barrier.h

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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 - 2005 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()  barrier()
#define rmb() mb()
#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 */