Hexagon: Delete stale barrier.h

/*

 * Memory barrier definitions for the Hexagon architecture

 *

 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

 * 02110-1301, USA.

 */

#ifndef _ASM_BARRIER_H

#define _ASM_BARRIER_H

#define rmb()				barrier()

#define read_barrier_depends()		barrier()

#define wmb()				barrier()

#define mb()				barrier()

#define smp_rmb()			barrier()

#define smp_read_barrier_depends()	barrier()

#define smp_wmb()			barrier()

#define smp_mb()			barrier()

/*  Set a value and use a memory barrier.  Used by the scheduler somewhere.  */

#define set_mb(var, value) \

	do { var = value; mb(); } while (0)

#endif /* _ASM_BARRIER_H */