LXR linux/arch/x86/include/asm/vdso/processor.h

   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. */
  11static __always_inline void rep_nop(void)
  12{
  13        asm volatile("rep; nop" ::: "memory");
  14}
  15
  16static __always_inline void cpu_relax(void)
  17{
  18        rep_nop();
  19}
  20
  21#endif /* __ASSEMBLY__ */
  22
  23#endif /* __ASM_VDSO_PROCESSOR_H */
  24