[SK_BUFF]: Introduce skb_copy_from_linear_data{_offset}

To clearly state the intent of copying from linear sk_buffs, _offset being a overly long variant but interesting for the sake of saving some bytes. Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
josf · Apr 26, 2007 · d626f62 · d626f62
1 parent 2a123b8
commit d626f62
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Showing 133 changed files with 321 additions and 230 deletions.
diff --git a/arch/ia64/sn/kernel/xpnet.c b/arch/ia64/sn/kernel/xpnet.c
@@ -566,7 +566,8 @@ xpnet_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 			msg->version = XPNET_VERSION_EMBED;
 			dev_dbg(xpnet, "calling memcpy(0x%p, 0x%p, 0x%lx)\n",
 				&msg->data, skb->data, (size_t) embedded_bytes);
-			memcpy(&msg->data, skb->data, (size_t) embedded_bytes);
+			skb_copy_from_linear_data(skb, &msg->data,
+						  (size_t)embedded_bytes);
 		} else {
 			msg->version = XPNET_VERSION;
 		}

diff --git a/drivers/atm/atmtcp.c b/drivers/atm/atmtcp.c
@@ -221,7 +221,7 @@ static int atmtcp_v_send(struct atm_vcc *vcc,struct sk_buff *skb)
 	hdr->vpi = htons(vcc->vpi);
 	hdr->vci = htons(vcc->vci);
 	hdr->length = htonl(skb->len);
-	memcpy(skb_put(new_skb,skb->len),skb->data,skb->len);
+	skb_copy_from_linear_data(skb, skb_put(new_skb, skb->len), skb->len);
 	if (vcc->pop) vcc->pop(vcc,skb);
 	else dev_kfree_skb(skb);
 	out_vcc->push(out_vcc,new_skb);
@@ -310,7 +310,7 @@ static int atmtcp_c_send(struct atm_vcc *vcc,struct sk_buff *skb)
 		goto done;
 	}
 	__net_timestamp(new_skb);
-	memcpy(skb_put(new_skb,skb->len),skb->data,skb->len);
+	skb_copy_from_linear_data(skb, skb_put(new_skb, skb->len), skb->len);
 	out_vcc->push(out_vcc,new_skb);
 	atomic_inc(&vcc->stats->tx);
 	atomic_inc(&out_vcc->stats->rx);

diff --git a/drivers/atm/nicstar.c b/drivers/atm/nicstar.c
@@ -2395,7 +2395,7 @@ static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe)
                skb->destructor = ns_lb_destructor;
 #endif /* NS_USE_DESTRUCTORS */
                skb_push(skb, NS_SMBUFSIZE);
-               memcpy(skb->data, sb->data, NS_SMBUFSIZE);
+               skb_copy_from_linear_data(sb, skb->data, NS_SMBUFSIZE);
                skb_put(skb, len - NS_SMBUFSIZE);
                ATM_SKB(skb)->vcc = vcc;
 	       __net_timestamp(skb);
@@ -2479,7 +2479,7 @@ static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe)
 	 {
             /* Copy the small buffer to the huge buffer */
             sb = (struct sk_buff *) iov->iov_base;
-            memcpy(hb->data, sb->data, iov->iov_len);
+            skb_copy_from_linear_data(sb, hb->data, iov->iov_len);
             skb_put(hb, iov->iov_len);
             remaining = len - iov->iov_len;
             iov++;
@@ -2491,7 +2491,7 @@ static void dequeue_rx(ns_dev *card, ns_rsqe *rsqe)
             {
                lb = (struct sk_buff *) iov->iov_base;
                tocopy = min_t(int, remaining, iov->iov_len);
-               memcpy(skb_tail_pointer(hb), lb->data, tocopy);
+               skb_copy_from_linear_data(lb, skb_tail_pointer(hb), tocopy);
                skb_put(hb, tocopy);
                iov++;
                remaining -= tocopy;

diff --git a/drivers/bluetooth/bfusb.c b/drivers/bluetooth/bfusb.c
@@ -527,7 +527,7 @@ static int bfusb_send_frame(struct sk_buff *skb)
 		buf[2] = (size == BFUSB_MAX_BLOCK_SIZE) ? 0 : size;
 
 		memcpy(skb_put(nskb, 3), buf, 3);
-		memcpy(skb_put(nskb, size), skb->data + sent, size);
+		skb_copy_from_linear_data_offset(skb, sent, skb_put(nskb, size), size);
 
 		sent  += size;
 		count -= size;

diff --git a/drivers/bluetooth/bpa10x.c b/drivers/bluetooth/bpa10x.c
@@ -231,7 +231,7 @@ static void bpa10x_wakeup(struct bpa10x_data *data)
 		cr = (struct usb_ctrlrequest *) urb->setup_packet;
 		cr->wLength = __cpu_to_le16(skb->len);
 
-		memcpy(urb->transfer_buffer, skb->data, skb->len);
+		skb_copy_from_linear_data(skb, urb->transfer_buffer, skb->len);
 		urb->transfer_buffer_length = skb->len;
 
 		err = usb_submit_urb(urb, GFP_ATOMIC);
@@ -250,7 +250,7 @@ static void bpa10x_wakeup(struct bpa10x_data *data)
 		skb = skb_dequeue(&data->tx_queue);
 
 	if (skb) {
-		memcpy(urb->transfer_buffer, skb->data, skb->len);
+		skb_copy_from_linear_data(skb, urb->transfer_buffer, skb->len);
 		urb->transfer_buffer_length = skb->len;
 
 		err = usb_submit_urb(urb, GFP_ATOMIC);

diff --git a/drivers/bluetooth/dtl1_cs.c b/drivers/bluetooth/dtl1_cs.c
@@ -425,7 +425,7 @@ static int dtl1_hci_send_frame(struct sk_buff *skb)
 		return -ENOMEM;
 
 	skb_reserve(s, NSHL);
-	memcpy(skb_put(s, skb->len), skb->data, skb->len);
+	skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
 	if (skb->len & 0x0001)
 		*skb_put(s, 1) = 0;	/* PAD */
 

diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
@@ -4169,7 +4169,7 @@ static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
 	netif_stop_queue(dev);
 
 	/* copy data to device buffers */
-	memcpy(info->tx_buf, skb->data, skb->len);
+	skb_copy_from_linear_data(skb, info->tx_buf, skb->len);
 	info->tx_get = 0;
 	info->tx_put = info->tx_count = skb->len;
 

diff --git a/drivers/infiniband/hw/cxgb3/iwch_cm.c b/drivers/infiniband/hw/cxgb3/iwch_cm.c
@@ -821,7 +821,8 @@ static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb)
 	/*
 	 * copy the new data into our accumulation buffer.
 	 */
-	memcpy(&(ep->mpa_pkt[ep->mpa_pkt_len]), skb->data, skb->len);
+	skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
+				  skb->len);
 	ep->mpa_pkt_len += skb->len;
 
 	/*
@@ -940,7 +941,8 @@ static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb)
 	/*
 	 * Copy the new data into our accumulation buffer.
 	 */
-	memcpy(&(ep->mpa_pkt[ep->mpa_pkt_len]), skb->data, skb->len);
+	skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
+				  skb->len);
 	ep->mpa_pkt_len += skb->len;
 
 	/*
@@ -1619,7 +1621,8 @@ static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx)
 	PDBG("%s ep %p\n", __FUNCTION__, ep);
 	skb_pull(skb, sizeof(struct cpl_rdma_terminate));
 	PDBG("%s saving %d bytes of term msg\n", __FUNCTION__, skb->len);
-	memcpy(ep->com.qp->attr.terminate_buffer, skb->data, skb->len);
+	skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer,
+				  skb->len);
 	ep->com.qp->attr.terminate_msg_len = skb->len;
 	ep->com.qp->attr.is_terminate_local = 0;
 	return CPL_RET_BUF_DONE;

diff --git a/drivers/isdn/act2000/module.c b/drivers/isdn/act2000/module.c
@@ -442,7 +442,7 @@ act2000_sendbuf(act2000_card *card, int channel, int ack, struct sk_buff *skb)
 			return 0;
 		}
 		skb_reserve(xmit_skb, 19);
-		memcpy(skb_put(xmit_skb, len), skb->data, len);
+		skb_copy_from_linear_data(skb, skb_put(xmit_skb, len), len);
 	} else {
 		xmit_skb = skb_clone(skb, GFP_ATOMIC);
 		if (!xmit_skb) {

diff --git a/drivers/isdn/gigaset/usb-gigaset.c b/drivers/isdn/gigaset/usb-gigaset.c
@@ -652,7 +652,7 @@ static int write_modem(struct cardstate *cs)
 	 * transmit data
 	 */
 	count = min(bcs->tx_skb->len, (unsigned) ucs->bulk_out_size);
-	memcpy(ucs->bulk_out_buffer, bcs->tx_skb->data, count);
+	skb_copy_from_linear_data(bcs->tx_skb, ucs->bulk_out_buffer, count);
 	skb_pull(bcs->tx_skb, count);
 	atomic_set(&ucs->busy, 1);
 	gig_dbg(DEBUG_OUTPUT, "write_modem: send %d bytes", count);

diff --git a/drivers/isdn/hardware/avm/b1dma.c b/drivers/isdn/hardware/avm/b1dma.c
@@ -404,7 +404,8 @@ static void b1dma_dispatch_tx(avmcard *card)
 		printk(KERN_DEBUG "tx: put 0x%x len=%d\n", 
 		       skb->data[2], txlen);
 #endif
-		memcpy(dma->sendbuf.dmabuf, skb->data+2, skb->len-2);
+		skb_copy_from_linear_data_offset(skb, 2, dma->sendbuf.dmabuf,
+						 skb->len - 2);
 	}
 	txlen = (txlen + 3) & ~3;
 

diff --git a/drivers/isdn/hardware/avm/c4.c b/drivers/isdn/hardware/avm/c4.c
@@ -457,7 +457,8 @@ static void c4_dispatch_tx(avmcard *card)
 		printk(KERN_DEBUG "%s: tx put 0x%x len=%d\n",
 				card->name, skb->data[2], txlen);
 #endif
-		memcpy(dma->sendbuf.dmabuf, skb->data+2, skb->len-2);
+		skb_copy_from_linear_data_offset(skb, 2, dma->sendbuf.dmabuf,
+						 skb->len - 2);
 	}
 	txlen = (txlen + 3) & ~3;
 

diff --git a/drivers/isdn/hisax/elsa_ser.c b/drivers/isdn/hisax/elsa_ser.c
@@ -254,14 +254,16 @@ write_modem(struct BCState *bcs) {
 	count = len;
 	if (count > MAX_MODEM_BUF - fp) {
 		count = MAX_MODEM_BUF - fp;
-		memcpy(cs->hw.elsa.transbuf + fp, bcs->tx_skb->data, count);
+		skb_copy_from_linear_data(bcs->tx_skb,
+					  cs->hw.elsa.transbuf + fp, count);
 		skb_pull(bcs->tx_skb, count);
 		cs->hw.elsa.transcnt += count;
 		ret = count;
 		count = len - count;
 		fp = 0;
 	}
-	memcpy((cs->hw.elsa.transbuf + fp), bcs->tx_skb->data, count);
+	skb_copy_from_linear_data(bcs->tx_skb,
+				  cs->hw.elsa.transbuf + fp, count);
 	skb_pull(bcs->tx_skb, count);
 	cs->hw.elsa.transcnt += count;
 	ret += count;

diff --git a/drivers/isdn/hisax/isdnl2.c b/drivers/isdn/hisax/isdnl2.c
@@ -1293,7 +1293,8 @@ l2_pull_iqueue(struct FsmInst *fi, int event, void *arg)
 		oskb = skb;
 		skb = alloc_skb(oskb->len + i, GFP_ATOMIC);
 		memcpy(skb_put(skb, i), header, i);
-		memcpy(skb_put(skb, oskb->len), oskb->data, oskb->len);
+		skb_copy_from_linear_data(oskb,
+					  skb_put(skb, oskb->len), oskb->len);
 		dev_kfree_skb(oskb);
 	}
 	st->l2.l2l1(st, PH_PULL | INDICATION, skb);

diff --git a/drivers/isdn/hysdn/hycapi.c b/drivers/isdn/hysdn/hycapi.c
@@ -398,7 +398,7 @@ static u16 hycapi_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
 			_len = CAPIMSG_LEN(skb->data);
 			if (_len > 22) {
 				_len2 = _len - 22;
-				memcpy(msghead, skb->data, 22);
+				skb_copy_from_linear_data(skb, msghead, 22);
 				memcpy(skb->data + _len2, msghead, 22);
 				skb_pull(skb, _len2);
 				CAPIMSG_SETLEN(skb->data, 22);

diff --git a/drivers/isdn/hysdn/hysdn_sched.c b/drivers/isdn/hysdn/hysdn_sched.c
@@ -113,7 +113,8 @@ hysdn_sched_tx(hysdn_card *card, unsigned char *buf,
 	    (skb = hysdn_tx_netget(card)) != NULL) 
 	{
 		if (skb->len <= maxlen) {
-			memcpy(buf, skb->data, skb->len);	/* copy the packet to the buffer */
+			/* copy the packet to the buffer */
+			skb_copy_from_linear_data(skb, buf, skb->len);
 			*len = skb->len;
 			*chan = CHAN_NDIS_DATA;
 			card->net_tx_busy = 1;	/* we are busy sending network data */
@@ -126,7 +127,7 @@ hysdn_sched_tx(hysdn_card *card, unsigned char *buf,
 	    ((skb = hycapi_tx_capiget(card)) != NULL) )
 	{
 		if (skb->len <= maxlen) {
-			memcpy(buf, skb->data, skb->len);
+			skb_copy_from_linear_data(skb, buf, skb->len);
 			*len = skb->len;
 			*chan = CHAN_CAPI;
 			hycapi_tx_capiack(card);

diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
@@ -829,7 +829,7 @@ isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_que
 				dflag = 0;
 			}
 			count_put = count_pull;
-			memcpy(cp, skb->data, count_put);
+			skb_copy_from_linear_data(skb, cp, count_put);
 			cp += count_put;
 			len -= count_put;
 #ifdef CONFIG_ISDN_AUDIO

diff --git a/drivers/isdn/i4l/isdn_ppp.c b/drivers/isdn/i4l/isdn_ppp.c
@@ -1100,7 +1100,8 @@ isdn_ppp_push_higher(isdn_net_dev * net_dev, isdn_net_local * lp, struct sk_buff
 					goto drop_packet;
 				}
 				skb_put(skb, skb_old->len + 128);
-				memcpy(skb->data, skb_old->data, skb_old->len);
+				skb_copy_from_linear_data(skb_old, skb->data,
+							  skb_old->len);
 				if (net_dev->local->ppp_slot < 0) {
 					printk(KERN_ERR "%s: net_dev->local->ppp_slot(%d) out of range\n",
 						__FUNCTION__, net_dev->local->ppp_slot);
@@ -1902,7 +1903,9 @@ void isdn_ppp_mp_reassembly( isdn_net_dev * net_dev, isdn_net_local * lp,
 		while( from != to ) {
 			unsigned int len = from->len - MP_HEADER_LEN;
 
-			memcpy(skb_put(skb,len), from->data+MP_HEADER_LEN, len);
+			skb_copy_from_linear_data_offset(from, MP_HEADER_LEN,
+							 skb_put(skb,len),
+							 len);
 			frag = from->next;
 			isdn_ppp_mp_free_skb(mp, from);
 			from = frag; 

diff --git a/drivers/isdn/isdnloop/isdnloop.c b/drivers/isdn/isdnloop/isdnloop.c
@@ -415,7 +415,8 @@ isdnloop_sendbuf(int channel, struct sk_buff *skb, isdnloop_card * card)
 		spin_lock_irqsave(&card->isdnloop_lock, flags);
 		nskb = dev_alloc_skb(skb->len);
 		if (nskb) {
-			memcpy(skb_put(nskb, len), skb->data, len);
+			skb_copy_from_linear_data(skb,
+						  skb_put(nskb, len), len);
 			skb_queue_tail(&card->bqueue[channel], nskb);
 			dev_kfree_skb(skb);
 		} else

diff --git a/drivers/isdn/pcbit/capi.c b/drivers/isdn/pcbit/capi.c
@@ -429,8 +429,9 @@ int capi_decode_conn_ind(struct pcbit_chan * chan,
 		if (!(info->data.setup.CallingPN = kmalloc(len - count + 1, GFP_ATOMIC)))
 			return -1;
 
-		memcpy(info->data.setup.CallingPN, skb->data + count + 1, 
-		       len - count);
+		skb_copy_from_linear_data_offset(skb, count + 1,
+						 info->data.setup.CallingPN,
+						 len - count);
 		info->data.setup.CallingPN[len - count] = 0;
 
 	}
@@ -457,8 +458,9 @@ int capi_decode_conn_ind(struct pcbit_chan * chan,
 		if (!(info->data.setup.CalledPN = kmalloc(len - count + 1, GFP_ATOMIC)))
 			return -1;
 
-		memcpy(info->data.setup.CalledPN, skb->data + count + 1, 
-		       len - count); 
+		skb_copy_from_linear_data_offset(skb, count + 1,
+						 info->data.setup.CalledPN,
+						 len - count);
 		info->data.setup.CalledPN[len - count] = 0;
 
 	}
@@ -539,7 +541,7 @@ int capi_decode_conn_actv_ind(struct pcbit_chan * chan, struct sk_buff *skb)
 
 #ifdef DEBUG
 	if (len > 1 && len < 31) {
-		memcpy(str, skb->data + 2, len - 1);
+		skb_copy_from_linear_data_offset(skb, 2, str, len - 1);
 		str[len] = 0;
 		printk(KERN_DEBUG "Connected Party Number: %s\n", str);
 	}

diff --git a/drivers/media/dvb/dvb-core/dvb_net.c b/drivers/media/dvb/dvb-core/dvb_net.c
@@ -697,7 +697,9 @@ static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len )
 					}
 					else
 					{
-						memcpy(dest_addr,  priv->ule_skb->data, ETH_ALEN);
+						skb_copy_from_linear_data(priv->ule_skb,
+							      dest_addr,
+							      ETH_ALEN);
 						skb_pull(priv->ule_skb, ETH_ALEN);
 					}
 				}

diff --git a/drivers/message/fusion/mptlan.c b/drivers/message/fusion/mptlan.c
@@ -932,7 +932,7 @@ mpt_lan_receive_post_turbo(struct net_device *dev, u32 tmsg)
 		pci_dma_sync_single_for_cpu(mpt_dev->pcidev, priv->RcvCtl[ctx].dma,
 					    priv->RcvCtl[ctx].len, PCI_DMA_FROMDEVICE);
 
-		memcpy(skb_put(skb, len), old_skb->data, len);
+		skb_copy_from_linear_data(old_skb, skb_put(skb, len), len);
 
 		pci_dma_sync_single_for_device(mpt_dev->pcidev, priv->RcvCtl[ctx].dma,
 					       priv->RcvCtl[ctx].len, PCI_DMA_FROMDEVICE);
@@ -1093,7 +1093,7 @@ mpt_lan_receive_post_reply(struct net_device *dev,
 						    priv->RcvCtl[ctx].dma,
 						    priv->RcvCtl[ctx].len,
 						    PCI_DMA_FROMDEVICE);
-			memcpy(skb_put(skb, l), old_skb->data, l);
+			skb_copy_from_linear_data(old_skb, skb_put(skb, l), l);
 
 			pci_dma_sync_single_for_device(mpt_dev->pcidev,
 						       priv->RcvCtl[ctx].dma,
@@ -1122,7 +1122,7 @@ mpt_lan_receive_post_reply(struct net_device *dev,
 					    priv->RcvCtl[ctx].len,
 					    PCI_DMA_FROMDEVICE);
 
-		memcpy(skb_put(skb, len), old_skb->data, len);
+		skb_copy_from_linear_data(old_skb, skb_put(skb, len), len);
 
 		pci_dma_sync_single_for_device(mpt_dev->pcidev,
 					       priv->RcvCtl[ctx].dma,

diff --git a/drivers/net/3c505.c b/drivers/net/3c505.c
@@ -1025,7 +1025,7 @@ static int send_packet(struct net_device *dev, struct sk_buff *skb)
 	adapter->current_dma.start_time = jiffies;
 
 	if ((unsigned long)(skb->data + nlen) >= MAX_DMA_ADDRESS || nlen != skb->len) {
-		memcpy(adapter->dma_buffer, skb->data, nlen);
+		skb_copy_from_linear_data(skb, adapter->dma_buffer, nlen);
 		memset(adapter->dma_buffer+skb->len, 0, nlen-skb->len);
 		target = isa_virt_to_bus(adapter->dma_buffer);
 	}

diff --git a/drivers/net/3c523.c b/drivers/net/3c523.c
@@ -1145,7 +1145,7 @@ static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
 
 	if (len != skb->len)
 		memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
-	memcpy((char *) p->xmit_cbuffs[p->xmit_count], (char *) (skb->data), skb->len);
+	skb_copy_from_linear_data(skb, p->xmit_cbuffs[p->xmit_count], skb->len);
 
 #if (NUM_XMIT_BUFFS == 1)
 #ifdef NO_NOPCOMMANDS

diff --git a/drivers/net/7990.c b/drivers/net/7990.c
@@ -567,7 +567,7 @@ int lance_start_xmit (struct sk_buff *skb, struct net_device *dev)
 
     	if (skb->len < ETH_ZLEN)
     		memset((char *)&ib->tx_buf[entry][0], 0, ETH_ZLEN);
-        memcpy ((char *)&ib->tx_buf [entry][0], skb->data, skblen);
+        skb_copy_from_linear_data(skb, &ib->tx_buf[entry][0], skblen);
 
         /* Now, give the packet to the lance */
         ib->btx_ring [entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);

diff --git a/drivers/net/a2065.c b/drivers/net/a2065.c
@@ -598,7 +598,7 @@ static int lance_start_xmit (struct sk_buff *skb, struct net_device *dev)
 	ib->btx_ring [entry].length = (-len) | 0xf000;
 	ib->btx_ring [entry].misc = 0;
 
-	memcpy ((char *)&ib->tx_buf [entry][0], skb->data, skblen);
+	skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
 
 	/* Clear the slack of the packet, do I need this? */
 	if (len != skblen)

diff --git a/drivers/net/arcnet/capmode.c b/drivers/net/arcnet/capmode.c
@@ -273,7 +273,8 @@ static int ack_tx(struct net_device *dev, int acked)
   /* skb_pull(ackskb, ARC_HDR_SIZE); */
 
 
-  memcpy(ackpkt, lp->outgoing.skb->data, ARC_HDR_SIZE+sizeof(struct arc_cap));
+  skb_copy_from_linear_data(lp->outgoing.skb, ackpkt,
+		ARC_HDR_SIZE + sizeof(struct arc_cap));
   ackpkt->soft.cap.proto=0; /* using protocol 0 for acknowledge */
   ackpkt->soft.cap.mes.ack=acked;
 

diff --git a/drivers/net/atari_bionet.c b/drivers/net/atari_bionet.c
@@ -453,7 +453,8 @@ bionet_send_packet(struct sk_buff *skb, struct net_device *dev) {
 		stdma_lock(bionet_intr, NULL);
 		local_irq_restore(flags);
 		if( !STRAM_ADDR(buf+length-1) ) {
-			memcpy(nic_packet->buffer, skb->data, length);
+			skb_copy_from_linear_data(skb, nic_packet->buffer,
+						  length);
 			buf = (unsigned long)&((struct nic_pkt_s *)phys_nic_packet)->buffer;
 		}