1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef __LINUX_KMOD_H__
3#define __LINUX_KMOD_H__
4
5/*
6 * include/linux/kmod.h
7 */
8
9#include <linux/umh.h>
10#include <linux/gfp.h>
11#include <linux/stddef.h>
12#include <linux/errno.h>
13#include <linux/compiler.h>
14#include <linux/workqueue.h>
15#include <linux/sysctl.h>
16
17#define KMOD_PATH_LEN 256
18
19#ifdef CONFIG_MODULES
20extern char modprobe_path[]; /* for sysctl */
21/* modprobe exit status on success, -ve on error. Return value
22 * usually useless though. */
23extern __printf(2, 3)
24int __request_module(bool wait, const char *name, ...);
25#define request_module(mod...) __request_module(true, mod)
26#define request_module_nowait(mod...) __request_module(false, mod)
27#define try_then_request_module(x, mod...) \
28 ((x) ?: (__request_module(true, mod), (x)))
29#else
30static inline int request_module(const char *name, ...) { return -ENOSYS; }
31static inline int request_module_nowait(const char *name, ...) { return -ENOSYS; }
32#define try_then_request_module(x, mod...) (x)
33#endif
34
35#endif /* __LINUX_KMOD_H__ */
36

source code of linux/include/linux/kmod.h