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authorDavid S. Miller <davem@davemloft.net>2008-07-08 23:13:53 -0700
committerDavid S. Miller <davem@davemloft.net>2008-07-08 23:13:53 -0700
commitc773e847ea8f6812804e40f52399c6921a00eab1 (patch)
tree952e0e262cc0b0f2136bc2a62938ae1d186f896a /net
parenteb6aafe3f843cb0e939546c03540a3b4911b6964 (diff)
downloadkernel-c773e847ea8f6812804e40f52399c6921a00eab1.tar.gz
netdev: Move _xmit_lock and xmit_lock_owner into netdev_queue.
Accesses are mostly structured such that when there are multiple TX queues the code transformations will be a little bit simpler. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/8021q/vlan_dev.c15
-rw-r--r--net/core/dev.c28
-rw-r--r--net/netrom/af_netrom.c12
-rw-r--r--net/rose/af_rose.c12
-rw-r--r--net/sched/sch_generic.c9
5 files changed, 59 insertions, 17 deletions
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index b6e52c025fd8..8efa399823e3 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -627,6 +627,18 @@ static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
*/
static struct lock_class_key vlan_netdev_xmit_lock_key;
+static void vlan_dev_set_lockdep_one(struct netdev_queue *txq,
+ int subclass)
+{
+ lockdep_set_class_and_subclass(&txq->_xmit_lock,
+ &vlan_netdev_xmit_lock_key, subclass);
+}
+
+static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
+{
+ vlan_dev_set_lockdep_one(&dev->tx_queue, subclass);
+}
+
static const struct header_ops vlan_header_ops = {
.create = vlan_dev_hard_header,
.rebuild = vlan_dev_rebuild_header,
@@ -668,8 +680,7 @@ static int vlan_dev_init(struct net_device *dev)
if (is_vlan_dev(real_dev))
subclass = 1;
- lockdep_set_class_and_subclass(&dev->_xmit_lock,
- &vlan_netdev_xmit_lock_key, subclass);
+ vlan_dev_set_lockdep_class(dev, subclass);
return 0;
}
diff --git a/net/core/dev.c b/net/core/dev.c
index 0218b0b9be80..a29a359b15d1 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -258,7 +258,7 @@ DEFINE_PER_CPU(struct softnet_data, softnet_data);
#ifdef CONFIG_DEBUG_LOCK_ALLOC
/*
- * register_netdevice() inits dev->_xmit_lock and sets lockdep class
+ * register_netdevice() inits txq->_xmit_lock and sets lockdep class
* according to dev->type
*/
static const unsigned short netdev_lock_type[] =
@@ -1758,19 +1758,19 @@ gso:
if (dev->flags & IFF_UP) {
int cpu = smp_processor_id(); /* ok because BHs are off */
- if (dev->xmit_lock_owner != cpu) {
+ if (txq->xmit_lock_owner != cpu) {
- HARD_TX_LOCK(dev, cpu);
+ HARD_TX_LOCK(dev, txq, cpu);
if (!netif_queue_stopped(dev) &&
!netif_subqueue_stopped(dev, skb)) {
rc = 0;
if (!dev_hard_start_xmit(skb, dev)) {
- HARD_TX_UNLOCK(dev);
+ HARD_TX_UNLOCK(dev, txq);
goto out;
}
}
- HARD_TX_UNLOCK(dev);
+ HARD_TX_UNLOCK(dev, txq);
if (net_ratelimit())
printk(KERN_CRIT "Virtual device %s asks to "
"queue packet!\n", dev->name);
@@ -3761,6 +3761,20 @@ static void rollback_registered(struct net_device *dev)
dev_put(dev);
}
+static void __netdev_init_queue_locks_one(struct netdev_queue *dev_queue,
+ struct net_device *dev)
+{
+ spin_lock_init(&dev_queue->_xmit_lock);
+ netdev_set_lockdep_class(&dev_queue->_xmit_lock, dev->type);
+ dev_queue->xmit_lock_owner = -1;
+}
+
+static void netdev_init_queue_locks(struct net_device *dev)
+{
+ __netdev_init_queue_locks_one(&dev->tx_queue, dev);
+ __netdev_init_queue_locks_one(&dev->rx_queue, dev);
+}
+
/**
* register_netdevice - register a network device
* @dev: device to register
@@ -3795,9 +3809,7 @@ int register_netdevice(struct net_device *dev)
BUG_ON(!dev_net(dev));
net = dev_net(dev);
- spin_lock_init(&dev->_xmit_lock);
- netdev_set_lockdep_class(&dev->_xmit_lock, dev->type);
- dev->xmit_lock_owner = -1;
+ netdev_init_queue_locks(dev);
dev->iflink = -1;
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 74884f4a6255..819afc449e1e 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -74,6 +74,16 @@ static const struct proto_ops nr_proto_ops;
*/
static struct lock_class_key nr_netdev_xmit_lock_key;
+static void nr_set_lockdep_one(struct netdev_queue *txq)
+{
+ lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key);
+}
+
+static void nr_set_lockdep_key(struct net_device *dev)
+{
+ nr_set_lockdep_one(&dev->tx_queue);
+}
+
/*
* Socket removal during an interrupt is now safe.
*/
@@ -1430,7 +1440,7 @@ static int __init nr_proto_init(void)
free_netdev(dev);
goto fail;
}
- lockdep_set_class(&dev->_xmit_lock, &nr_netdev_xmit_lock_key);
+ nr_set_lockdep_key(dev);
dev_nr[i] = dev;
}
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 46461a69cd0f..7dbbc0891623 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -75,6 +75,16 @@ ax25_address rose_callsign;
*/
static struct lock_class_key rose_netdev_xmit_lock_key;
+static void rose_set_lockdep_one(struct netdev_queue *txq)
+{
+ lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
+}
+
+static void rose_set_lockdep_key(struct net_device *dev)
+{
+ rose_set_lockdep_one(&dev->tx_queue);
+}
+
/*
* Convert a ROSE address into text.
*/
@@ -1576,7 +1586,7 @@ static int __init rose_proto_init(void)
free_netdev(dev);
goto fail;
}
- lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
+ rose_set_lockdep_key(dev);
dev_rose[i] = dev;
}
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index fcc7533f0bcc..b6a36d394663 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -92,10 +92,9 @@ static inline int handle_dev_cpu_collision(struct sk_buff *skb,
struct netdev_queue *dev_queue,
struct Qdisc *q)
{
- struct net_device *dev = dev_queue->dev;
int ret;
- if (unlikely(dev->xmit_lock_owner == smp_processor_id())) {
+ if (unlikely(dev_queue->xmit_lock_owner == smp_processor_id())) {
/*
* Same CPU holding the lock. It may be a transient
* configuration error, when hard_start_xmit() recurses. We
@@ -105,7 +104,7 @@ static inline int handle_dev_cpu_collision(struct sk_buff *skb,
kfree_skb(skb);
if (net_ratelimit())
printk(KERN_WARNING "Dead loop on netdevice %s, "
- "fix it urgently!\n", dev->name);
+ "fix it urgently!\n", dev_queue->dev->name);
ret = qdisc_qlen(q);
} else {
/*
@@ -155,10 +154,10 @@ static inline int qdisc_restart(struct netdev_queue *txq)
dev = txq->dev;
- HARD_TX_LOCK(dev, smp_processor_id());
+ HARD_TX_LOCK(dev, txq, smp_processor_id());
if (!netif_subqueue_stopped(dev, skb))
ret = dev_hard_start_xmit(skb, dev);
- HARD_TX_UNLOCK(dev);
+ HARD_TX_UNLOCK(dev, txq);
spin_lock(&txq->lock);
q = txq->qdisc;