kthread, timer

kernel_module/work_from_work.c

@@ -0,0 +1,35 @@
+/*
+Declare more work from a workqueue.
+
+TODO: kernel panic. Why?
+*/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/workqueue.h>
+
+MODULE_LICENSE("GPL");
+
+static int i = 0;
+static struct workqueue_struct *queue;
+
+static void work_func(struct work_struct *work)
+{
+	DECLARE_DELAYED_WORK(next_work, work_func);
+	printk(KERN_INFO "%d\n", i);
+	i++;
+	queue_delayed_work(queue, &next_work, HZ);
+}
+
+int init_module(void)
+{
+	DECLARE_WORK(work, work_func);
+	queue = create_workqueue("myworkqueue");
+	queue_work(queue, &work);
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	destroy_workqueue(queue);
+}