diff --git a/libc/kernel/common/linux/skbuff.h b/libc/kernel/common/linux/skbuff.h
index 82140a6..d52b46c 100644
--- a/libc/kernel/common/linux/skbuff.h
+++ b/libc/kernel/common/linux/skbuff.h
@@ -7,158 +7,160 @@
  ***   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_SKBUFF_H
 #define _LINUX_SKBUFF_H
-
 #include <linux/kernel.h>
 #include <linux/compiler.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/time.h>
 #include <linux/cache.h>
-
 #include <asm/atomic.h>
 #include <asm/types.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/spinlock.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
 #include <linux/poll.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/net.h>
 #include <linux/textsearch.h>
 #include <net/checksum.h>
 #include <linux/dmaengine.h>
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define HAVE_ALLOC_SKB  
 #define HAVE_ALIGNABLE_SKB  
-
 #define CHECKSUM_NONE 0
 #define CHECKSUM_HW 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define CHECKSUM_UNNECESSARY 2
-
 #define SKB_DATA_ALIGN(X) (((X) + (SMP_CACHE_BYTES - 1)) &   ~(SMP_CACHE_BYTES - 1))
 #define SKB_MAX_ORDER(X, ORDER) (((PAGE_SIZE << (ORDER)) - (X) -   sizeof(struct skb_shared_info)) &   ~(SMP_CACHE_BYTES - 1))
 #define SKB_MAX_HEAD(X) (SKB_MAX_ORDER((X), 0))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SKB_MAX_ALLOC (SKB_MAX_ORDER(0, 2))
-
 struct net_device;
-
 struct sk_buff_head {
-
  struct sk_buff *next;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct sk_buff *prev;
-
  __u32 qlen;
  spinlock_t lock;
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct sk_buff;
-
 #define MAX_SKB_FRAGS (65536/PAGE_SIZE + 2)
-
 typedef struct skb_frag_struct skb_frag_t;
-
 struct skb_frag_struct {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct page *page;
  __u16 page_offset;
  __u16 size;
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct skb_shared_info {
  atomic_t dataref;
  unsigned short nr_frags;
  unsigned short gso_size;
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned short gso_segs;
  unsigned short gso_type;
  unsigned int ip6_frag_id;
  struct sk_buff *frag_list;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  skb_frag_t frags[MAX_SKB_FRAGS];
 };
-
 #define SKB_DATAREF_SHIFT 16
 #define SKB_DATAREF_MASK ((1 << SKB_DATAREF_SHIFT) - 1)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct skb_timeval {
  u32 off_sec;
  u32 off_usec;
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 enum {
  SKB_FCLONE_UNAVAILABLE,
  SKB_FCLONE_ORIG,
  SKB_FCLONE_CLONE,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-
 enum {
  SKB_GSO_TCPV4 = 1 << 0,
  SKB_GSO_UDP = 1 << 1,
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  SKB_GSO_DODGY = 1 << 2,
-
  SKB_GSO_TCP_ECN = 1 << 3,
-
  SKB_GSO_TCPV6 = 1 << 4,
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct sk_buff {
-
  struct sk_buff *next;
  struct sk_buff *prev;
-
  struct sock *sk;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct skb_timeval tstamp;
  struct net_device *dev;
  struct net_device *input_dev;
-
  union {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct tcphdr *th;
  struct udphdr *uh;
  struct icmphdr *icmph;
  struct igmphdr *igmph;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct iphdr *ipiph;
  struct ipv6hdr *ipv6h;
  unsigned char *raw;
  } h;
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  union {
  struct iphdr *iph;
  struct ipv6hdr *ipv6h;
  struct arphdr *arph;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned char *raw;
  } nh;
-
  union {
  unsigned char *raw;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  } mac;
-
  struct dst_entry *dst;
  struct sec_path *sp;
-
  char cb[48];
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int len,
  data_len,
  mac_len,
  csum;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u32 priority;
  __u8 local_df:1,
  cloned:1,
  ip_summed:2,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  nohdr:1,
  nfctinfo:3;
  __u8 pkt_type:3,
  fclone:2,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  ipvs_property:1;
  __be16 protocol;
-
  void (*destructor)(struct sk_buff *skb);
-
  unsigned int truesize;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  atomic_t users;
  unsigned char *head,
  *data,
  *tail,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  *end;
 };
-
 #endif