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

Pull networking updates from David Miller:
 "Reasonably busy this cycle, but perhaps not as busy as in the 4.12
  merge window:

   1) Several optimizations for UDP processing under high load from
      Paolo Abeni.

   2) Support pacing internally in TCP when using the sch_fq packet
      scheduler for this is not practical. From Eric Dumazet.

   3) Support mutliple filter chains per qdisc, from Jiri Pirko.

   4) Move to 1ms TCP timestamp clock, from Eric Dumazet.

   5) Add batch dequeueing to vhost_net, from Jason Wang.

   6) Flesh out more completely SCTP checksum offload support, from
      Davide Caratti.

   7) More plumbing of extended netlink ACKs, from David Ahern, Pablo
      Neira Ayuso, and Matthias Schiffer.

   8) Add devlink support to nfp driver, from Simon Horman.

   9) Add RTM_F_FIB_MATCH flag to RTM_GETROUTE queries, from Roopa
      Prabhu.

  10) Add stack depth tracking to BPF verifier and use this information
      in the various eBPF JITs. From Alexei Starovoitov.

  11) Support XDP on qed device VFs, from Yuval Mintz.

  12) Introduce BPF PROG ID for better introspection of installed BPF
      programs. From Martin KaFai Lau.

  13) Add bpf_set_hash helper for TC bpf programs, from Daniel Borkmann.

  14) For loads, allow narrower accesses in bpf verifier checking, from
      Yonghong Song.

  15) Support MIPS in the BPF selftests and samples infrastructure, the
      MIPS eBPF JIT will be merged in via the MIPS GIT tree. From David
      Daney.

  16) Support kernel based TLS, from Dave Watson and others.

  17) Remove completely DST garbage collection, from Wei Wang.

  18) Allow installing TCP MD5 rules using prefixes, from Ivan
      Delalande.

  19) Add XDP support to Intel i40e driver, from Björn Töpel

  20) Add support for TC flower offload in nfp driver, from Simon
      Horman, Pieter Jansen van Vuuren, Benjamin LaHaise, Jakub
      Kicinski, and Bert van Leeuwen.

  21) IPSEC offloading support in mlx5, from Ilan Tayari.

  22) Add HW PTP support to macb driver, from Rafal Ozieblo.

  23) Networking refcount_t conversions, From Elena Reshetova.

  24) Add sock_ops support to BPF, from Lawrence Brako. This is useful
      for tuning the TCP sockopt settings of a group of applications,
      currently via CGROUPs"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1899 commits)
  net: phy: dp83867: add workaround for incorrect RX_CTRL pin strap
  dt-bindings: phy: dp83867: provide a workaround for incorrect RX_CTRL pin strap
  cxgb4: Support for get_ts_info ethtool method
  cxgb4: Add PTP Hardware Clock (PHC) support
  cxgb4: time stamping interface for PTP
  nfp: default to chained metadata prepend format
  nfp: remove legacy MAC address lookup
  nfp: improve order of interfaces in breakout mode
  net: macb: remove extraneous return when MACB_EXT_DESC is defined
  bpf: add missing break in for the TCP_BPF_SNDCWND_CLAMP case
  bpf: fix return in load_bpf_file
  mpls: fix rtm policy in mpls_getroute
  net, ax25: convert ax25_cb.refcount from atomic_t to refcount_t
  net, ax25: convert ax25_route.refcount from atomic_t to refcount_t
  net, ax25: convert ax25_uid_assoc.refcount from atomic_t to refcount_t
  net, sctp: convert sctp_ep_common.refcnt from atomic_t to refcount_t
  net, sctp: convert sctp_transport.refcnt from atomic_t to refcount_t
  net, sctp: convert sctp_chunk.refcnt from atomic_t to refcount_t
  net, sctp: convert sctp_datamsg.refcnt from atomic_t to refcount_t
  net, sctp: convert sctp_auth_bytes.refcnt from atomic_t to refcount_t
  ...

13 files changed, 42 insertions, 42 deletions

diff --git a/net/atm/br2684.c b/net/atm/br2684.c
index fca84e111c89..4e111196f902 100644
--- a/net/atm/br2684.c
+++ b/net/atm/br2684.c
@@ -252,7 +252,7 @@ static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev,
 
 	ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
 	pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
-	atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
+	refcount_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
 	ATM_SKB(skb)->atm_options = atmvcc->atm_options;
 	dev->stats.tx_packets++;
 	dev->stats.tx_bytes += skb->len;
diff --git a/net/atm/clip.c b/net/atm/clip.c
index ec527b62f79d..f271a7bcf5b2 100644
--- a/net/atm/clip.c
+++ b/net/atm/clip.c
@@ -60,7 +60,7 @@ static int to_atmarpd(enum atmarp_ctrl_type type, int itf, __be32 ip)
 	skb = alloc_skb(sizeof(struct atmarp_ctrl), GFP_ATOMIC);
 	if (!skb)
 		return -ENOMEM;
-	ctrl = (struct atmarp_ctrl *)skb_put(skb, sizeof(struct atmarp_ctrl));
+	ctrl = skb_put(skb, sizeof(struct atmarp_ctrl));
 	ctrl->type = type;
 	ctrl->itf_num = itf;
 	ctrl->ip = ip;
@@ -137,11 +137,11 @@ static int neigh_check_cb(struct neighbour *n)
 	if (entry->vccs || time_before(jiffies, entry->expires))
 		return 0;
 
-	if (atomic_read(&n->refcnt) > 1) {
+	if (refcount_read(&n->refcnt) > 1) {
 		struct sk_buff *skb;
 
 		pr_debug("destruction postponed with ref %d\n",
-			 atomic_read(&n->refcnt));
+			 refcount_read(&n->refcnt));
 
 		while ((skb = skb_dequeue(&n->arp_queue)) != NULL)
 			dev_kfree_skb(skb);
@@ -381,7 +381,7 @@ static netdev_tx_t clip_start_xmit(struct sk_buff *skb,
 		memcpy(here, llc_oui, sizeof(llc_oui));
 		((__be16 *) here)[3] = skb->protocol;
 	}
-	atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+	refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
 	ATM_SKB(skb)->atm_options = vcc->atm_options;
 	entry->vccs->last_use = jiffies;
 	pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, vcc, vcc->dev);
@@ -767,7 +767,7 @@ static void atmarp_info(struct seq_file *seq, struct neighbour *n,
 			seq_printf(seq, "(resolving)\n");
 		else
 			seq_printf(seq, "(expired, ref %d)\n",
-				   atomic_read(&entry->neigh->refcnt));
+				   refcount_read(&entry->neigh->refcnt));
 	} else if (!svc) {
 		seq_printf(seq, "%d.%d.%d\n",
 			   clip_vcc->vcc->dev->number,
diff --git a/net/atm/common.c b/net/atm/common.c
index f06422f4108d..8a4f99114cd2 100644
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -80,9 +80,9 @@ static void vcc_sock_destruct(struct sock *sk)
 		printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n",
 		       __func__, atomic_read(&sk->sk_rmem_alloc));
 
-	if (atomic_read(&sk->sk_wmem_alloc))
+	if (refcount_read(&sk->sk_wmem_alloc))
 		printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n",
-		       __func__, atomic_read(&sk->sk_wmem_alloc));
+		       __func__, refcount_read(&sk->sk_wmem_alloc));
 }
 
 static void vcc_def_wakeup(struct sock *sk)
@@ -101,7 +101,7 @@ static inline int vcc_writable(struct sock *sk)
 	struct atm_vcc *vcc = atm_sk(sk);
 
 	return (vcc->qos.txtp.max_sdu +
-		atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
+		refcount_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
 }
 
 static void vcc_write_space(struct sock *sk)
@@ -156,7 +156,7 @@ int vcc_create(struct net *net, struct socket *sock, int protocol, int family, i
 	memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc));
 	memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc));
 	vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
-	atomic_set(&sk->sk_wmem_alloc, 1);
+	refcount_set(&sk->sk_wmem_alloc, 1);
 	atomic_set(&sk->sk_rmem_alloc, 0);
 	vcc->push = NULL;
 	vcc->pop = NULL;
@@ -630,7 +630,7 @@ int vcc_sendmsg(struct socket *sock, struct msghdr *m, size_t size)
 		goto out;
 	}
 	pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize);
-	atomic_add(skb->truesize, &sk->sk_wmem_alloc);
+	refcount_add(skb->truesize, &sk->sk_wmem_alloc);
 
 	skb->dev = NULL; /* for paths shared with net_device interfaces */
 	ATM_SKB(skb)->atm_options = vcc->atm_options;
diff --git a/net/atm/lec.c b/net/atm/lec.c
index 09cfe87f0a44..093fe8707731 100644
--- a/net/atm/lec.c
+++ b/net/atm/lec.c
@@ -101,12 +101,12 @@ static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
 /* must be done under lec_arp_lock */
 static inline void lec_arp_hold(struct lec_arp_table *entry)
 {
-	atomic_inc(&entry->usage);
+	refcount_inc(&entry->usage);
 }
 
 static inline void lec_arp_put(struct lec_arp_table *entry)
 {
-	if (atomic_dec_and_test(&entry->usage))
+	if (refcount_dec_and_test(&entry->usage))
 		kfree(entry);
 }
 
@@ -181,7 +181,7 @@ lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
 	ATM_SKB(skb)->vcc = vcc;
 	ATM_SKB(skb)->atm_options = vcc->atm_options;
 
-	atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+	refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
 	if (vcc->send(vcc, skb) < 0) {
 		dev->stats.tx_dropped++;
 		return;
@@ -345,7 +345,7 @@ static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
 	int i;
 	char *tmp;		/* FIXME */
 
-	atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+	WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
 	mesg = (struct atmlec_msg *)skb->data;
 	tmp = skb->data;
 	tmp += sizeof(struct atmlec_msg);
@@ -1564,7 +1564,7 @@ static struct lec_arp_table *make_entry(struct lec_priv *priv,
 	to_return->last_used = jiffies;
 	to_return->priv = priv;
 	skb_queue_head_init(&to_return->tx_wait);
-	atomic_set(&to_return->usage, 1);
+	refcount_set(&to_return->usage, 1);
 	return to_return;
 }
 
diff --git a/net/atm/lec_arpc.h b/net/atm/lec_arpc.h
index ec67435a40a6..d923f53812a3 100644
--- a/net/atm/lec_arpc.h
+++ b/net/atm/lec_arpc.h
@@ -47,7 +47,7 @@ struct lec_arp_table {
 					 * the length of the tlvs array
 					 */
 	struct sk_buff_head tx_wait;	/* wait queue for outgoing packets */
-	atomic_t usage;			/* usage count */
+	refcount_t usage;		/* usage count */
 };
 
 /*
diff --git a/net/atm/mpc.c b/net/atm/mpc.c
index a190800572bd..680a4b9095a1 100644
--- a/net/atm/mpc.c
+++ b/net/atm/mpc.c
@@ -555,7 +555,7 @@ static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc)
 					sizeof(struct llc_snap_hdr));
 	}
 
-	atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc);
+	refcount_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc);
 	ATM_SKB(skb)->atm_options = entry->shortcut->atm_options;
 	entry->shortcut->send(entry->shortcut, skb);
 	entry->packets_fwded++;
@@ -911,7 +911,7 @@ static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb)
 
 	struct mpoa_client *mpc = find_mpc_by_vcc(vcc);
 	struct k_message *mesg = (struct k_message *)skb->data;
-	atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+	WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
 
 	if (mpc == NULL) {
 		pr_info("no mpc found\n");
diff --git a/net/atm/mpoa_caches.c b/net/atm/mpoa_caches.c
index a89fdebeffda..4ccaa16b1eb1 100644
--- a/net/atm/mpoa_caches.c
+++ b/net/atm/mpoa_caches.c
@@ -40,7 +40,7 @@ static in_cache_entry *in_cache_get(__be32 dst_ip,
 	entry = client->in_cache;
 	while (entry != NULL) {
 		if (entry->ctrl_info.in_dst_ip == dst_ip) {
-			atomic_inc(&entry->use);
+			refcount_inc(&entry->use);
 			read_unlock_bh(&client->ingress_lock);
 			return entry;
 		}
@@ -61,7 +61,7 @@ static in_cache_entry *in_cache_get_with_mask(__be32 dst_ip,
 	entry = client->in_cache;
 	while (entry != NULL) {
 		if ((entry->ctrl_info.in_dst_ip & mask) == (dst_ip & mask)) {
-			atomic_inc(&entry->use);
+			refcount_inc(&entry->use);
 			read_unlock_bh(&client->ingress_lock);
 			return entry;
 		}
@@ -82,7 +82,7 @@ static in_cache_entry *in_cache_get_by_vcc(struct atm_vcc *vcc,
 	entry = client->in_cache;
 	while (entry != NULL) {
 		if (entry->shortcut == vcc) {
-			atomic_inc(&entry->use);
+			refcount_inc(&entry->use);
 			read_unlock_bh(&client->ingress_lock);
 			return entry;
 		}
@@ -105,7 +105,7 @@ static in_cache_entry *in_cache_add_entry(__be32 dst_ip,
 
 	dprintk("adding an ingress entry, ip = %pI4\n", &dst_ip);
 
-	atomic_set(&entry->use, 1);
+	refcount_set(&entry->use, 1);
 	dprintk("new_in_cache_entry: about to lock\n");
 	write_lock_bh(&client->ingress_lock);
 	entry->next = client->in_cache;
@@ -121,7 +121,7 @@ static in_cache_entry *in_cache_add_entry(__be32 dst_ip,
 	entry->count = 1;
 	entry->entry_state = INGRESS_INVALID;
 	entry->ctrl_info.holding_time = HOLDING_TIME_DEFAULT;
-	atomic_inc(&entry->use);
+	refcount_inc(&entry->use);
 
 	write_unlock_bh(&client->ingress_lock);
 	dprintk("new_in_cache_entry: unlocked\n");
@@ -178,7 +178,7 @@ static int cache_hit(in_cache_entry *entry, struct mpoa_client *mpc)
 
 static void in_cache_put(in_cache_entry *entry)
 {
-	if (atomic_dec_and_test(&entry->use)) {
+	if (refcount_dec_and_test(&entry->use)) {
 		memset(entry, 0, sizeof(in_cache_entry));
 		kfree(entry);
 	}
@@ -339,7 +339,7 @@ static eg_cache_entry *eg_cache_get_by_cache_id(__be32 cache_id,
 	entry = mpc->eg_cache;
 	while (entry != NULL) {
 		if (entry->ctrl_info.cache_id == cache_id) {
-			atomic_inc(&entry->use);
+			refcount_inc(&entry->use);
 			read_unlock_irq(&mpc->egress_lock);
 			return entry;
 		}
@@ -360,7 +360,7 @@ static eg_cache_entry *eg_cache_get_by_tag(__be32 tag, struct mpoa_client *mpc)
 	entry = mpc->eg_cache;
 	while (entry != NULL) {
 		if (entry->ctrl_info.tag == tag) {
-			atomic_inc(&entry->use);
+			refcount_inc(&entry->use);
 			read_unlock_irqrestore(&mpc->egress_lock, flags);
 			return entry;
 		}
@@ -382,7 +382,7 @@ static eg_cache_entry *eg_cache_get_by_vcc(struct atm_vcc *vcc,
 	entry = mpc->eg_cache;
 	while (entry != NULL) {
 		if (entry->shortcut == vcc) {
-			atomic_inc(&entry->use);
+			refcount_inc(&entry->use);
 			read_unlock_irqrestore(&mpc->egress_lock, flags);
 			return entry;
 		}
@@ -402,7 +402,7 @@ static eg_cache_entry *eg_cache_get_by_src_ip(__be32 ipaddr,
 	entry = mpc->eg_cache;
 	while (entry != NULL) {
 		if (entry->latest_ip_addr == ipaddr) {
-			atomic_inc(&entry->use);
+			refcount_inc(&entry->use);
 			read_unlock_irq(&mpc->egress_lock);
 			return entry;
 		}
@@ -415,7 +415,7 @@ static eg_cache_entry *eg_cache_get_by_src_ip(__be32 ipaddr,
 
 static void eg_cache_put(eg_cache_entry *entry)
 {
-	if (atomic_dec_and_test(&entry->use)) {
+	if (refcount_dec_and_test(&entry->use)) {
 		memset(entry, 0, sizeof(eg_cache_entry));
 		kfree(entry);
 	}
@@ -468,7 +468,7 @@ static eg_cache_entry *eg_cache_add_entry(struct k_message *msg,
 	dprintk("adding an egress entry, ip = %pI4, this should be our IP\n",
 		&msg->content.eg_info.eg_dst_ip);
 
-	atomic_set(&entry->use, 1);
+	refcount_set(&entry->use, 1);
 	dprintk("new_eg_cache_entry: about to lock\n");
 	write_lock_irq(&client->egress_lock);
 	entry->next = client->eg_cache;
@@ -484,7 +484,7 @@ static eg_cache_entry *eg_cache_add_entry(struct k_message *msg,
 	dprintk("new_eg_cache_entry cache_id %u\n",
 		ntohl(entry->ctrl_info.cache_id));
 	dprintk("mps_ip = %pI4\n", &entry->ctrl_info.mps_ip);
-	atomic_inc(&entry->use);
+	refcount_inc(&entry->use);
 
 	write_unlock_irq(&client->egress_lock);
 	dprintk("new_eg_cache_entry: unlocked\n");
diff --git a/net/atm/mpoa_caches.h b/net/atm/mpoa_caches.h
index 8e5f78cf0be1..30fe34841ced 100644
--- a/net/atm/mpoa_caches.h
+++ b/net/atm/mpoa_caches.h
@@ -6,6 +6,7 @@
 #include <linux/atm.h>
 #include <linux/atmdev.h>
 #include <linux/atmmpc.h>
+#include <linux/refcount.h>
 
 struct mpoa_client;
 
@@ -25,7 +26,7 @@ typedef struct in_cache_entry {
 	struct   atm_vcc *shortcut;
 	uint8_t  MPS_ctrl_ATM_addr[ATM_ESA_LEN];
 	struct   in_ctrl_info ctrl_info;
-	atomic_t use;
+	refcount_t use;
 } in_cache_entry;
 
 struct in_cache_ops{
@@ -58,7 +59,7 @@ typedef struct eg_cache_entry{
 	uint16_t             entry_state;
 	__be32             latest_ip_addr;    /* The src IP address of the last packet */
 	struct eg_ctrl_info  ctrl_info;
-	atomic_t             use;
+	refcount_t             use;
 } eg_cache_entry;
 
 struct eg_cache_ops{
diff --git a/net/atm/pppoatm.c b/net/atm/pppoatm.c
index c4e09846d1de..21d9d341a619 100644
--- a/net/atm/pppoatm.c
+++ b/net/atm/pppoatm.c
@@ -350,7 +350,7 @@ static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
 		return 1;
 	}
 
-	atomic_add(skb->truesize, &sk_atm(ATM_SKB(skb)->vcc)->sk_wmem_alloc);
+	refcount_add(skb->truesize, &sk_atm(ATM_SKB(skb)->vcc)->sk_wmem_alloc);
 	ATM_SKB(skb)->atm_options = ATM_SKB(skb)->vcc->atm_options;
 	pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n",
 		 skb, ATM_SKB(skb)->vcc, ATM_SKB(skb)->vcc->dev);
diff --git a/net/atm/proc.c b/net/atm/proc.c
index bbb6461a4b7f..4caca2a90ec4 100644
--- a/net/atm/proc.c
+++ b/net/atm/proc.c
@@ -61,7 +61,7 @@ static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
 	add_stats(seq, "0", &dev->stats.aal0);
 	seq_puts(seq, "  ");
 	add_stats(seq, "5", &dev->stats.aal5);
-	seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
+	seq_printf(seq, "\t[%d]", refcount_read(&dev->refcnt));
 	seq_putc(seq, '\n');
 }
 
@@ -211,7 +211,7 @@ static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
 		   vcc->flags, sk->sk_err,
 		   sk_wmem_alloc_get(sk), sk->sk_sndbuf,
 		   sk_rmem_alloc_get(sk), sk->sk_rcvbuf,
-		   atomic_read(&sk->sk_refcnt));
+		   refcount_read(&sk->sk_refcnt));
 }
 
 static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
diff --git a/net/atm/raw.c b/net/atm/raw.c
index 2e17e97a7a8b..821c0797553d 100644
--- a/net/atm/raw.c
+++ b/net/atm/raw.c
@@ -35,7 +35,7 @@ static void atm_pop_raw(struct atm_vcc *vcc, struct sk_buff *skb)
 
 	pr_debug("(%d) %d -= %d\n",
 		 vcc->vci, sk_wmem_alloc_get(sk), skb->truesize);
-	atomic_sub(skb->truesize, &sk->sk_wmem_alloc);
+	WARN_ON(refcount_sub_and_test(skb->truesize, &sk->sk_wmem_alloc));
 	dev_kfree_skb_any(skb);
 	sk->sk_write_space(sk);
 }
diff --git a/net/atm/resources.c b/net/atm/resources.c
index 0447d5d0b639..918244757b7d 100644
--- a/net/atm/resources.c
+++ b/net/atm/resources.c
@@ -109,7 +109,7 @@ struct atm_dev *atm_dev_register(const char *type, struct device *parent,
 	else
 		memset(&dev->flags, 0, sizeof(dev->flags));
 	memset(&dev->stats, 0, sizeof(dev->stats));
-	atomic_set(&dev->refcnt, 1);
+	refcount_set(&dev->refcnt, 1);
 
 	if (atm_proc_dev_register(dev) < 0) {
 		pr_err("atm_proc_dev_register failed for dev %s\n", type);
diff --git a/net/atm/signaling.c b/net/atm/signaling.c
index adb6e3d21b1e..983c3a21a133 100644
--- a/net/atm/signaling.c
+++ b/net/atm/signaling.c
@@ -67,7 +67,7 @@ static int sigd_send(struct atm_vcc *vcc, struct sk_buff *skb)
 	struct sock *sk;
 
 	msg = (struct atmsvc_msg *) skb->data;
-	atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+	WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
 	vcc = *(struct atm_vcc **) &msg->vcc;
 	pr_debug("%d (0x%lx)\n", (int)msg->type, (unsigned long)vcc);
 	sk = sk_atm(vcc);
@@ -150,8 +150,7 @@ void sigd_enq2(struct atm_vcc *vcc, enum atmsvc_msg_type type,
 	pr_debug("%d (0x%p)\n", (int)type, vcc);
 	while (!(skb = alloc_skb(sizeof(struct atmsvc_msg), GFP_KERNEL)))
 		schedule();
-	msg = (struct atmsvc_msg *)skb_put(skb, sizeof(struct atmsvc_msg));
-	memset(msg, 0, sizeof(*msg));
+	msg = skb_put_zero(skb, sizeof(struct atmsvc_msg));
 	msg->type = type;
 	*(struct atm_vcc **) &msg->vcc = vcc;
 	*(struct atm_vcc **) &msg->listen_vcc = listen_vcc;