各位大哥，编译出问题，求救！

各位大哥，一下是我的驱动程序，从书上抄的
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/init.h>

#if CONFIG_MODVERSIONS==1
#define MODVERSIONS
#include <linux/modversions.h>
#endif

#include <linux/fs.h>
#include <linux/wrapper.h>

#ifndef KERNEL_VERSION
#define KERNEL_VERSION(a,b,c) ((a)*65536+(b)*256+(c))
#endif

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,0)
#include <asm/uaccess.h>
#endif

#define SUCCESS 0
#define DEVICE_NAME "char_dev"
#define BUF_LEN 100
static int Device_Open = 0;
static char Message[BUF_LEN];
static char *Message_Ptr;
static int Major;

static ssize_t device_read(struct file *file,char *buffer,size_t length,loff_t * offset)
{
  int bytes_read = 0;
  if(*Message_Ptr == 0)
      return 0;

  while(length&&*Message_Ptr){
    copy_to_user(buffer++,*(Message_Ptr++),length--);
    bytes_read++;
  }

#ifdef DEBUG
  printk("read %d bytes,%d left\n",bytes_read,length);
#endif
  
  return bytes_read;
}


static ssize_t device_write(struct file *file,char *buffer,size_t length,loff_t * offset)
{
  int i;

#ifdef DEBUG
  printk("device_write(%p,%s,%d)",file,buffer,length);
#endif

  copy_from_user(Message,buffer,length);

  Message_Ptr = Message;

  return i;
}

static int device_open(struct inode * inode,struct file * file)
{
  static int counter = 0;

#ifdef DEBUG
  printk("device_open(%p,%p)\n",inode,file);
#endif

  printk("Device:%d.%d\n",inode->i_rdev >> 8,inode->i_rdev & 0xFF);

  if(Device_Open)
    return -EBUSY;

  Device_Open++;

  sprintf(Message,"If I tole you once,I told you %d times - %s",counter++,
    "hello world\n");
    
    Message_Ptr = Message;

    MOD_INC_USE_COUNT;

    return SUCCESS;

}


static int device_release(struct inode * inode,struct file *flie)
{
#ifdef DEBUG
printk("device_release(%p,%p)\n",inode,file);
#endif

Device_Open--;

MOD_DEC_USE_COUNT;

return 0;
}

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

int init_module(void)
{
Major = module_register_chrdev(0,DEVICE_NAME,&Fops);
if(Major<0)
{
printk("%s device failed with %d\n","Sorry,registering the character",
Major);
return Major;
}


printk("%s the major device number is %d.\n","Registeration is a
               success.",Major);
return 0;
}

void cleanup_module(void)
{
         int ret;
ret = module_unregister_chrdev(Major,DEVICE_NAME);
if(ret<0)
 printk("error in unregister_chrdev :%d\n",ret);
printk("exiting...\n");
}
存放在此目录下/home/atlantis/zqh/mydrv/，然后用如下命令编译
gcc -c mydrv.c -D_KERNEL_ -DMODULE -DLINUX -I/usr/src/linux-2.4.20-8/include
可是却出现了这么多错误，忘各位大哥指点一下
In file included from /usr/src/linux-2.4.20-8/include/linux/sched.h:16,
                 from mydrv.c:3:
/usr/src/linux-2.4.20-8/include/linux/timex.h:173: field `time' has incomplete type
In file included from /usr/src/linux-2.4.20-8/include/linux/sched.h:23,
                 from mydrv.c:3:
/usr/src/linux-2.4.20-8/include/asm/mmu.h:12: field `sem' has incomplete type
In file included from /usr/src/linux-2.4.20-8/include/linux/sched.h:31,
                 from mydrv.c:3:
/usr/src/linux-2.4.20-8/include/linux/pid.h:18: field `task_list' has incomplete type
/usr/src/linux-2.4.20-8/include/linux/pid.h:19: field `hash_chain' has incomplete type
/usr/src/linux-2.4.20-8/include/linux/pid.h:24: field `pid_chain' has incomplete type
/usr/src/linux-2.4.20-8/include/linux/pid.h:36: parse error before '(' token
/usr/src/linux-2.4.20-8/include/linux/pid.h:38: parse error before '(' token
/usr/src/linux-2.4.20-8/include/linux/pid.h:43: parse error before '(' token
/usr/src/linux-2.4.20-8/include/linux/pid.h:49: parse error before '(' token
/usr/src/linux-2.4.20-8/include/linux/pid.h:52: parse error before '(' token
In file included from mydrv.c:31:
/usr/src/linux-2.4.20-8/include/asm/uaccess.h: In function `verify_area':
/usr/src/linux-2.4.20-8/include/asm/uaccess.h:64: `current' undeclared (first use in this function)
/usr/src/linux-2.4.20-8/include/asm/uaccess.h:64: (Each undeclared identifier is reported only once
/usr/src/linux-2.4.20-8/include/asm/uaccess.h:64: for each function it appears in.)
/usr/src/linux-2.4.20-8/include/asm/uaccess.h: In function `__constant_copy_to_user':
/usr/src/linux-2.4.20-8/include/asm/uaccess.h:550: `current' undeclared (first use in this function)
/usr/src/linux-2.4.20-8/include/asm/uaccess.h: In function `__constant_copy_from_user':
/usr/src/linux-2.4.20-8/include/asm/uaccess.h:558: `current' undeclared (first use in this function)
mydrv.c: At top level:
mydrv.c:42: warning: `struct file' declared inside parameter list
mydrv.c:42: warning: its scope is only this definition or declaration, which is probably not what you want
mydrv.c: In function `device_read':
mydrv.c:49: warning: passing arg 2 of `__constant_copy_to_user' makes pointer from integer without a cast
mydrv.c:49: warning: passing arg 2 of `__generic_copy_to_user_Rd523fdd3' makes pointer from integer without a cast
mydrv.c: At top level:
mydrv.c:61: warning: `struct file' declared inside parameter list
mydrv.c:76: warning: `struct file' declared inside parameter list
mydrv.c:76: warning: `struct inode' declared inside parameter list
mydrv.c: In function `device_open':
mydrv.c:84: dereferencing pointer to incomplete type
mydrv.c:84: dereferencing pointer to incomplete type
mydrv.c: At top level:
mydrv.c:103: warning: `struct file' declared inside parameter list
mydrv.c:103: warning: `struct inode' declared inside parameter list
mydrv.c:116: variable `Fops' has initializer but incomplete type
mydrv.c:117: unknown field `read' specified in initializer
mydrv.c:117: warning: excess elements in struct initializer
mydrv.c:117: warning: (near initialization for `Fops')
mydrv.c:118: unknown field `write' specified in initializer
mydrv.c:118: warning: excess elements in struct initializer
mydrv.c:118: warning: (near initialization for `Fops')
mydrv.c:119: unknown field `open' specified in initializer
mydrv.c:119: warning: excess elements in struct initializer
mydrv.c:119: warning: (near initialization for `Fops')
mydrv.c:120: unknown field `release' specified in initializer
mydrv.c:120: warning: excess elements in struct initializer
mydrv.c:120: warning: (near initialization for `Fops')
mydrv.c:134:54: warning: multi-line string literals are deprecated
mydrv.c:116: storage size of `Fops' isn't known

Compilation exited abnormally with code 1 at Fri Sep  3 16:54:10