40 lines
892 B
C
40 lines
892 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copied from the kernel sources to tools/perf/:
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*
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* Generic barrier definitions.
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*
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* It should be possible to use these on really simple architectures,
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* but it serves more as a starting point for new ports.
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#ifndef __TOOLS_LINUX_ASM_GENERIC_BARRIER_H
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#define __TOOLS_LINUX_ASM_GENERIC_BARRIER_H
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#ifndef __ASSEMBLY__
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#include <linux/compiler.h>
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/*
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* Force strict CPU ordering. And yes, this is required on UP too when we're
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* talking to devices.
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*
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* Fall back to compiler barriers if nothing better is provided.
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*/
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#ifndef mb
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#define mb() barrier()
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#endif
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#ifndef rmb
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#define rmb() mb()
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#endif
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#ifndef wmb
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#define wmb() mb()
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#endif
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#endif /* !__ASSEMBLY__ */
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#endif /* __TOOLS_LINUX_ASM_GENERIC_BARRIER_H */
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