78c8516141
Enable arm to use only the common headers in the implementation of the vDSO library. Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Russell King <linux@armlinux.org.uk> Link: https://lkml.kernel.org/r/20200320145351.32292-25-vincenzo.frascino@arm.com
23 lines
492 B
C
23 lines
492 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2020 ARM Ltd.
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*/
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#ifndef __ASM_VDSO_PROCESSOR_H
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#define __ASM_VDSO_PROCESSOR_H
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#ifndef __ASSEMBLY__
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#if __LINUX_ARM_ARCH__ == 6 || defined(CONFIG_ARM_ERRATA_754327)
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#define cpu_relax() \
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do { \
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smp_mb(); \
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__asm__ __volatile__("nop; nop; nop; nop; nop; nop; nop; nop; nop; nop;"); \
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} while (0)
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#else
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#define cpu_relax() barrier()
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_VDSO_PROCESSOR_H */
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