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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_ONCE_LITE_H
3#define _LINUX_ONCE_LITE_H
4
5#include <linux/types.h>
6
7/* Call a function once. Similar to DO_ONCE(), but does not use jump label
8 * patching via static keys.
9 */
10#define DO_ONCE_LITE(func, ...) \
11 DO_ONCE_LITE_IF(true, func, ##__VA_ARGS__)
12#define DO_ONCE_LITE_IF(condition, func, ...) \
13 ({ \
14 static bool __section(".data.once") __already_done; \
15 bool __ret_do_once = !!(condition); \
16 \
17 if (unlikely(__ret_do_once && !__already_done)) { \
18 __already_done = true; \
19 func(__VA_ARGS__); \
20 } \
21 unlikely(__ret_do_once); \
22 })
23
24#endif /* _LINUX_ONCE_LITE_H */