'skb_push()'/'skb_postpush_rcsum()' can be replaced by an equivalent
'skb_push_rcsum()' which is less verbose.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
 
        err = nf_nat_packet(ct, ctinfo, hooknum, skb);
 push:
-       skb_push(skb, nh_off);
-       skb_postpush_rcsum(skb, skb->data, nh_off);
+       skb_push_rcsum(skb, nh_off);
 
        return err;
 }
        else
                err = ovs_ct_lookup(net, key, info, skb);
 
-       skb_push(skb, nh_ofs);
-       skb_postpush_rcsum(skb, skb->data, nh_ofs);
+       skb_push_rcsum(skb, nh_ofs);
        if (err)
                kfree_skb(skb);
        return err;
 
        if (unlikely(!skb))
                return;
 
-       if (skb->dev->type == ARPHRD_ETHER) {
-               skb_push(skb, ETH_HLEN);
-               skb_postpush_rcsum(skb, skb->data, ETH_HLEN);
-       }
+       if (skb->dev->type == ARPHRD_ETHER)
+               skb_push_rcsum(skb, ETH_HLEN);
+
        ovs_vport_receive(vport, skb, skb_tunnel_info(skb));
        return;
 error: