// SPDX-License-Identifier: GPL-2.0// Copyright (C) 2018 Joe Lawrence <joe.lawrence@redhat.com> #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h>#include <linux/kernel.h>#include <linux/livepatch.h> static int replace;module_param(replace, int, 0644);MODULE_PARM_DESC(replace, "replace (default=0)"); #include <linux/seq_file.h>static int livepatch_meminfo_proc_show(struct seq_file *m, void *v){	seq_printf(m, "%s: %s\n", THIS_MODULE->name,		   "this has been live patched");	return 0;} static struct klp_func funcs[] = {	{		.old_name = "meminfo_proc_show",		.new_func = livepatch_meminfo_proc_show,	}, {}}; static struct klp_object objs[] = {	{		/* name being NULL means vmlinux */		.funcs = funcs,	}, {}}; static struct klp_patch patch = {	.mod = THIS_MODULE,	.objs = objs,	/* set .replace in the init function below for demo purposes */}; static int test_klp_atomic_replace_init(void){	patch.replace = replace;	return klp_enable_patch(&patch);} static void test_klp_atomic_replace_exit(void){} module_init(test_klp_atomic_replace_init);module_exit(test_klp_atomic_replace_exit);MODULE_LICENSE("GPL");MODULE_INFO(livepatch, "Y");MODULE_AUTHOR("Joe Lawrence <joe.lawrence@redhat.com>");MODULE_DESCRIPTION("Livepatch test: atomic replace");