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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_H14#define __TOOLS_LINUX_ASM_GENERIC_BARRIER_H15 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're22 * talking to devices.23 *24 * Fall back to compiler barriers if nothing better is provided.25 */26 27#ifndef mb28#define mb() barrier()29#endif30 31#ifndef rmb32#define rmb() mb()33#endif34 35#ifndef wmb36#define wmb() mb()37#endif38 39#endif /* !__ASSEMBLY__ */40#endif /* __TOOLS_LINUX_ASM_GENERIC_BARRIER_H */41