Merge branch 'linus' into perfcounters/core

Conflicts:
	arch/x86/include/asm/kmap_types.h
	include/linux/mm.h

	include/asm-generic/kmap_types.h

Merge reason: We crossed changes with kmap_types.h cleanups in mainline.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

7 files changed, 65 insertions, 59 deletions

diff --git a/net/bridge/br.c b/net/bridge/br.c
index 4d2c1f1cb52..9aac5213105 100644
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -65,8 +65,9 @@ static int __init br_init(void)
 	brioctl_set(br_ioctl_deviceless_stub);
 	br_handle_frame_hook = br_handle_frame;
 
-	br_fdb_get_hook = br_fdb_get;
-	br_fdb_put_hook = br_fdb_put;
+#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
+	br_fdb_test_addr_hook = br_fdb_test_addr;
+#endif
 
 	return 0;
 err_out4:
@@ -95,8 +96,9 @@ static void __exit br_deinit(void)
 	synchronize_net();
 
 	br_netfilter_fini();
-	br_fdb_get_hook = NULL;
-	br_fdb_put_hook = NULL;
+#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
+	br_fdb_test_addr_hook = NULL;
+#endif
 
 	br_handle_frame_hook = NULL;
 	br_fdb_fini();
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index a48f5efdb6b..57bf05c353b 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -71,10 +71,17 @@ static inline int br_mac_hash(const unsigned char *mac)
 	return jhash_1word(key, fdb_salt) & (BR_HASH_SIZE - 1);
 }
 
+static void fdb_rcu_free(struct rcu_head *head)
+{
+	struct net_bridge_fdb_entry *ent
+		= container_of(head, struct net_bridge_fdb_entry, rcu);
+	kmem_cache_free(br_fdb_cache, ent);
+}
+
 static inline void fdb_delete(struct net_bridge_fdb_entry *f)
 {
 	hlist_del_rcu(&f->hlist);
-	br_fdb_put(f);
+	call_rcu(&f->rcu, fdb_rcu_free);
 }
 
 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr)
@@ -226,33 +233,26 @@ struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 	return NULL;
 }
 
-/* Interface used by ATM hook that keeps a ref count */
-struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
-					unsigned char *addr)
+#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
+/* Interface used by ATM LANE hook to test
+ * if an addr is on some other bridge port */
+int br_fdb_test_addr(struct net_device *dev, unsigned char *addr)
 {
 	struct net_bridge_fdb_entry *fdb;
+	int ret;
+
+	if (!dev->br_port)
+		return 0;
 
 	rcu_read_lock();
-	fdb = __br_fdb_get(br, addr);
-	if (fdb && !atomic_inc_not_zero(&fdb->use_count))
-		fdb = NULL;
+	fdb = __br_fdb_get(dev->br_port->br, addr);
+	ret = fdb && fdb->dst->dev != dev &&
+		fdb->dst->state == BR_STATE_FORWARDING;
 	rcu_read_unlock();
-	return fdb;
-}
-
-static void fdb_rcu_free(struct rcu_head *head)
-{
-	struct net_bridge_fdb_entry *ent
-		= container_of(head, struct net_bridge_fdb_entry, rcu);
-	kmem_cache_free(br_fdb_cache, ent);
-}
 
-/* Set entry up for deletion with RCU  */
-void br_fdb_put(struct net_bridge_fdb_entry *ent)
-{
-	if (atomic_dec_and_test(&ent->use_count))
-		call_rcu(&ent->rcu, fdb_rcu_free);
+	return ret;
 }
+#endif /* CONFIG_ATM_LANE */
 
 /*
  * Fill buffer with forwarding table records in
@@ -326,7 +326,6 @@ static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
 	fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC);
 	if (fdb) {
 		memcpy(fdb->addr.addr, addr, ETH_ALEN);
-		atomic_set(&fdb->use_count, 1);
 		hlist_add_head_rcu(&fdb->hlist, head);
 
 		fdb->dst = source;
@@ -398,7 +397,7 @@ void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 		if (unlikely(fdb->is_local)) {
 			if (net_ratelimit())
 				printk(KERN_WARNING "%s: received packet with "
-				       " own address as source address\n",
+				       "own address as source address\n",
 				       source->dev->name);
 		} else {
 			/* fastpath: update of existing entry */
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index e4a418fcb35..d22f611e400 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -228,6 +228,7 @@ int nf_bridge_copy_header(struct sk_buff *skb)
 static int br_nf_pre_routing_finish_ipv6(struct sk_buff *skb)
 {
 	struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+	struct rtable *rt;
 
 	if (nf_bridge->mask & BRNF_PKT_TYPE) {
 		skb->pkt_type = PACKET_OTHERHOST;
@@ -235,12 +236,13 @@ static int br_nf_pre_routing_finish_ipv6(struct sk_buff *skb)
 	}
 	nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
 
-	skb->rtable = bridge_parent_rtable(nf_bridge->physindev);
-	if (!skb->rtable) {
+	rt = bridge_parent_rtable(nf_bridge->physindev);
+	if (!rt) {
 		kfree_skb(skb);
 		return 0;
 	}
-	dst_hold(&skb->rtable->u.dst);
+	dst_hold(&rt->u.dst);
+	skb_dst_set(skb, &rt->u.dst);
 
 	skb->dev = nf_bridge->physindev;
 	nf_bridge_push_encap_header(skb);
@@ -320,7 +322,7 @@ static int br_nf_pre_routing_finish_bridge(struct sk_buff *skb)
 
 	skb->dev = bridge_parent(skb->dev);
 	if (skb->dev) {
-		struct dst_entry *dst = skb->dst;
+		struct dst_entry *dst = skb_dst(skb);
 
 		nf_bridge_pull_encap_header(skb);
 
@@ -338,6 +340,7 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb)
 	struct net_device *dev = skb->dev;
 	struct iphdr *iph = ip_hdr(skb);
 	struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+	struct rtable *rt;
 	int err;
 
 	if (nf_bridge->mask & BRNF_PKT_TYPE) {
@@ -347,7 +350,6 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb)
 	nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
 	if (dnat_took_place(skb)) {
 		if ((err = ip_route_input(skb, iph->daddr, iph->saddr, iph->tos, dev))) {
-			struct rtable *rt;
 			struct flowi fl = {
 				.nl_u = {
 					.ip4_u = {
@@ -373,7 +375,7 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb)
 				/* - Bridged-and-DNAT'ed traffic doesn't
 				 *   require ip_forwarding. */
 				if (((struct dst_entry *)rt)->dev == dev) {
-					skb->dst = (struct dst_entry *)rt;
+					skb_dst_set(skb, (struct dst_entry *)rt);
 					goto bridged_dnat;
 				}
 				/* we are sure that forwarding is disabled, so printing
@@ -387,7 +389,7 @@ free_skb:
 			kfree_skb(skb);
 			return 0;
 		} else {
-			if (skb->dst->dev == dev) {
+			if (skb_dst(skb)->dev == dev) {
 bridged_dnat:
 				/* Tell br_nf_local_out this is a
 				 * bridged frame */
@@ -404,12 +406,13 @@ bridged_dnat:
 			skb->pkt_type = PACKET_HOST;
 		}
 	} else {
-		skb->rtable = bridge_parent_rtable(nf_bridge->physindev);
-		if (!skb->rtable) {
+		rt = bridge_parent_rtable(nf_bridge->physindev);
+		if (!rt) {
 			kfree_skb(skb);
 			return 0;
 		}
-		dst_hold(&skb->rtable->u.dst);
+		dst_hold(&rt->u.dst);
+		skb_dst_set(skb, &rt->u.dst);
 	}
 
 	skb->dev = nf_bridge->physindev;
@@ -628,10 +631,10 @@ static unsigned int br_nf_local_in(unsigned int hook, struct sk_buff *skb,
 				   const struct net_device *out,
 				   int (*okfn)(struct sk_buff *))
 {
-	if (skb->rtable && skb->rtable == bridge_parent_rtable(in)) {
-		dst_release(&skb->rtable->u.dst);
-		skb->rtable = NULL;
-	}
+	struct rtable *rt = skb_rtable(skb);
+
+	if (rt && rt == bridge_parent_rtable(in))
+		skb_dst_drop(skb);
 
 	return NF_ACCEPT;
 }
@@ -846,7 +849,7 @@ static unsigned int br_nf_post_routing(unsigned int hook, struct sk_buff *skb,
 		return NF_ACCEPT;
 
 #ifdef CONFIG_NETFILTER_DEBUG
-	if (skb->dst == NULL) {
+	if (skb_dst(skb) == NULL) {
 		printk(KERN_INFO "br_netfilter post_routing: skb->dst == NULL\n");
 		goto print_error;
 	}
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index b6c3b71974d..d5b5537272b 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -51,7 +51,6 @@ struct net_bridge_fdb_entry
 	struct net_bridge_port		*dst;
 
 	struct rcu_head			rcu;
-	atomic_t			use_count;
 	unsigned long			ageing_timer;
 	mac_addr			addr;
 	unsigned char			is_local;
@@ -154,9 +153,7 @@ extern void br_fdb_delete_by_port(struct net_bridge *br,
 				  const struct net_bridge_port *p, int do_all);
 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 						 const unsigned char *addr);
-extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
-					       unsigned char *addr);
-extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
+extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
 			  unsigned long count, unsigned long off);
 extern int br_fdb_insert(struct net_bridge *br,
@@ -242,10 +239,9 @@ extern void br_stp_port_timer_init(struct net_bridge_port *p);
 extern unsigned long br_timer_value(const struct timer_list *timer);
 
 /* br.c */
-extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
-						       unsigned char *addr);
-extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
-
+#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
+extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
+#endif
 
 /* br_netlink.c */
 extern int br_netlink_init(void);
diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
index 603d89248e7..ee4820aa184 100644
--- a/net/bridge/br_sysfs_br.c
+++ b/net/bridge/br_sysfs_br.c
@@ -172,7 +172,8 @@ static ssize_t store_stp_state(struct device *d,
 	if (endp == buf)
 		return -EINVAL;
 
-	rtnl_lock();
+	if (!rtnl_trylock())
+		return restart_syscall();
 	br_stp_set_enabled(br, val);
 	rtnl_unlock();
 
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index 02b2d50cce4..4a3cdf8f381 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -189,7 +189,8 @@ static ssize_t brport_store(struct kobject * kobj,
 
 	val = simple_strtoul(buf, &endp, 0);
 	if (endp != buf) {
-		rtnl_lock();
+		if (!rtnl_trylock())
+			return restart_syscall();
 		if (p->dev && p->br && brport_attr->store) {
 			spin_lock_bh(&p->br->lock);
 			ret = brport_attr->store(p, val);
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 820252aee81..37928d5f284 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -142,6 +142,12 @@ static inline int ebt_basic_match(struct ebt_entry *e, struct ethhdr *h,
 	return 0;
 }
 
+static inline __pure
+struct ebt_entry *ebt_next_entry(const struct ebt_entry *entry)
+{
+	return (void *)entry + entry->next_offset;
+}
+
 /* Do some firewalling */
 unsigned int ebt_do_table (unsigned int hook, struct sk_buff *skb,
    const struct net_device *in, const struct net_device *out,
@@ -164,7 +170,7 @@ unsigned int ebt_do_table (unsigned int hook, struct sk_buff *skb,
 	mtpar.in      = tgpar.in  = in;
 	mtpar.out     = tgpar.out = out;
 	mtpar.hotdrop = &hotdrop;
-	tgpar.hooknum = hook;
+	mtpar.hooknum = tgpar.hooknum = hook;
 
 	read_lock_bh(&table->lock);
 	private = table->private;
@@ -249,8 +255,7 @@ letsreturn:
 		/* jump to a udc */
 		cs[sp].n = i + 1;
 		cs[sp].chaininfo = chaininfo;
-		cs[sp].e = (struct ebt_entry *)
-		   (((char *)point) + point->next_offset);
+		cs[sp].e = ebt_next_entry(point);
 		i = 0;
 		chaininfo = (struct ebt_entries *) (base + verdict);
 #ifdef CONFIG_NETFILTER_DEBUG
@@ -266,8 +271,7 @@ letsreturn:
 		sp++;
 		continue;
 letscontinue:
-		point = (struct ebt_entry *)
-		   (((char *)point) + point->next_offset);
+		point = ebt_next_entry(point);
 		i++;
 	}
 
@@ -787,7 +791,7 @@ static int check_chainloops(struct ebt_entries *chain, struct ebt_cl_stack *cl_s
 			/* this can't be 0, so the loop test is correct */
 			cl_s[i].cs.n = pos + 1;
 			pos = 0;
-			cl_s[i].cs.e = ((void *)e + e->next_offset);
+			cl_s[i].cs.e = ebt_next_entry(e);
 			e = (struct ebt_entry *)(hlp2->data);
 			nentries = hlp2->nentries;
 			cl_s[i].from = chain_nr;
@@ -797,7 +801,7 @@ static int check_chainloops(struct ebt_entries *chain, struct ebt_cl_stack *cl_s
 			continue;
 		}
 letscontinue:
-		e = (void *)e + e->next_offset;
+		e = ebt_next_entry(e);
 		pos++;
 	}
 	return 0;