/*
   * This module emits "Hello, world" on printk when loaded.
   *
   * It is designed to be used for basic evaluation of the module loading
   * subsystem (for example when validating module signing/verification). It
   * lacks any extra dependencies, and will not normally be loaded by the
   * system unless explicitly requested by name.
   */
  
  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  
  #include <linux/init.h>
  #include <linux/module.h>
  #include <linux/printk.h>
  
  static int __init test_module_init(void)
  {
  	pr_warn("Hello, world
  ");
  
  	return 0;
  }
  
  module_init(test_module_init);
  
  static void __exit test_module_exit(void)
  {
  	pr_warn("Goodbye
  ");
  }
  
  module_exit(test_module_exit);
  
  MODULE_AUTHOR("Kees Cook <keescook@chromium.org>");
  MODULE_LICENSE("GPL");