struct cdev {struct kobject kobj;struct module *owner;const struct file_operations *ops;struct list_head list;dev_t dev;unsigned int count;};

struct cdev *cdev_alloc(void){struct cdev *p = kzalloc(sizeof(struct cdev), GFP_KERNEL);if <

内核中每个字符设备都对应一个 cdev 结构的变量，下面是它的定义： linux-2.6.22/include/linux/cdev.h struct cdev {   13        struct kobject kobj;   14        struct module *owner;   15        const struct file_operations *ops

​上回说到字符设备驱动程序的注册与销毁register_chrdev()和unregister_chrdev()这是有缺陷的。 嵌入式lnux驱动学习-2.一个驱动程序的流程 现在用另外一个更好的方法代替，我们先来看看register_chrdev()实际上是调用了 __register_chrdev(major, 0, 256, name, fops); static inline in