ipv6: Add rt6_get_cookie() function

Instead of doing the rt6->rt6i_node check whenever we need
to get the route's cookie.  Refactor it into rt6_get_cookie().
It is a prep work to handle FLOWI_FLAG_KNOWN_NH and also
percpu rt6_info later.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 17a0120ae5a5..e917d27328ea 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -331,7 +331,7 @@ out:
 
                 rt = (struct rt6_info *)dst;
                 t->dst = dst;
-                t->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
+                t->dst_cookie = rt6_get_cookie(rt);
                 pr_debug("rt6_dst:%pI6/%d rt6_src:%pI6\n",
                          &rt->rt6i_dst.addr, rt->rt6i_dst.plen,
                          &fl6->saddr);