1/*
2 * This module emits "Hello, world" on printk when loaded.
3 *
4 * It is designed to be used for basic evaluation of the module loading
5 * subsystem (for example when validating module signing/verification). It
6 * lacks any extra dependencies, and will not normally be loaded by the
7 * system unless explicitly requested by name.
8 */
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/init.h>
13#include <linux/module.h>
14#include <linux/printk.h>
15
16static int __init test_module_init(void)
17{
18 pr_warn("Hello, world\n");
19
20 return 0;
21}
22
23module_init(test_module_init);
24
25static void __exit test_module_exit(void)
26{
27 pr_warn("Goodbye\n");
28}
29
30module_exit(test_module_exit);
31
32MODULE_AUTHOR("Kees Cook <keescook@chromium.org>");
33MODULE_LICENSE("GPL");
34