v2.4.2.7 -> v2.4.2.8

  - Paul Mackerras: PPC update for thread-safe page table handling
  - Ingo Molnar: x86 PAE update for thread-safe page table handling
  - Jeff Garzik: network driver updates, i810 rng driver, and
  "alloc_etherdev()" network driver insert race condition fix.
  - David Miller: UltraSparcIII update, network locking fixes
  - Al Viro: fix fs counts on mount failure

1 files changed, 233 insertions, 36 deletions

diff --git a/drivers/net/net_init.c b/drivers/net/net_init.c
index 8bc98840e9f4..46bea969c69f 100644
--- a/drivers/net/net_init.c
+++ b/drivers/net/net_init.c
@@ -28,10 +28,12 @@
 			up. We now share common code and have regularised name
 			allocation setups. Abolished the 16 card limits.
 	03/19/2000 - jgarzik and Urban Widmark: init_etherdev 32-byte align
+	03/21/2001 - jgarzik: alloc_etherdev and friends
 
 */
 
 #include <linux/config.h>
+#include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/types.h>
@@ -68,6 +70,33 @@
 */
 
 
+static struct net_device *alloc_netdev(int sizeof_priv, const char *mask,
+				       void (*setup)(struct net_device *))
+{
+	struct net_device *dev;
+	int alloc_size;
+
+	/* ensure 32-byte alignment of the private area */
+	alloc_size = sizeof (*dev) + sizeof_priv + 31;
+
+	dev = (struct net_device *) kmalloc (alloc_size, GFP_KERNEL);
+	if (dev == NULL)
+	{
+		printk(KERN_ERR "alloc_dev: Unable to allocate device memory.\n");
+		return NULL;
+	}
+
+	memset(dev, 0, alloc_size);
+
+	if (sizeof_priv)
+		dev->priv = (void *) (((long)(dev + 1) + 31) & ~31);
+
+	setup(dev);
+	strcpy(dev->name, mask);
+
+	return dev;
+}
+
 static struct net_device *init_alloc_dev(int sizeof_priv)
 {
 	struct net_device *dev;
@@ -142,6 +171,17 @@ static struct net_device *init_netdev(struct net_device *dev, int sizeof_priv,
 	return dev;
 }
 
+static int __register_netdev(struct net_device *dev)
+{
+	dev_init_buffers(dev);
+	
+	if (dev->init && dev->init(dev) != 0) {
+		unregister_netdev(dev);
+		return -EIO;
+	}
+	return 0;
+}
+
 /**
  * init_etherdev - Register ethernet device
  * @dev: An ethernet device structure to be filled in, or %NULL if a new
@@ -164,6 +204,25 @@ struct net_device *init_etherdev(struct net_device *dev, int sizeof_priv)
 	return init_netdev(dev, sizeof_priv, "eth%d", ether_setup);
 }
 
+/**
+ * alloc_etherdev - Register ethernet device
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ *	for this ethernet device
+ *
+ * Fill in the fields of the device structure with ethernet-generic values.
+ *
+ * Constructs a new net device, complete with a private data area of
+ * size @sizeof_priv.  A 32-byte (not bit) alignment is enforced for
+ * this private data area.
+ */
+
+struct net_device *alloc_etherdev(int sizeof_priv)
+{
+	return alloc_netdev(sizeof_priv, "eth%d", ether_setup);
+}
+
+EXPORT_SYMBOL(init_etherdev);
+EXPORT_SYMBOL(alloc_etherdev);
 
 static int eth_mac_addr(struct net_device *dev, void *p)
 {
@@ -184,11 +243,48 @@ static int eth_change_mtu(struct net_device *dev, int new_mtu)
 
 #ifdef CONFIG_FDDI
 
+/**
+ * init_fddidev - Register FDDI device
+ * @dev: A FDDI device structure to be filled in, or %NULL if a new
+ *	struct should be allocated.
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ *	for this ethernet device
+ *
+ * Fill in the fields of the device structure with FDDI-generic values.
+ *
+ * If no device structure is passed, a new one is constructed, complete with
+ * a private data area of size @sizeof_priv.  A 32-byte (not bit)
+ * alignment is enforced for this private data area.
+ *
+ * If an empty string area is passed as dev->name, or a new structure is made,
+ * a new name string is constructed.
+ */
+
 struct net_device *init_fddidev(struct net_device *dev, int sizeof_priv)
 {
 	return init_netdev(dev, sizeof_priv, "fddi%d", fddi_setup);
 }
 
+/**
+ * alloc_fddidev - Register FDDI device
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ *	for this FDDI device
+ *
+ * Fill in the fields of the device structure with FDDI-generic values.
+ *
+ * Constructs a new net device, complete with a private data area of
+ * size @sizeof_priv.  A 32-byte (not bit) alignment is enforced for
+ * this private data area.
+ */
+
+struct net_device *alloc_fddidev(int sizeof_priv)
+{
+	return alloc_netdev(sizeof_priv, "fddi%d", fddi_setup);
+}
+
+EXPORT_SYMBOL(init_fddidev);
+EXPORT_SYMBOL(alloc_fddidev);
+
 static int fddi_change_mtu(struct net_device *dev, int new_mtu)
 {
 	if ((new_mtu < FDDI_K_SNAP_HLEN) || (new_mtu > FDDI_K_SNAP_DLEN))
@@ -227,19 +323,59 @@ static int hippi_mac_addr(struct net_device *dev, void *p)
 }
 
 
+/**
+ * init_hippi_dev - Register HIPPI device
+ * @dev: A HIPPI device structure to be filled in, or %NULL if a new
+ *	struct should be allocated.
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ *	for this ethernet device
+ *
+ * Fill in the fields of the device structure with HIPPI-generic values.
+ *
+ * If no device structure is passed, a new one is constructed, complete with
+ * a private data area of size @sizeof_priv.  A 32-byte (not bit)
+ * alignment is enforced for this private data area.
+ *
+ * If an empty string area is passed as dev->name, or a new structure is made,
+ * a new name string is constructed.
+ */
+
 struct net_device *init_hippi_dev(struct net_device *dev, int sizeof_priv)
 {
 	return init_netdev(dev, sizeof_priv, "hip%d", hippi_setup);
 }
 
+/**
+ * alloc_hippi_dev - Register HIPPI device
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ *	for this HIPPI device
+ *
+ * Fill in the fields of the device structure with HIPPI-generic values.
+ *
+ * Constructs a new net device, complete with a private data area of
+ * size @sizeof_priv.  A 32-byte (not bit) alignment is enforced for
+ * this private data area.
+ */
+
+struct net_device *alloc_hippi_dev(int sizeof_priv)
+{
+	return alloc_netdev(sizeof_priv, "hip%d", hippi_setup);
+}
+
+int register_hipdev(struct net_device *dev)
+{
+	return __register_netdev(dev);
+}
 
 void unregister_hipdev(struct net_device *dev)
 {
-	rtnl_lock();
-	unregister_netdevice(dev);
-	rtnl_unlock();
+	unregister_netdev(dev);
 }
 
+EXPORT_SYMBOL(init_hippi_dev);
+EXPORT_SYMBOL(alloc_hippi_dev);
+EXPORT_SYMBOL(register_hipdev);
+EXPORT_SYMBOL(unregister_hipdev);
 
 static int hippi_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p)
 {
@@ -283,6 +419,7 @@ void ether_setup(struct net_device *dev)
 
 	dev_init_buffers(dev);
 }
+EXPORT_SYMBOL(ether_setup);
 
 #ifdef CONFIG_FDDI
 
@@ -312,6 +449,7 @@ void fddi_setup(struct net_device *dev)
 	
 	return;
 }
+EXPORT_SYMBOL(fddi_setup);
 
 #endif /* CONFIG_FDDI */
 
@@ -349,6 +487,7 @@ void hippi_setup(struct net_device *dev)
 
 	dev_init_buffers(dev);
 }
+EXPORT_SYMBOL(hippi_setup);
 #endif /* CONFIG_HIPPI */
 
 #if defined(CONFIG_ATALK) || defined(CONFIG_ATALK_MODULE)
@@ -387,6 +526,7 @@ void ltalk_setup(struct net_device *dev)
 
 	dev_init_buffers(dev);
 }
+EXPORT_SYMBOL(ltalk_setup);
 
 #endif /* CONFIG_ATALK || CONFIG_ATALK_MODULE */
 
@@ -403,8 +543,8 @@ int register_netdev(struct net_device *dev)
 	 
 	if (strchr(dev->name, '%'))
 	{
-		err = -EBUSY;
-		if(dev_alloc_name(dev, dev->name)<0)
+		err = dev_alloc_name(dev, dev->name);
+		if (err < 0)
 			goto out;
 	}
 	
@@ -414,17 +554,12 @@ int register_netdev(struct net_device *dev)
 	
 	if (dev->name[0]==0 || dev->name[0]==' ')
 	{
-		err = -EBUSY;
-		if(dev_alloc_name(dev, "eth%d")<0)
+		err = dev_alloc_name(dev, "eth%d");
+		if (err < 0)
 			goto out;
 	}
-		
-		
-	err = -EIO;
-	if (register_netdevice(dev))
-		goto out;
 
-	err = 0;
+	err = register_netdevice(dev);
 
 out:
 	rtnl_unlock();
@@ -438,10 +573,12 @@ void unregister_netdev(struct net_device *dev)
 	rtnl_unlock();
 }
 
+EXPORT_SYMBOL(register_netdev);
+EXPORT_SYMBOL(unregister_netdev);
 
 #ifdef CONFIG_TR
 
-static void tr_configure(struct net_device *dev)
+void tr_setup(struct net_device *dev)
 {
 	/*
 	 *	Configure and register
@@ -462,32 +599,61 @@ static void tr_configure(struct net_device *dev)
 	dev->flags		= IFF_BROADCAST | IFF_MULTICAST ;
 }
 
+/**
+ * init_trdev - Register token ring device
+ * @dev: A token ring device structure to be filled in, or %NULL if a new
+ *	struct should be allocated.
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ *	for this ethernet device
+ *
+ * Fill in the fields of the device structure with token ring-generic values.
+ *
+ * If no device structure is passed, a new one is constructed, complete with
+ * a private data area of size @sizeof_priv.  A 32-byte (not bit)
+ * alignment is enforced for this private data area.
+ *
+ * If an empty string area is passed as dev->name, or a new structure is made,
+ * a new name string is constructed.
+ */
+
 struct net_device *init_trdev(struct net_device *dev, int sizeof_priv)
 {
-	return init_netdev(dev, sizeof_priv, "tr%d", tr_configure);
+	return init_netdev(dev, sizeof_priv, "tr%d", tr_setup);
 }
 
-void tr_setup(struct net_device *dev)
+/**
+ * alloc_trdev - Register token ring device
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ *	for this token ring device
+ *
+ * Fill in the fields of the device structure with token ring-generic values.
+ *
+ * Constructs a new net device, complete with a private data area of
+ * size @sizeof_priv.  A 32-byte (not bit) alignment is enforced for
+ * this private data area.
+ */
+
+struct net_device *alloc_trdev(int sizeof_priv)
 {
+	return alloc_netdev(sizeof_priv, "tr%d", tr_setup);
 }
 
 int register_trdev(struct net_device *dev)
 {
-	dev_init_buffers(dev);
-	
-	if (dev->init && dev->init(dev) != 0) {
-		unregister_trdev(dev);
-		return -EIO;
-	}
-	return 0;
+	return __register_netdev(dev);
 }
 
 void unregister_trdev(struct net_device *dev)
 {
-	rtnl_lock();
-	unregister_netdevice(dev);
-	rtnl_unlock();
+	unregister_netdev(dev);
 }
+
+EXPORT_SYMBOL(tr_setup);
+EXPORT_SYMBOL(init_trdev);
+EXPORT_SYMBOL(alloc_trdev);
+EXPORT_SYMBOL(register_trdev);
+EXPORT_SYMBOL(unregister_trdev);
+
 #endif /* CONFIG_TR */
 
 
@@ -509,31 +675,62 @@ void fc_setup(struct net_device *dev)
         /* New-style flags. */
         dev->flags              =        IFF_BROADCAST;
 	dev_init_buffers(dev);
-        return;
 }
 
+/**
+ * init_fcdev - Register fibre channel device
+ * @dev: A fibre channel device structure to be filled in, or %NULL if a new
+ *	struct should be allocated.
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ *	for this ethernet device
+ *
+ * Fill in the fields of the device structure with fibre channel-generic values.
+ *
+ * If no device structure is passed, a new one is constructed, complete with
+ * a private data area of size @sizeof_priv.  A 32-byte (not bit)
+ * alignment is enforced for this private data area.
+ *
+ * If an empty string area is passed as dev->name, or a new structure is made,
+ * a new name string is constructed.
+ */
 
 struct net_device *init_fcdev(struct net_device *dev, int sizeof_priv)
 {
 	return init_netdev(dev, sizeof_priv, "fc%d", fc_setup);
 }
 
+/**
+ * alloc_fcdev - Register fibre channel device
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ *	for this fibre channel device
+ *
+ * Fill in the fields of the device structure with fibre channel-generic values.
+ *
+ * Constructs a new net device, complete with a private data area of
+ * size @sizeof_priv.  A 32-byte (not bit) alignment is enforced for
+ * this private data area.
+ */
+
+struct net_device *alloc_fcdev(int sizeof_priv)
+{
+	return alloc_netdev(sizeof_priv, "fc%d", fc_setup);
+}
+
 int register_fcdev(struct net_device *dev)
 {
-        dev_init_buffers(dev);
-        if (dev->init && dev->init(dev) != 0) {
-                unregister_fcdev(dev);
-                return -EIO;
-        }
-        return 0;
+	return __register_netdev(dev);
 }                                               
         
 void unregister_fcdev(struct net_device *dev)
 {
-        rtnl_lock();
-	unregister_netdevice(dev);
-        rtnl_unlock();
+	unregister_netdev(dev);
 }
 
+EXPORT_SYMBOL(fc_setup);
+EXPORT_SYMBOL(init_fcdev);
+EXPORT_SYMBOL(alloc_fcdev);
+EXPORT_SYMBOL(register_fcdev);
+EXPORT_SYMBOL(unregister_fcdev);
+
 #endif /* CONFIG_NET_FC */