[IPV6] MROUTE: Use skb_tail_pointer(skb) instead of skb->tail.

This bug resulted in compilation error on 64bit machines.
Pointed out by Rami Rosen <roszenrami@gmail.com>.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 2b70774be61fb5b6afe5ce1191086e80dcea2a85..da673ef75e125e91ab7b3f4b2ff45e95e0e4dbcc 100644 (file)
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -733,7 +733,7 @@ static void ip6mr_cache_resolve(struct mfc6_cache *uc, struct mfc6_cache *c)
                        struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr));
 
                        if (ip6mr_fill_mroute(skb, c, NLMSG_DATA(nlh)) > 0) {
-                               nlh->nlmsg_len = skb->tail - (u8 *)nlh;
+                               nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh;
                        } else {
                                nlh->nlmsg_type = NLMSG_ERROR;
                                nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr));
@@ -1562,7 +1562,7 @@ ip6mr_fill_mroute(struct sk_buff *skb, struct mfc6_cache *c, struct rtmsg *rtm)
        int ct;
        struct rtnexthop *nhp;
        struct net_device *dev = vif6_table[c->mf6c_parent].dev;
-       u8 *b = skb->tail;
+       u8 *b = skb_tail_pointer(skb);
        struct rtattr *mp_head;
 
        if (dev)
@@ -1582,7 +1582,7 @@ ip6mr_fill_mroute(struct sk_buff *skb, struct mfc6_cache *c, struct rtmsg *rtm)
                }
        }
        mp_head->rta_type = RTA_MULTIPATH;
-       mp_head->rta_len = skb->tail - (u8 *)mp_head;
+       mp_head->rta_len = skb_tail_pointer(skb) - (u8 *)mp_head;
        rtm->rtm_type = RTN_MULTICAST;
        return 1;