1/* 2 * Memory barrier definitions for the Hexagon architecture 3 * 4 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 and 8 * only version 2 as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 18 * 02110-1301, USA. 19 */ 20 21#ifndef _ASM_BARRIER_H 22#define _ASM_BARRIER_H 23 24#define rmb() barrier() 25#define read_barrier_depends() barrier() 26#define wmb() barrier() 27#define mb() barrier() 28#define smp_rmb() barrier() 29#define smp_read_barrier_depends() barrier() 30#define smp_wmb() barrier() 31#define smp_mb() barrier() 32#define smp_mb__before_atomic_dec() barrier() 33#define smp_mb__after_atomic_dec() barrier() 34#define smp_mb__before_atomic_inc() barrier() 35#define smp_mb__after_atomic_inc() barrier() 36 37/* Set a value and use a memory barrier. Used by the scheduler somewhere. */ 38#define set_mb(var, value) \ 39 do { var = value; mb(); } while (0) 40 41#endif /* _ASM_BARRIER_H */ 42