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4d846d260e
The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUXKPI_ASM_BARRIER_H_
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#define _LINUXKPI_ASM_BARRIER_H_
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#include <sys/types.h>
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#include <machine/atomic.h>
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#include <asm/atomic.h>
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#include <linux/compiler.h>
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/* TODO: Check other archs for atomic_thread_fence_* useability */
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#if defined(__amd64__) || defined(__i386__)
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#define smp_mb() atomic_thread_fence_seq_cst()
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#define smp_wmb() atomic_thread_fence_rel()
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#define smp_rmb() atomic_thread_fence_acq()
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#define smp_store_mb(x, v) do { (void)xchg(&(x), v); } while (0)
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#endif
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#ifndef smp_mb
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#define smp_mb() mb()
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#endif
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#ifndef smp_wmb
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#define smp_wmb() wmb()
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#endif
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#ifndef smp_rmb
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#define smp_rmb() rmb()
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#endif
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#ifndef smp_store_mb
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#define smp_store_mb(x, v) do { WRITE_ONCE(x, v); smp_mb(); } while (0)
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#endif
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#define smp_mb__before_atomic() barrier()
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#define smp_mb__after_atomic() barrier()
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#endif /* _LINUXKPI_ASM_BARRIER_H_ */
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