Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6

9 files changed, 491 insertions, 422 deletions

diff --git a/net/core/datagram.c b/net/core/datagram.c
index e2a36f0..58abee1 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -282,6 +282,7 @@ int skb_copy_datagram_iovec(const struct sk_buff *skb, int offset,
 {
 	int start = skb_headlen(skb);
 	int i, copy = start - offset;
+	struct sk_buff *frag_iter;
 
 	/* Copy header. */
 	if (copy > 0) {
@@ -322,28 +323,24 @@ int skb_copy_datagram_iovec(const struct sk_buff *skb, int offset,
 		start = end;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
-
-		for (; list; list = list->next) {
-			int end;
-
-			WARN_ON(start > offset + len);
-
-			end = start + list->len;
-			if ((copy = end - offset) > 0) {
-				if (copy > len)
-					copy = len;
-				if (skb_copy_datagram_iovec(list,
-							    offset - start,
-							    to, copy))
-					goto fault;
-				if ((len -= copy) == 0)
-					return 0;
-				offset += copy;
-			}
-			start = end;
+	skb_walk_frags(skb, frag_iter) {
+		int end;
+
+		WARN_ON(start > offset + len);
+
+		end = start + frag_iter->len;
+		if ((copy = end - offset) > 0) {
+			if (copy > len)
+				copy = len;
+			if (skb_copy_datagram_iovec(frag_iter,
+						    offset - start,
+						    to, copy))
+				goto fault;
+			if ((len -= copy) == 0)
+				return 0;
+			offset += copy;
 		}
+		start = end;
 	}
 	if (!len)
 		return 0;
@@ -369,6 +366,7 @@ int skb_copy_datagram_const_iovec(const struct sk_buff *skb, int offset,
 {
 	int start = skb_headlen(skb);
 	int i, copy = start - offset;
+	struct sk_buff *frag_iter;
 
 	/* Copy header. */
 	if (copy > 0) {
@@ -411,30 +409,26 @@ int skb_copy_datagram_const_iovec(const struct sk_buff *skb, int offset,
 		start = end;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
-
-		for (; list; list = list->next) {
-			int end;
-
-			WARN_ON(start > offset + len);
-
-			end = start + list->len;
-			if ((copy = end - offset) > 0) {
-				if (copy > len)
-					copy = len;
-				if (skb_copy_datagram_const_iovec(list,
-							    offset - start,
-							    to, to_offset,
-							    copy))
-					goto fault;
-				if ((len -= copy) == 0)
-					return 0;
-				offset += copy;
-				to_offset += copy;
-			}
-			start = end;
+	skb_walk_frags(skb, frag_iter) {
+		int end;
+
+		WARN_ON(start > offset + len);
+
+		end = start + frag_iter->len;
+		if ((copy = end - offset) > 0) {
+			if (copy > len)
+				copy = len;
+			if (skb_copy_datagram_const_iovec(frag_iter,
+							  offset - start,
+							  to, to_offset,
+							  copy))
+				goto fault;
+			if ((len -= copy) == 0)
+				return 0;
+			offset += copy;
+			to_offset += copy;
 		}
+		start = end;
 	}
 	if (!len)
 		return 0;
@@ -461,12 +455,14 @@ int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset,
 {
 	int start = skb_headlen(skb);
 	int i, copy = start - offset;
+	struct sk_buff *frag_iter;
 
 	/* Copy header. */
 	if (copy > 0) {
 		if (copy > len)
 			copy = len;
-		if (memcpy_fromiovecend(skb->data + offset, from, 0, copy))
+		if (memcpy_fromiovecend(skb->data + offset, from, from_offset,
+					copy))
 			goto fault;
 		if ((len -= copy) == 0)
 			return 0;
@@ -505,31 +501,27 @@ int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset,
 		start = end;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
-
-		for (; list; list = list->next) {
-			int end;
-
-			WARN_ON(start > offset + len);
-
-			end = start + list->len;
-			if ((copy = end - offset) > 0) {
-				if (copy > len)
-					copy = len;
-				if (skb_copy_datagram_from_iovec(list,
-								 offset - start,
-								 from,
-								 from_offset,
-								 copy))
-					goto fault;
-				if ((len -= copy) == 0)
-					return 0;
-				offset += copy;
-				from_offset += copy;
-			}
-			start = end;
+	skb_walk_frags(skb, frag_iter) {
+		int end;
+
+		WARN_ON(start > offset + len);
+
+		end = start + frag_iter->len;
+		if ((copy = end - offset) > 0) {
+			if (copy > len)
+				copy = len;
+			if (skb_copy_datagram_from_iovec(frag_iter,
+							 offset - start,
+							 from,
+							 from_offset,
+							 copy))
+				goto fault;
+			if ((len -= copy) == 0)
+				return 0;
+			offset += copy;
+			from_offset += copy;
 		}
+		start = end;
 	}
 	if (!len)
 		return 0;
@@ -544,8 +536,9 @@ static int skb_copy_and_csum_datagram(const struct sk_buff *skb, int offset,
 				      __wsum *csump)
 {
 	int start = skb_headlen(skb);
-	int pos = 0;
 	int i, copy = start - offset;
+	struct sk_buff *frag_iter;
+	int pos = 0;
 
 	/* Copy header. */
 	if (copy > 0) {
@@ -596,33 +589,29 @@ static int skb_copy_and_csum_datagram(const struct sk_buff *skb, int offset,
 		start = end;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
-
-		for (; list; list=list->next) {
-			int end;
-
-			WARN_ON(start > offset + len);
-
-			end = start + list->len;
-			if ((copy = end - offset) > 0) {
-				__wsum csum2 = 0;
-				if (copy > len)
-					copy = len;
-				if (skb_copy_and_csum_datagram(list,
-							       offset - start,
-							       to, copy,
-							       &csum2))
-					goto fault;
-				*csump = csum_block_add(*csump, csum2, pos);
-				if ((len -= copy) == 0)
-					return 0;
-				offset += copy;
-				to += copy;
-				pos += copy;
-			}
-			start = end;
+	skb_walk_frags(skb, frag_iter) {
+		int end;
+
+		WARN_ON(start > offset + len);
+
+		end = start + frag_iter->len;
+		if ((copy = end - offset) > 0) {
+			__wsum csum2 = 0;
+			if (copy > len)
+				copy = len;
+			if (skb_copy_and_csum_datagram(frag_iter,
+						       offset - start,
+						       to, copy,
+						       &csum2))
+				goto fault;
+			*csump = csum_block_add(*csump, csum2, pos);
+			if ((len -= copy) == 0)
+				return 0;
+			offset += copy;
+			to += copy;
+			pos += copy;
 		}
+		start = end;
 	}
 	if (!len)
 		return 0;
diff --git a/net/core/dev.c b/net/core/dev.c
index ed4550f..11560e3 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -269,7 +269,8 @@ static const unsigned short netdev_lock_type[] =
 	 ARPHRD_IRDA, ARPHRD_FCPP, ARPHRD_FCAL, ARPHRD_FCPL,
 	 ARPHRD_FCFABRIC, ARPHRD_IEEE802_TR, ARPHRD_IEEE80211,
 	 ARPHRD_IEEE80211_PRISM, ARPHRD_IEEE80211_RADIOTAP, ARPHRD_PHONET,
-	 ARPHRD_PHONET_PIPE, ARPHRD_VOID, ARPHRD_NONE};
+	 ARPHRD_PHONET_PIPE, ARPHRD_IEEE802154, ARPHRD_IEEE802154_PHY,
+	 ARPHRD_VOID, ARPHRD_NONE};
 
 static const char *netdev_lock_name[] =
 	{"_xmit_NETROM", "_xmit_ETHER", "_xmit_EETHER", "_xmit_AX25",
@@ -286,7 +287,8 @@ static const char *netdev_lock_name[] =
 	 "_xmit_IRDA", "_xmit_FCPP", "_xmit_FCAL", "_xmit_FCPL",
 	 "_xmit_FCFABRIC", "_xmit_IEEE802_TR", "_xmit_IEEE80211",
 	 "_xmit_IEEE80211_PRISM", "_xmit_IEEE80211_RADIOTAP", "_xmit_PHONET",
-	 "_xmit_PHONET_PIPE", "_xmit_VOID", "_xmit_NONE"};
+	 "_xmit_PHONET_PIPE", "_xmit_IEEE802154", "_xmit_IEEE802154_PHY",
+	 "_xmit_VOID", "_xmit_NONE"};
 
 static struct lock_class_key netdev_xmit_lock_key[ARRAY_SIZE(netdev_lock_type)];
 static struct lock_class_key netdev_addr_lock_key[ARRAY_SIZE(netdev_lock_type)];
@@ -1048,7 +1050,7 @@ void dev_load(struct net *net, const char *name)
 int dev_open(struct net_device *dev)
 {
 	const struct net_device_ops *ops = dev->netdev_ops;
-	int ret = 0;
+	int ret;
 
 	ASSERT_RTNL();
 
@@ -1065,6 +1067,11 @@ int dev_open(struct net_device *dev)
 	if (!netif_device_present(dev))
 		return -ENODEV;
 
+	ret = call_netdevice_notifiers(NETDEV_PRE_UP, dev);
+	ret = notifier_to_errno(ret);
+	if (ret)
+		return ret;
+
 	/*
 	 *	Call device private open method
 	 */
@@ -1693,10 +1700,9 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
 		 * If device doesnt need skb->dst, release it right now while
 		 * its hot in this cpu cache
 		 */
-		if ((dev->priv_flags & IFF_XMIT_DST_RELEASE) && skb->dst) {
-			dst_release(skb->dst);
-			skb->dst = NULL;
-		}
+		if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
+			skb_dst_drop(skb);
+
 		rc = ops->ndo_start_xmit(skb, dev);
 		if (rc == 0)
 			txq_trans_update(txq);
@@ -1816,7 +1822,7 @@ int dev_queue_xmit(struct sk_buff *skb)
 	if (netif_needs_gso(dev, skb))
 		goto gso;
 
-	if (skb_shinfo(skb)->frag_list &&
+	if (skb_has_frags(skb) &&
 	    !(dev->features & NETIF_F_FRAGLIST) &&
 	    __skb_linearize(skb))
 		goto out_kfree_skb;
@@ -2403,7 +2409,7 @@ int dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 	if (!(skb->dev->features & NETIF_F_GRO))
 		goto normal;
 
-	if (skb_is_gso(skb) || skb_shinfo(skb)->frag_list)
+	if (skb_is_gso(skb) || skb_has_frags(skb))
 		goto normal;
 
 	rcu_read_lock();
@@ -3473,8 +3479,9 @@ void dev_set_rx_mode(struct net_device *dev)
 
 /* hw addresses list handling functions */
 
-static int __hw_addr_add(struct list_head *list, unsigned char *addr,
-			 int addr_len, unsigned char addr_type)
+static int __hw_addr_add(struct list_head *list, int *delta,
+			 unsigned char *addr, int addr_len,
+			 unsigned char addr_type)
 {
 	struct netdev_hw_addr *ha;
 	int alloc_size;
@@ -3482,6 +3489,15 @@ static int __hw_addr_add(struct list_head *list, unsigned char *addr,
 	if (addr_len > MAX_ADDR_LEN)
 		return -EINVAL;
 
+	list_for_each_entry(ha, list, list) {
+		if (!memcmp(ha->addr, addr, addr_len) &&
+		    ha->type == addr_type) {
+			ha->refcount++;
+			return 0;
+		}
+	}
+
+
 	alloc_size = sizeof(*ha);
 	if (alloc_size < L1_CACHE_BYTES)
 		alloc_size = L1_CACHE_BYTES;
@@ -3490,7 +3506,11 @@ static int __hw_addr_add(struct list_head *list, unsigned char *addr,
 		return -ENOMEM;
 	memcpy(ha->addr, addr, addr_len);
 	ha->type = addr_type;
+	ha->refcount = 1;
+	ha->synced = false;
 	list_add_tail_rcu(&ha->list, list);
+	if (delta)
+		(*delta)++;
 	return 0;
 }
 
@@ -3502,29 +3522,30 @@ static void ha_rcu_free(struct rcu_head *head)
 	kfree(ha);
 }
 
-static int __hw_addr_del_ii(struct list_head *list, unsigned char *addr,
-			    int addr_len, unsigned char addr_type,
-			    int ignore_index)
+static int __hw_addr_del(struct list_head *list, int *delta,
+			 unsigned char *addr, int addr_len,
+			 unsigned char addr_type)
 {
 	struct netdev_hw_addr *ha;
-	int i = 0;
 
 	list_for_each_entry(ha, list, list) {
-		if (i++ != ignore_index &&
-		    !memcmp(ha->addr, addr, addr_len) &&
+		if (!memcmp(ha->addr, addr, addr_len) &&
 		    (ha->type == addr_type || !addr_type)) {
+			if (--ha->refcount)
+				return 0;
 			list_del_rcu(&ha->list);
 			call_rcu(&ha->rcu_head, ha_rcu_free);
+			if (delta)
+				(*delta)--;
 			return 0;
 		}
 	}
 	return -ENOENT;
 }
 
-static int __hw_addr_add_multiple_ii(struct list_head *to_list,
-				     struct list_head *from_list,
-				     int addr_len, unsigned char addr_type,
-				     int ignore_index)
+static int __hw_addr_add_multiple(struct list_head *to_list, int *to_delta,
+				  struct list_head *from_list, int addr_len,
+				  unsigned char addr_type)
 {
 	int err;
 	struct netdev_hw_addr *ha, *ha2;
@@ -3532,7 +3553,8 @@ static int __hw_addr_add_multiple_ii(struct list_head *to_list,
 
 	list_for_each_entry(ha, from_list, list) {
 		type = addr_type ? addr_type : ha->type;
-		err = __hw_addr_add(to_list, ha->addr, addr_len, type);
+		err = __hw_addr_add(to_list, to_delta, ha->addr,
+				    addr_len, type);
 		if (err)
 			goto unroll;
 	}
@@ -3543,27 +3565,69 @@ unroll:
 		if (ha2 == ha)
 			break;
 		type = addr_type ? addr_type : ha2->type;
-		__hw_addr_del_ii(to_list, ha2->addr, addr_len, type,
-				 ignore_index);
+		__hw_addr_del(to_list, to_delta, ha2->addr,
+			      addr_len, type);
 	}
 	return err;
 }
 
-static void __hw_addr_del_multiple_ii(struct list_head *to_list,
-				      struct list_head *from_list,
-				      int addr_len, unsigned char addr_type,
-				      int ignore_index)
+static void __hw_addr_del_multiple(struct list_head *to_list, int *to_delta,
+				   struct list_head *from_list, int addr_len,
+				   unsigned char addr_type)
 {
 	struct netdev_hw_addr *ha;
 	unsigned char type;
 
 	list_for_each_entry(ha, from_list, list) {
 		type = addr_type ? addr_type : ha->type;
-		__hw_addr_del_ii(to_list, ha->addr, addr_len, addr_type,
-				 ignore_index);
+		__hw_addr_del(to_list, to_delta, ha->addr,
+			      addr_len, addr_type);
+	}
+}
+
+static int __hw_addr_sync(struct list_head *to_list, int *to_delta,
+			  struct list_head *from_list, int *from_delta,
+			  int addr_len)
+{
+	int err = 0;
+	struct netdev_hw_addr *ha, *tmp;
+
+	list_for_each_entry_safe(ha, tmp, from_list, list) {
+		if (!ha->synced) {
+			err = __hw_addr_add(to_list, to_delta, ha->addr,
+					    addr_len, ha->type);
+			if (err)
+				break;
+			ha->synced = true;
+			ha->refcount++;
+		} else if (ha->refcount == 1) {
+			__hw_addr_del(to_list, to_delta, ha->addr,
+				      addr_len, ha->type);
+			__hw_addr_del(from_list, from_delta, ha->addr,
+				      addr_len, ha->type);
+		}
+	}
+	return err;
+}
+
+static void __hw_addr_unsync(struct list_head *to_list, int *to_delta,
+			     struct list_head *from_list, int *from_delta,
+			     int addr_len)
+{
+	struct netdev_hw_addr *ha, *tmp;
+
+	list_for_each_entry_safe(ha, tmp, from_list, list) {
+		if (ha->synced) {
+			__hw_addr_del(to_list, to_delta, ha->addr,
+				      addr_len, ha->type);
+			ha->synced = false;
+			__hw_addr_del(from_list, from_delta, ha->addr,
+				      addr_len, ha->type);
+		}
 	}
 }
 
+
 static void __hw_addr_flush(struct list_head *list)
 {
 	struct netdev_hw_addr *ha, *tmp;
@@ -3593,8 +3657,8 @@ static int dev_addr_init(struct net_device *dev)
 	/* rtnl_mutex must be held here */
 
 	INIT_LIST_HEAD(&dev->dev_addr_list);
-	memset(addr, 0, sizeof(*addr));
-	err = __hw_addr_add(&dev->dev_addr_list, addr, sizeof(*addr),
+	memset(addr, 0, sizeof(addr));
+	err = __hw_addr_add(&dev->dev_addr_list, NULL, addr, sizeof(addr),
 			    NETDEV_HW_ADDR_T_LAN);
 	if (!err) {
 		/*
@@ -3626,7 +3690,7 @@ int dev_addr_add(struct net_device *dev, unsigned char *addr,
 
 	ASSERT_RTNL();
 
-	err = __hw_addr_add(&dev->dev_addr_list, addr, dev->addr_len,
+	err = __hw_addr_add(&dev->dev_addr_list, NULL, addr, dev->addr_len,
 			    addr_type);
 	if (!err)
 		call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
@@ -3649,11 +3713,20 @@ int dev_addr_del(struct net_device *dev, unsigned char *addr,
 		 unsigned char addr_type)
 {
 	int err;
+	struct netdev_hw_addr *ha;
 
 	ASSERT_RTNL();
 
-	err = __hw_addr_del_ii(&dev->dev_addr_list, addr, dev->addr_len,
-			       addr_type, 0);
+	/*
+	 * We can not remove the first address from the list because
+	 * dev->dev_addr points to that.
+	 */
+	ha = list_first_entry(&dev->dev_addr_list, struct netdev_hw_addr, list);
+	if (ha->addr == dev->dev_addr && ha->refcount == 1)
+		return -ENOENT;
+
+	err = __hw_addr_del(&dev->dev_addr_list, NULL, addr, dev->addr_len,
+			    addr_type);
 	if (!err)
 		call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
 	return err;
@@ -3680,9 +3753,9 @@ int dev_addr_add_multiple(struct net_device *to_dev,
 
 	if (from_dev->addr_len != to_dev->addr_len)
 		return -EINVAL;
-	err = __hw_addr_add_multiple_ii(&to_dev->dev_addr_list,
-					&from_dev->dev_addr_list,
-					to_dev->addr_len, addr_type, 0);
+	err = __hw_addr_add_multiple(&to_dev->dev_addr_list, NULL,
+				     &from_dev->dev_addr_list,
+				     to_dev->addr_len, addr_type);
 	if (!err)
 		call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev);
 	return err;
@@ -3707,9 +3780,9 @@ int dev_addr_del_multiple(struct net_device *to_dev,
 
 	if (from_dev->addr_len != to_dev->addr_len)
 		return -EINVAL;
-	__hw_addr_del_multiple_ii(&to_dev->dev_addr_list,
-				  &from_dev->dev_addr_list,
-				  to_dev->addr_len, addr_type, 0);
+	__hw_addr_del_multiple(&to_dev->dev_addr_list, NULL,
+			       &from_dev->dev_addr_list,
+			       to_dev->addr_len, addr_type);
 	call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev);
 	return 0;
 }
@@ -3779,24 +3852,22 @@ int __dev_addr_add(struct dev_addr_list **list, int *count,
  *	dev_unicast_delete	- Release secondary unicast address.
  *	@dev: device
  *	@addr: address to delete
- *	@alen: length of @addr
  *
  *	Release reference to a secondary unicast address and remove it
  *	from the device if the reference count drops to zero.
  *
  * 	The caller must hold the rtnl_mutex.
  */
-int dev_unicast_delete(struct net_device *dev, void *addr, int alen)
+int dev_unicast_delete(struct net_device *dev, void *addr)
 {
 	int err;
 
 	ASSERT_RTNL();
 
-	netif_addr_lock_bh(dev);
-	err = __dev_addr_delete(&dev->uc_list, &dev->uc_count, addr, alen, 0);
+	err = __hw_addr_del(&dev->uc_list, &dev->uc_count, addr,
+			    dev->addr_len, NETDEV_HW_ADDR_T_UNICAST);
 	if (!err)
 		__dev_set_rx_mode(dev);
-	netif_addr_unlock_bh(dev);
 	return err;
 }
 EXPORT_SYMBOL(dev_unicast_delete);
@@ -3805,24 +3876,22 @@ EXPORT_SYMBOL(dev_unicast_delete);
  *	dev_unicast_add		- add a secondary unicast address
  *	@dev: device
  *	@addr: address to add
- *	@alen: length of @addr
  *
  *	Add a secondary unicast address to the device or increase
  *	the reference count if it already exists.
  *
  *	The caller must hold the rtnl_mutex.
  */
-int dev_unicast_add(struct net_device *dev, void *addr, int alen)
+int dev_unicast_add(struct net_device *dev, void *addr)
 {
 	int err;
 
 	ASSERT_RTNL();
 
-	netif_addr_lock_bh(dev);
-	err = __dev_addr_add(&dev->uc_list, &dev->uc_count, addr, alen, 0);
+	err = __hw_addr_add(&dev->uc_list, &dev->uc_count, addr,
+			    dev->addr_len, NETDEV_HW_ADDR_T_UNICAST);
 	if (!err)
 		__dev_set_rx_mode(dev);
-	netif_addr_unlock_bh(dev);
 	return err;
 }
 EXPORT_SYMBOL(dev_unicast_add);
@@ -3879,8 +3948,7 @@ void __dev_addr_unsync(struct dev_addr_list **to, int *to_count,
  *	@from: source device
  *
  *	Add newly added addresses to the destination device and release
- *	addresses that have no users left. The source device must be
- *	locked by netif_tx_lock_bh.
+ *	addresses that have no users left.
  *
  *	This function is intended to be called from the dev->set_rx_mode
  *	function of layered software devices.
@@ -3889,12 +3957,15 @@ int dev_unicast_sync(struct net_device *to, struct net_device *from)
 {
 	int err = 0;
 
-	netif_addr_lock_bh(to);
-	err = __dev_addr_sync(&to->uc_list, &to->uc_count,
-			      &from->uc_list, &from->uc_count);
+	ASSERT_RTNL();
+
+	if (to->addr_len != from->addr_len)
+		return -EINVAL;
+
+	err = __hw_addr_sync(&to->uc_list, &to->uc_count,
+			     &from->uc_list, &from->uc_count, to->addr_len);
 	if (!err)
 		__dev_set_rx_mode(to);
-	netif_addr_unlock_bh(to);
 	return err;
 }
 EXPORT_SYMBOL(dev_unicast_sync);
@@ -3910,18 +3981,33 @@ EXPORT_SYMBOL(dev_unicast_sync);
  */
 void dev_unicast_unsync(struct net_device *to, struct net_device *from)
 {
-	netif_addr_lock_bh(from);
-	netif_addr_lock(to);
+	ASSERT_RTNL();
 
-	__dev_addr_unsync(&to->uc_list, &to->uc_count,
-			  &from->uc_list, &from->uc_count);
-	__dev_set_rx_mode(to);
+	if (to->addr_len != from->addr_len)
+		return;
 
-	netif_addr_unlock(to);
-	netif_addr_unlock_bh(from);
+	__hw_addr_unsync(&to->uc_list, &to->uc_count,
+			 &from->uc_list, &from->uc_count, to->addr_len);
+	__dev_set_rx_mode(to);
 }
 EXPORT_SYMBOL(dev_unicast_unsync);
 
+static void dev_unicast_flush(struct net_device *dev)
+{
+	/* rtnl_mutex must be held here */
+
+	__hw_addr_flush(&dev->uc_list);
+	dev->uc_count = 0;
+}
+
+static void dev_unicast_init(struct net_device *dev)
+{
+	/* rtnl_mutex must be held here */
+
+	INIT_LIST_HEAD(&dev->uc_list);
+}
+
+
 static void __dev_addr_discard(struct dev_addr_list **list)
 {
 	struct dev_addr_list *tmp;
@@ -3940,9 +4026,6 @@ static void dev_addr_discard(struct net_device *dev)
 {
 	netif_addr_lock_bh(dev);
 
-	__dev_addr_discard(&dev->uc_list);
-	dev->uc_count = 0;
-
 	__dev_addr_discard(&dev->mc_list);
 	dev->mc_count = 0;
 
@@ -4535,6 +4618,7 @@ static void rollback_registered(struct net_device *dev)
 	/*
 	 *	Flush the unicast and multicast chains
 	 */
+	dev_unicast_flush(dev);
 	dev_addr_discard(dev);
 
 	if (dev->netdev_ops->ndo_uninit)
@@ -4988,18 +5072,18 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
 	struct netdev_queue *tx;
 	struct net_device *dev;
 	size_t alloc_size;
-	void *p;
+	struct net_device *p;
 
 	BUG_ON(strlen(name) >= sizeof(dev->name));
 
 	alloc_size = sizeof(struct net_device);
 	if (sizeof_priv) {
 		/* ensure 32-byte alignment of private area */
-		alloc_size = (alloc_size + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST;
+		alloc_size = ALIGN(alloc_size, NETDEV_ALIGN);
 		alloc_size += sizeof_priv;
 	}
 	/* ensure 32-byte alignment of whole construct */
-	alloc_size += NETDEV_ALIGN_CONST;
+	alloc_size += NETDEV_ALIGN - 1;
 
 	p = kzalloc(alloc_size, GFP_KERNEL);
 	if (!p) {
@@ -5014,13 +5098,14 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
 		goto free_p;
 	}
 
-	dev = (struct net_device *)
-		(((long)p + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
+	dev = PTR_ALIGN(p, NETDEV_ALIGN);
 	dev->padded = (char *)dev - (char *)p;
 
 	if (dev_addr_init(dev))
 		goto free_tx;
 
+	dev_unicast_init(dev);
+
 	dev_net_set(dev, &init_net);
 
 	dev->_tx = tx;
@@ -5224,6 +5309,7 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
 	/*
 	 *	Flush the unicast and multicast chains
 	 */
+	dev_unicast_flush(dev);
 	dev_addr_discard(dev);
 
 	netdev_unregister_kobject(dev);
diff --git a/net/core/iovec.c b/net/core/iovec.c
index 40a76ce..16ad45d 100644
--- a/net/core/iovec.c
+++ b/net/core/iovec.c
@@ -112,9 +112,9 @@ int memcpy_toiovecend(const struct iovec *iov, unsigned char *kdata,
 			continue;
 		}
 		copy = min_t(unsigned int, iov->iov_len - offset, len);
-		offset = 0;
-		if (copy_to_user(iov->iov_base, kdata, copy))
+		if (copy_to_user(iov->iov_base + offset, kdata, copy))
 			return -EFAULT;
+		offset = 0;
 		kdata += copy;
 		len -= copy;
 	}
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index a1cbce7..163b4f5 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -771,6 +771,28 @@ static __inline__ int neigh_max_probes(struct neighbour *n)
 		p->ucast_probes + p->app_probes + p->mcast_probes);
 }
 
+static void neigh_invalidate(struct neighbour *neigh)
+{
+	struct sk_buff *skb;
+
+	NEIGH_CACHE_STAT_INC(neigh->tbl, res_failed);
+	NEIGH_PRINTK2("neigh %p is failed.\n", neigh);
+	neigh->updated = jiffies;
+
+	/* It is very thin place. report_unreachable is very complicated
+	   routine. Particularly, it can hit the same neighbour entry!
+
+	   So that, we try to be accurate and avoid dead loop. --ANK
+	 */
+	while (neigh->nud_state == NUD_FAILED &&
+	       (skb = __skb_dequeue(&neigh->arp_queue)) != NULL) {
+		write_unlock(&neigh->lock);
+		neigh->ops->error_report(neigh, skb);
+		write_lock(&neigh->lock);
+	}
+	skb_queue_purge(&neigh->arp_queue);
+}
+
 /* Called when a timer expires for a neighbour entry. */
 
 static void neigh_timer_handler(unsigned long arg)
@@ -835,26 +857,9 @@ static void neigh_timer_handler(unsigned long arg)
 
 	if ((neigh->nud_state & (NUD_INCOMPLETE | NUD_PROBE)) &&
 	    atomic_read(&neigh->probes) >= neigh_max_probes(neigh)) {
-		struct sk_buff *skb;
-
 		neigh->nud_state = NUD_FAILED;
-		neigh->updated = jiffies;
 		notify = 1;
-		NEIGH_CACHE_STAT_INC(neigh->tbl, res_failed);
-		NEIGH_PRINTK2("neigh %p is failed.\n", neigh);
-
-		/* It is very thin place. report_unreachable is very complicated
-		   routine. Particularly, it can hit the same neighbour entry!
-
-		   So that, we try to be accurate and avoid dead loop. --ANK
-		 */
-		while (neigh->nud_state == NUD_FAILED &&
-		       (skb = __skb_dequeue(&neigh->arp_queue)) != NULL) {
-			write_unlock(&neigh->lock);
-			neigh->ops->error_report(neigh, skb);
-			write_lock(&neigh->lock);
-		}
-		skb_queue_purge(&neigh->arp_queue);
+		neigh_invalidate(neigh);
 	}
 
 	if (neigh->nud_state & NUD_IN_TIMER) {
@@ -1001,6 +1006,11 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
 		neigh->nud_state = new;
 		err = 0;
 		notify = old & NUD_VALID;
+		if ((old & (NUD_INCOMPLETE | NUD_PROBE)) &&
+		    (new & NUD_FAILED)) {
+			neigh_invalidate(neigh);
+			notify = 1;
+		}
 		goto out;
 	}
 
@@ -1088,8 +1098,8 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
 			struct neighbour *n1 = neigh;
 			write_unlock_bh(&neigh->lock);
 			/* On shaper/eql skb->dst->neighbour != neigh :( */
-			if (skb->dst && skb->dst->neighbour)
-				n1 = skb->dst->neighbour;
+			if (skb_dst(skb) && skb_dst(skb)->neighbour)
+				n1 = skb_dst(skb)->neighbour;
 			n1->output(skb);
 			write_lock_bh(&neigh->lock);
 		}
@@ -1182,7 +1192,7 @@ EXPORT_SYMBOL(neigh_compat_output);
 
 int neigh_resolve_output(struct sk_buff *skb)
 {
-	struct dst_entry *dst = skb->dst;
+	struct dst_entry *dst = skb_dst(skb);
 	struct neighbour *neigh;
 	int rc = 0;
 
@@ -1229,7 +1239,7 @@ EXPORT_SYMBOL(neigh_resolve_output);
 int neigh_connected_output(struct sk_buff *skb)
 {
 	int err;
-	struct dst_entry *dst = skb->dst;
+	struct dst_entry *dst = skb_dst(skb);
 	struct neighbour *neigh = dst->neighbour;
 	struct net_device *dev = neigh->dev;
 
@@ -1298,8 +1308,7 @@ void pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
 		if (time_before(tbl->proxy_timer.expires, sched_next))
 			sched_next = tbl->proxy_timer.expires;
 	}
-	dst_release(skb->dst);
-	skb->dst = NULL;
+	skb_dst_drop(skb);
 	dev_hold(skb->dev);
 	__skb_queue_tail(&tbl->proxy_queue, skb);
 	mod_timer(&tbl->proxy_timer, sched_next);
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index b8ccd3c..19b8c20 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3691,8 +3691,7 @@ out1:
 #ifdef CONFIG_XFRM
 	free_SAs(pkt_dev);
 #endif
-	if (pkt_dev->flows)
-		vfree(pkt_dev->flows);
+	vfree(pkt_dev->flows);
 	kfree(pkt_dev);
 	return err;
 }
@@ -3791,8 +3790,7 @@ static int pktgen_remove_device(struct pktgen_thread *t,
 #ifdef CONFIG_XFRM
 	free_SAs(pkt_dev);
 #endif
-	if (pkt_dev->flows)
-		vfree(pkt_dev->flows);
+	vfree(pkt_dev->flows);
 	kfree(pkt_dev);
 	return 0;
 }
diff --git a/net/core/skb_dma_map.c b/net/core/skb_dma_map.c
index 8623492..79687df 100644
--- a/net/core/skb_dma_map.c
+++ b/net/core/skb_dma_map.c
@@ -20,7 +20,7 @@ int skb_dma_map(struct device *dev, struct sk_buff *skb,
 	if (dma_mapping_error(dev, map))
 		goto out_err;
 
-	sp->dma_maps[0] = map;
+	sp->dma_head = map;
 	for (i = 0; i < sp->nr_frags; i++) {
 		skb_frag_t *fp = &sp->frags[i];
 
@@ -28,9 +28,8 @@ int skb_dma_map(struct device *dev, struct sk_buff *skb,
 				   fp->size, dir);
 		if (dma_mapping_error(dev, map))
 			goto unwind;
-		sp->dma_maps[i + 1] = map;
+		sp->dma_maps[i] = map;
 	}
-	sp->num_dma_maps = i + 1;
 
 	return 0;
 
@@ -38,10 +37,10 @@ unwind:
 	while (--i >= 0) {
 		skb_frag_t *fp = &sp->frags[i];
 
-		dma_unmap_page(dev, sp->dma_maps[i + 1],
+		dma_unmap_page(dev, sp->dma_maps[i],
 			       fp->size, dir);
 	}
-	dma_unmap_single(dev, sp->dma_maps[0],
+	dma_unmap_single(dev, sp->dma_head,
 			 skb_headlen(skb), dir);
 out_err:
 	return -ENOMEM;
@@ -54,12 +53,12 @@ void skb_dma_unmap(struct device *dev, struct sk_buff *skb,
 	struct skb_shared_info *sp = skb_shinfo(skb);
 	int i;
 
-	dma_unmap_single(dev, sp->dma_maps[0],
+	dma_unmap_single(dev, sp->dma_head,
 			 skb_headlen(skb), dir);
 	for (i = 0; i < sp->nr_frags; i++) {
 		skb_frag_t *fp = &sp->frags[i];
 
-		dma_unmap_page(dev, sp->dma_maps[i + 1],
+		dma_unmap_page(dev, sp->dma_maps[i],
 			       fp->size, dir);
 	}
 }
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 8e815e6..b94d777 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -210,7 +210,7 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
 	shinfo->gso_type = 0;
 	shinfo->ip6_frag_id = 0;
 	shinfo->tx_flags.flags = 0;
-	shinfo->frag_list = NULL;
+	skb_frag_list_init(skb);
 	memset(&shinfo->hwtstamps, 0, sizeof(shinfo->hwtstamps));
 
 	if (fclone) {
@@ -323,7 +323,7 @@ static void skb_clone_fraglist(struct sk_buff *skb)
 {
 	struct sk_buff *list;
 
-	for (list = skb_shinfo(skb)->frag_list; list; list = list->next)
+	skb_walk_frags(skb, list)
 		skb_get(list);
 }
 
@@ -338,7 +338,7 @@ static void skb_release_data(struct sk_buff *skb)
 				put_page(skb_shinfo(skb)->frags[i].page);
 		}
 
-		if (skb_shinfo(skb)->frag_list)
+		if (skb_has_frags(skb))
 			skb_drop_fraglist(skb);
 
 		kfree(skb->head);
@@ -381,7 +381,7 @@ static void kfree_skbmem(struct sk_buff *skb)
 
 static void skb_release_head_state(struct sk_buff *skb)
 {
-	dst_release(skb->dst);
+	skb_dst_drop(skb);
 #ifdef CONFIG_XFRM
 	secpath_put(skb->sp);
 #endif
@@ -503,7 +503,7 @@ int skb_recycle_check(struct sk_buff *skb, int skb_size)
 	shinfo->gso_type = 0;
 	shinfo->ip6_frag_id = 0;
 	shinfo->tx_flags.flags = 0;
-	shinfo->frag_list = NULL;
+	skb_frag_list_init(skb);
 	memset(&shinfo->hwtstamps, 0, sizeof(shinfo->hwtstamps));
 
 	memset(skb, 0, offsetof(struct sk_buff, tail));
@@ -521,7 +521,7 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
 	new->transport_header	= old->transport_header;
 	new->network_header	= old->network_header;
 	new->mac_header		= old->mac_header;
-	new->dst		= dst_clone(old->dst);
+	skb_dst_set(new, dst_clone(skb_dst(old)));
 #ifdef CONFIG_XFRM
 	new->sp			= secpath_get(old->sp);
 #endif
@@ -552,7 +552,6 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
 	new->vlan_tci		= old->vlan_tci;
 #if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
 	new->do_not_encrypt	= old->do_not_encrypt;
-	new->requeue		= old->requeue;
 #endif
 
 	skb_copy_secmark(new, old);
@@ -758,7 +757,7 @@ struct sk_buff *pskb_copy(struct sk_buff *skb, gfp_t gfp_mask)
 		skb_shinfo(n)->nr_frags = i;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
+	if (skb_has_frags(skb)) {
 		skb_shinfo(n)->frag_list = skb_shinfo(skb)->frag_list;
 		skb_clone_fraglist(n);
 	}
@@ -821,7 +820,7 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
 		get_page(skb_shinfo(skb)->frags[i].page);
 
-	if (skb_shinfo(skb)->frag_list)
+	if (skb_has_frags(skb))
 		skb_clone_fraglist(skb);
 
 	skb_release_data(skb);
@@ -1093,7 +1092,7 @@ drop_pages:
 		for (; i < nfrags; i++)
 			put_page(skb_shinfo(skb)->frags[i].page);
 
-		if (skb_shinfo(skb)->frag_list)
+		if (skb_has_frags(skb))
 			skb_drop_fraglist(skb);
 		goto done;
 	}
@@ -1188,7 +1187,7 @@ unsigned char *__pskb_pull_tail(struct sk_buff *skb, int delta)
 	/* Optimization: no fragments, no reasons to preestimate
 	 * size of pulled pages. Superb.
 	 */
-	if (!skb_shinfo(skb)->frag_list)
+	if (!skb_has_frags(skb))
 		goto pull_pages;
 
 	/* Estimate size of pulled pages. */
@@ -1285,8 +1284,9 @@ EXPORT_SYMBOL(__pskb_pull_tail);
 
 int skb_copy_bits(const struct sk_buff *skb, int offset, void *to, int len)
 {
-	int i, copy;
 	int start = skb_headlen(skb);
+	struct sk_buff *frag_iter;
+	int i, copy;
 
 	if (offset > (int)skb->len - len)
 		goto fault;
@@ -1328,28 +1328,23 @@ int skb_copy_bits(const struct sk_buff *skb, int offset, void *to, int len)
 		start = end;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
+	skb_walk_frags(skb, frag_iter) {
+		int end;
 
-		for (; list; list = list->next) {
-			int end;
-
-			WARN_ON(start > offset + len);
-
-			end = start + list->len;
-			if ((copy = end - offset) > 0) {
-				if (copy > len)
-					copy = len;
-				if (skb_copy_bits(list, offset - start,
-						  to, copy))
-					goto fault;
-				if ((len -= copy) == 0)
-					return 0;
-				offset += copy;
-				to     += copy;
-			}
-			start = end;
+		WARN_ON(start > offset + len);
+
+		end = start + frag_iter->len;
+		if ((copy = end - offset) > 0) {
+			if (copy > len)
+				copy = len;
+			if (skb_copy_bits(frag_iter, offset - start, to, copy))
+				goto fault;
+			if ((len -= copy) == 0)
+				return 0;
+			offset += copy;
+			to     += copy;
 		}
+		start = end;
 	}
 	if (!len)
 		return 0;
@@ -1534,6 +1529,7 @@ int skb_splice_bits(struct sk_buff *skb, unsigned int offset,
 		.ops = &sock_pipe_buf_ops,
 		.spd_release = sock_spd_release,
 	};
+	struct sk_buff *frag_iter;
 	struct sock *sk = skb->sk;
 
 	/*
@@ -1548,13 +1544,11 @@ int skb_splice_bits(struct sk_buff *skb, unsigned int offset,
 	/*
 	 * now see if we have a frag_list to map
 	 */
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
-
-		for (; list && tlen; list = list->next) {
-			if (__skb_splice_bits(list, &offset, &tlen, &spd, sk))
-				break;
-		}
+	skb_walk_frags(skb, frag_iter) {
+		if (!tlen)
+			break;
+		if (__skb_splice_bits(frag_iter, &offset, &tlen, &spd, sk))
+			break;
 	}
 
 done:
@@ -1593,8 +1587,9 @@ done:
 
 int skb_store_bits(struct sk_buff *skb, int offset, const void *from, int len)
 {
-	int i, copy;
 	int start = skb_headlen(skb);
+	struct sk_buff *frag_iter;
+	int i, copy;
 
 	if (offset > (int)skb->len - len)
 		goto fault;
@@ -1635,28 +1630,24 @@ int skb_store_bits(struct sk_buff *skb, int offset, const void *from, int len)
 		start = end;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
+	skb_walk_frags(skb, frag_iter) {
+		int end;
 
-		for (; list; list = list->next) {
-			int end;
-
-			WARN_ON(start > offset + len);
-
-			end = start + list->len;
-			if ((copy = end - offset) > 0) {
-				if (copy > len)
-					copy = len;
-				if (skb_store_bits(list, offset - start,
-						   from, copy))
-					goto fault;
-				if ((len -= copy) == 0)
-					return 0;
-				offset += copy;
-				from += copy;
-			}
-			start = end;
+		WARN_ON(start > offset + len);
+
+		end = start + frag_iter->len;
+		if ((copy = end - offset) > 0) {
+			if (copy > len)
+				copy = len;
+			if (skb_store_bits(frag_iter, offset - start,
+					   from, copy))
+				goto fault;
+			if ((len -= copy) == 0)
+				return 0;
+			offset += copy;
+			from += copy;
 		}
+		start = end;
 	}
 	if (!len)
 		return 0;
@@ -1673,6 +1664,7 @@ __wsum skb_checksum(const struct sk_buff *skb, int offset,
 {
 	int start = skb_headlen(skb);
 	int i, copy = start - offset;
+	struct sk_buff *frag_iter;
 	int pos = 0;
 
 	/* Checksum header. */
@@ -1712,29 +1704,25 @@ __wsum skb_checksum(const struct sk_buff *skb, int offset,
 		start = end;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
+	skb_walk_frags(skb, frag_iter) {
+		int end;
 
-		for (; list; list = list->next) {
-			int end;
-
-			WARN_ON(start > offset + len);
-
-			end = start + list->len;
-			if ((copy = end - offset) > 0) {
-				__wsum csum2;
-				if (copy > len)
-					copy = len;
-				csum2 = skb_checksum(list, offset - start,
-						     copy, 0);
-				csum = csum_block_add(csum, csum2, pos);
-				if ((len -= copy) == 0)
-					return csum;
-				offset += copy;
-				pos    += copy;
-			}
-			start = end;
+		WARN_ON(start > offset + len);
+
+		end = start + frag_iter->len;
+		if ((copy = end - offset) > 0) {
+			__wsum csum2;
+			if (copy > len)
+				copy = len;
+			csum2 = skb_checksum(frag_iter, offset - start,
+					     copy, 0);
+			csum = csum_block_add(csum, csum2, pos);
+			if ((len -= copy) == 0)
+				return csum;
+			offset += copy;
+			pos    += copy;
 		}
+		start = end;
 	}
 	BUG_ON(len);
 
@@ -1749,6 +1737,7 @@ __wsum skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
 {
 	int start = skb_headlen(skb);
 	int i, copy = start - offset;
+	struct sk_buff *frag_iter;
 	int pos = 0;
 
 	/* Copy header. */
@@ -1793,31 +1782,27 @@ __wsum skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
 		start = end;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
+	skb_walk_frags(skb, frag_iter) {
+		__wsum csum2;
+		int end;
 
-		for (; list; list = list->next) {
-			__wsum csum2;
-			int end;
-
-			WARN_ON(start > offset + len);
-
-			end = start + list->len;
-			if ((copy = end - offset) > 0) {
-				if (copy > len)
-					copy = len;
-				csum2 = skb_copy_and_csum_bits(list,
-							       offset - start,
-							       to, copy, 0);
-				csum = csum_block_add(csum, csum2, pos);
-				if ((len -= copy) == 0)
-					return csum;
-				offset += copy;
-				to     += copy;
-				pos    += copy;
-			}
-			start = end;
+		WARN_ON(start > offset + len);
+
+		end = start + frag_iter->len;
+		if ((copy = end - offset) > 0) {
+			if (copy > len)
+				copy = len;
+			csum2 = skb_copy_and_csum_bits(frag_iter,
+						       offset - start,
+						       to, copy, 0);
+			csum = csum_block_add(csum, csum2, pos);
+			if ((len -= copy) == 0)
+				return csum;
+			offset += copy;
+			to     += copy;
+			pos    += copy;
 		}
+		start = end;
 	}
 	BUG_ON(len);
 	return csum;
@@ -2327,8 +2312,7 @@ next_skb:
 		st->frag_data = NULL;
 	}
 
-	if (st->root_skb == st->cur_skb &&
-	    skb_shinfo(st->root_skb)->frag_list) {
+	if (st->root_skb == st->cur_skb && skb_has_frags(st->root_skb)) {
 		st->cur_skb = skb_shinfo(st->root_skb)->frag_list;
 		st->frag_idx = 0;
 		goto next_skb;
@@ -2639,7 +2623,7 @@ struct sk_buff *skb_segment(struct sk_buff *skb, int features)
 			} else
 				skb_get(fskb2);
 
-			BUG_ON(skb_shinfo(nskb)->frag_list);
+			SKB_FRAG_ASSERT(nskb);
 			skb_shinfo(nskb)->frag_list = fskb2;
 		}
 
@@ -2796,6 +2780,7 @@ __skb_to_sgvec(struct sk_buff *skb, struct scatterlist *sg, int offset, int len)
 {
 	int start = skb_headlen(skb);
 	int i, copy = start - offset;
+	struct sk_buff *frag_iter;
 	int elt = 0;
 
 	if (copy > 0) {
@@ -2829,26 +2814,22 @@ __skb_to_sgvec(struct sk_buff *skb, struct scatterlist *sg, int offset, int len)
 		start = end;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
-
-		for (; list; list = list->next) {
-			int end;
+	skb_walk_frags(skb, frag_iter) {
+		int end;
 
-			WARN_ON(start > offset + len);
+		WARN_ON(start > offset + len);
 
-			end = start + list->len;
-			if ((copy = end - offset) > 0) {
-				if (copy > len)
-					copy = len;
-				elt += __skb_to_sgvec(list, sg+elt, offset - start,
-						      copy);
-				if ((len -= copy) == 0)
-					return elt;
-				offset += copy;
-			}
-			start = end;
+		end = start + frag_iter->len;
+		if ((copy = end - offset) > 0) {
+			if (copy > len)
+				copy = len;
+			elt += __skb_to_sgvec(frag_iter, sg+elt, offset - start,
+					      copy);
+			if ((len -= copy) == 0)
+				return elt;
+			offset += copy;
 		}
+		start = end;
 	}
 	BUG_ON(len);
 	return elt;
@@ -2896,7 +2877,7 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
 		return -ENOMEM;
 
 	/* Easy case. Most of packets will go this way. */
-	if (!skb_shinfo(skb)->frag_list) {
+	if (!skb_has_frags(skb)) {
 		/* A little of trouble, not enough of space for trailer.
 		 * This should not happen, when stack is tuned to generate
 		 * good frames. OK, on miss we reallocate and reserve even more
@@ -2931,7 +2912,7 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
 
 		if (skb1->next == NULL && tailbits) {
 			if (skb_shinfo(skb1)->nr_frags ||
-			    skb_shinfo(skb1)->frag_list ||
+			    skb_has_frags(skb1) ||
 			    skb_tailroom(skb1) < tailbits)
 				ntail = tailbits + 128;
 		}
@@ -2940,7 +2921,7 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
 		    skb_cloned(skb1) ||
 		    ntail ||
 		    skb_shinfo(skb1)->nr_frags ||
-		    skb_shinfo(skb1)->frag_list) {
+		    skb_has_frags(skb1)) {
 			struct sk_buff *skb2;
 
 			/* Fuck, we are miserable poor guys... */
@@ -3026,12 +3007,12 @@ EXPORT_SYMBOL_GPL(skb_tstamp_tx);
  */
 bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off)
 {
-	if (unlikely(start > skb->len - 2) ||
-	    unlikely((int)start + off > skb->len - 2)) {
+	if (unlikely(start > skb_headlen(skb)) ||
+	    unlikely((int)start + off > skb_headlen(skb) - 2)) {
 		if (net_ratelimit())
 			printk(KERN_WARNING
 			       "bad partial csum: csum=%u/%u len=%u\n",
-			       start, off, skb->len);
+			       start, off, skb_headlen(skb));
 		return false;
 	}
 	skb->ip_summed = CHECKSUM_PARTIAL;
diff --git a/net/core/sock.c b/net/core/sock.c
index 7dbf3ff..06e26b7 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -155,6 +155,7 @@ static const char *af_family_key_strings[AF_MAX+1] = {
   "sk_lock-27"       , "sk_lock-28"          , "sk_lock-AF_CAN"      ,
   "sk_lock-AF_TIPC"  , "sk_lock-AF_BLUETOOTH", "sk_lock-IUCV"        ,
   "sk_lock-AF_RXRPC" , "sk_lock-AF_ISDN"     , "sk_lock-AF_PHONET"   ,
+  "sk_lock-AF_IEEE802154",
   "sk_lock-AF_MAX"
 };
 static const char *af_family_slock_key_strings[AF_MAX+1] = {
@@ -170,6 +171,7 @@ static const char *af_family_slock_key_strings[AF_MAX+1] = {
   "slock-27"       , "slock-28"          , "slock-AF_CAN"      ,
   "slock-AF_TIPC"  , "slock-AF_BLUETOOTH", "slock-AF_IUCV"     ,
   "slock-AF_RXRPC" , "slock-AF_ISDN"     , "slock-AF_PHONET"   ,
+  "slock-AF_IEEE802154",
   "slock-AF_MAX"
 };
 static const char *af_family_clock_key_strings[AF_MAX+1] = {
@@ -185,6 +187,7 @@ static const char *af_family_clock_key_strings[AF_MAX+1] = {
   "clock-27"       , "clock-28"          , "clock-AF_CAN"      ,
   "clock-AF_TIPC"  , "clock-AF_BLUETOOTH", "clock-AF_IUCV"     ,
   "clock-AF_RXRPC" , "clock-AF_ISDN"     , "clock-AF_PHONET"   ,
+  "clock-AF_IEEE802154",
   "clock-AF_MAX"
 };
 
@@ -212,6 +215,7 @@ __u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;
 
 /* Maximal space eaten by iovec or ancilliary data plus some space */
 int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512);
+EXPORT_SYMBOL(sysctl_optmem_max);
 
 static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
 {
@@ -444,7 +448,7 @@ static inline void sock_valbool_flag(struct sock *sk, int bit, int valbool)
 int sock_setsockopt(struct socket *sock, int level, int optname,
 		    char __user *optval, int optlen)
 {
-	struct sock *sk=sock->sk;
+	struct sock *sk = sock->sk;
 	int val;
 	int valbool;
 	struct linger ling;
@@ -463,15 +467,15 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 	if (get_user(val, (int __user *)optval))
 		return -EFAULT;
 
-	valbool = val?1:0;
+	valbool = val ? 1 : 0;
 
 	lock_sock(sk);
 
-	switch(optname) {
+	switch (optname) {
 	case SO_DEBUG:
-		if (val && !capable(CAP_NET_ADMIN)) {
+		if (val && !capable(CAP_NET_ADMIN))
 			ret = -EACCES;
-		} else
+		else
 			sock_valbool_flag(sk, SOCK_DBG, valbool);
 		break;
 	case SO_REUSEADDR:
@@ -582,7 +586,7 @@ set_rcvbuf:
 			ret = -EINVAL;	/* 1003.1g */
 			break;
 		}
-		if (copy_from_user(&ling,optval,sizeof(ling))) {
+		if (copy_from_user(&ling, optval, sizeof(ling))) {
 			ret = -EFAULT;
 			break;
 		}
@@ -690,9 +694,8 @@ set_rcvbuf:
 	case SO_MARK:
 		if (!capable(CAP_NET_ADMIN))
 			ret = -EPERM;
-		else {
+		else
 			sk->sk_mark = val;
-		}
 		break;
 
 		/* We implement the SO_SNDLOWAT etc to
@@ -704,6 +707,7 @@ set_rcvbuf:
 	release_sock(sk);
 	return ret;
 }
+EXPORT_SYMBOL(sock_setsockopt);
 
 
 int sock_getsockopt(struct socket *sock, int level, int optname,
@@ -727,7 +731,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 
 	memset(&v, 0, sizeof(v));
 
-	switch(optname) {
+	switch (optname) {
 	case SO_DEBUG:
 		v.val = sock_flag(sk, SOCK_DBG);
 		break;
@@ -762,7 +766,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 
 	case SO_ERROR:
 		v.val = -sock_error(sk);
-		if (v.val==0)
+		if (v.val == 0)
 			v.val = xchg(&sk->sk_err_soft, 0);
 		break;
 
@@ -816,7 +820,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 		break;
 
 	case SO_RCVTIMEO:
-		lv=sizeof(struct timeval);
+		lv = sizeof(struct timeval);
 		if (sk->sk_rcvtimeo == MAX_SCHEDULE_TIMEOUT) {
 			v.tm.tv_sec = 0;
 			v.tm.tv_usec = 0;
@@ -827,7 +831,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 		break;
 
 	case SO_SNDTIMEO:
-		lv=sizeof(struct timeval);
+		lv = sizeof(struct timeval);
 		if (sk->sk_sndtimeo == MAX_SCHEDULE_TIMEOUT) {
 			v.tm.tv_sec = 0;
 			v.tm.tv_usec = 0;
@@ -842,7 +846,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 		break;
 
 	case SO_SNDLOWAT:
-		v.val=1;
+		v.val = 1;
 		break;
 
 	case SO_PASSCRED:
@@ -1002,8 +1006,9 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
 
 	return sk;
 }
+EXPORT_SYMBOL(sk_alloc);
 
-void sk_free(struct sock *sk)
+static void __sk_free(struct sock *sk)
 {
 	struct sk_filter *filter;
 
@@ -1027,6 +1032,18 @@ void sk_free(struct sock *sk)
 	sk_prot_free(sk->sk_prot_creator, sk);
 }
 
+void sk_free(struct sock *sk)
+{
+	/*
+	 * We substract one from sk_wmem_alloc and can know if
+	 * some packets are still in some tx queue.
+	 * If not null, sock_wfree() will call __sk_free(sk) later
+	 */
+	if (atomic_dec_and_test(&sk->sk_wmem_alloc))
+		__sk_free(sk);
+}
+EXPORT_SYMBOL(sk_free);
+
 /*
  * Last sock_put should drop referrence to sk->sk_net. It has already
  * been dropped in sk_change_net. Taking referrence to stopping namespace
@@ -1065,7 +1082,10 @@ struct sock *sk_clone(const struct sock *sk, const gfp_t priority)
 		newsk->sk_backlog.head	= newsk->sk_backlog.tail = NULL;
 
 		atomic_set(&newsk->sk_rmem_alloc, 0);
-		atomic_set(&newsk->sk_wmem_alloc, 0);
+		/*
+		 * sk_wmem_alloc set to one (see sk_free() and sock_wfree())
+		 */
+		atomic_set(&newsk->sk_wmem_alloc, 1);
 		atomic_set(&newsk->sk_omem_alloc, 0);
 		skb_queue_head_init(&newsk->sk_receive_queue);
 		skb_queue_head_init(&newsk->sk_write_queue);
@@ -1126,7 +1146,6 @@ struct sock *sk_clone(const struct sock *sk, const gfp_t priority)
 out:
 	return newsk;
 }
-
 EXPORT_SYMBOL_GPL(sk_clone);
 
 void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
@@ -1170,13 +1189,20 @@ void __init sk_init(void)
 void sock_wfree(struct sk_buff *skb)
 {
 	struct sock *sk = skb->sk;
+	int res;
 
 	/* In case it might be waiting for more memory. */
-	atomic_sub(skb->truesize, &sk->sk_wmem_alloc);
+	res = atomic_sub_return(skb->truesize, &sk->sk_wmem_alloc);
 	if (!sock_flag(sk, SOCK_USE_WRITE_QUEUE))
 		sk->sk_write_space(sk);
-	sock_put(sk);
+	/*
+	 * if sk_wmem_alloc reached 0, we are last user and should
+	 * free this sock, as sk_free() call could not do it.
+	 */
+	if (res == 0)
+		__sk_free(sk);
 }
+EXPORT_SYMBOL(sock_wfree);
 
 /*
  * Read buffer destructor automatically called from kfree_skb.
@@ -1188,6 +1214,7 @@ void sock_rfree(struct sk_buff *skb)
 	atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
 	sk_mem_uncharge(skb->sk, skb->truesize);
 }
+EXPORT_SYMBOL(sock_rfree);
 
 
 int sock_i_uid(struct sock *sk)
@@ -1199,6 +1226,7 @@ int sock_i_uid(struct sock *sk)
 	read_unlock(&sk->sk_callback_lock);
 	return uid;
 }
+EXPORT_SYMBOL(sock_i_uid);
 
 unsigned long sock_i_ino(struct sock *sk)
 {
@@ -1209,6 +1237,7 @@ unsigned long sock_i_ino(struct sock *sk)
 	read_unlock(&sk->sk_callback_lock);
 	return ino;
 }
+EXPORT_SYMBOL(sock_i_ino);
 
 /*
  * Allocate a skb from the socket's send buffer.
@@ -1217,7 +1246,7 @@ struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force,
 			     gfp_t priority)
 {
 	if (force || atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) {
-		struct sk_buff * skb = alloc_skb(size, priority);
+		struct sk_buff *skb = alloc_skb(size, priority);
 		if (skb) {
 			skb_set_owner_w(skb, sk);
 			return skb;
@@ -1225,6 +1254,7 @@ struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force,
 	}
 	return NULL;
 }
+EXPORT_SYMBOL(sock_wmalloc);
 
 /*
  * Allocate a skb from the socket's receive buffer.
@@ -1261,6 +1291,7 @@ void *sock_kmalloc(struct sock *sk, int size, gfp_t priority)
 	}
 	return NULL;
 }
+EXPORT_SYMBOL(sock_kmalloc);
 
 /*
  * Free an option memory block.
@@ -1270,11 +1301,12 @@ void sock_kfree_s(struct sock *sk, void *mem, int size)
 	kfree(mem);
 	atomic_sub(size, &sk->sk_omem_alloc);
 }
+EXPORT_SYMBOL(sock_kfree_s);
 
 /* It is almost wait_for_tcp_memory minus release_sock/lock_sock.
    I think, these locks should be removed for datagram sockets.
  */
-static long sock_wait_for_wmem(struct sock * sk, long timeo)
+static long sock_wait_for_wmem(struct sock *sk, long timeo)
 {
 	DEFINE_WAIT(wait);
 
@@ -1392,6 +1424,7 @@ struct sk_buff *sock_alloc_send_skb(struct sock *sk, unsigned long size,
 {
 	return sock_alloc_send_pskb(sk, size, 0, noblock, errcode);
 }
+EXPORT_SYMBOL(sock_alloc_send_skb);
 
 static void __lock_sock(struct sock *sk)
 {
@@ -1460,7 +1493,6 @@ int sk_wait_data(struct sock *sk, long *timeo)
 	finish_wait(sk->sk_sleep, &wait);
 	return rc;
 }
-
 EXPORT_SYMBOL(sk_wait_data);
 
 /**
@@ -1541,7 +1573,6 @@ suppress_allocation:
 	atomic_sub(amt, prot->memory_allocated);
 	return 0;
 }
-
 EXPORT_SYMBOL(__sk_mem_schedule);
 
 /**
@@ -1560,7 +1591,6 @@ void __sk_mem_reclaim(struct sock *sk)
 	    (atomic_read(prot->memory_allocated) < prot->sysctl_mem[0]))
 		*prot->memory_pressure = 0;
 }
-
 EXPORT_SYMBOL(__sk_mem_reclaim);
 
 
@@ -1575,78 +1605,92 @@ int sock_no_bind(struct socket *sock, struct sockaddr *saddr, int len)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_bind);
 
 int sock_no_connect(struct socket *sock, struct sockaddr *saddr,
 		    int len, int flags)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_connect);
 
 int sock_no_socketpair(struct socket *sock1, struct socket *sock2)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_socketpair);
 
 int sock_no_accept(struct socket *sock, struct socket *newsock, int flags)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_accept);
 
 int sock_no_getname(struct socket *sock, struct sockaddr *saddr,
 		    int *len, int peer)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_getname);
 
-unsigned int sock_no_poll(struct file * file, struct socket *sock, poll_table *pt)
+unsigned int sock_no_poll(struct file *file, struct socket *sock, poll_table *pt)
 {
 	return 0;
 }
+EXPORT_SYMBOL(sock_no_poll);
 
 int sock_no_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_ioctl);
 
 int sock_no_listen(struct socket *sock, int backlog)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_listen);
 
 int sock_no_shutdown(struct socket *sock, int how)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_shutdown);
 
 int sock_no_setsockopt(struct socket *sock, int level, int optname,
 		    char __user *optval, int optlen)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_setsockopt);
 
 int sock_no_getsockopt(struct socket *sock, int level, int optname,
 		    char __user *optval, int __user *optlen)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_getsockopt);
 
 int sock_no_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
 		    size_t len)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_sendmsg);
 
 int sock_no_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
 		    size_t len, int flags)
 {
 	return -EOPNOTSUPP;
 }
+EXPORT_SYMBOL(sock_no_recvmsg);
 
 int sock_no_mmap(struct file *file, struct socket *sock, struct vm_area_struct *vma)
 {
 	/* Mirror missing mmap method error code */
 	return -ENODEV;
 }
+EXPORT_SYMBOL(sock_no_mmap);
 
 ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags)
 {
@@ -1660,6 +1704,7 @@ ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset, siz
 	kunmap(page);
 	return res;
 }
+EXPORT_SYMBOL(sock_no_sendpage);
 
 /*
  *	Default Socket Callbacks
@@ -1723,6 +1768,7 @@ void sk_send_sigurg(struct sock *sk)
 		if (send_sigurg(&sk->sk_socket->file->f_owner))
 			sk_wake_async(sk, SOCK_WAKE_URG, POLL_PRI);
 }
+EXPORT_SYMBOL(sk_send_sigurg);
 
 void sk_reset_timer(struct sock *sk, struct timer_list* timer,
 		    unsigned long expires)
@@ -1730,7 +1776,6 @@ void sk_reset_timer(struct sock *sk, struct timer_list* timer,
 	if (!mod_timer(timer, expires))
 		sock_hold(sk);
 }
-
 EXPORT_SYMBOL(sk_reset_timer);
 
 void sk_stop_timer(struct sock *sk, struct timer_list* timer)
@@ -1738,7 +1783,6 @@ void sk_stop_timer(struct sock *sk, struct timer_list* timer)
 	if (timer_pending(timer) && del_timer(timer))
 		__sock_put(sk);
 }
-
 EXPORT_SYMBOL(sk_stop_timer);
 
 void sock_init_data(struct socket *sock, struct sock *sk)
@@ -1795,8 +1839,10 @@ void sock_init_data(struct socket *sock, struct sock *sk)
 	sk->sk_stamp = ktime_set(-1L, 0);
 
 	atomic_set(&sk->sk_refcnt, 1);
+	atomic_set(&sk->sk_wmem_alloc, 1);
 	atomic_set(&sk->sk_drops, 0);
 }
+EXPORT_SYMBOL(sock_init_data);
 
 void lock_sock_nested(struct sock *sk, int subclass)
 {
@@ -1812,7 +1858,6 @@ void lock_sock_nested(struct sock *sk, int subclass)
 	mutex_acquire(&sk->sk_lock.dep_map, subclass, 0, _RET_IP_);
 	local_bh_enable();
 }
-
 EXPORT_SYMBOL(lock_sock_nested);
 
 void release_sock(struct sock *sk)
@@ -1895,7 +1940,6 @@ int sock_common_getsockopt(struct socket *sock, int level, int optname,
 
 	return sk->sk_prot->getsockopt(sk, level, optname, optval, optlen);
 }
-
 EXPORT_SYMBOL(sock_common_getsockopt);
 
 #ifdef CONFIG_COMPAT
@@ -1925,7 +1969,6 @@ int sock_common_recvmsg(struct kiocb *iocb, struct socket *sock,
 		msg->msg_namelen = addr_len;
 	return err;
 }
-
 EXPORT_SYMBOL(sock_common_recvmsg);
 
 /*
@@ -1938,7 +1981,6 @@ int sock_common_setsockopt(struct socket *sock, int level, int optname,
 
 	return sk->sk_prot->setsockopt(sk, level, optname, optval, optlen);
 }
-
 EXPORT_SYMBOL(sock_common_setsockopt);
 
 #ifdef CONFIG_COMPAT
@@ -1989,7 +2031,6 @@ void sk_common_release(struct sock *sk)
 	sk_refcnt_debug_release(sk);
 	sock_put(sk);
 }
-
 EXPORT_SYMBOL(sk_common_release);
 
 static DEFINE_RWLOCK(proto_list_lock);
@@ -2171,7 +2212,6 @@ out_free_sock_slab:
 out:
 	return -ENOBUFS;
 }
-
 EXPORT_SYMBOL(proto_register);
 
 void proto_unregister(struct proto *prot)
@@ -2198,7 +2238,6 @@ void proto_unregister(struct proto *prot)
 		prot->twsk_prot->twsk_slab = NULL;
 	}
 }
-
 EXPORT_SYMBOL(proto_unregister);
 
 #ifdef CONFIG_PROC_FS
@@ -2324,33 +2363,3 @@ static int __init proto_init(void)
 subsys_initcall(proto_init);
 
 #endif /* PROC_FS */
-
-EXPORT_SYMBOL(sk_alloc);
-EXPORT_SYMBOL(sk_free);
-EXPORT_SYMBOL(sk_send_sigurg);
-EXPORT_SYMBOL(sock_alloc_send_skb);
-EXPORT_SYMBOL(sock_init_data);
-EXPORT_SYMBOL(sock_kfree_s);
-EXPORT_SYMBOL(sock_kmalloc);
-EXPORT_SYMBOL(sock_no_accept);
-EXPORT_SYMBOL(sock_no_bind);
-EXPORT_SYMBOL(sock_no_connect);
-EXPORT_SYMBOL(sock_no_getname);
-EXPORT_SYMBOL(sock_no_getsockopt);
-EXPORT_SYMBOL(sock_no_ioctl);
-EXPORT_SYMBOL(sock_no_listen);
-EXPORT_SYMBOL(sock_no_mmap);
-EXPORT_SYMBOL(sock_no_poll);
-EXPORT_SYMBOL(sock_no_recvmsg);
-EXPORT_SYMBOL(sock_no_sendmsg);
-EXPORT_SYMBOL(sock_no_sendpage);
-EXPORT_SYMBOL(sock_no_setsockopt);
-EXPORT_SYMBOL(sock_no_shutdown);
-EXPORT_SYMBOL(sock_no_socketpair);
-EXPORT_SYMBOL(sock_rfree);
-EXPORT_SYMBOL(sock_setsockopt);
-EXPORT_SYMBOL(sock_wfree);
-EXPORT_SYMBOL(sock_wmalloc);
-EXPORT_SYMBOL(sock_i_uid);
-EXPORT_SYMBOL(sock_i_ino);
-EXPORT_SYMBOL(sysctl_optmem_max);
diff --git a/net/core/user_dma.c b/net/core/user_dma.c
index 164b090..25d717e 100644
--- a/net/core/user_dma.c
+++ b/net/core/user_dma.c
@@ -51,6 +51,7 @@ int dma_skb_copy_datagram_iovec(struct dma_chan *chan,
 {
 	int start = skb_headlen(skb);
 	int i, copy = start - offset;
+	struct sk_buff *frag_iter;
 	dma_cookie_t cookie = 0;
 
 	/* Copy header. */
@@ -94,31 +95,28 @@ int dma_skb_copy_datagram_iovec(struct dma_chan *chan,
 		start = end;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
-
-		for (; list; list = list->next) {
-			int end;
-
-			WARN_ON(start > offset + len);
-
-			end = start + list->len;
-			copy = end - offset;
-			if (copy > 0) {
-				if (copy > len)
-					copy = len;
-				cookie = dma_skb_copy_datagram_iovec(chan, list,
-						offset - start, to, copy,
-						pinned_list);
-				if (cookie < 0)
-					goto fault;
-				len -= copy;
-				if (len == 0)
-					goto end;
-				offset += copy;
-			}
-			start = end;
+	skb_walk_frags(skb, frag_iter) {
+		int end;
+
+		WARN_ON(start > offset + len);
+
+		end = start + frag_iter->len;
+		copy = end - offset;
+		if (copy > 0) {
+			if (copy > len)
+				copy = len;
+			cookie = dma_skb_copy_datagram_iovec(chan, frag_iter,
+							     offset - start,
+							     to, copy,
+							     pinned_list);
+			if (cookie < 0)
+				goto fault;
+			len -= copy;
+			if (len == 0)
+				goto end;
+			offset += copy;
 		}
+		start = end;
 	}
 
 end: