8 const struct file_operations *ops;
14 void cdev_init(struct cdev *, const struct file_operations *);
16 struct cdev *cdev_alloc(void);
18 void cdev_put(struct cdev *p);
20 int cdev_add(struct cdev *, dev_t, unsigned);
22 void cdev_del(struct cdev *);
24 void cd_forget(struct inode *);
26 extern struct backing_dev_info directly_mappable_cdev_bdi;