Subject: [PATCH] loopback: Improve the loopback device so I can more easily allocate multiple instances.
From: Eric W. Biederman <ebiederman@lnxi.com>
Date: 1135188495 -0700

---

 drivers/net/loopback.c |   16 +++++++++++++---
 1 files changed, 13 insertions(+), 3 deletions(-)

44d1673cc5348db79f9663089fd8de60f3444041
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index 193e009..1a427a4 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -40,7 +40,6 @@
 #include <linux/fcntl.h>
 #include <linux/in.h>
 #include <linux/init.h>
-#include <linux/nethost.h>
 
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -208,11 +207,10 @@ static void loopback_uninit(struct net_d
 }
 
 /* Setup and register the loopback device. */
-int loopback_init(struct net_device *dev)
+static int loopback_init(struct net_device *dev)
 {
 	struct net_device_stats *stats;
 
-	strcpy(dev->name, (dev == &init_host.loopback_dev)?"lo": "lo%d");
 	dev->mtu			= (16 * 1024) + 20 + 20 + 12;
 	dev->uninit			= loopback_uninit;
 	dev->hard_start_xmit		= loopback_xmit;
@@ -242,3 +240,15 @@ int loopback_init(struct net_device *dev
 	}
 	return 0;
 };
+
+int loopback_setup(struct net_device *dev)
+{
+	static int instance;
+
+	strcpy(dev->name, "lo");
+	if (instance++) {
+		snprintf(dev->name, sizeof(dev->name), "lo%d", instance);
+	}
+	dev->init = loopback_init;
+	return register_netdevice(dev);
+}
-- 
1.0.GIT