| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Copyright (C) 2020 ARM Ltd. |
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| 4 | */ |
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| 5 | #ifndef __ASM_VDSO_PROCESSOR_H |
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| 6 | #define __ASM_VDSO_PROCESSOR_H |
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| 7 | |
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| 8 | #ifndef __ASSEMBLY__ |
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| 9 | |
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| 10 | /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ |
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| 11 | static __always_inline void rep_nop(void) |
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| 12 | { |
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| 13 | asm volatile("rep; nop" ::: "memory" ); |
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| 14 | } |
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| 15 | |
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| 16 | static __always_inline void cpu_relax(void) |
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| 17 | { |
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| 18 | rep_nop(); |
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| 19 | } |
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| 20 | |
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| 21 | struct getcpu_cache; |
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| 22 | |
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| 23 | notrace long __vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused); |
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| 24 | |
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| 25 | #endif /* __ASSEMBLY__ */ |
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| 26 | |
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| 27 | #endif /* __ASM_VDSO_PROCESSOR_H */ |
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| 28 | |
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