diff --git a/libc/kernel/common/linux/in.h b/libc/kernel/common/linux/in.h
index 894e2da..7fb0cad 100644
--- a/libc/kernel/common/linux/in.h
+++ b/libc/kernel/common/linux/in.h
@@ -7,205 +7,214 @@
  ***   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_IN_H
 #define _LINUX_IN_H
-
 #include <linux/types.h>
 #include <linux/socket.h>
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 enum {
  IPPROTO_IP = 0,
  IPPROTO_ICMP = 1,
  IPPROTO_IGMP = 2,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  IPPROTO_IPIP = 4,
  IPPROTO_TCP = 6,
  IPPROTO_EGP = 8,
  IPPROTO_PUP = 12,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  IPPROTO_UDP = 17,
  IPPROTO_IDP = 22,
  IPPROTO_DCCP = 33,
  IPPROTO_RSVP = 46,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  IPPROTO_GRE = 47,
-
  IPPROTO_IPV6 = 41,
-
  IPPROTO_ESP = 50,
  IPPROTO_AH = 51,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  IPPROTO_PIM = 103,
-
  IPPROTO_COMP = 108,
  IPPROTO_SCTP = 132,
-
  IPPROTO_RAW = 255,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  IPPROTO_MAX
 };
-
 struct in_addr {
  __u32 s_addr;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-
 #define IP_TOS 1
 #define IP_TTL 2
 #define IP_HDRINCL 3
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IP_OPTIONS 4
 #define IP_ROUTER_ALERT 5
 #define IP_RECVOPTS 6
 #define IP_RETOPTS 7
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IP_PKTINFO 8
 #define IP_PKTOPTIONS 9
 #define IP_MTU_DISCOVER 10
 #define IP_RECVERR 11
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IP_RECVTTL 12
 #define IP_RECVTOS 13
 #define IP_MTU 14
 #define IP_FREEBIND 15
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IP_IPSEC_POLICY 16
 #define IP_XFRM_POLICY 17
 #define IP_PASSSEC 18
-
 #define IP_RECVRETOPTS IP_RETOPTS
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IP_PMTUDISC_DONT 0  
 #define IP_PMTUDISC_WANT 1  
 #define IP_PMTUDISC_DO 2  
-
 #define IP_MULTICAST_IF 32
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IP_MULTICAST_TTL 33
 #define IP_MULTICAST_LOOP 34
 #define IP_ADD_MEMBERSHIP 35
 #define IP_DROP_MEMBERSHIP 36
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IP_UNBLOCK_SOURCE 37
 #define IP_BLOCK_SOURCE 38
 #define IP_ADD_SOURCE_MEMBERSHIP 39
 #define IP_DROP_SOURCE_MEMBERSHIP 40
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IP_MSFILTER 41
 #define MCAST_JOIN_GROUP 42
 #define MCAST_BLOCK_SOURCE 43
 #define MCAST_UNBLOCK_SOURCE 44
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MCAST_LEAVE_GROUP 45
 #define MCAST_JOIN_SOURCE_GROUP 46
 #define MCAST_LEAVE_SOURCE_GROUP 47
 #define MCAST_MSFILTER 48
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MCAST_EXCLUDE 0
 #define MCAST_INCLUDE 1
-
 #define IP_DEFAULT_MULTICAST_TTL 1
 #define IP_DEFAULT_MULTICAST_LOOP 1
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct ip_mreq
 {
  struct in_addr imr_multiaddr;
  struct in_addr imr_interface;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-
 struct ip_mreqn
 {
  struct in_addr imr_multiaddr;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct in_addr imr_address;
  int imr_ifindex;
 };
-
 struct ip_mreq_source {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u32 imr_multiaddr;
  __u32 imr_interface;
  __u32 imr_sourceaddr;
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct ip_msfilter {
  __u32 imsf_multiaddr;
  __u32 imsf_interface;
  __u32 imsf_fmode;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u32 imsf_numsrc;
  __u32 imsf_slist[1];
 };
-
 #define IP_MSFILTER_SIZE(numsrc)   (sizeof(struct ip_msfilter) - sizeof(__u32)   + (numsrc) * sizeof(__u32))
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct group_req
 {
  __u32 gr_interface;
  struct __kernel_sockaddr_storage gr_group;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-
 struct group_source_req
 {
  __u32 gsr_interface;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct __kernel_sockaddr_storage gsr_group;
  struct __kernel_sockaddr_storage gsr_source;
 };
-
 struct group_filter
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 {
  __u32 gf_interface;
  struct __kernel_sockaddr_storage gf_group;
  __u32 gf_fmode;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u32 gf_numsrc;
  struct __kernel_sockaddr_storage gf_slist[1];
 };
-
 #define GROUP_FILTER_SIZE(numsrc)   (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage)   + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct in_pktinfo
 {
  int ipi_ifindex;
  struct in_addr ipi_spec_dst;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct in_addr ipi_addr;
 };
-
 #define __SOCK_SIZE__ 16  
 struct sockaddr_in {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  sa_family_t sin_family;
  unsigned short int sin_port;
  struct in_addr sin_addr;
-
  unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  sizeof(unsigned short int) - sizeof(struct in_addr)];
 };
 #define sin_zero __pad  
-
 #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IN_CLASSA_NET 0xff000000
 #define IN_CLASSA_NSHIFT 24
 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
 #define IN_CLASSA_MAX 128
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
 #define IN_CLASSB_NET 0xffff0000
 #define IN_CLASSB_NSHIFT 16
 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IN_CLASSB_MAX 65536
-
 #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
 #define IN_CLASSC_NET 0xffffff00
 #define IN_CLASSC_NSHIFT 8
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
-
 #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
 #define IN_MULTICAST(a) IN_CLASSD(a)
 #define IN_MULTICAST_NET 0xF0000000
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
 #define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
-
 #define INADDR_ANY ((unsigned long int) 0x00000000)
-
 #define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define INADDR_NONE ((unsigned long int) 0xffffffff)
-
 #define IN_LOOPBACKNET 127
-
 #define INADDR_LOOPBACK 0x7f000001  
 #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define INADDR_UNSPEC_GROUP 0xe0000000U  
 #define INADDR_ALLHOSTS_GROUP 0xe0000001U  
 #define INADDR_ALLRTRS_GROUP 0xe0000002U  
 #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU  
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <asm/byteorder.h> 
-
 #endif