加载模块时出现下面的错误信息:

Warning: loading hello.o will taint the kernel: no license
  See http://www.tux.org/lkml/#export-tainted for information about tainted modules
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

该模块代码是:
#define   MODULE
#define __KERNEL__
                                                                           
#include "linux/kernel.h"
#include "linux/module.h"
                                                                  
#ifdef MODVERSIONS                                                                           
#include "linux/modversions.h"                                                                           
#endif                                                                           
                                                                          
int init_module()                                                                           
{                                                                           
  printk(" hello !n");                                                                           
  return 1;
}
                                                                           
                                                                           
int cleanup_module()                                                                          
{                                     
  printk(" I will shut down myself in kernerl mod n");                                                                          
  return 0;
}

加在int init_module一句之前

把　int init_module()                                                                           
{                                                                           
  printk(" hello !n");                                                                           
  return 1;
}
中的return 1 改为return 0　就可以了