diff --git a/libc/kernel/common/linux/in6.h b/libc/kernel/common/linux/in6.h
index d148dfd..a876669 100644
--- a/libc/kernel/common/linux/in6.h
+++ b/libc/kernel/common/linux/in6.h
@@ -7,169 +7,182 @@
  ***   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_IN6_H
 #define _LINUX_IN6_H
-
 #include <linux/types.h>
-
 struct in6_addr {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  union {
  __u8 u6_addr8[16];
  __be16 u6_addr16[8];
  __be32 u6_addr32[4];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  } in6_u;
 #define s6_addr in6_u.u6_addr8
 #define s6_addr16 in6_u.u6_addr16
 #define s6_addr32 in6_u.u6_addr32
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-
 struct sockaddr_in6 {
  unsigned short int sin6_family;
  __be16 sin6_port;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __be32 sin6_flowinfo;
  struct in6_addr sin6_addr;
  __u32 sin6_scope_id;
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct ipv6_mreq {
-
  struct in6_addr ipv6mr_multiaddr;
-
  int ipv6mr_ifindex;
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ipv6mr_acaddr ipv6mr_multiaddr
-
 struct in6_flowlabel_req {
  struct in6_addr flr_dst;
  __be32 flr_label;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u8 flr_action;
  __u8 flr_share;
  __u16 flr_flags;
  __u16 flr_expires;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u16 flr_linger;
  __u32 __flr_pad;
-
 };
-
 #define IPV6_FL_A_GET 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_FL_A_PUT 1
 #define IPV6_FL_A_RENEW 2
-
 #define IPV6_FL_F_CREATE 1
 #define IPV6_FL_F_EXCL 2
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_FL_S_NONE 0
 #define IPV6_FL_S_EXCL 1
 #define IPV6_FL_S_PROCESS 2
 #define IPV6_FL_S_USER 3
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_FL_S_ANY 255
-
 #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff
 #define IPV6_FLOWINFO_PRIORITY 0x0ff00000
-
 #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_PRIORITY_FILLER 0x0100
 #define IPV6_PRIORITY_UNATTENDED 0x0200
 #define IPV6_PRIORITY_RESERVED1 0x0300
 #define IPV6_PRIORITY_BULK 0x0400
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_PRIORITY_RESERVED2 0x0500
 #define IPV6_PRIORITY_INTERACTIVE 0x0600
 #define IPV6_PRIORITY_CONTROL 0x0700
 #define IPV6_PRIORITY_8 0x0800
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_PRIORITY_9 0x0900
 #define IPV6_PRIORITY_10 0x0a00
 #define IPV6_PRIORITY_11 0x0b00
 #define IPV6_PRIORITY_12 0x0c00
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_PRIORITY_13 0x0d00
 #define IPV6_PRIORITY_14 0x0e00
 #define IPV6_PRIORITY_15 0x0f00
-
 #define IPPROTO_HOPOPTS 0  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPPROTO_ROUTING 43  
 #define IPPROTO_FRAGMENT 44  
 #define IPPROTO_ICMPV6 58  
 #define IPPROTO_NONE 59  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPPROTO_DSTOPTS 60  
 #define IPPROTO_MH 135  
-
 #define IPV6_TLV_PAD0 0
 #define IPV6_TLV_PADN 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_TLV_ROUTERALERT 5
 #define IPV6_TLV_JUMBO 194
 #define IPV6_TLV_HAO 201  
-
 #define IPV6_ADDRFORM 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_2292PKTINFO 2
 #define IPV6_2292HOPOPTS 3
 #define IPV6_2292DSTOPTS 4
 #define IPV6_2292RTHDR 5
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_2292PKTOPTIONS 6
 #define IPV6_CHECKSUM 7
 #define IPV6_2292HOPLIMIT 8
 #define IPV6_NEXTHOP 9
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_AUTHHDR 10  
 #define IPV6_FLOWINFO 11
-
 #define IPV6_UNICAST_HOPS 16
 #define IPV6_MULTICAST_IF 17
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_MULTICAST_HOPS 18
 #define IPV6_MULTICAST_LOOP 19
 #define IPV6_ADD_MEMBERSHIP 20
 #define IPV6_DROP_MEMBERSHIP 21
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_ROUTER_ALERT 22
 #define IPV6_MTU_DISCOVER 23
 #define IPV6_MTU 24
 #define IPV6_RECVERR 25
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_V6ONLY 26
 #define IPV6_JOIN_ANYCAST 27
 #define IPV6_LEAVE_ANYCAST 28
-
 #define IPV6_PMTUDISC_DONT 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_PMTUDISC_WANT 1
 #define IPV6_PMTUDISC_DO 2
 #define IPV6_PMTUDISC_PROBE 3
-
 #define IPV6_FLOWLABEL_MGR 32
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_FLOWINFO_SEND 33
-
 #define IPV6_IPSEC_POLICY 34
 #define IPV6_XFRM_POLICY 35
-
 #define IPV6_RECVPKTINFO 49
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_PKTINFO 50
 #define IPV6_RECVHOPLIMIT 51
 #define IPV6_HOPLIMIT 52
 #define IPV6_RECVHOPOPTS 53
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_HOPOPTS 54
 #define IPV6_RTHDRDSTOPTS 55
 #define IPV6_RECVRTHDR 56
 #define IPV6_RTHDR 57
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_RECVDSTOPTS 58
 #define IPV6_DSTOPTS 59
 #define IPV6_RECVPATHMTU 60
 #define IPV6_PATHMTU 61
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_DONTFRAG 62
-
 #define IPV6_RECVTCLASS 66
 #define IPV6_TCLASS 67
-
 #define IPV6_ADDR_PREFERENCES 72
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_PREFER_SRC_TMP 0x0001
 #define IPV6_PREFER_SRC_PUBLIC 0x0002
 #define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100
 #define IPV6_PREFER_SRC_COA 0x0004
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_PREFER_SRC_HOME 0x0400
 #define IPV6_PREFER_SRC_CGA 0x0008
 #define IPV6_PREFER_SRC_NONCGA 0x0800
-
 #define IPV6_MINHOPCOUNT 73
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IPV6_ORIGDSTADDR 74
 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR
 #define IPV6_TRANSPARENT 75
-
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */