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hello.h/*
 * head file of hello.ko
 * location of following files : /usr/src/$(uname -r)/include/
 */
#include<linux/init.h> //module_init(),module_exit()
#include<linux/module.h> //MODULE_AUTHOR(),MODULE_LICENSE()
#include<linux/kernel.h> //KERN_EMERGhello.c/*
 * source file of hello.ko
 * location: /usr/src/$(uname -r)/driver/net/hello/
 */
#include "hello.h"  //find head file in current dir/*
 * hello_init : initial function, called when module is installed
 * return 0 if succeeded
 */
static int hello_init(void)
{
  printk(KERN_EMERG"hello.ko is installed! ");
  return 0;
}/*
 * hello_exit : called when module is uninstalled
 */
static void hello_exit(void)
{
  printk(KERN_EMERG"hello.ko is uninstalled! ");
}module_init(hello_init);
module_exit(hello_exit);MODULE_LICENSE("GPL");
MODULE_AUTHOR("zhangsk");Makefileobj-m := hello.oall:             make -C /lib/modules/$(shell uname -r)/build SUBDIRS=$(PWD) modulesclean:            make -C /lib/modules/$(shell uname -r)/build SUBDIRS=$(PWD) clean 然后在当前文目录中输入: insmod hello.koOK, 可以看到屏幕中输出: hello.ko is installed!