我的驱动程序模块,不能加载!!!
我才学驱动程序,按自己的理解写了个open和release函数,但是加载模块时,出现错误提示,大家帮我看看我这个模块有错吗?

#define   MODULE
#define   __KERNEL__
#include <linux/module.h>
#include <linux/fs.h>

int   xy_open(struct   inode   *inode,struct   file   *   filp)
{
  printk( "open\n ");
  return   1;
}

int   xy_release(struct   inode   *inode,struct   file   *filp)
{
  printk( "close\n ");
  return   1;
}

static   struct   file_operations   xy_fop=
{
    open: xy_open,
    release: xy_release,
};

int   init_module(void)
{
    int   result;
    MODULE_LICENSE( "GPL ");  
    printk( "hello,world\n ");
    result=register_chrdev(127, "xiayu ",&xy_fop);
    if(result <0)
    {
        printk( "register_chrdev   failure\n ");
        return   0;
    }
    else
        printk( "register_chrdev   success\n ");
return   1;}

void   cleanup_module(void)
{
  int   result;
  printk( " <1> Goodbye   cruel   world\n ");
  result=unregister_chrdev(127, "xiayu ");
  if(result <0)
  {
      printk( "unregister_chrdev   failure\n ");
  }
  else
      printk( "unregister_chrdev   success\n ");
}

gcc   -I   /usr/src/linux-2.4.20-8/include   -c   hello.c     //编译

insmod   hello.o       //加载之后出现下面的信息

hello.o:   init_module:   Device   or   resource   busy
Hint:   insmod   errors   can   be   caused   by   incorrect   module   parameters,   including   invalid   IO   or   IRQ   parameters.
            You   may   find   more   information   in   syslog   or   the   output   from   dmesg



------解决方案--------------------
必须以root用户加载模块.
------解决方案--------------------
gcc -I /usr/src/linux-2.4.20-8/include -c hello.c //编译

-----------------------------------------------

模块编译的选项错误

gcc -c -D__KERNEL__ -DMODULE -o hello.o hello.c


------解决方案--------------------
c语言 一要 好好看看

return 0 是正常