1 #ifndef _LINUX_CDEV_H 2 #define _LINUX_CDEV_H 3 #ifdef __KERNEL__ 4 5 #include <linux/kobject.h> 6 #include <linux/kdev_t.h> 7 #include <linux/list.h> 8 9 struct file_operations; 10 struct inode; 11 struct module; 12 13 struct cdev { 14 struct kobject kobj; 15 struct module *owner; 16 const struct file_operations *ops; 17 struct list_head list; 18 dev_t dev; 19 unsigned int count; 20 }; 21 22 void cdev_init(struct cdev *, const struct file_operations *); 23 24 struct cdev *cdev_alloc(void); 25 26 void cdev_put(struct cdev *p); 27 28 int cdev_add(struct cdev *, dev_t, unsigned); 29 30 void cdev_del(struct cdev *); 31 32 void cd_forget(struct inode *); 33 34 extern struct backing_dev_info directly_mappable_cdev_bdi; 35 36 #endif 37 #endif 38