[ATALK]: Add alloc_ltalkdev().

this matches the API used by other link layer like ethernet or token
ring.

Signed-off-by: Christoph Hellwig <[e-mail]>
Acked-by: Arnaldo Carvalho de Melo <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/appletalk/cops.c

···
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>
 #include <linux/if_arp.h>
-#include <linux/if_ltalk.h>	/* For ltalk_setup() */
+#include <linux/if_ltalk.h>
 #include <linux/delay.h>	/* For udelay() */
 #include <linux/atalk.h>
 #include <linux/spinlock.h>
···
 	int base_addr;
 	int err = 0;
 
-	dev = alloc_netdev(sizeof(struct cops_local), "lt%d", ltalk_setup);
+	dev = alloc_ltalkdev(sizeof(struct cops_local));
 	if (!dev)
 		return ERR_PTR(-ENOMEM);
 

drivers/net/appletalk/ltpc.c

···
 	unsigned long f;
 	unsigned long timeout;
 
-	dev = alloc_netdev(sizeof(struct ltpc_private), "lt%d", ltalk_setup);
+	dev = alloc_ltalkdev(sizeof(struct ltpc_private));
 	if (!dev)
 		goto out;
 

include/linux/if_ltalk.h

···
 #define LTALK_ALEN		1
 
 #ifdef __KERNEL__
-extern void ltalk_setup(struct net_device *);
+extern struct net_device *alloc_ltalkdev(int sizeof_priv);
 #endif
 
 #endif

net/appletalk/dev.c

···
 	return -EINVAL;
 }
 
-void ltalk_setup(struct net_device *dev)
+static void ltalk_setup(struct net_device *dev)
 {
 	/* Fill in the fields of the device structure with localtalk-generic values. */
 	
···
 
 	dev->flags		= IFF_BROADCAST|IFF_MULTICAST|IFF_NOARP;
 }
-EXPORT_SYMBOL(ltalk_setup);
+
+/**
+ * alloc_ltalkdev - Allocates and sets up an localtalk device
+ * @sizeof_priv: Size of additional driver-private structure to be allocated
+ *	for this localtalk device
+ *
+ * Fill in the fields of the device structure with localtalk-generic
+ * values. Basically does everything except registering the device.
+ *
+ * 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_ltalkdev(int sizeof_priv)
+{
+	return alloc_netdev(sizeof_priv, "lt%d", ltalk_setup);
+}
+EXPORT_SYMBOL(alloc_ltalkdev);