Staging: rt2860: Use skb_tail_pointer

rt2860 uses skb->tail directly. This patch uses the tail pointer macros
instead.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/rt2860/rt_linux.c

@@ -462,9 +462,9 @@ void *duplicate_pkt(struct rt_rtmp_adapter *pAd,
 	if ((skb =
 	     __dev_alloc_skb(HdrLen + DataSize + 2, MEM_ALLOC_FLAG)) != NULL) {
 		skb_reserve(skb, 2);
-		NdisMoveMemory(skb->tail, pHeader802_3, HdrLen);
+		NdisMoveMemory(skb_tail_pointer(skb), pHeader802_3, HdrLen);
 		skb_put(skb, HdrLen);
-		NdisMoveMemory(skb->tail, pData, DataSize);
+		NdisMoveMemory(skb_tail_pointer(skb), pData, DataSize);
 		skb_put(skb, DataSize);
 		skb->dev = get_netdev_from_bssid(pAd, FromWhichBSSID);
 		pPacket = OSPKT_TO_RTPKT(skb);
@@ -515,7 +515,7 @@ void *ClonePacket(struct rt_rtmp_adapter *pAd,
 		pClonedPkt->dev = pRxPkt->dev;
 		pClonedPkt->data = pData;
 		pClonedPkt->len = DataSize;
-		pClonedPkt->tail = pClonedPkt->data + pClonedPkt->len;
+		skb_set_tail_pointer(pClonedPkt, DataSize)
 		ASSERT(DataSize < 1530);
 	}
 	return pClonedPkt;
@@ -535,7 +535,7 @@ void update_os_packet_info(struct rt_rtmp_adapter *pAd,
 	pOSPkt->dev = get_netdev_from_bssid(pAd, FromWhichBSSID);
 	pOSPkt->data = pRxBlk->pData;
 	pOSPkt->len = pRxBlk->DataSize;
-	pOSPkt->tail = pOSPkt->data + pOSPkt->len;
+	skb_set_tail_pointer(pOSPkt, pOSPkt->len);
 }
 
 void wlan_802_11_to_802_3_packet(struct rt_rtmp_adapter *pAd,
@@ -553,7 +553,7 @@ void wlan_802_11_to_802_3_packet(struct rt_rtmp_adapter *pAd,
 	pOSPkt->dev = get_netdev_from_bssid(pAd, FromWhichBSSID);
 	pOSPkt->data = pRxBlk->pData;
 	pOSPkt->len = pRxBlk->DataSize;
-	pOSPkt->tail = pOSPkt->data + pOSPkt->len;
+	skb_set_tail_pointer(pOSPkt, pOSPkt->len);
 
 	/* */
 	/* copy 802.3 header */

drivers/staging/rt2860/rt_linux.h

@@ -658,9 +658,9 @@ void linux_pci_unmap_single(void *handle, dma_addr_t dma_addr, size_t size,
 		(RTPKT_TO_OSPKT(_pkt)->len) = (_len)
 
 #define GET_OS_PKT_DATATAIL(_pkt) \
-		(RTPKT_TO_OSPKT(_pkt)->tail)
+		(skb_tail_pointer(RTPKT_TO_OSPKT(_pkt))
 #define SET_OS_PKT_DATATAIL(_pkt, _start, _len)	\
-		((RTPKT_TO_OSPKT(_pkt))->tail) = (u8 *)((_start) + (_len))
+		(skb_set_tail_pointer(RTPKT_TO_OSPKT(_pkt), _len))
 
 #define GET_OS_PKT_HEAD(_pkt) \
 		(RTPKT_TO_OSPKT(_pkt)->head)