[XFS] remove the sema_t from XFS.

/*

 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.

 * 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 as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it would 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 the Free Software Foundation,

 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#ifndef __XFS_SUPPORT_SEMA_H__

#define __XFS_SUPPORT_SEMA_H__

#include <linux/time.h>

#include <linux/wait.h>

#include <linux/semaphore.h>

#include <asm/atomic.h>

/*

 * sema_t structure just maps to struct semaphore in Linux kernel.

 */

typedef struct semaphore sema_t;

#define initnsema(sp, val, name)	sema_init(sp, val)

#define psema(sp, b)			down(sp)

#define vsema(sp)			up(sp)

#define freesema(sema)			do { } while (0)

static inline int issemalocked(sema_t *sp)

{

	return down_trylock(sp) || (up(sp), 0);

}

/*

 * Map cpsema (try to get the sema) to down_trylock. We need to switch

 * the return values since cpsema returns 1 (acquired) 0 (failed) and

 * down_trylock returns the reverse 0 (acquired) 1 (failed).

 */

static inline int cpsema(sema_t *sp)

{

	return down_trylock(sp) ? 0 : 1;

}

#endif /* __XFS_SUPPORT_SEMA_H__ */

#include <mrlock.h>

#include <sv.h>

#include <mutex.h>

#include <sema.h>

#include <time.h>

#include <support/ktrace.h>

#include <support/debug.h>

#include <support/uuid.h>

#include <linux/semaphore.h>

#include <linux/mm.h>

#include <linux/kernel.h>

#include <linux/blkdev.h>