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>
25 lines
570 B
C
25 lines
570 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_MCS_LOCK_H
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#define __ASM_MCS_LOCK_H
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#ifdef CONFIG_SMP
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#include <asm/spinlock.h>
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/* MCS spin-locking. */
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#define arch_mcs_spin_lock_contended(lock) \
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do { \
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/* Ensure prior stores are observed before we enter wfe. */ \
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smp_mb(); \
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while (!(smp_load_acquire(lock))) \
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wfe(); \
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} while (0) \
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#define arch_mcs_spin_unlock_contended(lock) \
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do { \
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smp_store_release(lock, 1); \
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dsb_sev(); \
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} while (0)
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#endif /* CONFIG_SMP */
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#endif /* __ASM_MCS_LOCK_H */
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