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Filename/usr/src/linux-headers-3.13.0-24/arch/xtensa/include/asm/barrier.h
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Create time27-Apr-2025 09:50
Last modified20-Jan-2014 10:40
Last accessed06-Jul-2025 20:04
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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2001 - 2012 Tensilica Inc.
*/

#ifndef _XTENSA_SYSTEM_H
#define _XTENSA_SYSTEM_H

#define smp_read_barrier_depends() do { } while(0)
#define read_barrier_depends() do { } while(0)

#define mb() ({ __asm__ __volatile__("memw" : : : "memory"); })
#define rmb() barrier()
#define wmb() mb()

#ifdef CONFIG_SMP
#error smp_* not defined
#else
#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
#endif

#define set_mb(var, value) do { var = value; mb(); } while (0)

#endif /* _XTENSA_SYSTEM_H */