简单驱动编译问题,请高手帮忙看看,急~

literature

我在编译一个驱动的时候出现一些问题,驱动是我参照书和网上的资料写的一个很基本的驱动,但是编译一直没法通过,恳请高手帮忙看看啊~~
驱动代码如下:
#ifndef __KERNEL__
#define __KERNEL__
#endif

#ifndef __NO_VERSION_
#define __NO_VERSION_
#endif

#ifndef MODULE
#define MODULE
#endif

#ifndef __KERNEL_SYSCALLS__
#define __KERNEL_SYSCALLS__
#endif

#include <linux/kernel.h>      
#include <linux/module.h>
#include <linux/config.h>
#include <linux/string.h>
#include <asm/uaccess.h>
#include <asm/segment.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <unistd.h>

#if defined(CONFIG_SMP)
#define __SMP__
#endif

#if defined(CONFIG_MODVERSIONS)
#define MODVERSIONS
#include <linux/modversions.h>
#endif

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("A SIMPLE CHAR DRIVER");
MODULE_AUTHOR("PLIKE<[email protected]>");

int init_module(void);

void cleanup_module(void);

static int device_open(struct inode *, struct file *);

static int device_release(struct inode *, struct file *);

static ssize_t device_read(struct file *, char *, size_t, loff_t *);

static ssize_t device_write(struct file *, const char *, size_t, loff_t *);

#define SUCCESS 0

#define DEVICE_NAME "chardev" /* Dev name as it appears in /proc/devices */

#define BUF_LEN 80 /* Max length of the message from the device */

/*

* Global variables are declared as static, so are global within the file.

*/

static int Major; /* Major number assigned to our device driver */

static int Device_Open = 0; /* Is device open?*/

char kbuf[10];

static int device_open(struct inode *inode, struct file *file)

{

if (Device_Open)

return -EBUSY;

Device_Open++;
printf("device is opened~");

try_module_get(THIS_MODULE);

return SUCCESS;

}


static int device_release(struct inode *inode, struct file *file)

{

Device_Open--; /* We're now ready for our next caller */

module_put(THIS_MODULE);

return 0;

}
static ssize_t device_read(struct file *filp,char *buffer,size_t length,loff_t
* offset)
//static int device_read(struct inode *inode,struct file *file, char *buf,int
//count)

{

if (verify_area(VERIFY_WRITE,buffer,length) == -EFAULT )

return -EFAULT;


//copy_to_user(buffer, kbuf, length);
//_constant_copy_to_user(1,1,1);
_copy_to_user(1, 1, 1);
printf("111111111111");
return length;

}

static ssize_t device_write(struct file *filp, const char *buff, size_t len,
loff_t * off)
{

int retval = len;

//extern unsigned char kbuf[10];

_constant_copy_from_user(1, 1, 1);

return retval;

}

struct file_operations fops = {
read: device_read,
write: device_write,
open: device_open,
release: device_release
};


int init_module(void)

{

Major = register_chrdev(0, DEVICE_NAME, &fops);

if (Major < 0) {

printf("Registering the character device failed with %d\n",Major);

return Major;

}

printf("<1>I was assigned major number %d. To talk to\n", Major);

printf("<1>the driver, create a dev file with\n");

printf("'mknod /dev/hello c %d 0'.\n", Major);

printf("<1>Try various minor numbers. Try to cat and echo to\n");

printf("the device file.\n");

printf("<1>Remove the device file and module when done.\n");

return 0;

}

void cleanup_module(void)

{

int ret;
ret=unregister_chrdev(Major, DEVICE_NAME);

//if (ret < 0)

//printf("Error in unregister_chrdev: %d\n", ret);

}

//module_init(init_module);
//module_exit(cleanup_module);

我使用的是 redhat linux 2.4.20-8 #1 Thu Mar 13 17:54:28 EST 2003 i686 i686 i386 GNU/Linux
编译参数设置如下:
gcc -c copydriver.c -D_KERNEL_ -DMODULE -O2 -I /usr/src/linux-2.4/include/ -o copydriver.o
编译后报错信息如下:
copydriver.c: In function `cleanup_module':
copydriver.c:176: `c192d491' undeclared (first use in this function)
copydriver.c:176: (Each undeclared identifier is reported only once
copydriver.c:176: for each function it appears in.)
copydriver.c:176: called object is not a function
有没有高手曾经遇到过这个问题啊,请指教,万分感激~~