required header files not #included in cdev.h

["Daniel Rodrick" <daniel.rodrick@gmail.com>]

Hi,

This referes to the file include/linux/cdev.h whose contents are listed below:

#ifndef _LINUX_CDEV_H
#define _LINUX_CDEV_H
#ifdef __KERNEL__

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

void cdev_init(struct cdev *, const struct file_operations *);

struct cdev *cdev_alloc(void);

void cdev_put(struct cdev *p);

int cdev_add(struct cdev *, dev_t, unsigned);

void cdev_del(struct cdev *);

void cd_forget(struct inode *);

#endif
#endif

It is a little strange to me that it uses certain kernel structure
types like kobject, module, list_head etc without #including
appropriate headers. The result is that when I try to use struct cdev
in my module by simply #including cdev.h, it flags an error. As a
result I need to manually figure out which all headers do I need to
(additionally) #include and in what order.

Is this OK?

Dan

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