cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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barrier.h (892B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * Copied from the kernel sources to tools/perf/:
      4 *
      5 * Generic barrier definitions.
      6 *
      7 * It should be possible to use these on really simple architectures,
      8 * but it serves more as a starting point for new ports.
      9 *
     10 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
     11 * Written by David Howells (dhowells@redhat.com)
     12 */
     13#ifndef __TOOLS_LINUX_ASM_GENERIC_BARRIER_H
     14#define __TOOLS_LINUX_ASM_GENERIC_BARRIER_H
     15
     16#ifndef __ASSEMBLY__
     17
     18#include <linux/compiler.h>
     19
     20/*
     21 * Force strict CPU ordering. And yes, this is required on UP too when we're
     22 * talking to devices.
     23 *
     24 * Fall back to compiler barriers if nothing better is provided.
     25 */
     26
     27#ifndef mb
     28#define mb()	barrier()
     29#endif
     30
     31#ifndef rmb
     32#define rmb()	mb()
     33#endif
     34
     35#ifndef wmb
     36#define wmb()	mb()
     37#endif
     38
     39#endif /* !__ASSEMBLY__ */
     40#endif /* __TOOLS_LINUX_ASM_GENERIC_BARRIER_H */