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kernel/linux-rt-4.4.41/arch/frv/include/asm/barrier.h 720 Bytes
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  /* FR-V CPU memory barrier definitions
   *
   * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
   * Written by David Howells (dhowells@redhat.com)
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */
  
  #ifndef _ASM_BARRIER_H
  #define _ASM_BARRIER_H
  
  #define nop()			asm volatile ("nop"::)
  
  #define mb()			asm volatile ("membar" : : :"memory")
  #define rmb()			asm volatile ("membar" : : :"memory")
  #define wmb()			asm volatile ("membar" : : :"memory")
  
  #include <asm-generic/barrier.h>
  
  #endif /* _ASM_BARRIER_H */