decnet: use correct RCU API to deref sk_dst_cache field

sock->sk_dst_cache is protected by RCU, therefore we should
use __sk_dst_get() to deref it once we lock the sock.

This fixes several sparse warnings.

Cc: linux-decnet-user@lists.sourceforge.net
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/decnet/dn_nsp_out.c b/net/decnet/dn_nsp_out.c
index 8a96047c7c94..1aaa51ebbda6 100644
--- a/net/decnet/dn_nsp_out.c
+++ b/net/decnet/dn_nsp_out.c
@@ -598,7 +598,7 @@ void dn_nsp_send_disc(struct sock *sk, unsigned char msgflg,
         if (reason == 0)
                 reason = le16_to_cpu(scp->discdata_out.opt_status);
 
-        dn_nsp_do_disc(sk, msgflg, reason, gfp, sk->sk_dst_cache, ddl,
+        dn_nsp_do_disc(sk, msgflg, reason, gfp, __sk_dst_get(sk), ddl,
                 scp->discdata_out.opt_data, scp->addrrem, scp->addrloc);
 }