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57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*****************************************************************************
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*
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* Copyright (C) 2006-2026 Florian Pose, Ingenieurgemeinschaft IgH
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*
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* This file is part of the IgH EtherCAT master.
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*
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* The file is free software; you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation; version 2.1 of the License.
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*
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* This file is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this file. If not, see <http://www.gnu.org/licenses/>.
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*
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****************************************************************************/
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/** \file
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* Definitions of Kernel SMP macros.
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*/
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/****************************************************************************/
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#ifndef MASTER_SMP_H_
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#define MASTER_SMP_H_
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#include <linux/version.h>
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/****************************************************************************/
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/* Define SMP macros on kernel versions where they did not exist yet.
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*/
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#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 47)
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#define smp_store_release(p, v) \
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do { \
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smp_mb(); \
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ACCESS_ONCE(*p) = (v); \
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} while (0)
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#define smp_load_acquire(p) \
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({ \
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typeof(*p) ___p1 = ACCESS_ONCE(*p); \
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smp_mb(); \
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___p1; \
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})
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#endif
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/****************************************************************************/
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#endif // MASTER_SMP_H_
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