[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>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 2b70774be61f..da673ef75e12 100644
--- 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;