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24 lines
677 B
24 lines
677 B
/* 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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