Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
37 lines
934 B
C
37 lines
934 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 __ONCE_LITE_IF(condition) \
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({ \
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static bool __section(".data..once") __already_done; \
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bool __ret_cond = !!(condition); \
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bool __ret_once = false; \
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\
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if (unlikely(__ret_cond) && unlikely(!__already_done)) {\
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__already_done = true; \
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__ret_once = true; \
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} \
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unlikely(__ret_once); \
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})
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#define DO_ONCE_LITE_IF(condition, func, ...) \
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({ \
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bool __ret_do_once = !!(condition); \
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\
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if (__ONCE_LITE_IF(__ret_do_once)) \
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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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