+static void media_change_notify_thread(struct work_struct *work)
+{
+ struct gendisk *gd = container_of(work, struct gendisk, async_notify);
+ char event[] = "MEDIA_CHANGE=1";
+ char *envp[] = { event, NULL };
+
+ /*
+ * set enviroment vars to indicate which event this is for
+ * so that user space will know to go check the media status.
+ */
+ kobject_uevent_env(&gd->kobj, KOBJ_CHANGE, envp);
+ put_device(gd->driverfs_dev);
+}
+
+void genhd_media_change_notify(struct gendisk *disk)
+{
+ get_device(disk->driverfs_dev);
+ schedule_work(&disk->async_notify);
+}
+EXPORT_SYMBOL_GPL(genhd_media_change_notify);
+