[SK_BUFF]: Introduce skb_reset_mac_header(skb)

For the common, open coded 'skb->mac.raw = skb->data' operation, so that we can
later turn skb->mac.raw into a offset, reducing the size of struct sk_buff in
64bit land while possibly keeping it as a pointer on 32bit.

This one touches just the most simple case, next will handle the slightly more
"complex" cases.

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

10 files changed, 16 insertions, 13 deletions

diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c
index e50b1482d792..692a23f9834d 100644
--- a/drivers/net/wireless/airo.c
+++ b/drivers/net/wireless/airo.c
@@ -3411,7 +3411,7 @@ badrx:
                         OUT4500( apriv, EVACK, EV_RX);
 
                         if (test_bit(FLAG_802_11, &apriv->flags)) {
-                                skb->mac.raw = skb->data;
+                                skb_reset_mac_header(skb);
                                 skb->pkt_type = PACKET_OTHERHOST;
                                 skb->dev = apriv->wifidev;
                                 skb->protocol = htons(ETH_P_802_2);
@@ -3746,7 +3746,7 @@ void mpi_receive_802_11 (struct airo_info *ai)
                 wireless_spy_update(ai->dev, sa, &wstats);
         }
 #endif /* IW_WIRELESS_SPY */
-        skb->mac.raw = skb->data;
+        skb_reset_mac_header(skb);
         skb->pkt_type = PACKET_OTHERHOST;
         skb->dev = ai->wifidev;
         skb->protocol = htons(ETH_P_802_2);
diff --git a/drivers/net/wireless/hostap/hostap_80211_rx.c b/drivers/net/wireless/hostap/hostap_80211_rx.c
index f78ee26d787a..e4082f9d766b 100644
--- a/drivers/net/wireless/hostap/hostap_80211_rx.c
+++ b/drivers/net/wireless/hostap/hostap_80211_rx.c
@@ -167,7 +167,7 @@ hdr->f.status = s; hdr->f.len = l; hdr->f.data = d
 
         ret = skb->len - phdrlen;
         skb->dev = dev;
-        skb->mac.raw = skb->data;
+        skb_reset_mac_header(skb);
         skb_pull(skb, hdrlen);
         if (prism_header)
                 skb_pull(skb, phdrlen);
@@ -1073,10 +1073,11 @@ void hostap_80211_rx(struct net_device *dev, struct sk_buff *skb,
 
         if (skb2 != NULL) {
                 /* send to wireless media */
+                skb2->dev = dev;
                 skb2->protocol = __constant_htons(ETH_P_802_3);
-                skb2->mac.raw = skb2->nh.raw = skb2->data;
+                skb_reset_mac_header(skb2);
+                skb2->nh.raw = skb2->data;
                 /* skb2->nh.raw = skb2->data + ETH_HLEN; */
-                skb2->dev = dev;
                 dev_queue_xmit(skb2);
         }
 
diff --git a/drivers/net/wireless/hostap/hostap_80211_tx.c b/drivers/net/wireless/hostap/hostap_80211_tx.c
index 4a5be70c0419..159baef18e4a 100644
--- a/drivers/net/wireless/hostap/hostap_80211_tx.c
+++ b/drivers/net/wireless/hostap/hostap_80211_tx.c
@@ -237,7 +237,7 @@ int hostap_data_start_xmit(struct sk_buff *skb, struct net_device *dev)
         iface->stats.tx_packets++;
         iface->stats.tx_bytes += skb->len;
 
-        skb->mac.raw = skb->data;
+        skb_reset_mac_header(skb);
         meta = (struct hostap_skb_tx_data *) skb->cb;
         memset(meta, 0, sizeof(*meta));
         meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
diff --git a/drivers/net/wireless/hostap/hostap_ap.c b/drivers/net/wireless/hostap/hostap_ap.c
index efb8cf3bd8ad..cc18f9686d27 100644
--- a/drivers/net/wireless/hostap/hostap_ap.c
+++ b/drivers/net/wireless/hostap/hostap_ap.c
@@ -982,7 +982,8 @@ static void prism2_send_mgmt(struct net_device *dev,
         meta->tx_cb_idx = tx_cb_idx;
 
         skb->dev = dev;
-        skb->mac.raw = skb->nh.raw = skb->data;
+        skb_reset_mac_header(skb);
+        skb->nh.raw = skb->data;
         dev_queue_xmit(skb);
 }
 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
diff --git a/drivers/net/wireless/hostap/hostap_hw.c b/drivers/net/wireless/hostap/hostap_hw.c
index 3079378fb8cd..9003ff7d151a 100644
--- a/drivers/net/wireless/hostap/hostap_hw.c
+++ b/drivers/net/wireless/hostap/hostap_hw.c
@@ -2217,7 +2217,7 @@ static void hostap_tx_callback(local_info_t *local,
                 memcpy(skb_put(skb, len), payload, len);
 
         skb->dev = local->dev;
-        skb->mac.raw = skb->data;
+        skb_reset_mac_header(skb);
 
         cb->func(skb, ok, cb->data);
 }
diff --git a/drivers/net/wireless/hostap/hostap_main.c b/drivers/net/wireless/hostap/hostap_main.c
index 9077e6edde34..0e29ff762879 100644
--- a/drivers/net/wireless/hostap/hostap_main.c
+++ b/drivers/net/wireless/hostap/hostap_main.c
@@ -1063,7 +1063,8 @@ int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u16 stype,
         meta->iface = netdev_priv(dev);
 
         skb->dev = dev;
-        skb->mac.raw = skb->nh.raw = skb->data;
+        skb_reset_mac_header(skb);
+        skb->nh.raw = skb->data;
         dev_queue_xmit(skb);
 
         return 0;
diff --git a/drivers/net/wireless/ipw2200.c b/drivers/net/wireless/ipw2200.c
index c878a2f3239c..b04c56a25cc5 100644
--- a/drivers/net/wireless/ipw2200.c
+++ b/drivers/net/wireless/ipw2200.c
@@ -8133,7 +8133,7 @@ static void ipw_handle_mgmt_packet(struct ipw_priv *priv,
                 skb->dev = priv->ieee->dev;
 
                 /* Point raw at the ieee80211_stats */
-                skb->mac.raw = skb->data;
+                skb_reset_mac_header(skb);
 
                 skb->pkt_type = PACKET_OTHERHOST;
                 skb->protocol = __constant_htons(ETH_P_80211_STATS);
diff --git a/drivers/net/wireless/orinoco.c b/drivers/net/wireless/orinoco.c
index 3f9d78d059b5..f1415bff527f 100644
--- a/drivers/net/wireless/orinoco.c
+++ b/drivers/net/wireless/orinoco.c
@@ -770,7 +770,7 @@ static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid,
 
         /* Copy the 802.11 header to the skb */
         memcpy(skb_put(skb, hdrlen), &(desc->frame_ctl), hdrlen);
-        skb->mac.raw = skb->data;
+        skb_reset_mac_header(skb);
 
         /* If any, copy the data from the card to the skb */
         if (datalen > 0) {
diff --git a/drivers/net/wireless/prism54/islpci_eth.c b/drivers/net/wireless/prism54/islpci_eth.c
index fc2e0f3a896e..6ebfff034242 100644
--- a/drivers/net/wireless/prism54/islpci_eth.c
+++ b/drivers/net/wireless/prism54/islpci_eth.c
@@ -303,7 +303,7 @@ islpci_monitor_rx(islpci_private *priv, struct sk_buff **skb)
                 skb_pull(*skb, sizeof (struct rfmon_header));
 
         (*skb)->protocol = htons(ETH_P_802_2);
-        (*skb)->mac.raw = (*skb)->data;
+        skb_reset_mac_header(*skb);
         (*skb)->pkt_type = PACKET_OTHERHOST;
 
         return 0;
diff --git a/drivers/net/wireless/strip.c b/drivers/net/wireless/strip.c
index f5ce1c6063d8..2a299a0676a6 100644
--- a/drivers/net/wireless/strip.c
+++ b/drivers/net/wireless/strip.c
@@ -2009,7 +2009,7 @@ static void deliver_packet(struct strip *strip_info, STRIP_Header * header,
                        packetlen);
                 skb->dev = get_strip_dev(strip_info);
                 skb->protocol = header->protocol;
-                skb->mac.raw = skb->data;
+                skb_reset_mac_header(skb);
 
                 /* Having put a fake header on the front of the sk_buff for the */
                 /* benefit of tools like tcpdump, skb_pull now 'consumes' that  */