Workqueue attempt, but fails to insmod, already loaded??

kernel_module/workqueue_cheat.c

@@ -0,0 +1,36 @@
+
+/*
+Usage:
+
+	insmod /workqueue.ko
+	# dmesg => worker
+	rmmod workqueue
+
+Creates a separate thread. So init_module can return, but some work will still get done.
+*/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/workqueue.h>
+
+MODULE_LICENSE("GPL");
+
+static struct workqueue_struct *queue;
+
+static void worker_func(struct work_struct *work)
+{
+	printk(KERN_INFO "worker\n");
+}
+
+int init_module(void)
+{
+	DECLARE_WORK(work, worker_func);
+	queue = create_singlethread_workqueue("myworkqueue");
+	queue_work(queue, &work);
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	destroy_workqueue(queue);
+}