target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch

   1 --- a/arch/mips/include/asm/checksum.h
   2 +++ b/arch/mips/include/asm/checksum.h
   3 @@ -104,26 +104,30 @@ static inline __sum16 ip_fast_csum(const
   4         const unsigned int *stop = word + ihl;
   5         unsigned int csum;
   6         int carry;
   7 +       unsigned int w;
   8
   9 -       csum = word[0];
  10 -       csum += word[1];
  11 -       carry = (csum < word[1]);
  12 +       csum = net_hdr_word(word++);
  13 +
  14 +       w = net_hdr_word(word++);
  15 +       csum += w;
  16 +       carry = (csum < w);
  17         csum += carry;
  18
  19 -       csum += word[2];
  20 -       carry = (csum < word[2]);
  21 +       w = net_hdr_word(word++);
  22 +       csum += w;
  23 +       carry = (csum < w);
  24         csum += carry;
  25
  26 -       csum += word[3];
  27 -       carry = (csum < word[3]);
  28 +       w = net_hdr_word(word++);
  29 +       csum += w;
  30 +       carry = (csum < w);
  31         csum += carry;
  32
  33 -       word += 4;
  34         do {
  35 -               csum += *word;
  36 -               carry = (csum < *word);
  37 +               w = net_hdr_word(word++);
  38 +               csum += w;
  39 +               carry = (csum < w);
  40                 csum += carry;
  41 -               word++;
  42         } while (word != stop);
  43
  44         return csum_fold(csum);
  45 --- a/include/uapi/linux/ip.h
  46 +++ b/include/uapi/linux/ip.h
  47 @@ -102,7 +102,7 @@ struct iphdr {
  48         __be32  saddr;
  49         __be32  daddr;
  50         /*The options start here. */
  51 -};
  52 +} __attribute__((packed, aligned(2)));
  53
  54
  55  struct ip_auth_hdr {
  56 --- a/include/uapi/linux/ipv6.h
  57 +++ b/include/uapi/linux/ipv6.h
  58 @@ -123,7 +123,7 @@ struct ipv6hdr {
  59
  60         struct  in6_addr        saddr;
  61         struct  in6_addr        daddr;
  62 -};
  63 +} __attribute__((packed, aligned(2)));
  64
  65
  66  /* index values for the variables in ipv6_devconf */
  67 --- a/include/uapi/linux/tcp.h
  68 +++ b/include/uapi/linux/tcp.h
  69 @@ -54,7 +54,7 @@ struct tcphdr {
  70         __be16  window;
  71         __sum16 check;
  72         __be16  urg_ptr;
  73 -};
  74 +} __attribute__((packed, aligned(2)));
  75
  76  /*
  77   *     The union cast uses a gcc extension to avoid aliasing problems
  78 @@ -64,7 +64,7 @@ struct tcphdr {
  79  union tcp_word_hdr {
  80         struct tcphdr hdr;
  81         __be32            words[5];
  82 -};
  83 +} __attribute__((packed, aligned(2)));
  84
  85  #define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3])
  86
  87 --- a/include/uapi/linux/udp.h
  88 +++ b/include/uapi/linux/udp.h
  89 @@ -24,7 +24,7 @@ struct udphdr {
  90         __be16  dest;
  91         __be16  len;
  92         __sum16 check;
  93 -};
  94 +} __attribute__((packed, aligned(2)));
  95
  96  /* UDP socket options */
  97  #define UDP_CORK       1       /* Never send partially complete segments */
  98 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
  99 +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
 100 @@ -14,6 +14,7 @@
 101  #include <linux/skbuff.h>
 102  #include <linux/icmp.h>
 103  #include <linux/sysctl.h>
 104 +#include <linux/unaligned/packed_struct.h>
 105  #include <net/route.h>
 106  #include <net/ip.h>
 107
 108 @@ -39,8 +40,8 @@ static bool ipv4_pkt_to_tuple(const stru
 109         if (ap == NULL)
 110                 return false;
 111
 112 -       tuple->src.u3.ip = ap[0];
 113 -       tuple->dst.u3.ip = ap[1];
 114 +       tuple->src.u3.ip = net_hdr_word(ap++);
 115 +       tuple->dst.u3.ip = net_hdr_word(ap);
 116
 117         return true;
 118  }
 119 --- a/include/uapi/linux/icmp.h
 120 +++ b/include/uapi/linux/icmp.h
 121 @@ -80,7 +80,7 @@ struct icmphdr {
 122                 __be16  mtu;
 123         } frag;
 124    } un;
 125 -};
 126 +} __attribute__((packed, aligned(2)));
 127
 128
 129  /*
 130 --- a/net/ipv4/tcp_input.c
 131 +++ b/net/ipv4/tcp_input.c
 132 @@ -3842,13 +3842,14 @@ static bool tcp_parse_aligned_timestamp(
 133  {
 134         const __be32 *ptr = (const __be32 *)(th + 1);
 135
 136 -       if (*ptr == htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16)
 137 -                         | (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)) {
 138 +       if (net_hdr_word(ptr) ==
 139 +           htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
 140 +           (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)) {
 141                 tp->rx_opt.saw_tstamp = 1;
 142                 ++ptr;
 143 -               tp->rx_opt.rcv_tsval = ntohl(*ptr);
 144 +               tp->rx_opt.rcv_tsval = get_unaligned_be32(ptr);
 145                 ++ptr;
 146 -               tp->rx_opt.rcv_tsecr = ntohl(*ptr);
 147 +               tp->rx_opt.rcv_tsecr = get_unaligned_be32(ptr);
 148                 return true;
 149         }
 150         return false;
 151 --- a/include/uapi/linux/in6.h
 152 +++ b/include/uapi/linux/in6.h
 153 @@ -36,7 +36,7 @@ struct in6_addr {
 154  #define s6_addr                        in6_u.u6_addr8
 155  #define s6_addr16              in6_u.u6_addr16
 156  #define s6_addr32              in6_u.u6_addr32
 157 -};
 158 +} __attribute__((packed, aligned(2)));
 159
 160  /* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553
 161   * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined
 162 --- a/net/ipv6/af_inet6.c
 163 +++ b/net/ipv6/af_inet6.c
 164 @@ -61,6 +61,7 @@
 165  #endif
 166
 167  #include <asm/uaccess.h>
 168 +#include <asm/unaligned.h>
 169  #include <linux/mroute6.h>
 170
 171  MODULE_AUTHOR("Cast of dozens");
 172 @@ -687,7 +688,7 @@ bool ipv6_opt_accepted(const struct sock
 173                 if ((opt->hop && (np->rxopt.bits.hopopts ||
 174                                   np->rxopt.bits.ohopopts)) ||
 175                     ((IPV6_FLOWINFO_MASK &
 176 -                     *(__be32 *)skb_network_header(skb)) &&
 177 +                     net_hdr_word(skb_network_header(skb))) &&
 178                      np->rxopt.bits.rxflow) ||
 179                     (opt->srcrt && (np->rxopt.bits.srcrt ||
 180                      np->rxopt.bits.osrcrt)) ||
 181 @@ -880,7 +881,7 @@ static struct sk_buff **ipv6_gro_receive
 182                         continue;
 183
 184                 iph2 = ipv6_hdr(p);
 185 -               first_word = *(__be32 *)iph ^ *(__be32 *)iph2 ;
 186 +               first_word = net_hdr_word(iph) ^ net_hdr_word(iph2);
 187
 188                 /* All fields must match except length and Traffic Class. */
 189                 if (nlen != skb_network_header_len(p) ||
 190 --- a/net/ipv6/route.c
 191 +++ b/net/ipv6/route.c
 192 @@ -59,6 +59,7 @@
 193  #include <net/netlink.h>
 194
 195  #include <asm/uaccess.h>
 196 +#include <asm/unaligned.h>
 197
 198  #ifdef CONFIG_SYSCTL
 199  #include <linux/sysctl.h>
 200 @@ -938,7 +939,7 @@ void ip6_route_input(struct sk_buff *skb
 201                 .flowi6_iif = skb->dev->ifindex,
 202                 .daddr = iph->daddr,
 203                 .saddr = iph->saddr,
 204 -               .flowlabel = (* (__be32 *) iph) & IPV6_FLOWINFO_MASK,
 205 +               .flowlabel = net_hdr_word(iph) & IPV6_FLOWINFO_MASK,
 206                 .flowi6_mark = skb->mark,
 207                 .flowi6_proto = iph->nexthdr,
 208         };
 209 @@ -1108,7 +1109,7 @@ void ip6_update_pmtu(struct sk_buff *skb
 210         fl6.flowi6_flags = 0;
 211         fl6.daddr = iph->daddr;
 212         fl6.saddr = iph->saddr;
 213 -       fl6.flowlabel = (*(__be32 *) iph) & IPV6_FLOWINFO_MASK;
 214 +       fl6.flowlabel = net_hdr_word(iph) & IPV6_FLOWINFO_MASK,
 215
 216         dst = ip6_route_output(net, NULL, &fl6);
 217         if (!dst->error)
 218 @@ -1136,7 +1137,7 @@ void ip6_redirect(struct sk_buff *skb, s
 219         fl6.flowi6_flags = 0;
 220         fl6.daddr = iph->daddr;
 221         fl6.saddr = iph->saddr;
 222 -       fl6.flowlabel = (*(__be32 *) iph) & IPV6_FLOWINFO_MASK;
 223 +       fl6.flowlabel = net_hdr_word(iph) & IPV6_FLOWINFO_MASK,
 224
 225         dst = ip6_route_output(net, NULL, &fl6);
 226         if (!dst->error)
 227 --- a/net/ipv6/tcp_ipv6.c
 228 +++ b/net/ipv6/tcp_ipv6.c
 229 @@ -64,6 +64,7 @@
 230  #include <net/secure_seq.h>
 231  #include <net/tcp_memcontrol.h>
 232
 233 +#include <asm/unaligned.h>
 234  #include <asm/uaccess.h>
 235
 236  #include <linux/proc_fs.h>
 237 @@ -851,10 +852,10 @@ static void tcp_v6_send_response(struct
 238         topt = (__be32 *)(t1 + 1);
 239
 240         if (ts) {
 241 -               *topt++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
 242 -                               (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP);
 243 -               *topt++ = htonl(tcp_time_stamp);
 244 -               *topt++ = htonl(ts);
 245 +               put_unaligned_be32((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
 246 +                       (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP, topt++);
 247 +               put_unaligned_be32(tcp_time_stamp, topt++);
 248 +               put_unaligned_be32(ts, topt++);
 249         }
 250
 251  #ifdef CONFIG_TCP_MD5SIG
 252 --- a/include/linux/ipv6.h
 253 +++ b/include/linux/ipv6.h
 254 @@ -4,6 +4,7 @@
 255  #include <uapi/linux/ipv6.h>
 256
 257  #define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)
 258 +
 259  /*
 260   * This structure contains configuration options per IPv6 link.
 261   */
 262 --- a/net/ipv6/datagram.c
 263 +++ b/net/ipv6/datagram.c
 264 @@ -360,12 +360,12 @@ int ipv6_recv_error(struct sock *sk, str
 265                                 *(struct in6_addr *)(nh + serr->addr_offset);
 266                         if (np->sndflow)
 267                                 sin->sin6_flowinfo =
 268 -                                       (*(__be32 *)(nh + serr->addr_offset - 24) &
 269 -                                        IPV6_FLOWINFO_MASK);
 270 +                                       net_hdr_word(nh + serr->addr_offset - 24) &
 271 +                                        IPV6_FLOWINFO_MASK;
 272                         if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
 273                                 sin->sin6_scope_id = IP6CB(skb)->iif;
 274                 } else {
 275 -                       ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset),
 276 +                       ipv6_addr_set_v4mapped(net_hdr_word(nh + serr->addr_offset),
 277                                                &sin->sin6_addr);
 278                 }
 279         }
 280 @@ -492,9 +492,10 @@ int datagram_recv_ctl(struct sock *sk, s
 281                 put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass);
 282         }
 283
 284 -       if (np->rxopt.bits.rxflow && (*(__be32 *)nh & IPV6_FLOWINFO_MASK)) {
 285 -               __be32 flowinfo = *(__be32 *)nh & IPV6_FLOWINFO_MASK;
 286 -               put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
 287 +       if (np->rxopt.bits.rxflow) {
 288 +               __be32 flowinfo = net_hdr_word(nh) & IPV6_FLOWINFO_MASK;
 289 +               if (flowinfo)
 290 +                       put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
 291         }
 292
 293         /* HbH is allowed only once */
 294 @@ -680,12 +681,12 @@ int datagram_send_ctl(struct net *net, s
 295                         }
 296
 297                         if (fl6->flowlabel&IPV6_FLOWINFO_MASK) {
 298 -                               if ((fl6->flowlabel^*(__be32 *)CMSG_DATA(cmsg))&~IPV6_FLOWINFO_MASK) {
 299 +                               if ((fl6->flowlabel^net_hdr_word(CMSG_DATA(cmsg)))&~IPV6_FLOWINFO_MASK) {
 300                                         err = -EINVAL;
 301                                         goto exit_f;
 302                                 }
 303                         }
 304 -                       fl6->flowlabel = IPV6_FLOWINFO_MASK & *(__be32 *)CMSG_DATA(cmsg);
 305 +                       fl6->flowlabel = IPV6_FLOWINFO_MASK & net_hdr_word(CMSG_DATA(cmsg));
 306                         break;
 307
 308                 case IPV6_2292HOPOPTS:
 309 --- a/net/ipv6/ip6_gre.c
 310 +++ b/net/ipv6/ip6_gre.c
 311 @@ -445,7 +445,7 @@ static void ip6gre_err(struct sk_buff *s
 312
 313         t = ip6gre_tunnel_lookup(skb->dev, &ipv6h->daddr, &ipv6h->saddr,
 314                                 flags & GRE_KEY ?
 315 -                               *(((__be32 *)p) + (grehlen / 4) - 1) : 0,
 316 +                               net_hdr_word(((__be32 *)p) + (grehlen / 4) - 1) : 0,
 317                                 p[1]);
 318         if (t == NULL)
 319                 return;
 320 @@ -537,11 +537,11 @@ static int ip6gre_rcv(struct sk_buff *sk
 321                         offset += 4;
 322                 }
 323                 if (flags&GRE_KEY) {
 324 -                       key = *(__be32 *)(h + offset);
 325 +                       key = net_hdr_word(h + offset);
 326                         offset += 4;
 327                 }
 328                 if (flags&GRE_SEQ) {
 329 -                       seqno = ntohl(*(__be32 *)(h + offset));
 330 +                       seqno = ntohl(net_hdr_word(h + offset));
 331                         offset += 4;
 332                 }
 333         }
 334 @@ -788,7 +788,7 @@ static netdev_tx_t ip6gre_xmit2(struct s
 335          *      Push down and install the IP header.
 336          */
 337         ipv6h = ipv6_hdr(skb);
 338 -       *(__be32 *)ipv6h = fl6->flowlabel | htonl(0x60000000);
 339 +       net_hdr_word(ipv6h) = fl6->flowlabel | htonl(0x60000000);
 340         dsfield = INET_ECN_encapsulate(0, dsfield);
 341         ipv6_change_dsfield(ipv6h, ~INET_ECN_MASK, dsfield);
 342         ipv6h->hop_limit = tunnel->parms.hop_limit;
 343 @@ -805,7 +805,7 @@ static netdev_tx_t ip6gre_xmit2(struct s
 344
 345                 if (tunnel->parms.o_flags&GRE_SEQ) {
 346                         ++tunnel->o_seqno;
 347 -                       *ptr = htonl(tunnel->o_seqno);
 348 +                       net_hdr_word(ptr) = htonl(tunnel->o_seqno);
 349                         ptr--;
 350                 }
 351                 if (tunnel->parms.o_flags&GRE_KEY) {
 352 @@ -913,9 +913,9 @@ static inline int ip6gre_xmit_ipv6(struc
 353
 354         dsfield = ipv6_get_dsfield(ipv6h);
 355         if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
 356 -               fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_TCLASS_MASK);
 357 +               fl6.flowlabel |= net_hdr_word(ipv6h) & IPV6_TCLASS_MASK;
 358         if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
 359 -               fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_FLOWLABEL_MASK);
 360 +               fl6.flowlabel |= net_hdr_word(ipv6h) & IPV6_FLOWLABEL_MASK;
 361         if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
 362                 fl6.flowi6_mark = skb->mark;
 363
 364 @@ -1256,7 +1256,7 @@ static int ip6gre_header(struct sk_buff
 365         struct ipv6hdr *ipv6h = (struct ipv6hdr *)skb_push(skb, t->hlen);
 366         __be16 *p = (__be16 *)(ipv6h+1);
 367
 368 -       *(__be32 *)ipv6h = t->fl.u.ip6.flowlabel | htonl(0x60000000);
 369 +       net_hdr_word(ipv6h) = t->fl.u.ip6.flowlabel | htonl(0x60000000);
 370         ipv6h->hop_limit = t->parms.hop_limit;
 371         ipv6h->nexthdr = NEXTHDR_GRE;
 372         ipv6h->saddr = t->parms.laddr;
 373 --- a/net/ipv6/ip6_output.c
 374 +++ b/net/ipv6/ip6_output.c
 375 @@ -216,7 +216,7 @@ int ip6_xmit(struct sock *sk, struct sk_
 376         if (hlimit < 0)
 377                 hlimit = ip6_dst_hoplimit(dst);
 378
 379 -       *(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | fl6->flowlabel;
 380 +       net_hdr_word(hdr) = htonl(0x60000000 | (tclass << 20)) | fl6->flowlabel;
 381
 382         hdr->payload_len = htons(seg_len);
 383         hdr->nexthdr = proto;
 384 --- a/net/ipv6/ip6_tunnel.c
 385 +++ b/net/ipv6/ip6_tunnel.c
 386 @@ -1110,9 +1110,9 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, str
 387
 388         dsfield = ipv6_get_dsfield(ipv6h);
 389         if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
 390 -               fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_TCLASS_MASK);
 391 +               fl6.flowlabel |= net_hdr_word(ipv6h) & IPV6_TCLASS_MASK;
 392         if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
 393 -               fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_FLOWLABEL_MASK);
 394 +               fl6.flowlabel |= net_hdr_word(ipv6h) & IPV6_FLOWLABEL_MASK;
 395         if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
 396                 fl6.flowi6_mark = skb->mark;
 397
 398 --- a/net/ipv6/exthdrs.c
 399 +++ b/net/ipv6/exthdrs.c
 400 @@ -622,7 +622,7 @@ static bool ipv6_hop_jumbo(struct sk_buf
 401                 goto drop;
 402         }
 403
 404 -       pkt_len = ntohl(*(__be32 *)(nh + optoff + 2));
 405 +       pkt_len = ntohl(net_hdr_word(nh + optoff + 2));
 406         if (pkt_len <= IPV6_MAXPLEN) {
 407                 IP6_INC_STATS_BH(net, ipv6_skb_idev(skb),
 408                                  IPSTATS_MIB_INHDRERRORS);
 409 --- a/include/linux/types.h
 410 +++ b/include/linux/types.h
 411 @@ -211,5 +211,11 @@ struct callback_head {
 412  };
 413  #define rcu_head callback_head
 414
 415 +struct net_hdr_word {
 416 +       u32 words[1];
 417 +} __attribute__((packed, aligned(2)));
 418 +
 419 +#define net_hdr_word(_p) (((struct net_hdr_word *) (_p))->words[0])
 420 +
 421  #endif /*  __ASSEMBLY__ */
 422  #endif /* _LINUX_TYPES_H */
 423 --- a/net/ipv4/af_inet.c
 424 +++ b/net/ipv4/af_inet.c
 425 @@ -1388,8 +1388,8 @@ static struct sk_buff **inet_gro_receive
 426         if (unlikely(ip_fast_csum((u8 *)iph, 5)))
 427                 goto out_unlock;
 428
 429 -       id = ntohl(*(__be32 *)&iph->id);
 430 -       flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id ^ IP_DF));
 431 +       id = ntohl(net_hdr_word(&iph->id));
 432 +       flush = (u16)((ntohl(net_hdr_word(iph)) ^ skb_gro_len(skb)) | (id ^ IP_DF));
 433         id >>= 16;
 434
 435         for (p = *head; p; p = p->next) {
 436 --- a/net/ipv4/route.c
 437 +++ b/net/ipv4/route.c
 438 @@ -465,7 +465,7 @@ static struct neighbour *ipv4_neigh_look
 439         else if (skb)
 440                 pkey = &ip_hdr(skb)->daddr;
 441
 442 -       n = __ipv4_neigh_lookup(dev, *(__force u32 *)pkey);
 443 +       n = __ipv4_neigh_lookup(dev, net_hdr_word(pkey));
 444         if (n)
 445                 return n;
 446         return neigh_create(&arp_tbl, pkey, dev);
 447 --- a/net/ipv4/tcp_output.c
 448 +++ b/net/ipv4/tcp_output.c
 449 @@ -456,15 +456,17 @@ static void tcp_options_write(__be32 *pt
 450          */
 451         if (unlikely(OPTION_MD5 & options)) {
 452                 if (unlikely(OPTION_COOKIE_EXTENSION & options)) {
 453 -                       *ptr++ = htonl((TCPOPT_COOKIE << 24) |
 454 -                                      (TCPOLEN_COOKIE_BASE << 16) |
 455 -                                      (TCPOPT_MD5SIG << 8) |
 456 -                                      TCPOLEN_MD5SIG);
 457 +                       net_hdr_word(ptr++) =
 458 +                               htonl((TCPOPT_COOKIE << 24) |
 459 +                                     (TCPOLEN_COOKIE_BASE << 16) |
 460 +                                     (TCPOPT_MD5SIG << 8) |
 461 +                                     TCPOLEN_MD5SIG);
 462                 } else {
 463 -                       *ptr++ = htonl((TCPOPT_NOP << 24) |
 464 -                                      (TCPOPT_NOP << 16) |
 465 -                                      (TCPOPT_MD5SIG << 8) |
 466 -                                      TCPOLEN_MD5SIG);
 467 +                       net_hdr_word(ptr++) =
 468 +                               htonl((TCPOPT_NOP << 24) |
 469 +                                     (TCPOPT_NOP << 16) |
 470 +                                     (TCPOPT_MD5SIG << 8) |
 471 +                                     TCPOLEN_MD5SIG);
 472                 }
 473                 options &= ~OPTION_COOKIE_EXTENSION;
 474                 /* overload cookie hash location */
 475 @@ -473,26 +475,28 @@ static void tcp_options_write(__be32 *pt
 476         }
 477
 478         if (unlikely(opts->mss)) {
 479 -               *ptr++ = htonl((TCPOPT_MSS << 24) |
 480 -                              (TCPOLEN_MSS << 16) |
 481 -                              opts->mss);
 482 +               net_hdr_word(ptr++) =
 483 +                       htonl((TCPOPT_MSS << 24) | (TCPOLEN_MSS << 16) |
 484 +                             opts->mss);
 485         }
 486
 487         if (likely(OPTION_TS & options)) {
 488                 if (unlikely(OPTION_SACK_ADVERTISE & options)) {
 489 -                       *ptr++ = htonl((TCPOPT_SACK_PERM << 24) |
 490 -                                      (TCPOLEN_SACK_PERM << 16) |
 491 -                                      (TCPOPT_TIMESTAMP << 8) |
 492 -                                      TCPOLEN_TIMESTAMP);
 493 +                       net_hdr_word(ptr++) =
 494 +                               htonl((TCPOPT_SACK_PERM << 24) |
 495 +                                     (TCPOLEN_SACK_PERM << 16) |
 496 +                                     (TCPOPT_TIMESTAMP << 8) |
 497 +                                     TCPOLEN_TIMESTAMP);
 498                         options &= ~OPTION_SACK_ADVERTISE;
 499                 } else {
 500 -                       *ptr++ = htonl((TCPOPT_NOP << 24) |
 501 -                                      (TCPOPT_NOP << 16) |
 502 -                                      (TCPOPT_TIMESTAMP << 8) |
 503 -                                      TCPOLEN_TIMESTAMP);
 504 +                       net_hdr_word(ptr++) =
 505 +                               htonl((TCPOPT_NOP << 24) |
 506 +                                     (TCPOPT_NOP << 16) |
 507 +                                     (TCPOPT_TIMESTAMP << 8) |
 508 +                                     TCPOLEN_TIMESTAMP);
 509                 }
 510 -               *ptr++ = htonl(opts->tsval);
 511 -               *ptr++ = htonl(opts->tsecr);
 512 +               net_hdr_word(ptr++) = htonl(opts->tsval);
 513 +               net_hdr_word(ptr++) = htonl(opts->tsecr);
 514         }
 515
 516         /* Specification requires after timestamp, so do it now.
 517 @@ -512,19 +516,20 @@ static void tcp_options_write(__be32 *pt
 518                         __u8 *p = (__u8 *)ptr;
 519
 520                         /* 16-bit multiple */
 521 -                       *p++ = TCPOPT_COOKIE;
 522 -                       *p++ = TCPOLEN_COOKIE_BASE + cookie_size;
 523 -                       *p++ = *cookie_copy++;
 524 -                       *p++ = *cookie_copy++;
 525 +                       net_hdr_word(p++) = TCPOPT_COOKIE;
 526 +                       net_hdr_word(p++) = TCPOLEN_COOKIE_BASE + cookie_size;
 527 +                       net_hdr_word(p++) = *cookie_copy++;
 528 +                       net_hdr_word(p++) = *cookie_copy++;
 529                         ptr++;
 530                         cookie_size -= 2;
 531                 } else {
 532                         /* 32-bit multiple */
 533 -                       *ptr++ = htonl(((TCPOPT_NOP << 24) |
 534 -                                       (TCPOPT_NOP << 16) |
 535 -                                       (TCPOPT_COOKIE << 8) |
 536 -                                       TCPOLEN_COOKIE_BASE) +
 537 -                                      cookie_size);
 538 +                       net_hdr_word(ptr++) =
 539 +                               htonl(((TCPOPT_NOP << 24) |
 540 +                                      (TCPOPT_NOP << 16) |
 541 +                                      (TCPOPT_COOKIE << 8) |
 542 +                                      TCPOLEN_COOKIE_BASE) +
 543 +                                     cookie_size);
 544                 }
 545
 546                 if (cookie_size > 0) {
 547 @@ -534,17 +539,19 @@ static void tcp_options_write(__be32 *pt
 548         }
 549
 550         if (unlikely(OPTION_SACK_ADVERTISE & options)) {
 551 -               *ptr++ = htonl((TCPOPT_NOP << 24) |
 552 -                              (TCPOPT_NOP << 16) |
 553 -                              (TCPOPT_SACK_PERM << 8) |
 554 -                              TCPOLEN_SACK_PERM);
 555 +               net_hdr_word(ptr++) =
 556 +                       htonl((TCPOPT_NOP << 24) |
 557 +                             (TCPOPT_NOP << 16) |
 558 +                             (TCPOPT_SACK_PERM << 8) |
 559 +                             TCPOLEN_SACK_PERM);
 560         }
 561
 562         if (unlikely(OPTION_WSCALE & options)) {
 563 -               *ptr++ = htonl((TCPOPT_NOP << 24) |
 564 -                              (TCPOPT_WINDOW << 16) |
 565 -                              (TCPOLEN_WINDOW << 8) |
 566 -                              opts->ws);
 567 +               net_hdr_word(ptr++) =
 568 +                       htonl((TCPOPT_NOP << 24) |
 569 +                             (TCPOPT_WINDOW << 16) |
 570 +                             (TCPOLEN_WINDOW << 8) |
 571 +                             opts->ws);
 572         }
 573
 574         if (unlikely(opts->num_sack_blocks)) {
 575 @@ -552,16 +559,17 @@ static void tcp_options_write(__be32 *pt
 576                         tp->duplicate_sack : tp->selective_acks;
 577                 int this_sack;
 578
 579 -               *ptr++ = htonl((TCPOPT_NOP  << 24) |
 580 -                              (TCPOPT_NOP  << 16) |
 581 -                              (TCPOPT_SACK <<  8) |
 582 -                              (TCPOLEN_SACK_BASE + (opts->num_sack_blocks *
 583 +               net_hdr_word(ptr++) =
 584 +                       htonl((TCPOPT_NOP << 24) |
 585 +                             (TCPOPT_NOP << 16) |
 586 +                             (TCPOPT_SACK << 8) |
 587 +                             (TCPOLEN_SACK_BASE + (opts->num_sack_blocks *
 588                                                      TCPOLEN_SACK_PERBLOCK)));
 589
 590                 for (this_sack = 0; this_sack < opts->num_sack_blocks;
 591                      ++this_sack) {
 592 -                       *ptr++ = htonl(sp[this_sack].start_seq);
 593 -                       *ptr++ = htonl(sp[this_sack].end_seq);
 594 +                       net_hdr_word(ptr++) = htonl(sp[this_sack].start_seq);
 595 +                       net_hdr_word(ptr++) = htonl(sp[this_sack].end_seq);
 596                 }
 597
 598                 tp->rx_opt.dsack = 0;
 599 @@ -570,9 +578,10 @@ static void tcp_options_write(__be32 *pt
 600         if (unlikely(OPTION_FAST_OPEN_COOKIE & options)) {
 601                 struct tcp_fastopen_cookie *foc = opts->fastopen_cookie;
 602
 603 -               *ptr++ = htonl((TCPOPT_EXP << 24) |
 604 -                              ((TCPOLEN_EXP_FASTOPEN_BASE + foc->len) << 16) |
 605 -                              TCPOPT_FASTOPEN_MAGIC);
 606 +               net_hdr_word(ptr++) =
 607 +                       htonl((TCPOPT_EXP << 24) |
 608 +                             ((TCPOLEN_EXP_FASTOPEN_BASE + foc->len) << 16) |
 609 +                             TCPOPT_FASTOPEN_MAGIC);
 610
 611                 memcpy(ptr, foc->val, foc->len);
 612                 if ((foc->len & 3) == 2) {
 613 --- a/net/ipv4/igmp.c
 614 +++ b/net/ipv4/igmp.c
 615 @@ -470,7 +470,7 @@ static struct sk_buff *add_grec(struct s
 616                 if (!skb)
 617                         return NULL;
 618                 psrc = (__be32 *)skb_put(skb, sizeof(__be32));
 619 -               *psrc = psf->sf_inaddr;
 620 +               net_hdr_word(psrc) = psf->sf_inaddr;
 621                 scount++; stotal++;
 622                 if ((type == IGMPV3_ALLOW_NEW_SOURCES ||
 623                      type == IGMPV3_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
 624 --- a/net/ipv4/ip_gre.c
 625 +++ b/net/ipv4/ip_gre.c
 626 @@ -533,7 +533,7 @@ static void ipgre_err(struct sk_buff *sk
 627                 return;
 628
 629         if (flags & GRE_KEY)
 630 -               key = *(((__be32 *)p) + (grehlen / 4) - 1);
 631 +               key = net_hdr_word(((__be32 *)p) + (grehlen / 4) - 1);
 632
 633         switch (type) {
 634         default: