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1// SPDX-License-Identifier: GPL-2.02// Copyright (C) 2014 Seth Jennings <sjenning@redhat.com>3 4#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt5 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