[SK_BUFF]: Introduce skb_network_offset()

For the quite common 'skb->nh.raw - skb->data' sequence.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 4 deletions

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 1225e751b3f1..a059cc7be672 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -491,7 +491,7 @@ static int packet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet
                         skb_push(skb, skb->data - skb_mac_header(skb));
                 else if (skb->pkt_type == PACKET_OUTGOING) {
                         /* Special case: outgoing packets have ll header at head */
-                        skb_pull(skb, skb->nh.raw - skb->data);
+                        skb_pull(skb, skb_network_offset(skb));
                 }
         }
 
@@ -595,7 +595,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
                         skb_push(skb, skb->data - skb_mac_header(skb));
                 else if (skb->pkt_type == PACKET_OUTGOING) {
                         /* Special case: outgoing packets have ll header at head */
-                        skb_pull(skb, skb->nh.raw - skb->data);
+                        skb_pull(skb, skb_network_offset(skb));
                 }
         }
 
@@ -613,7 +613,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
         if (sk->sk_type == SOCK_DGRAM) {
                 macoff = netoff = TPACKET_ALIGN(TPACKET_HDRLEN) + 16;
         } else {
-                unsigned maclen = skb->nh.raw - skb->data;
+                unsigned maclen = skb_network_offset(skb);
                 netoff = TPACKET_ALIGN(TPACKET_HDRLEN + (maclen < 16 ? 16 : maclen));
                 macoff = netoff - maclen;
         }
@@ -1145,7 +1145,7 @@ static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
                 aux.tp_len = PACKET_SKB_CB(skb)->origlen;
                 aux.tp_snaplen = skb->len;
                 aux.tp_mac = 0;
-                aux.tp_net = skb->nh.raw - skb->data;
+                aux.tp_net = skb_network_offset(skb);
 
                 put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
         }