1// SPDX-License-Identifier: GPL-2.0
2// Copyright (C) 2014 Seth Jennings <sjenning@redhat.com>
3
4#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
5
6#include <linux/module.h>
7#include <linux/kernel.h>
8#include <linux/livepatch.h>
9
10#include <linux/seq_file.h>
11static int livepatch_cmdline_proc_show(struct seq_file *m, void *v)
12{
13	seq_printf(m, "%s: %s\n", THIS_MODULE->name,
14		   "this has been live patched");
15	return 0;
16}
17
18static struct klp_func funcs[] = {
19	{
20		.old_name = "cmdline_proc_show",
21		.new_func = livepatch_cmdline_proc_show,
22	}, { }
23};
24
25static struct klp_object objs[] = {
26	{
27		/* name being NULL means vmlinux */
28		.funcs = funcs,
29	}, { }
30};
31
32static struct klp_patch patch = {
33	.mod = THIS_MODULE,
34	.objs = objs,
35};
36
37static int test_klp_livepatch_init(void)
38{
39	return klp_enable_patch(&patch);
40}
41
42static void test_klp_livepatch_exit(void)
43{
44}
45
46module_init(test_klp_livepatch_init);
47module_exit(test_klp_livepatch_exit);
48MODULE_LICENSE("GPL");
49MODULE_INFO(livepatch, "Y");
50MODULE_AUTHOR("Seth Jennings <sjenning@redhat.com>");
51MODULE_DESCRIPTION("Livepatch test: livepatch module");
52