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