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Encumbrance review done.
Add copyright and license words consistent with GPL.
Refer to http://fsg.melbourne.sgi.com/reviews/ for details.

There is a slight change in the license terms and conditions words
to go with the copyrights, so most of the files are not getting
new GPL's, just updated versions ... but there are 20-30 more files
here as well.

/*
 * Copyright (C) 1999 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; either version 2 of the License, or (at
 * your option) any later version.
 * 
 * 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 the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 */
#ident "$Revision: 1.15 $"

#include <sys/param.h>
#ifdef SIM
#define _KERNEL	1
#endif
#include "xfs_buf.h"
#ifdef SIM
#undef _KERNEL
#endif
#include <sys/vnode.h>
#include <sys/debug.h>
#ifndef SIM
#include <sys/kmem.h>
#include <sys/systm.h>
#include <sys/cmn_err.h>
#endif
#include "xfs_macros.h"
#include "xfs_types.h"
#include "xfs_inum.h"
#include "xfs_log.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_mount.h"

#ifdef SIM
#include "sim.h"
#endif


/*
 * This is called to determine if there are any pending
 * async transactions for the given file system.
 * Just return a value based on the value
 * of the list pointer in the xfs_mount structure.
 */
int
xfs_trans_any_async(struct xfs_mount *mp)
{
	return (mp->m_async_trans != NULL);
}


/*
 * Add the given transaction to the list of asynchronous
 * transactions to be committed.
 */
void
xfs_trans_add_async(xfs_trans_t *tp)
{
	int			s;
	struct xfs_mount	*mp;

	mp = tp->t_mountp;
	s = mutex_spinlock(&mp->m_async_lock);
	tp->t_forw = mp->m_async_trans;
	mp->m_async_trans = tp;
	mutex_spinunlock(&mp->m_async_lock, s);
}

/*
 * Return the list of asynchronous transactions hung off
 * of the given mount structure. If there is nothing on
 * the list, return NULL.
 */
xfs_trans_t *
xfs_trans_get_async(struct xfs_mount *mp)
{
	int			s;
	xfs_trans_t		*async_list;

	/*
	 * If the list is NULL, return without bothering
	 * with the lock.
	 */
	if (mp->m_async_trans == NULL) {
		return (NULL);
	}

	/*
	 * Pull off the entire list and return it.
	 * If it's NULL, we return NULL which is fine.
	 */
	s = mutex_spinlock(&mp->m_async_lock);
	async_list = mp->m_async_trans;
	mp->m_async_trans = NULL;
	mutex_spinunlock(&mp->m_async_lock, s);

	return (async_list);
}