int cdev_add( struct cdev *dev, dev_t num, unsigned int count); 2.6内核字符设备驱动移除要用: void cdev_del( struct cdev *dev ); 2.6内核驱动注册完后,要用以下代码创建设备文件 devfs_mk_cdev( MKDEV(LED_MAJOR, LED_MINOR), S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP, DEVICE_NAME); 2.6...