Hi, all There is a question that there is struct kobject embed in struct cdev, and struct device. Does it is better that a struct device is embedded in a a struct cdev directly? Kind Regards Bill Wang -- To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs