+static int kni_net_id;
+
+struct kni_net {
+ unsigned long device_in_use; /* device in use flag */
+ struct task_struct *kni_kthread;
+ struct rw_semaphore kni_list_lock;
+ struct list_head kni_list_head;
+};
+
+static int __net_init kni_init_net(struct net *net)
+{
+#ifdef HAVE_SIMPLIFIED_PERNET_OPERATIONS
+ struct kni_net *knet = net_generic(net, kni_net_id);
+#else
+ struct kni_net *knet;
+ int ret;
+
+ knet = kmalloc(sizeof(struct kni_net), GFP_KERNEL);
+ if (!knet) {
+ ret = -ENOMEM;
+ return ret;
+ }
+#endif
+
+ /* Clear the bit of device in use */
+ clear_bit(KNI_DEV_IN_USE_BIT_NUM, &knet->device_in_use);
+
+ init_rwsem(&knet->kni_list_lock);
+ INIT_LIST_HEAD(&knet->kni_list_head);
+
+#ifdef HAVE_SIMPLIFIED_PERNET_OPERATIONS
+ return 0;
+#else
+ ret = net_assign_generic(net, kni_net_id, knet);
+ if (ret < 0)
+ kfree(knet);
+
+ return ret;
+#endif
+}
+
+static void __net_exit kni_exit_net(struct net *net)
+{
+#ifndef HAVE_SIMPLIFIED_PERNET_OPERATIONS
+ struct kni_net *knet = net_generic(net, kni_net_id);