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 /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
11 static __always_inline void rep_nop(void)
12 {
13 asm volatile("rep; nop" ::: "memory");
14 }
15
16 static __always_inline void cpu_relax(void)
17 {
18 rep_nop();
19 }
20
21 struct getcpu_cache;
22
23 notrace long __vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused);
24
25 #endif /* __ASSEMBLY__ */
26
27 #endif /* __ASM_VDSO_PROCESSOR_H */
28
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