--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1234,6 +1234,7 @@ EXPORT_SYMBOL_GPL(usbnet_tx_timeout);
 
 /*-------------------------------------------------------------------------*/
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,35,0)
 static int build_dma_sg(const struct sk_buff *skb, struct urb *urb)
 {
 	unsigned num_sgs, total_len = 0;
@@ -1264,6 +1265,12 @@ static int build_dma_sg(const struct sk_
 
 	return 1;
 }
+#else
+static int build_dma_sg(const struct sk_buff *skb, struct urb *urb)
+{
+	return -ENXIO;
+}
+#endif
 
 netdev_tx_t usbnet_start_xmit (struct sk_buff *skb,
 				     struct net_device *net)
@@ -1377,7 +1384,9 @@ not_drop:
 		if (skb)
 			dev_kfree_skb_any (skb);
 		if (urb) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,35,0)
 			kfree(urb->sg);
+#endif
 			usb_free_urb(urb);
 		}
 	} else
@@ -1430,7 +1439,9 @@ static void usbnet_bh (unsigned long par
 			rx_process (dev, skb);
 			continue;
 		case tx_done:
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,35,0)
 			kfree(entry->urb->sg);
+#endif
 		case rx_cleanup:
 			usb_free_urb (entry->urb);
 			dev_kfree_skb (skb);
@@ -1767,7 +1778,9 @@ int usbnet_resume (struct usb_interface
 			retval = usb_submit_urb(res, GFP_ATOMIC);
 			if (retval < 0) {
 				dev_kfree_skb_any(skb);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,35,0)
 				kfree(res->sg);
+#endif
 				usb_free_urb(res);
 				usb_autopm_put_interface_async(dev->intf);
 			} else {