target/linux/ar71xx/patches-3.2/902-unaligned_access_hacks.patch

   1 --- a/arch/mips/include/asm/checksum.h
   2 +++ b/arch/mips/include/asm/checksum.h
   3 @@ -12,6 +12,7 @@
   4  #define _ASM_CHECKSUM_H
   5
   6  #include <linux/in6.h>
   7 +#include <linux/unaligned/packed_struct.h>
   8
   9  #include <asm/uaccess.h>
  10
  11 @@ -104,26 +105,30 @@ static inline __sum16 ip_fast_csum(const
  12         const unsigned int *stop = word + ihl;
  13         unsigned int csum;
  14         int carry;
  15 +       unsigned int w;
  16
  17 -       csum = word[0];
  18 -       csum += word[1];
  19 -       carry = (csum < word[1]);
  20 +       csum = __get_unaligned_cpu32(word++);
  21 +
  22 +       w = __get_unaligned_cpu32(word++);
  23 +       csum += w;
  24 +       carry = (csum < w);
  25         csum += carry;
  26
  27 -       csum += word[2];
  28 -       carry = (csum < word[2]);
  29 +       w = __get_unaligned_cpu32(word++);
  30 +       csum += w;
  31 +       carry = (csum < w);
  32         csum += carry;
  33
  34 -       csum += word[3];
  35 -       carry = (csum < word[3]);
  36 +       w = __get_unaligned_cpu32(word++);
  37 +       csum += w;
  38 +       carry = (csum < w);
  39         csum += carry;
  40
  41 -       word += 4;
  42         do {
  43 -               csum += *word;
  44 -               carry = (csum < *word);
  45 +               w = __get_unaligned_cpu32(word++);
  46 +               csum += w;
  47 +               carry = (csum < w);
  48                 csum += carry;
  49 -               word++;
  50         } while (word != stop);
  51
  52         return csum_fold(csum);
  53 --- a/include/linux/ip.h
  54 +++ b/include/linux/ip.h
  55 @@ -102,7 +102,7 @@ struct iphdr {
  56         __be32  saddr;
  57         __be32  daddr;
  58         /*The options start here. */
  59 -};
  60 +} __packed;
  61
  62  #ifdef __KERNEL__
  63  #include <linux/skbuff.h>
  64 --- a/include/linux/ipv6.h
  65 +++ b/include/linux/ipv6.h
  66 @@ -126,7 +126,7 @@ struct ipv6hdr {
  67
  68         struct  in6_addr        saddr;
  69         struct  in6_addr        daddr;
  70 -};
  71 +} __packed;
  72
  73  #ifdef __KERNEL__
  74  /*
  75 --- a/include/linux/tcp.h
  76 +++ b/include/linux/tcp.h
  77 @@ -54,7 +54,7 @@ struct tcphdr {
  78         __be16  window;
  79         __sum16 check;
  80         __be16  urg_ptr;
  81 -};
  82 +} __packed;
  83
  84  /*
  85   *     The union cast uses a gcc extension to avoid aliasing problems
  86 --- a/include/linux/udp.h
  87 +++ b/include/linux/udp.h
  88 @@ -24,7 +24,7 @@ struct udphdr {
  89         __be16  dest;
  90         __be16  len;
  91         __sum16 check;
  92 -};
  93 +} __packed;
  94
  95  /* UDP socket options */
  96  #define UDP_CORK       1       /* Never send partially complete segments */
  97 --- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
  98 +++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
  99 @@ -14,6 +14,7 @@
 100  #include <linux/skbuff.h>
 101  #include <linux/icmp.h>
 102  #include <linux/sysctl.h>
 103 +#include <linux/unaligned/packed_struct.h>
 104  #include <net/route.h>
 105  #include <net/ip.h>
 106
 107 @@ -44,8 +45,8 @@ static bool ipv4_pkt_to_tuple(const stru
 108         if (ap == NULL)
 109                 return false;
 110
 111 -       tuple->src.u3.ip = ap[0];
 112 -       tuple->dst.u3.ip = ap[1];
 113 +       tuple->src.u3.ip = __get_unaligned_cpu32(ap++);
 114 +       tuple->dst.u3.ip = __get_unaligned_cpu32(ap);
 115
 116         return true;
 117  }