Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (44 commits)
  qlge: Fix sparse warnings for tx ring indexes.
  qlge: Fix sparse warning regarding rx buffer queues.
  qlge: Fix sparse endian warning in ql_hw_csum_setup().
  qlge: Fix sparse endian warning for inbound packet control block flags.
  qlge: Fix sparse warnings for byte swapping in qlge_ethool.c
  myri10ge: print MAC and serial number on probe failure
  pkt_sched: cls_u32: Fix locking in u32_change()
  iucv: fix cpu hotplug
  af_iucv: Free iucv path/socket in path_pending callback
  af_iucv: avoid left over IUCV connections from failing connects
  af_iucv: New error return codes for connect()
  net/ehea: bitops work on unsigned longs
  Revert "net: Fix for initial link state in 2.6.28"
  tcp: Kill extraneous SPLICE_F_NONBLOCK checks.
  tcp: don't mask EOF and socket errors on nonblocking splice receive
  dccp: Integrate the TFRC library with DCCP
  dccp: Clean up ccid.c after integration of CCID plugins
  dccp: Lockless integration of CCID congestion-control plugins
  qeth: get rid of extra argument after printk to dev_* conversion
  qeth: No large send using EDDP for HiperSockets.
  ...

30 files changed, 488 insertions, 493 deletions

diff --git a/net/can/bcm.c b/net/can/bcm.c
index da0d426c0ce4..6248ae2502c7 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -70,7 +70,7 @@
 
 #define CAN_BCM_VERSION CAN_VERSION
 static __initdata const char banner[] = KERN_INFO
-	"can: broadcast manager protocol (rev " CAN_BCM_VERSION ")\n";
+	"can: broadcast manager protocol (rev " CAN_BCM_VERSION " t)\n";
 
 MODULE_DESCRIPTION("PF_CAN broadcast manager protocol");
 MODULE_LICENSE("Dual BSD/GPL");
@@ -90,6 +90,7 @@ struct bcm_op {
 	unsigned long frames_abs, frames_filtered;
 	struct timeval ival1, ival2;
 	struct hrtimer timer, thrtimer;
+	struct tasklet_struct tsklet, thrtsklet;
 	ktime_t rx_stamp, kt_ival1, kt_ival2, kt_lastmsg;
 	int rx_ifindex;
 	int count;
@@ -341,6 +342,23 @@ static void bcm_send_to_user(struct bcm_op *op, struct bcm_msg_head *head,
 	}
 }
 
+static void bcm_tx_timeout_tsklet(unsigned long data)
+{
+	struct bcm_op *op = (struct bcm_op *)data;
+	struct bcm_msg_head msg_head;
+
+	/* create notification to user */
+	msg_head.opcode  = TX_EXPIRED;
+	msg_head.flags   = op->flags;
+	msg_head.count   = op->count;
+	msg_head.ival1   = op->ival1;
+	msg_head.ival2   = op->ival2;
+	msg_head.can_id  = op->can_id;
+	msg_head.nframes = 0;
+
+	bcm_send_to_user(op, &msg_head, NULL, 0);
+}
+
 /*
  * bcm_tx_timeout_handler - performes cyclic CAN frame transmissions
  */
@@ -352,20 +370,8 @@ static enum hrtimer_restart bcm_tx_timeout_handler(struct hrtimer *hrtimer)
 	if (op->kt_ival1.tv64 && (op->count > 0)) {
 
 		op->count--;
-		if (!op->count && (op->flags & TX_COUNTEVT)) {
-			struct bcm_msg_head msg_head;
-
-			/* create notification to user */
-			msg_head.opcode  = TX_EXPIRED;
-			msg_head.flags   = op->flags;
-			msg_head.count   = op->count;
-			msg_head.ival1   = op->ival1;
-			msg_head.ival2   = op->ival2;
-			msg_head.can_id  = op->can_id;
-			msg_head.nframes = 0;
-
-			bcm_send_to_user(op, &msg_head, NULL, 0);
-		}
+		if (!op->count && (op->flags & TX_COUNTEVT))
+			tasklet_schedule(&op->tsklet);
 	}
 
 	if (op->kt_ival1.tv64 && (op->count > 0)) {
@@ -402,6 +408,9 @@ static void bcm_rx_changed(struct bcm_op *op, struct can_frame *data)
 	if (op->frames_filtered > ULONG_MAX/100)
 		op->frames_filtered = op->frames_abs = 0;
 
+	/* this element is not throttled anymore */
+	data->can_dlc &= (BCM_CAN_DLC_MASK|RX_RECV);
+
 	head.opcode  = RX_CHANGED;
 	head.flags   = op->flags;
 	head.count   = op->count;
@@ -420,37 +429,32 @@ static void bcm_rx_changed(struct bcm_op *op, struct can_frame *data)
  */
 static void bcm_rx_update_and_send(struct bcm_op *op,
 				   struct can_frame *lastdata,
-				   struct can_frame *rxdata)
+				   const struct can_frame *rxdata)
 {
 	memcpy(lastdata, rxdata, CFSIZ);
 
-	/* mark as used */
-	lastdata->can_dlc |= RX_RECV;
+	/* mark as used and throttled by default */
+	lastdata->can_dlc |= (RX_RECV|RX_THR);
 
-	/* throtteling mode inactive OR data update already on the run ? */
-	if (!op->kt_ival2.tv64 || hrtimer_callback_running(&op->thrtimer)) {
+	/* throtteling mode inactive ? */
+	if (!op->kt_ival2.tv64) {
 		/* send RX_CHANGED to the user immediately */
-		bcm_rx_changed(op, rxdata);
+		bcm_rx_changed(op, lastdata);
 		return;
 	}
 
-	if (hrtimer_active(&op->thrtimer)) {
-		/* mark as 'throttled' */
-		lastdata->can_dlc |= RX_THR;
+	/* with active throttling timer we are just done here */
+	if (hrtimer_active(&op->thrtimer))
 		return;
-	}
 
-	if (!op->kt_lastmsg.tv64) {
-		/* send first RX_CHANGED to the user immediately */
-		bcm_rx_changed(op, rxdata);
-		op->kt_lastmsg = ktime_get();
-		return;
-	}
+	/* first receiption with enabled throttling mode */
+	if (!op->kt_lastmsg.tv64)
+		goto rx_changed_settime;
 
+	/* got a second frame inside a potential throttle period? */
 	if (ktime_us_delta(ktime_get(), op->kt_lastmsg) <
 	    ktime_to_us(op->kt_ival2)) {
-		/* mark as 'throttled' and start timer */
-		lastdata->can_dlc |= RX_THR;
+		/* do not send the saved data - only start throttle timer */
 		hrtimer_start(&op->thrtimer,
 			      ktime_add(op->kt_lastmsg, op->kt_ival2),
 			      HRTIMER_MODE_ABS);
@@ -458,7 +462,8 @@ static void bcm_rx_update_and_send(struct bcm_op *op,
 	}
 
 	/* the gap was that big, that throttling was not needed here */
-	bcm_rx_changed(op, rxdata);
+rx_changed_settime:
+	bcm_rx_changed(op, lastdata);
 	op->kt_lastmsg = ktime_get();
 }
 
@@ -467,7 +472,7 @@ static void bcm_rx_update_and_send(struct bcm_op *op,
  *                       received data stored in op->last_frames[]
  */
 static void bcm_rx_cmp_to_index(struct bcm_op *op, int index,
-				struct can_frame *rxdata)
+				const struct can_frame *rxdata)
 {
 	/*
 	 * no one uses the MSBs of can_dlc for comparation,
@@ -511,14 +516,12 @@ static void bcm_rx_starttimer(struct bcm_op *op)
 		hrtimer_start(&op->timer, op->kt_ival1, HRTIMER_MODE_REL);
 }
 
-/*
- * bcm_rx_timeout_handler - when the (cyclic) CAN frame receiption timed out
- */
-static enum hrtimer_restart bcm_rx_timeout_handler(struct hrtimer *hrtimer)
+static void bcm_rx_timeout_tsklet(unsigned long data)
 {
-	struct bcm_op *op = container_of(hrtimer, struct bcm_op, timer);
+	struct bcm_op *op = (struct bcm_op *)data;
 	struct bcm_msg_head msg_head;
 
+	/* create notification to user */
 	msg_head.opcode  = RX_TIMEOUT;
 	msg_head.flags   = op->flags;
 	msg_head.count   = op->count;
@@ -528,6 +531,17 @@ static enum hrtimer_restart bcm_rx_timeout_handler(struct hrtimer *hrtimer)
 	msg_head.nframes = 0;
 
 	bcm_send_to_user(op, &msg_head, NULL, 0);
+}
+
+/*
+ * bcm_rx_timeout_handler - when the (cyclic) CAN frame receiption timed out
+ */
+static enum hrtimer_restart bcm_rx_timeout_handler(struct hrtimer *hrtimer)
+{
+	struct bcm_op *op = container_of(hrtimer, struct bcm_op, timer);
+
+	/* schedule before NET_RX_SOFTIRQ */
+	tasklet_hi_schedule(&op->tsklet);
 
 	/* no restart of the timer is done here! */
 
@@ -541,9 +555,25 @@ static enum hrtimer_restart bcm_rx_timeout_handler(struct hrtimer *hrtimer)
 }
 
 /*
+ * bcm_rx_do_flush - helper for bcm_rx_thr_flush
+ */
+static inline int bcm_rx_do_flush(struct bcm_op *op, int update, int index)
+{
+	if ((op->last_frames) && (op->last_frames[index].can_dlc & RX_THR)) {
+		if (update)
+			bcm_rx_changed(op, &op->last_frames[index]);
+		return 1;
+	}
+	return 0;
+}
+
+/*
  * bcm_rx_thr_flush - Check for throttled data and send it to the userspace
+ *
+ * update == 0 : just check if throttled data is available  (any irq context)
+ * update == 1 : check and send throttled data to userspace (soft_irq context)
  */
-static int bcm_rx_thr_flush(struct bcm_op *op)
+static int bcm_rx_thr_flush(struct bcm_op *op, int update)
 {
 	int updated = 0;
 
@@ -551,27 +581,25 @@ static int bcm_rx_thr_flush(struct bcm_op *op)
 		int i;
 
 		/* for MUX filter we start at index 1 */
-		for (i = 1; i < op->nframes; i++) {
-			if ((op->last_frames) &&
-			    (op->last_frames[i].can_dlc & RX_THR)) {
-				op->last_frames[i].can_dlc &= ~RX_THR;
-				bcm_rx_changed(op, &op->last_frames[i]);
-				updated++;
-			}
-		}
+		for (i = 1; i < op->nframes; i++)
+			updated += bcm_rx_do_flush(op, update, i);
 
 	} else {
 		/* for RX_FILTER_ID and simple filter */
-		if (op->last_frames && (op->last_frames[0].can_dlc & RX_THR)) {
-			op->last_frames[0].can_dlc &= ~RX_THR;
-			bcm_rx_changed(op, &op->last_frames[0]);
-			updated++;
-		}
+		updated += bcm_rx_do_flush(op, update, 0);
 	}
 
 	return updated;
 }
 
+static void bcm_rx_thr_tsklet(unsigned long data)
+{
+	struct bcm_op *op = (struct bcm_op *)data;
+
+	/* push the changed data to the userspace */
+	bcm_rx_thr_flush(op, 1);
+}
+
 /*
  * bcm_rx_thr_handler - the time for blocked content updates is over now:
  *                      Check for throttled data and send it to the userspace
@@ -580,7 +608,9 @@ static enum hrtimer_restart bcm_rx_thr_handler(struct hrtimer *hrtimer)
 {
 	struct bcm_op *op = container_of(hrtimer, struct bcm_op, thrtimer);
 
-	if (bcm_rx_thr_flush(op)) {
+	tasklet_schedule(&op->thrtsklet);
+
+	if (bcm_rx_thr_flush(op, 0)) {
 		hrtimer_forward(hrtimer, ktime_get(), op->kt_ival2);
 		return HRTIMER_RESTART;
 	} else {
@@ -596,48 +626,38 @@ static enum hrtimer_restart bcm_rx_thr_handler(struct hrtimer *hrtimer)
 static void bcm_rx_handler(struct sk_buff *skb, void *data)
 {
 	struct bcm_op *op = (struct bcm_op *)data;
-	struct can_frame rxframe;
+	const struct can_frame *rxframe = (struct can_frame *)skb->data;
 	int i;
 
 	/* disable timeout */
 	hrtimer_cancel(&op->timer);
 
-	if (skb->len == sizeof(rxframe)) {
-		memcpy(&rxframe, skb->data, sizeof(rxframe));
-		/* save rx timestamp */
-		op->rx_stamp = skb->tstamp;
-		/* save originator for recvfrom() */
-		op->rx_ifindex = skb->dev->ifindex;
-		/* update statistics */
-		op->frames_abs++;
-		kfree_skb(skb);
+	if (op->can_id != rxframe->can_id)
+		goto rx_freeskb;
 
-	} else {
-		kfree_skb(skb);
-		return;
-	}
-
-	if (op->can_id != rxframe.can_id)
-		return;
+	/* save rx timestamp */
+	op->rx_stamp = skb->tstamp;
+	/* save originator for recvfrom() */
+	op->rx_ifindex = skb->dev->ifindex;
+	/* update statistics */
+	op->frames_abs++;
 
 	if (op->flags & RX_RTR_FRAME) {
 		/* send reply for RTR-request (placed in op->frames[0]) */
 		bcm_can_tx(op);
-		return;
+		goto rx_freeskb;
 	}
 
 	if (op->flags & RX_FILTER_ID) {
 		/* the easiest case */
-		bcm_rx_update_and_send(op, &op->last_frames[0], &rxframe);
-		bcm_rx_starttimer(op);
-		return;
+		bcm_rx_update_and_send(op, &op->last_frames[0], rxframe);
+		goto rx_freeskb_starttimer;
 	}
 
 	if (op->nframes == 1) {
 		/* simple compare with index 0 */
-		bcm_rx_cmp_to_index(op, 0, &rxframe);
-		bcm_rx_starttimer(op);
-		return;
+		bcm_rx_cmp_to_index(op, 0, rxframe);
+		goto rx_freeskb_starttimer;
 	}
 
 	if (op->nframes > 1) {
@@ -649,15 +669,19 @@ static void bcm_rx_handler(struct sk_buff *skb, void *data)
 		 */
 
 		for (i = 1; i < op->nframes; i++) {
-			if ((GET_U64(&op->frames[0]) & GET_U64(&rxframe)) ==
+			if ((GET_U64(&op->frames[0]) & GET_U64(rxframe)) ==
 			    (GET_U64(&op->frames[0]) &
 			     GET_U64(&op->frames[i]))) {
-				bcm_rx_cmp_to_index(op, i, &rxframe);
+				bcm_rx_cmp_to_index(op, i, rxframe);
 				break;
 			}
 		}
-		bcm_rx_starttimer(op);
 	}
+
+rx_freeskb_starttimer:
+	bcm_rx_starttimer(op);
+rx_freeskb:
+	kfree_skb(skb);
 }
 
 /*
@@ -681,6 +705,12 @@ static void bcm_remove_op(struct bcm_op *op)
 	hrtimer_cancel(&op->timer);
 	hrtimer_cancel(&op->thrtimer);
 
+	if (op->tsklet.func)
+		tasklet_kill(&op->tsklet);
+
+	if (op->thrtsklet.func)
+		tasklet_kill(&op->thrtsklet);
+
 	if ((op->frames) && (op->frames != &op->sframe))
 		kfree(op->frames);
 
@@ -891,6 +921,10 @@ static int bcm_tx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
 		hrtimer_init(&op->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 		op->timer.function = bcm_tx_timeout_handler;
 
+		/* initialize tasklet for tx countevent notification */
+		tasklet_init(&op->tsklet, bcm_tx_timeout_tsklet,
+			     (unsigned long) op);
+
 		/* currently unused in tx_ops */
 		hrtimer_init(&op->thrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 
@@ -1054,9 +1088,17 @@ static int bcm_rx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
 		hrtimer_init(&op->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 		op->timer.function = bcm_rx_timeout_handler;
 
+		/* initialize tasklet for rx timeout notification */
+		tasklet_init(&op->tsklet, bcm_rx_timeout_tsklet,
+			     (unsigned long) op);
+
 		hrtimer_init(&op->thrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 		op->thrtimer.function = bcm_rx_thr_handler;
 
+		/* initialize tasklet for rx throttle handling */
+		tasklet_init(&op->thrtsklet, bcm_rx_thr_tsklet,
+			     (unsigned long) op);
+
 		/* add this bcm_op to the list of the rx_ops */
 		list_add(&op->list, &bo->rx_ops);
 
@@ -1102,7 +1144,7 @@ static int bcm_rx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
 			 */
 			op->kt_lastmsg = ktime_set(0, 0);
 			hrtimer_cancel(&op->thrtimer);
-			bcm_rx_thr_flush(op);
+			bcm_rx_thr_flush(op, 1);
 		}
 
 		if ((op->flags & STARTTIMER) && op->kt_ival1.tv64)
diff --git a/net/core/dev.c b/net/core/dev.c
index 09c66a449da6..382df6c09eec 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -132,6 +132,9 @@
 /* Instead of increasing this, you should create a hash table. */
 #define MAX_GRO_SKBS 8
 
+/* This should be increased if a protocol with a bigger head is added. */
+#define GRO_MAX_HEAD (MAX_HEADER + 128)
+
 /*
  *	The list of packet types we will receive (as opposed to discard)
  *	and the routines to invoke.
@@ -2345,7 +2348,7 @@ static int napi_gro_complete(struct sk_buff *skb)
 	struct list_head *head = &ptype_base[ntohs(type) & PTYPE_HASH_MASK];
 	int err = -ENOENT;
 
-	if (!skb_shinfo(skb)->frag_list)
+	if (NAPI_GRO_CB(skb)->count == 1)
 		goto out;
 
 	rcu_read_lock();
@@ -2365,6 +2368,7 @@ static int napi_gro_complete(struct sk_buff *skb)
 	}
 
 out:
+	skb_shinfo(skb)->gso_size = 0;
 	__skb_push(skb, -skb_network_offset(skb));
 	return netif_receive_skb(skb);
 }
@@ -2383,7 +2387,7 @@ void napi_gro_flush(struct napi_struct *napi)
 }
 EXPORT_SYMBOL(napi_gro_flush);
 
-int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
+static int __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 {
 	struct sk_buff **pp = NULL;
 	struct packet_type *ptype;
@@ -2392,6 +2396,7 @@ int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 	int count = 0;
 	int same_flow;
 	int mac_len;
+	int free;
 
 	if (!(skb->dev->features & NETIF_F_GRO))
 		goto normal;
@@ -2408,6 +2413,7 @@ int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 		skb->mac_len = mac_len;
 		NAPI_GRO_CB(skb)->same_flow = 0;
 		NAPI_GRO_CB(skb)->flush = 0;
+		NAPI_GRO_CB(skb)->free = 0;
 
 		for (p = napi->gro_list; p; p = p->next) {
 			count++;
@@ -2427,6 +2433,7 @@ int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 		goto normal;
 
 	same_flow = NAPI_GRO_CB(skb)->same_flow;
+	free = NAPI_GRO_CB(skb)->free;
 
 	if (pp) {
 		struct sk_buff *nskb = *pp;
@@ -2446,17 +2453,91 @@ int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 	}
 
 	NAPI_GRO_CB(skb)->count = 1;
+	skb_shinfo(skb)->gso_size = skb->len;
 	skb->next = napi->gro_list;
 	napi->gro_list = skb;
 
 ok:
-	return NET_RX_SUCCESS;
+	return free;
 
 normal:
-	return netif_receive_skb(skb);
+	return -1;
+}
+
+int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
+{
+	switch (__napi_gro_receive(napi, skb)) {
+	case -1:
+		return netif_receive_skb(skb);
+
+	case 1:
+		kfree_skb(skb);
+		break;
+	}
+
+	return NET_RX_SUCCESS;
 }
 EXPORT_SYMBOL(napi_gro_receive);
 
+int napi_gro_frags(struct napi_struct *napi, struct napi_gro_fraginfo *info)
+{
+	struct net_device *dev = napi->dev;
+	struct sk_buff *skb = napi->skb;
+	int err = NET_RX_DROP;
+
+	napi->skb = NULL;
+
+	if (!skb) {
+		skb = netdev_alloc_skb(dev, GRO_MAX_HEAD + NET_IP_ALIGN);
+		if (!skb)
+			goto out;
+
+		skb_reserve(skb, NET_IP_ALIGN);
+	}
+
+	BUG_ON(info->nr_frags > MAX_SKB_FRAGS);
+	skb_shinfo(skb)->nr_frags = info->nr_frags;
+	memcpy(skb_shinfo(skb)->frags, info->frags, sizeof(info->frags));
+
+	skb->data_len = info->len;
+	skb->len += info->len;
+	skb->truesize += info->len;
+
+	if (!pskb_may_pull(skb, ETH_HLEN))
+		goto reuse;
+
+	err = NET_RX_SUCCESS;
+
+	skb->protocol = eth_type_trans(skb, dev);
+
+	skb->ip_summed = info->ip_summed;
+	skb->csum = info->csum;
+
+	switch (__napi_gro_receive(napi, skb)) {
+	case -1:
+		return netif_receive_skb(skb);
+
+	case 0:
+		goto out;
+	}
+
+reuse:
+	skb_shinfo(skb)->nr_frags = 0;
+
+	skb->len -= skb->data_len;
+	skb->truesize -= skb->data_len;
+	skb->data_len = 0;
+
+	__skb_pull(skb, skb_headlen(skb));
+	skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb));
+
+	napi->skb = skb;
+
+out:
+	return err;
+}
+EXPORT_SYMBOL(napi_gro_frags);
+
 static int process_backlog(struct napi_struct *napi, int quota)
 {
 	int work = 0;
@@ -2535,11 +2616,12 @@ void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
 {
 	INIT_LIST_HEAD(&napi->poll_list);
 	napi->gro_list = NULL;
+	napi->skb = NULL;
 	napi->poll = poll;
 	napi->weight = weight;
 	list_add(&napi->dev_list, &dev->napi_list);
-#ifdef CONFIG_NETPOLL
 	napi->dev = dev;
+#ifdef CONFIG_NETPOLL
 	spin_lock_init(&napi->poll_lock);
 	napi->poll_owner = -1;
 #endif
@@ -2552,6 +2634,7 @@ void netif_napi_del(struct napi_struct *napi)
 	struct sk_buff *skb, *next;
 
 	list_del_init(&napi->dev_list);
+	kfree(napi->skb);
 
 	for (skb = napi->gro_list; skb; skb = next) {
 		next = skb->next;
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index b8d0abb26433..5110b359c758 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2594,6 +2594,17 @@ int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb)
 
 	if (skb_shinfo(p)->frag_list)
 		goto merge;
+	else if (!skb_headlen(p) && !skb_headlen(skb) &&
+		 skb_shinfo(p)->nr_frags + skb_shinfo(skb)->nr_frags <
+		 MAX_SKB_FRAGS) {
+		memcpy(skb_shinfo(p)->frags + skb_shinfo(p)->nr_frags,
+		       skb_shinfo(skb)->frags,
+		       skb_shinfo(skb)->nr_frags * sizeof(skb_frag_t));
+
+		skb_shinfo(p)->nr_frags += skb_shinfo(skb)->nr_frags;
+		NAPI_GRO_CB(skb)->free = 1;
+		goto done;
+	}
 
 	headroom = skb_headroom(p);
 	nskb = netdev_alloc_skb(p->dev, headroom);
@@ -2613,6 +2624,7 @@ int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb)
 
 	*NAPI_GRO_CB(nskb) = *NAPI_GRO_CB(p);
 	skb_shinfo(nskb)->frag_list = p;
+	skb_shinfo(nskb)->gso_size = skb_shinfo(p)->gso_size;
 	skb_header_release(p);
 	nskb->prev = p;
 
@@ -2627,11 +2639,12 @@ int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb)
 	p = nskb;
 
 merge:
-	NAPI_GRO_CB(p)->count++;
 	p->prev->next = skb;
 	p->prev = skb;
 	skb_header_release(skb);
 
+done:
+	NAPI_GRO_CB(p)->count++;
 	p->data_len += skb->len;
 	p->truesize += skb->len;
 	p->len += skb->len;
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index 5dbfe5fdc0d6..8379496de82b 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -191,7 +191,7 @@ static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
 	return 0;
 nlmsg_failure:
 err:
-	kfree(dcbnl_skb);
+	kfree_skb(dcbnl_skb);
 	return ret;
 }
 
@@ -272,7 +272,7 @@ static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
 	return 0;
 nlmsg_failure:
 err:
-	kfree(dcbnl_skb);
+	kfree_skb(dcbnl_skb);
 err_out:
 	return -EINVAL;
 }
@@ -314,7 +314,7 @@ static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
 
 nlmsg_failure:
 err:
-	kfree(dcbnl_skb);
+	kfree_skb(dcbnl_skb);
 err_out:
 	return -EINVAL;
 }
@@ -380,7 +380,7 @@ static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
 	return 0;
 nlmsg_failure:
 err:
-	kfree(dcbnl_skb);
+	kfree_skb(dcbnl_skb);
 err_out:
 	return -EINVAL;
 }
@@ -458,7 +458,7 @@ static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
 	return 0;
 nlmsg_failure:
 err:
-	kfree(dcbnl_skb);
+	kfree_skb(dcbnl_skb);
 err_out:
 	return ret;
 }
@@ -687,7 +687,7 @@ err_pg:
 	nla_nest_cancel(dcbnl_skb, pg_nest);
 nlmsg_failure:
 err:
-	kfree(dcbnl_skb);
+	kfree_skb(dcbnl_skb);
 err_out:
 	ret  = -EINVAL;
 	return ret;
@@ -949,7 +949,7 @@ err_bcn:
 	nla_nest_cancel(dcbnl_skb, bcn_nest);
 nlmsg_failure:
 err:
-	kfree(dcbnl_skb);
+	kfree_skb(dcbnl_skb);
 err_out:
 	ret  = -EINVAL;
 	return ret;
diff --git a/net/dccp/Kconfig b/net/dccp/Kconfig
index 7aa2a7acc7ec..ad6dffd9070e 100644
--- a/net/dccp/Kconfig
+++ b/net/dccp/Kconfig
@@ -1,7 +1,6 @@
 menuconfig IP_DCCP
 	tristate "The DCCP Protocol (EXPERIMENTAL)"
 	depends on INET && EXPERIMENTAL
-	select IP_DCCP_CCID2
 	---help---
 	  Datagram Congestion Control Protocol (RFC 4340)
 
@@ -25,9 +24,6 @@ config INET_DCCP_DIAG
 	def_tristate y if (IP_DCCP = y && INET_DIAG = y)
 	def_tristate m
 
-config IP_DCCP_ACKVEC
-	bool
-
 source "net/dccp/ccids/Kconfig"
 
 menu "DCCP Kernel Hacking"
diff --git a/net/dccp/Makefile b/net/dccp/Makefile
index f4f8793aafff..2991efcc8dea 100644
--- a/net/dccp/Makefile
+++ b/net/dccp/Makefile
@@ -2,14 +2,23 @@ obj-$(CONFIG_IP_DCCP) += dccp.o dccp_ipv4.o
 
 dccp-y := ccid.o feat.o input.o minisocks.o options.o output.o proto.o timer.o
 
+#
+# CCID algorithms to be used by dccp.ko
+#
+# CCID-2 is default (RFC 4340, p. 77) and has Ack Vectors as dependency
+dccp-y += ccids/ccid2.o ackvec.o
+dccp-$(CONFIG_IP_DCCP_CCID3)	+= ccids/ccid3.o
+dccp-$(CONFIG_IP_DCCP_TFRC_LIB) += ccids/lib/tfrc.o		\
+				   ccids/lib/tfrc_equation.o	\
+				   ccids/lib/packet_history.o	\
+				   ccids/lib/loss_interval.o
+
 dccp_ipv4-y := ipv4.o
 
 # build dccp_ipv6 as module whenever either IPv6 or DCCP is a module
 obj-$(subst y,$(CONFIG_IP_DCCP),$(CONFIG_IPV6)) += dccp_ipv6.o
 dccp_ipv6-y := ipv6.o
 
-dccp-$(CONFIG_IP_DCCP_ACKVEC) += ackvec.o
-
 obj-$(CONFIG_INET_DCCP_DIAG) += dccp_diag.o
 obj-$(CONFIG_NET_DCCPPROBE) += dccp_probe.o
 
@@ -17,5 +26,3 @@ dccp-$(CONFIG_SYSCTL) += sysctl.o
 
 dccp_diag-y := diag.o
 dccp_probe-y := probe.o
-
-obj-y += ccids/
diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h
index 4ccee030524e..45f95e55f873 100644
--- a/net/dccp/ackvec.h
+++ b/net/dccp/ackvec.h
@@ -84,7 +84,6 @@ struct dccp_ackvec_record {
 struct sock;
 struct sk_buff;
 
-#ifdef CONFIG_IP_DCCP_ACKVEC
 extern int dccp_ackvec_init(void);
 extern void dccp_ackvec_exit(void);
 
@@ -106,52 +105,4 @@ static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
 {
 	return av->av_vec_len;
 }
-#else /* CONFIG_IP_DCCP_ACKVEC */
-static inline int dccp_ackvec_init(void)
-{
-	return 0;
-}
-
-static inline void dccp_ackvec_exit(void)
-{
-}
-
-static inline struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority)
-{
-	return NULL;
-}
-
-static inline void dccp_ackvec_free(struct dccp_ackvec *av)
-{
-}
-
-static inline int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
-				  const u64 ackno, const u8 state)
-{
-	return -1;
-}
-
-static inline void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av,
-					       struct sock *sk, const u64 ackno)
-{
-}
-
-static inline int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
-				    const u64 *ackno, const u8 opt,
-				    const u8 *value, const u8 len)
-{
-	return -1;
-}
-
-static inline int dccp_insert_option_ackvec(const struct sock *sk,
-					    const struct sk_buff *skb)
-{
-	return -1;
-}
-
-static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
-{
-	return 0;
-}
-#endif /* CONFIG_IP_DCCP_ACKVEC */
 #endif /* _ACKVEC_H */
diff --git a/net/dccp/ccid.c b/net/dccp/ccid.c
index bcc643f992ae..f3e9ba1cfd01 100644
--- a/net/dccp/ccid.c
+++ b/net/dccp/ccid.c
@@ -12,56 +12,70 @@
  */
 
 #include "ccid.h"
+#include "ccids/lib/tfrc.h"
 
-static u8 builtin_ccids[] = {
-	DCCPC_CCID2,		/* CCID2 is supported by default */
-#if defined(CONFIG_IP_DCCP_CCID3) || defined(CONFIG_IP_DCCP_CCID3_MODULE)
-	DCCPC_CCID3,
+static struct ccid_operations *ccids[] = {
+	&ccid2_ops,
+#ifdef CONFIG_IP_DCCP_CCID3
+	&ccid3_ops,
 #endif
 };
 
-static struct ccid_operations *ccids[CCID_MAX];
-#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT)
-static atomic_t ccids_lockct = ATOMIC_INIT(0);
-static DEFINE_SPINLOCK(ccids_lock);
-
-/*
- * The strategy is: modifications ccids vector are short, do not sleep and
- * veeery rare, but read access should be free of any exclusive locks.
- */
-static void ccids_write_lock(void)
+static struct ccid_operations *ccid_by_number(const u8 id)
 {
-	spin_lock(&ccids_lock);
-	while (atomic_read(&ccids_lockct) != 0) {
-		spin_unlock(&ccids_lock);
-		yield();
-		spin_lock(&ccids_lock);
-	}
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ccids); i++)
+		if (ccids[i]->ccid_id == id)
+			return ccids[i];
+	return NULL;
 }
 
-static inline void ccids_write_unlock(void)
+/* check that up to @array_len members in @ccid_array are supported */
+bool ccid_support_check(u8 const *ccid_array, u8 array_len)
 {
-	spin_unlock(&ccids_lock);
+	while (array_len > 0)
+		if (ccid_by_number(ccid_array[--array_len]) == NULL)
+			return false;
+	return true;
 }
 
-static inline void ccids_read_lock(void)
+/**
+ * ccid_get_builtin_ccids  -  Populate a list of built-in CCIDs
+ * @ccid_array: pointer to copy into
+ * @array_len: value to return length into
+ * This function allocates memory - caller must see that it is freed after use.
+ */
+int ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len)
 {
-	atomic_inc(&ccids_lockct);
-	smp_mb__after_atomic_inc();
-	spin_unlock_wait(&ccids_lock);
+	*ccid_array = kmalloc(ARRAY_SIZE(ccids), gfp_any());
+	if (*ccid_array == NULL)
+		return -ENOBUFS;
+
+	for (*array_len = 0; *array_len < ARRAY_SIZE(ccids); *array_len += 1)
+		(*ccid_array)[*array_len] = ccids[*array_len]->ccid_id;
+	return 0;
 }
 
-static inline void ccids_read_unlock(void)
+int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
+				  char __user *optval, int __user *optlen)
 {
-	atomic_dec(&ccids_lockct);
-}
+	u8 *ccid_array, array_len;
+	int err = 0;
 
-#else
-#define ccids_write_lock() do { } while(0)
-#define ccids_write_unlock() do { } while(0)
-#define ccids_read_lock() do { } while(0)
-#define ccids_read_unlock() do { } while(0)
-#endif
+	if (len < ARRAY_SIZE(ccids))
+		return -EINVAL;
+
+	if (ccid_get_builtin_ccids(&ccid_array, &array_len))
+		return -ENOBUFS;
+
+	if (put_user(array_len, optlen) ||
+	    copy_to_user(optval, ccid_array, array_len))
+		err = -EFAULT;
+
+	kfree(ccid_array);
+	return err;
+}
 
 static struct kmem_cache *ccid_kmem_cache_create(int obj_size, const char *fmt,...)
 {
@@ -93,48 +107,7 @@ static void ccid_kmem_cache_destroy(struct kmem_cache *slab)
 	}
 }
 
-/* check that up to @array_len members in @ccid_array are supported */
-bool ccid_support_check(u8 const *ccid_array, u8 array_len)
-{
-	u8 i, j, found;
-
-	for (i = 0, found = 0; i < array_len; i++, found = 0) {
-		for (j = 0; !found && j < ARRAY_SIZE(builtin_ccids); j++)
-			found = (ccid_array[i] == builtin_ccids[j]);
-		if (!found)
-			return false;
-	}
-	return true;
-}
-
-/**
- * ccid_get_builtin_ccids  -  Provide copy of `builtin' CCID array
- * @ccid_array: pointer to copy into
- * @array_len: value to return length into
- * This function allocates memory - caller must see that it is freed after use.
- */
-int ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len)
-{
-	*ccid_array = kmemdup(builtin_ccids, sizeof(builtin_ccids), gfp_any());
-	if (*ccid_array == NULL)
-		return -ENOBUFS;
-	*array_len = ARRAY_SIZE(builtin_ccids);
-	return 0;
-}
-
-int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
-				    char __user *optval, int __user *optlen)
-{
-	if (len < sizeof(builtin_ccids))
-		return -EINVAL;
-
-	if (put_user(sizeof(builtin_ccids), optlen) ||
-	    copy_to_user(optval, builtin_ccids, sizeof(builtin_ccids)))
-		return -EFAULT;
-	return 0;
-}
-
-int ccid_register(struct ccid_operations *ccid_ops)
+static int ccid_activate(struct ccid_operations *ccid_ops)
 {
 	int err = -ENOBUFS;
 
@@ -152,79 +125,40 @@ int ccid_register(struct ccid_operations *ccid_ops)
 	if (ccid_ops->ccid_hc_tx_slab == NULL)
 		goto out_free_rx_slab;
 
-	ccids_write_lock();
-	err = -EEXIST;
-	if (ccids[ccid_ops->ccid_id] == NULL) {
-		ccids[ccid_ops->ccid_id] = ccid_ops;
-		err = 0;
-	}
-	ccids_write_unlock();
-	if (err != 0)
-		goto out_free_tx_slab;
-
-	pr_info("CCID: Registered CCID %d (%s)\n",
+	pr_info("CCID: Activated CCID %d (%s)\n",
 		ccid_ops->ccid_id, ccid_ops->ccid_name);
+	err = 0;
 out:
 	return err;
-out_free_tx_slab:
-	ccid_kmem_cache_destroy(ccid_ops->ccid_hc_tx_slab);
-	ccid_ops->ccid_hc_tx_slab = NULL;
-	goto out;
 out_free_rx_slab:
 	ccid_kmem_cache_destroy(ccid_ops->ccid_hc_rx_slab);
 	ccid_ops->ccid_hc_rx_slab = NULL;
 	goto out;
 }
 
-EXPORT_SYMBOL_GPL(ccid_register);
-
-int ccid_unregister(struct ccid_operations *ccid_ops)
+static void ccid_deactivate(struct ccid_operations *ccid_ops)
 {
-	ccids_write_lock();
-	ccids[ccid_ops->ccid_id] = NULL;
-	ccids_write_unlock();
-
 	ccid_kmem_cache_destroy(ccid_ops->ccid_hc_tx_slab);
 	ccid_ops->ccid_hc_tx_slab = NULL;
 	ccid_kmem_cache_destroy(ccid_ops->ccid_hc_rx_slab);
 	ccid_ops->ccid_hc_rx_slab = NULL;
 
-	pr_info("CCID: Unregistered CCID %d (%s)\n",
+	pr_info("CCID: Deactivated CCID %d (%s)\n",
 		ccid_ops->ccid_id, ccid_ops->ccid_name);
-	return 0;
 }
 
-EXPORT_SYMBOL_GPL(ccid_unregister);
-
-struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx, gfp_t gfp)
+struct ccid *ccid_new(const u8 id, struct sock *sk, bool rx)
 {
-	struct ccid_operations *ccid_ops;
+	struct ccid_operations *ccid_ops = ccid_by_number(id);
 	struct ccid *ccid = NULL;
 
-	ccids_read_lock();
-#ifdef CONFIG_MODULES
-	if (ccids[id] == NULL) {
-		/* We only try to load if in process context */
-		ccids_read_unlock();
-		if (gfp & GFP_ATOMIC)
-			goto out;
-		request_module("net-dccp-ccid-%d", id);
-		ccids_read_lock();
-	}
-#endif
-	ccid_ops = ccids[id];
 	if (ccid_ops == NULL)
-		goto out_unlock;
-
-	if (!try_module_get(ccid_ops->ccid_owner))
-		goto out_unlock;
-
-	ccids_read_unlock();
+		goto out;
 
 	ccid = kmem_cache_alloc(rx ? ccid_ops->ccid_hc_rx_slab :
-				     ccid_ops->ccid_hc_tx_slab, gfp);
+				     ccid_ops->ccid_hc_tx_slab, gfp_any());
 	if (ccid == NULL)
-		goto out_module_put;
+		goto out;
 	ccid->ccid_ops = ccid_ops;
 	if (rx) {
 		memset(ccid + 1, 0, ccid_ops->ccid_hc_rx_obj_size);
@@ -239,53 +173,57 @@ struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx, gfp_t gfp)
 	}
 out:
 	return ccid;
-out_unlock:
-	ccids_read_unlock();
-	goto out;
 out_free_ccid:
 	kmem_cache_free(rx ? ccid_ops->ccid_hc_rx_slab :
 			ccid_ops->ccid_hc_tx_slab, ccid);
 	ccid = NULL;
-out_module_put:
-	module_put(ccid_ops->ccid_owner);
 	goto out;
 }
 
-EXPORT_SYMBOL_GPL(ccid_new);
-
-static void ccid_delete(struct ccid *ccid, struct sock *sk, int rx)
+void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk)
 {
-	struct ccid_operations *ccid_ops;
-
-	if (ccid == NULL)
-		return;
-
-	ccid_ops = ccid->ccid_ops;
-	if (rx) {
-		if (ccid_ops->ccid_hc_rx_exit != NULL)
-			ccid_ops->ccid_hc_rx_exit(sk);
-		kmem_cache_free(ccid_ops->ccid_hc_rx_slab,  ccid);
-	} else {
-		if (ccid_ops->ccid_hc_tx_exit != NULL)
-			ccid_ops->ccid_hc_tx_exit(sk);
-		kmem_cache_free(ccid_ops->ccid_hc_tx_slab,  ccid);
+	if (ccid != NULL) {
+		if (ccid->ccid_ops->ccid_hc_rx_exit != NULL)
+			ccid->ccid_ops->ccid_hc_rx_exit(sk);
+		kmem_cache_free(ccid->ccid_ops->ccid_hc_rx_slab, ccid);
 	}
-	ccids_read_lock();
-	if (ccids[ccid_ops->ccid_id] != NULL)
-		module_put(ccid_ops->ccid_owner);
-	ccids_read_unlock();
 }
 
-void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk)
+void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk)
 {
-	ccid_delete(ccid, sk, 1);
+	if (ccid != NULL) {
+		if (ccid->ccid_ops->ccid_hc_tx_exit != NULL)
+			ccid->ccid_ops->ccid_hc_tx_exit(sk);
+		kmem_cache_free(ccid->ccid_ops->ccid_hc_tx_slab, ccid);
+	}
 }
 
-EXPORT_SYMBOL_GPL(ccid_hc_rx_delete);
-
-void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk)
+int __init ccid_initialize_builtins(void)
 {
-	ccid_delete(ccid, sk, 0);
+	int i, err = tfrc_lib_init();
+
+	if (err)
+		return err;
+
+	for (i = 0; i < ARRAY_SIZE(ccids); i++) {
+		err = ccid_activate(ccids[i]);
+		if (err)
+			goto unwind_registrations;
+	}
+	return 0;
+
+unwind_registrations:
+	while(--i >= 0)
+		ccid_deactivate(ccids[i]);
+	tfrc_lib_exit();
+	return err;
 }
 
-EXPORT_SYMBOL_GPL(ccid_hc_tx_delete);
+void ccid_cleanup_builtins(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ccids); i++)
+		ccid_deactivate(ccids[i]);
+	tfrc_lib_exit();
+}
diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
index 18f69423a708..facedd20b531 100644
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -29,7 +29,6 @@ struct tcp_info;
  *  @ccid_id: numerical CCID ID (up to %CCID_MAX, cf. table 5 in RFC 4340, 10.)
  *  @ccid_ccmps: the CCMPS including network/transport headers (0 when disabled)
  *  @ccid_name: alphabetical identifier string for @ccid_id
- *  @ccid_owner: module which implements/owns this CCID
  *  @ccid_hc_{r,t}x_slab: memory pool for the receiver/sender half-connection
  *  @ccid_hc_{r,t}x_obj_size: size of the receiver/sender half-connection socket
  *
@@ -48,7 +47,6 @@ struct ccid_operations {
 	unsigned char		ccid_id;
 	__u32			ccid_ccmps;
 	const char		*ccid_name;
-	struct module		*ccid_owner;
 	struct kmem_cache	*ccid_hc_rx_slab,
 				*ccid_hc_tx_slab;
 	__u32			ccid_hc_rx_obj_size,
@@ -90,8 +88,13 @@ struct ccid_operations {
 						 int __user *optlen);
 };
 
-extern int ccid_register(struct ccid_operations *ccid_ops);
-extern int ccid_unregister(struct ccid_operations *ccid_ops);
+extern struct ccid_operations ccid2_ops;
+#ifdef CONFIG_IP_DCCP_CCID3
+extern struct ccid_operations ccid3_ops;
+#endif
+
+extern int  ccid_initialize_builtins(void);
+extern void ccid_cleanup_builtins(void);
 
 struct ccid {
 	struct ccid_operations *ccid_ops;
@@ -108,8 +111,7 @@ extern int  ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len);
 extern int  ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
 					  char __user *, int __user *);
 
-extern struct ccid *ccid_new(unsigned char id, struct sock *sk, int rx,
-			     gfp_t gfp);
+extern struct ccid *ccid_new(const u8 id, struct sock *sk, bool rx);
 
 static inline int ccid_get_current_rx_ccid(struct dccp_sock *dp)
 {
diff --git a/net/dccp/ccids/Kconfig b/net/dccp/ccids/Kconfig
index 12275943eab8..b28bf962edc3 100644
--- a/net/dccp/ccids/Kconfig
+++ b/net/dccp/ccids/Kconfig
@@ -1,80 +1,51 @@
 menu "DCCP CCIDs Configuration (EXPERIMENTAL)"
 	depends on EXPERIMENTAL
 
-config IP_DCCP_CCID2
-	tristate "CCID2 (TCP-Like) (EXPERIMENTAL)"
-	def_tristate IP_DCCP
-	select IP_DCCP_ACKVEC
-	---help---
-	  CCID 2, TCP-like Congestion Control, denotes Additive Increase,
-	  Multiplicative Decrease (AIMD) congestion control with behavior
-	  modelled directly on TCP, including congestion window, slow start,
-	  timeouts, and so forth [RFC 2581].  CCID 2 achieves maximum
-	  bandwidth over the long term, consistent with the use of end-to-end
-	  congestion control, but halves its congestion window in response to
-	  each congestion event.  This leads to the abrupt rate changes
-	  typical of TCP.  Applications should use CCID 2 if they prefer
-	  maximum bandwidth utilization to steadiness of rate.  This is often
-	  the case for applications that are not playing their data directly
-	  to the user.  For example, a hypothetical application that
-	  transferred files over DCCP, using application-level retransmissions
-	  for lost packets, would prefer CCID 2 to CCID 3.  On-line games may
-	  also prefer CCID 2.  See RFC 4341 for further details.
-
-	  CCID2 is the default CCID used by DCCP.
-
 config IP_DCCP_CCID2_DEBUG
-	  bool "CCID2 debugging messages"
-	  depends on IP_DCCP_CCID2
-	  ---help---
-	    Enable CCID2-specific debugging messages.
+	bool "CCID-2 debugging messages"
+	---help---
+	  Enable CCID-2 specific debugging messages.
 
-	    When compiling CCID2 as a module, this debugging output can
-	    additionally be toggled by setting the ccid2_debug module
-	    parameter to 0 or 1.
+	  The debugging output can additionally be toggled by setting the
+	  ccid2_debug parameter to 0 or 1.
 
-	    If in doubt, say N.
+	  If in doubt, say N.
 
 config IP_DCCP_CCID3
-	tristate "CCID3 (TCP-Friendly) (EXPERIMENTAL)"
-	def_tristate IP_DCCP
-	select IP_DCCP_TFRC_LIB
+	bool "CCID-3 (TCP-Friendly) (EXPERIMENTAL)"
+	def_bool y if (IP_DCCP = y || IP_DCCP = m)
 	---help---
-	  CCID 3 denotes TCP-Friendly Rate Control (TFRC), an equation-based
+	  CCID-3 denotes TCP-Friendly Rate Control (TFRC), an equation-based
 	  rate-controlled congestion control mechanism.  TFRC is designed to
 	  be reasonably fair when competing for bandwidth with TCP-like flows,
 	  where a flow is "reasonably fair" if its sending rate is generally
 	  within a factor of two of the sending rate of a TCP flow under the
 	  same conditions.  However, TFRC has a much lower variation of
-	  throughput over time compared with TCP, which makes CCID 3 more
-	  suitable than CCID 2 for applications such streaming media where a
+	  throughput over time compared with TCP, which makes CCID-3 more
+	  suitable than CCID-2 for applications such streaming media where a
 	  relatively smooth sending rate is of importance.
 
-	  CCID 3 is further described in RFC 4342,
+	  CCID-3 is further described in RFC 4342,
 	  http://www.ietf.org/rfc/rfc4342.txt
 
 	  The TFRC congestion control algorithms were initially described in
-	  RFC 3448.
+	  RFC 5448.
 
 	  This text was extracted from RFC 4340 (sec. 10.2),
 	  http://www.ietf.org/rfc/rfc4340.txt
-	  
-	  To compile this CCID as a module, choose M here: the module will be
-	  called dccp_ccid3.
 
-	  If in doubt, say M.
+	  If in doubt, say N.
 
 config IP_DCCP_CCID3_DEBUG
-	  bool "CCID3 debugging messages"
-	  depends on IP_DCCP_CCID3
-	  ---help---
-	    Enable CCID3-specific debugging messages.
+	bool "CCID-3 debugging messages"
+	depends on IP_DCCP_CCID3
+	---help---
+	  Enable CCID-3 specific debugging messages.
 
-	    When compiling CCID3 as a module, this debugging output can
-	    additionally be toggled by setting the ccid3_debug module
-	    parameter to 0 or 1.
+	  The debugging output can additionally be toggled by setting the
+	  ccid3_debug parameter to 0 or 1.
 
-	    If in doubt, say N.
+	  If in doubt, say N.
 
 config IP_DCCP_CCID3_RTO
 	  int "Use higher bound for nofeedback timer"
@@ -108,12 +79,8 @@ config IP_DCCP_CCID3_RTO
 	    therefore not be performed on WANs.
 
 config IP_DCCP_TFRC_LIB
-	tristate
-	default n
+	def_bool y if IP_DCCP_CCID3
 
 config IP_DCCP_TFRC_DEBUG
-	bool
-	depends on IP_DCCP_TFRC_LIB
-	default y if IP_DCCP_CCID3_DEBUG
-
+	def_bool y if IP_DCCP_CCID3_DEBUG
 endmenu
diff --git a/net/dccp/ccids/Makefile b/net/dccp/ccids/Makefile
deleted file mode 100644
index 438f20bccff7..000000000000
--- a/net/dccp/ccids/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-obj-$(CONFIG_IP_DCCP_CCID3) += dccp_ccid3.o
-
-dccp_ccid3-y := ccid3.o
-
-obj-$(CONFIG_IP_DCCP_CCID2) += dccp_ccid2.o
-
-dccp_ccid2-y := ccid2.o
-
-obj-y += lib/
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index c9ea19a4d85e..d235294ace23 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -768,10 +768,9 @@ static void ccid2_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
 	}
 }
 
-static struct ccid_operations ccid2 = {
+struct ccid_operations ccid2_ops = {
 	.ccid_id		= DCCPC_CCID2,
 	.ccid_name		= "TCP-like",
-	.ccid_owner		= THIS_MODULE,
 	.ccid_hc_tx_obj_size	= sizeof(struct ccid2_hc_tx_sock),
 	.ccid_hc_tx_init	= ccid2_hc_tx_init,
 	.ccid_hc_tx_exit	= ccid2_hc_tx_exit,
@@ -784,22 +783,5 @@ static struct ccid_operations ccid2 = {
 
 #ifdef CONFIG_IP_DCCP_CCID2_DEBUG
 module_param(ccid2_debug, bool, 0644);
-MODULE_PARM_DESC(ccid2_debug, "Enable debug messages");
+MODULE_PARM_DESC(ccid2_debug, "Enable CCID-2 debug messages");
 #endif
-
-static __init int ccid2_module_init(void)
-{
-	return ccid_register(&ccid2);
-}
-module_init(ccid2_module_init);
-
-static __exit void ccid2_module_exit(void)
-{
-	ccid_unregister(&ccid2);
-}
-module_exit(ccid2_module_exit);
-
-MODULE_AUTHOR("Andrea Bittau <a.bittau@cs.ucl.ac.uk>");
-MODULE_DESCRIPTION("DCCP TCP-Like (CCID2) CCID");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("net-dccp-ccid-2");
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 3b8bd7ca6761..a27b7f4c19c5 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -940,10 +940,9 @@ static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len,
 	return 0;
 }
 
-static struct ccid_operations ccid3 = {
+struct ccid_operations ccid3_ops = {
 	.ccid_id		   = DCCPC_CCID3,
 	.ccid_name		   = "TCP-Friendly Rate Control",
-	.ccid_owner		   = THIS_MODULE,
 	.ccid_hc_tx_obj_size	   = sizeof(struct ccid3_hc_tx_sock),
 	.ccid_hc_tx_init	   = ccid3_hc_tx_init,
 	.ccid_hc_tx_exit	   = ccid3_hc_tx_exit,
@@ -964,23 +963,5 @@ static struct ccid_operations ccid3 = {
 
 #ifdef CONFIG_IP_DCCP_CCID3_DEBUG
 module_param(ccid3_debug, bool, 0644);
-MODULE_PARM_DESC(ccid3_debug, "Enable debug messages");
+MODULE_PARM_DESC(ccid3_debug, "Enable CCID-3 debug messages");
 #endif
-
-static __init int ccid3_module_init(void)
-{
-	return ccid_register(&ccid3);
-}
-module_init(ccid3_module_init);
-
-static __exit void ccid3_module_exit(void)
-{
-	ccid_unregister(&ccid3);
-}
-module_exit(ccid3_module_exit);
-
-MODULE_AUTHOR("Ian McDonald <ian.mcdonald@jandi.co.nz>, "
-	      "Arnaldo Carvalho de Melo <acme@ghostprotocols.net>");
-MODULE_DESCRIPTION("DCCP TFRC CCID3 CCID");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("net-dccp-ccid-3");
diff --git a/net/dccp/ccids/lib/Makefile b/net/dccp/ccids/lib/Makefile
deleted file mode 100644
index 68c93e3d89dc..000000000000
--- a/net/dccp/ccids/lib/Makefile
+++ /dev/null
@@ -1,3 +0,0 @@
-obj-$(CONFIG_IP_DCCP_TFRC_LIB) += dccp_tfrc_lib.o
-
-dccp_tfrc_lib-y := tfrc.o tfrc_equation.o packet_history.o loss_interval.o
diff --git a/net/dccp/ccids/lib/loss_interval.c b/net/dccp/ccids/lib/loss_interval.c
index 5b3ce0688c5c..4d1e40127264 100644
--- a/net/dccp/ccids/lib/loss_interval.c
+++ b/net/dccp/ccids/lib/loss_interval.c
@@ -60,7 +60,6 @@ void tfrc_lh_cleanup(struct tfrc_loss_hist *lh)
 			lh->ring[LIH_INDEX(lh->counter)] = NULL;
 		}
 }
-EXPORT_SYMBOL_GPL(tfrc_lh_cleanup);
 
 static void tfrc_lh_calc_i_mean(struct tfrc_loss_hist *lh)
 {
@@ -121,7 +120,6 @@ u8 tfrc_lh_update_i_mean(struct tfrc_loss_hist *lh, struct sk_buff *skb)
 
 	return (lh->i_mean < old_i_mean);
 }
-EXPORT_SYMBOL_GPL(tfrc_lh_update_i_mean);
 
 /* Determine if `new_loss' does begin a new loss interval [RFC 4342, 10.2] */
 static inline u8 tfrc_lh_is_new_loss(struct tfrc_loss_interval *cur,
@@ -169,7 +167,6 @@ int tfrc_lh_interval_add(struct tfrc_loss_hist *lh, struct tfrc_rx_hist *rh,
 	}
 	return 1;
 }
-EXPORT_SYMBOL_GPL(tfrc_lh_interval_add);
 
 int __init tfrc_li_init(void)
 {
diff --git a/net/dccp/ccids/lib/packet_history.c b/net/dccp/ccids/lib/packet_history.c
index 6cc108afdc3b..b7785b3581ec 100644
--- a/net/dccp/ccids/lib/packet_history.c
+++ b/net/dccp/ccids/lib/packet_history.c
@@ -94,7 +94,6 @@ int tfrc_tx_hist_add(struct tfrc_tx_hist_entry **headp, u64 seqno)
 	*headp	     = entry;
 	return 0;
 }
-EXPORT_SYMBOL_GPL(tfrc_tx_hist_add);
 
 void tfrc_tx_hist_purge(struct tfrc_tx_hist_entry **headp)
 {
@@ -109,7 +108,6 @@ void tfrc_tx_hist_purge(struct tfrc_tx_hist_entry **headp)
 
 	*headp = NULL;
 }
-EXPORT_SYMBOL_GPL(tfrc_tx_hist_purge);
 
 u32 tfrc_tx_hist_rtt(struct tfrc_tx_hist_entry *head, const u64 seqno,
 		     const ktime_t now)
@@ -127,7 +125,6 @@ u32 tfrc_tx_hist_rtt(struct tfrc_tx_hist_entry *head, const u64 seqno,
 
 	return rtt;
 }
-EXPORT_SYMBOL_GPL(tfrc_tx_hist_rtt);
 
 
 /*
@@ -172,7 +169,6 @@ void tfrc_rx_hist_add_packet(struct tfrc_rx_hist *h,
 
 	tfrc_rx_hist_entry_from_skb(entry, skb, ndp);
 }
-EXPORT_SYMBOL_GPL(tfrc_rx_hist_add_packet);
 
 /* has the packet contained in skb been seen before? */
 int tfrc_rx_hist_duplicate(struct tfrc_rx_hist *h, struct sk_buff *skb)
@@ -189,7 +185,6 @@ int tfrc_rx_hist_duplicate(struct tfrc_rx_hist *h, struct sk_buff *skb)
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(tfrc_rx_hist_duplicate);
 
 static void tfrc_rx_hist_swap(struct tfrc_rx_hist *h, const u8 a, const u8 b)
 {
@@ -390,7 +385,6 @@ int tfrc_rx_handle_loss(struct tfrc_rx_hist *h,
 	}
 	return is_new_loss;
 }
-EXPORT_SYMBOL_GPL(tfrc_rx_handle_loss);
 
 int tfrc_rx_hist_alloc(struct tfrc_rx_hist *h)
 {
@@ -412,7 +406,6 @@ out_free:
 	}
 	return -ENOBUFS;
 }
-EXPORT_SYMBOL_GPL(tfrc_rx_hist_alloc);
 
 void tfrc_rx_hist_purge(struct tfrc_rx_hist *h)
 {
@@ -424,7 +417,6 @@ void tfrc_rx_hist_purge(struct tfrc_rx_hist *h)
 			h->ring[i] = NULL;
 		}
 }
-EXPORT_SYMBOL_GPL(tfrc_rx_hist_purge);
 
 /**
  * tfrc_rx_hist_rtt_last_s - reference entry to compute RTT samples against
@@ -495,4 +487,3 @@ keep_ref_for_next_time:
 
 	return sample;
 }
-EXPORT_SYMBOL_GPL(tfrc_rx_hist_sample_rtt);
diff --git a/net/dccp/ccids/lib/tfrc.c b/net/dccp/ccids/lib/tfrc.c
index 185916218e07..60c412ccfeef 100644
--- a/net/dccp/ccids/lib/tfrc.c
+++ b/net/dccp/ccids/lib/tfrc.c
@@ -1,20 +1,18 @@
 /*
- * TFRC: main module holding the pieces of the TFRC library together
+ * TFRC library initialisation
  *
  * Copyright (c) 2007 The University of Aberdeen, Scotland, UK
  * Copyright (c) 2007 Arnaldo Carvalho de Melo <acme@redhat.com>
  */
-#include <linux/module.h>
-#include <linux/moduleparam.h>
 #include "tfrc.h"
 
 #ifdef CONFIG_IP_DCCP_TFRC_DEBUG
 int tfrc_debug;
 module_param(tfrc_debug, bool, 0644);
-MODULE_PARM_DESC(tfrc_debug, "Enable debug messages");
+MODULE_PARM_DESC(tfrc_debug, "Enable TFRC debug messages");
 #endif
 
-static int __init tfrc_module_init(void)
+int __init tfrc_lib_init(void)
 {
 	int rc = tfrc_li_init();
 
@@ -38,18 +36,9 @@ out:
 	return rc;
 }
 
-static void __exit tfrc_module_exit(void)
+void __exit tfrc_lib_exit(void)
 {
 	tfrc_rx_packet_history_exit();
 	tfrc_tx_packet_history_exit();
 	tfrc_li_exit();
 }
-
-module_init(tfrc_module_init);
-module_exit(tfrc_module_exit);
-
-MODULE_AUTHOR("Gerrit Renker <gerrit@erg.abdn.ac.uk>, "
-	      "Ian McDonald <ian.mcdonald@jandi.co.nz>, "
-	      "Arnaldo Carvalho de Melo <acme@redhat.com>");
-MODULE_DESCRIPTION("DCCP TFRC library");
-MODULE_LICENSE("GPL");
diff --git a/net/dccp/ccids/lib/tfrc.h b/net/dccp/ccids/lib/tfrc.h
index ed9857527acf..e9720b143275 100644
--- a/net/dccp/ccids/lib/tfrc.h
+++ b/net/dccp/ccids/lib/tfrc.h
@@ -17,7 +17,8 @@
 #include <linux/types.h>
 #include <linux/math64.h>
 #include "../../dccp.h"
-/* internal includes that this module exports: */
+
+/* internal includes that this library exports: */
 #include "loss_interval.h"
 #include "packet_history.h"
 
@@ -66,4 +67,12 @@ extern void tfrc_rx_packet_history_exit(void);
 
 extern int  tfrc_li_init(void);
 extern void tfrc_li_exit(void);
+
+#ifdef CONFIG_IP_DCCP_TFRC_LIB
+extern int  tfrc_lib_init(void);
+extern void tfrc_lib_exit(void);
+#else
+#define tfrc_lib_init() (0)
+#define tfrc_lib_exit()
+#endif
 #endif /* _TFRC_H_ */
diff --git a/net/dccp/ccids/lib/tfrc_equation.c b/net/dccp/ccids/lib/tfrc_equation.c
index 2f20a29cffe4..c5d3a9e5a5a4 100644
--- a/net/dccp/ccids/lib/tfrc_equation.c
+++ b/net/dccp/ccids/lib/tfrc_equation.c
@@ -659,8 +659,6 @@ u32 tfrc_calc_x(u16 s, u32 R, u32 p)
 	return scaled_div32(result, f);
 }
 
-EXPORT_SYMBOL_GPL(tfrc_calc_x);
-
 /**
  *  tfrc_calc_x_reverse_lookup  -  try to find p given f(p)
  *
@@ -693,5 +691,3 @@ u32 tfrc_calc_x_reverse_lookup(u32 fvalue)
 	index = tfrc_binsearch(fvalue, 0);
 	return (index + 1) * 1000000 / TFRC_CALC_X_ARRSIZE;
 }
-
-EXPORT_SYMBOL_GPL(tfrc_calc_x_reverse_lookup);
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 0bc4c9a02e19..f2230fc168e1 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -432,10 +432,8 @@ static inline int dccp_ack_pending(const struct sock *sk)
 {
 	const struct dccp_sock *dp = dccp_sk(sk);
 	return dp->dccps_timestamp_echo != 0 ||
-#ifdef CONFIG_IP_DCCP_ACKVEC
 	       (dp->dccps_hc_rx_ackvec != NULL &&
 		dccp_ackvec_pending(dp->dccps_hc_rx_ackvec)) ||
-#endif
 	       inet_csk_ack_scheduled(sk);
 }
 
diff --git a/net/dccp/feat.c b/net/dccp/feat.c
index 30f9fb76b921..4152308958ab 100644
--- a/net/dccp/feat.c
+++ b/net/dccp/feat.c
@@ -34,7 +34,7 @@
 static int dccp_hdlr_ccid(struct sock *sk, u64 ccid, bool rx)
 {
 	struct dccp_sock *dp = dccp_sk(sk);
-	struct ccid *new_ccid = ccid_new(ccid, sk, rx, gfp_any());
+	struct ccid *new_ccid = ccid_new(ccid, sk, rx);
 
 	if (new_ccid == NULL)
 		return -ENOMEM;
@@ -1214,8 +1214,6 @@ const char *dccp_feat_typename(const u8 type)
 	return NULL;
 }
 
-EXPORT_SYMBOL_GPL(dccp_feat_typename);
-
 const char *dccp_feat_name(const u8 feat)
 {
 	static const char *feature_names[] = {
@@ -1240,6 +1238,4 @@ const char *dccp_feat_name(const u8 feat)
 
 	return feature_names[feat];
 }
-
-EXPORT_SYMBOL_GPL(dccp_feat_name);
 #endif /* CONFIG_IP_DCCP_DEBUG */
diff --git a/net/dccp/input.c b/net/dccp/input.c
index 5eb443f656c1..7648f316310f 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -741,5 +741,3 @@ u32 dccp_sample_rtt(struct sock *sk, long delta)
 
 	return delta;
 }
-
-EXPORT_SYMBOL_GPL(dccp_sample_rtt);
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 1747ccae8e8d..945b4d5d23b3 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -1118,9 +1118,15 @@ static int __init dccp_init(void)
 	if (rc)
 		goto out_ackvec_exit;
 
+	rc = ccid_initialize_builtins();
+	if (rc)
+		goto out_sysctl_exit;
+
 	dccp_timestamping_init();
 out:
 	return rc;
+out_sysctl_exit:
+	dccp_sysctl_exit();
 out_ackvec_exit:
 	dccp_ackvec_exit();
 out_free_dccp_mib:
@@ -1143,6 +1149,7 @@ out_free_percpu:
 
 static void __exit dccp_fini(void)
 {
+	ccid_cleanup_builtins();
 	dccp_mib_exit();
 	free_pages((unsigned long)dccp_hashinfo.bhash,
 		   get_order(dccp_hashinfo.bhash_size *
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index f28acf11fc67..35bcddf8a932 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -580,10 +580,6 @@ ssize_t tcp_splice_read(struct socket *sock, loff_t *ppos,
 		else if (!ret) {
 			if (spliced)
 				break;
-			if (flags & SPLICE_F_NONBLOCK) {
-				ret = -EAGAIN;
-				break;
-			}
 			if (sock_flag(sk, SOCK_DONE))
 				break;
 			if (sk->sk_err) {
@@ -2519,9 +2515,7 @@ found:
 	flush |= memcmp(th + 1, th2 + 1, thlen - sizeof(*th));
 
 	total = p->len;
-	mss = total;
-	if (skb_shinfo(p)->frag_list)
-		mss = skb_shinfo(p)->frag_list->len;
+	mss = skb_shinfo(p)->gso_size;
 
 	flush |= skb->len > mss || skb->len <= 0;
 	flush |= ntohl(th2->seq) + total != ntohl(th->seq);
@@ -2557,7 +2551,6 @@ int tcp_gro_complete(struct sk_buff *skb)
 	skb->csum_offset = offsetof(struct tcphdr, check);
 	skb->ip_summed = CHECKSUM_PARTIAL;
 
-	skb_shinfo(skb)->gso_size = skb_shinfo(skb)->frag_list->len;
 	skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
 
 	if (th->cwr)
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index eeeaad2e8b5c..40f324655e24 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -404,7 +404,7 @@ sticky_done:
 		else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
 			goto e_inval;
 
-		if (copy_from_user(&pkt, optval, optlen)) {
+		if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {
 				retv = -EFAULT;
 				break;
 		}
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 18c486cf4987..76f06b94ab9f 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -627,6 +627,9 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *dad
 	rt = ip6_rt_copy(ort);
 
 	if (rt) {
+		struct neighbour *neigh;
+		int attempts = !in_softirq();
+
 		if (!(rt->rt6i_flags&RTF_GATEWAY)) {
 			if (rt->rt6i_dst.plen != 128 &&
 			    ipv6_addr_equal(&rt->rt6i_dst.addr, daddr))
@@ -646,7 +649,35 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *dad
 		}
 #endif
 
-		rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+	retry:
+		neigh = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+		if (IS_ERR(neigh)) {
+			struct net *net = dev_net(rt->rt6i_dev);
+			int saved_rt_min_interval =
+				net->ipv6.sysctl.ip6_rt_gc_min_interval;
+			int saved_rt_elasticity =
+				net->ipv6.sysctl.ip6_rt_gc_elasticity;
+
+			if (attempts-- > 0) {
+				net->ipv6.sysctl.ip6_rt_gc_elasticity = 1;
+				net->ipv6.sysctl.ip6_rt_gc_min_interval = 0;
+
+				ip6_dst_gc(net->ipv6.ip6_dst_ops);
+
+				net->ipv6.sysctl.ip6_rt_gc_elasticity =
+					saved_rt_elasticity;
+				net->ipv6.sysctl.ip6_rt_gc_min_interval =
+					saved_rt_min_interval;
+				goto retry;
+			}
+
+			if (net_ratelimit())
+				printk(KERN_WARNING
+				       "Neighbour table overflow.\n");
+			dst_free(&rt->u.dst);
+			return NULL;
+		}
+		rt->rt6i_nexthop = neigh;
 
 	}
 
@@ -945,8 +976,11 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
 	dev_hold(dev);
 	if (neigh)
 		neigh_hold(neigh);
-	else
+	else {
 		neigh = ndisc_get_neigh(dev, addr);
+		if (IS_ERR(neigh))
+			neigh = NULL;
+	}
 
 	rt->rt6i_dev	  = dev;
 	rt->rt6i_idev     = idev;
@@ -1887,6 +1921,7 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 {
 	struct net *net = dev_net(idev->dev);
 	struct rt6_info *rt = ip6_dst_alloc(net->ipv6.ip6_dst_ops);
+	struct neighbour *neigh;
 
 	if (rt == NULL)
 		return ERR_PTR(-ENOMEM);
@@ -1909,11 +1944,18 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 		rt->rt6i_flags |= RTF_ANYCAST;
 	else
 		rt->rt6i_flags |= RTF_LOCAL;
-	rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
-	if (rt->rt6i_nexthop == NULL) {
+	neigh = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+	if (IS_ERR(neigh)) {
 		dst_free(&rt->u.dst);
-		return ERR_PTR(-ENOMEM);
+
+		/* We are casting this because that is the return
+		 * value type.  But an errno encoded pointer is the
+		 * same regardless of the underlying pointer type,
+		 * and that's what we are returning.  So this is OK.
+		 */
+		return (struct rt6_info *) neigh;
 	}
+	rt->rt6i_nexthop = neigh;
 
 	ipv6_addr_copy(&rt->rt6i_dst.addr, addr);
 	rt->rt6i_dst.plen = 128;
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index af3192d2a5a3..eb8a2a0b6eb7 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -494,7 +494,21 @@ static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
 	if (err) {
 		iucv_path_free(iucv->path);
 		iucv->path = NULL;
-		err = -ECONNREFUSED;
+		switch (err) {
+		case 0x0b:	/* Target communicator is not logged on */
+			err = -ENETUNREACH;
+			break;
+		case 0x0d:	/* Max connections for this guest exceeded */
+		case 0x0e:	/* Max connections for target guest exceeded */
+			err = -EAGAIN;
+			break;
+		case 0x0f:	/* Missing IUCV authorization */
+			err = -EACCES;
+			break;
+		default:
+			err = -ECONNREFUSED;
+			break;
+		}
 		goto done;
 	}
 
@@ -507,6 +521,13 @@ static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
 		release_sock(sk);
 		return -ECONNREFUSED;
 	}
+
+	if (err) {
+		iucv_path_sever(iucv->path, NULL);
+		iucv_path_free(iucv->path);
+		iucv->path = NULL;
+	}
+
 done:
 	release_sock(sk);
 	return err;
@@ -1021,12 +1042,14 @@ static int iucv_callback_connreq(struct iucv_path *path,
 	ASCEBC(user_data, sizeof(user_data));
 	if (sk->sk_state != IUCV_LISTEN) {
 		err = iucv_path_sever(path, user_data);
+		iucv_path_free(path);
 		goto fail;
 	}
 
 	/* Check for backlog size */
 	if (sk_acceptq_is_full(sk)) {
 		err = iucv_path_sever(path, user_data);
+		iucv_path_free(path);
 		goto fail;
 	}
 
@@ -1034,6 +1057,7 @@ static int iucv_callback_connreq(struct iucv_path *path,
 	nsk = iucv_sock_alloc(NULL, SOCK_STREAM, GFP_ATOMIC);
 	if (!nsk) {
 		err = iucv_path_sever(path, user_data);
+		iucv_path_free(path);
 		goto fail;
 	}
 
@@ -1057,6 +1081,8 @@ static int iucv_callback_connreq(struct iucv_path *path,
 	err = iucv_path_accept(path, &af_iucv_handler, nuser_data, nsk);
 	if (err) {
 		err = iucv_path_sever(path, user_data);
+		iucv_path_free(path);
+		iucv_sock_kill(nsk);
 		goto fail;
 	}
 
diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index 8f57d4f4328a..032f61e98595 100644
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -517,6 +517,7 @@ static int iucv_enable(void)
 	size_t alloc_size;
 	int cpu, rc;
 
+	get_online_cpus();
 	rc = -ENOMEM;
 	alloc_size = iucv_max_pathid * sizeof(struct iucv_path);
 	iucv_path_table = kzalloc(alloc_size, GFP_KERNEL);
@@ -524,19 +525,17 @@ static int iucv_enable(void)
 		goto out;
 	/* Declare per cpu buffers. */
 	rc = -EIO;
-	get_online_cpus();
 	for_each_online_cpu(cpu)
 		smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1);
 	if (cpus_empty(iucv_buffer_cpumask))
 		/* No cpu could declare an iucv buffer. */
-		goto out_path;
+		goto out;
 	put_online_cpus();
 	return 0;
-
-out_path:
-	put_online_cpus();
-	kfree(iucv_path_table);
 out:
+	kfree(iucv_path_table);
+	iucv_path_table = NULL;
+	put_online_cpus();
 	return rc;
 }
 
@@ -551,8 +550,9 @@ static void iucv_disable(void)
 {
 	get_online_cpus();
 	on_each_cpu(iucv_retrieve_cpu, NULL, 1);
-	put_online_cpus();
 	kfree(iucv_path_table);
+	iucv_path_table = NULL;
+	put_online_cpus();
 }
 
 static int __cpuinit iucv_cpu_notify(struct notifier_block *self,
@@ -589,10 +589,14 @@ static int __cpuinit iucv_cpu_notify(struct notifier_block *self,
 	case CPU_ONLINE_FROZEN:
 	case CPU_DOWN_FAILED:
 	case CPU_DOWN_FAILED_FROZEN:
+		if (!iucv_path_table)
+			break;
 		smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1);
 		break;
 	case CPU_DOWN_PREPARE:
 	case CPU_DOWN_PREPARE_FROZEN:
+		if (!iucv_path_table)
+			break;
 		cpumask = iucv_buffer_cpumask;
 		cpu_clear(cpu, cpumask);
 		if (cpus_empty(cpumask))
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index 3c94f76d5525..3eaa39403c13 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -54,10 +54,10 @@ static unsigned long rfkill_states_lockdflt[BITS_TO_LONGS(RFKILL_TYPE_MAX)];
 static bool rfkill_epo_lock_active;
 
 
+#ifdef CONFIG_RFKILL_LEDS
 static void rfkill_led_trigger(struct rfkill *rfkill,
 			       enum rfkill_state state)
 {
-#ifdef CONFIG_RFKILL_LEDS
 	struct led_trigger *led = &rfkill->led_trigger;
 
 	if (!led->name)
@@ -66,10 +66,8 @@ static void rfkill_led_trigger(struct rfkill *rfkill,
 		led_trigger_event(led, LED_OFF);
 	else
 		led_trigger_event(led, LED_FULL);
-#endif /* CONFIG_RFKILL_LEDS */
 }
 
-#ifdef CONFIG_RFKILL_LEDS
 static void rfkill_led_trigger_activate(struct led_classdev *led)
 {
 	struct rfkill *rfkill = container_of(led->trigger,
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 05d178008cbc..07372f60bee3 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -638,8 +638,9 @@ static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle,
 				break;
 
 		n->next = *ins;
-		wmb();
+		tcf_tree_lock(tp);
 		*ins = n;
+		tcf_tree_unlock(tp);
 
 		*arg = (unsigned long)n;
 		return 0;