1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (C) 2020 ARM Ltd.
 4 */
 5#ifndef __ASM_VDSO_PROCESSOR_H
 6#define __ASM_VDSO_PROCESSOR_H
 7
 8#ifndef __ASSEMBLY__
 9
10#if __LINUX_ARM_ARCH__ == 6 || defined(CONFIG_ARM_ERRATA_754327)
11#define cpu_relax()						\
12	do {							\
13		smp_mb();					\
14		__asm__ __volatile__("nop; nop; nop; nop; nop; nop; nop; nop; nop; nop;");	\
15	} while (0)
16#else
17#define cpu_relax()			barrier()
18#endif
19
20#endif /* __ASSEMBLY__ */
21
22#endif /* __ASM_VDSO_PROCESSOR_H */