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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_ONCE_LITE_H
#define _LINUX_ONCE_LITE_H
#include <linux/types.h>
/* Call a function once. Similar to DO_ONCE(), but does not use jump label
* patching via static keys.
*/
#define DO_ONCE_LITE(func, ...) \
DO_ONCE_LITE_IF(true, func, ##__VA_ARGS__)
#define __ONCE_LITE_IF(condition) \
({ \
static bool __section(".data.once") __already_done; \
bool __ret_cond = !!(condition); \
bool __ret_once = false; \
\
if (unlikely(__ret_cond && !__already_done)) { \
__already_done = true; \
__ret_once = true; \
} \
unlikely(__ret_once); \
})
#define DO_ONCE_LITE_IF(condition, func, ...) \
({ \
bool __ret_do_once = !!(condition); \
\
if (__ONCE_LITE_IF(__ret_do_once)) \
func(__VA_ARGS__); \
\
unlikely(__ret_do_once); \
})
#endif /* _LINUX_ONCE_LITE_H */