1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * This module emits "Hello, world" on printk when loaded. |
4 | * |
5 | * It is designed to be used for basic evaluation of the module loading |
6 | * subsystem (for example when validating module signing/verification). It |
7 | * lacks any extra dependencies, and will not normally be loaded by the |
8 | * system unless explicitly requested by name. |
9 | */ |
10 | |
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
12 | |
13 | #include <linux/init.h> |
14 | #include <linux/module.h> |
15 | #include <linux/printk.h> |
16 | |
17 | static int __init test_module_init(void) |
18 | { |
19 | pr_warn("Hello, world\n" ); |
20 | |
21 | return 0; |
22 | } |
23 | |
24 | module_init(test_module_init); |
25 | |
26 | static void __exit test_module_exit(void) |
27 | { |
28 | pr_warn("Goodbye\n" ); |
29 | } |
30 | |
31 | module_exit(test_module_exit); |
32 | |
33 | MODULE_AUTHOR("Kees Cook <keescook@chromium.org>" ); |
34 | MODULE_LICENSE("GPL" ); |
35 | |