 if_mask;
 #define NIFBITS (sizeof(if_mask) * 8)  
-
 #ifndef DIV_ROUND_UP
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define DIV_ROUND_UP(x,y) (((x) + ((y) - 1)) / (y))
 #endif
-
 typedef struct if_set {
  if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 } if_set;
-
 #define IF_SET(n, p) ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
 #define IF_CLR(n, p) ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
 #define IF_ISSET(n, p) ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IF_COPY(f, t) bcopy(f, t, sizeof(*(f)))
 #define IF_ZERO(p) bzero(p, sizeof(*(p)))
-
 struct mif6ctl {
  mifi_t mif6c_mifi;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned char mif6c_flags;
  unsigned char vifc_threshold;
  __u16 mif6c_pifi;
  unsigned int vifc_rate_limit;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-
 #define MIFF_REGISTER 0x1  
-
 struct mf6cctl {
  struct sockaddr_in6 mf6cc_origin;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct sockaddr_in6 mf6cc_mcastgrp;
  mifi_t mf6cc_parent;
  struct if_set mf6cc_ifset;
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct sioc_sg_req6 {
  struct sockaddr_in6 src;
  struct sockaddr_in6 grp;
  unsigned long pktcnt;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long bytecnt;
  unsigned long wrong_if;
 };
-
 struct sioc_mif_req6 {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  mifi_t mifi;
  unsigned long icount;
  unsigned long ocount;
  unsigned long ibytes;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long obytes;
 };
-
 struct mrt6msg {
 #define MRT6MSG_NOCACHE 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MRT6MSG_WRONGMIF 2
 #define MRT6MSG_WHOLEPKT 3  
  __u8 im6_mbz;
  __u8 im6_msgtype;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u16 im6_mif;
  __u32 im6_pad;
  struct in6_addr im6_src, im6_dst;
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif