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v0.8.1
https://github.com/torvalds/linux
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Tip revision: 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f authored by Linus Torvalds on 12 September 2021, 23:28:37 UTC
Linux 5.15-rc1
Tip revision: 6880fa6
processor.h
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2020 ARM Ltd.
 */
#ifndef __ASM_VDSO_PROCESSOR_H
#define __ASM_VDSO_PROCESSOR_H

#ifndef __ASSEMBLY__

/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
static __always_inline void rep_nop(void)
{
	asm volatile("rep; nop" ::: "memory");
}

static __always_inline void cpu_relax(void)
{
	rep_nop();
}

#endif /* __ASSEMBLY__ */

#endif /* __ASM_VDSO_PROCESSOR_H */
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