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 */
23
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