diff -Naur linux.org/include/linux/netdevice.h linux.netdev_printk.patched/include/linux/netdevice.h
--- linux.org/include/linux/netdevice.h	Thu May  1 08:46:13 2003
+++ linux.netdev_printk.patched/include/linux/netdevice.h	Thu May  1 08:46:13 2003
@@ -28,7 +28,7 @@
 #include <linux/if.h>
 #include <linux/if_ether.h>
 #include <linux/if_packet.h>
-#include <linux/kobject.h>
+#include <linux/device.h>
 
 #include <asm/atomic.h>
 #include <asm/cache.h>
@@ -269,6 +269,7 @@
 	unsigned long		state;
 
 	struct net_device	*next;
+	struct device		*dev;		/* underlying device */
 	
 	/* The device initialization function. Called only once. */
 	int			(*init)(struct net_device *dev);
@@ -835,6 +836,32 @@
 extern void		dev_clear_fastroute(struct net_device *dev);
 #endif
 
+/* debugging and troubleshooting/diagnostic helpers. */
+/**
+ * netdev_printk() - Log message with interface name, driver name, bus ID.
+ * @level: severity level -- e.g., KERN_INFO
+ * @netdev: net_device pointer
+ * @format: as with printk
+ * @args: as with printk
+ */
+#define netdev_printk(level, netdev, format, arg...)	\
+	printk(level "%s %s %s: " format , (netdev)->name ,	\
+		((netdev)->dev ? (netdev)->dev->driver->name : "") ,	\
+		((netdev)->dev ? (netdev)->dev->bus_id : "") , ## arg)
+
+#ifdef DEBUG
+#define netdev_dbg(netdev, format, arg...)		\
+	netdev_printk(KERN_DEBUG , netdev , format , ## arg)
+#else
+#define netdev_dbg(netdev, format, arg...) do {} while (0)
+#endif
+
+#define netdev_err(netdev, format, arg...)		\
+	netdev_printk(KERN_ERR , netdev , format , ## arg)
+#define netdev_info(netdev, format, arg...)		\
+	netdev_printk(KERN_INFO , netdev , format , ## arg)
+#define netdev_warn(netdev, format, arg...)		\
+	netdev_printk(KERN_WARNING , netdev , format , ## arg)
 
 #endif /* __KERNEL__ */