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Update 2.6.x-xfs to 2.6.23-rc4.

Also update fs/xfs with external mainline changes.
There were 12 such missing commits that I detected:

--------
commit ad690ef9e690f6c31f7d310b09ef1314bcec9033
Author: Al Viro <viro@ftp.linux.org.uk>
    xfs ioctl __user annotations

commit 20c2df83d25c6a95affe6157a4c9cac4cf5ffaac
Author: Paul Mundt <lethal@linux-sh.org>
    mm: Remove slab destructors from kmem_cache_create().

commit d0217ac04ca6591841e5665f518e38064f4e65bd
Author: Nick Piggin <npiggin@suse.de>
    mm: fault feedback #1

commit 54cb8821de07f2ffcd28c380ce9b93d5784b40d7
Author: Nick Piggin <npiggin@suse.de>
    mm: merge populate and nopage into fault (fixes nonlinear)

commit d00806b183152af6d24f46f0c33f14162ca1262a
Author: Nick Piggin <npiggin@suse.de>
    mm: fix fault vs invalidate race for linear mappings

commit a569425512253992cc64ebf8b6d00a62f986db3e
Author: Christoph Hellwig <hch@infradead.org>
    knfsd: exportfs: add exportfs.h header

commit 831441862956fffa17b9801db37e6ea1650b0f69
Author: Rafael J. Wysocki <rjw@sisk.pl>
    Freezer: make kernel threads nonfreezable by default

commit 8e1f936b73150f5095448a0fee6d4f30a1f9001d
Author: Rusty Russell <rusty@rustcorp.com.au>
    mm: clean up and kernelify shrinker registration

commit 5ffc4ef45b3b0a57872f631b4e4ceb8ace0d7496
Author: Jens Axboe <jens.axboe@oracle.com>
    sendfile: remove .sendfile from filesystems that use generic_file_sendfile()

commit 8bb7844286fb8c9fce6f65d8288aeb09d03a5e0d
Author: Rafael J. Wysocki <rjw@sisk.pl>
    Add suspend-related notifications for CPU hotplug

commit 59c51591a0ac7568824f541f57de967e88adaa07
Author: Michael Opdenacker <michael@free-electrons.com>
    Fix occurrences of "the the "

commit 0ceb331433e8aad9c5f441a965d7c681f8b9046f
Author: Dmitriy Monakhov <dmonakhov@openvz.org>
    mm: move common segment checks to separate helper function
--------
Merge of 2.6.x-xfs-melb:linux:29656b by kenmcd.

/*
 *	Adaptec AAC series RAID controller driver
 *	(c) Copyright 2001 Red Hat Inc.	<alan@redhat.com>
 *
 * based on the old aacraid driver that is..
 * Adaptec aacraid device driver for Linux.
 *
 * Copyright (c) 2000-2007 Adaptec, Inc. (aacraid@adaptec.com)
 *
 * 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, 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Module Name:
 *  rkt.c
 *
 * Abstract: Hardware miniport for Drawbridge specific hardware functions.
 *
 */

#include <linux/blkdev.h>

#include <scsi/scsi_host.h>

#include "aacraid.h"

#define AAC_NUM_IO_FIB_RKT      (246 - AAC_NUM_MGT_FIB)

/**
 *	aac_rkt_select_comm	-	Select communications method
 *	@dev: Adapter
 *	@comm: communications method
 */

static int aac_rkt_select_comm(struct aac_dev *dev, int comm)
{
	int retval;
	retval = aac_rx_select_comm(dev, comm);
	if (comm == AAC_COMM_MESSAGE) {
		/*
		 * FIB Setup has already been done, but we can minimize the
		 * damage by at least ensuring the OS never issues more
		 * commands than we can handle. The Rocket adapters currently
		 * can only handle 246 commands and 8 AIFs at the same time,
		 * and in fact do notify us accordingly if we negotiate the
		 * FIB size. The problem that causes us to add this check is
		 * to ensure that we do not overdo it with the adapter when a
		 * hard coded FIB override is being utilized. This special
		 * case warrants this half baked, but convenient, check here.
		 */
		if (dev->scsi_host_ptr->can_queue > AAC_NUM_IO_FIB_RKT) {
			dev->init->MaxIoCommands =
				cpu_to_le32(AAC_NUM_IO_FIB_RKT + AAC_NUM_MGT_FIB);
			dev->scsi_host_ptr->can_queue = AAC_NUM_IO_FIB_RKT;
		}
	}
	return retval;
}

/**
 *	aac_rkt_ioremap
 *	@size: mapping resize request
 *
 */
static int aac_rkt_ioremap(struct aac_dev * dev, u32 size)
{
	if (!size) {
		iounmap(dev->regs.rkt);
		return 0;
	}
	dev->base = dev->regs.rkt = ioremap(dev->scsi_host_ptr->base, size);
	if (dev->base == NULL)
		return -1;
	dev->IndexRegs = &dev->regs.rkt->IndexRegs;
	return 0;
}

/**
 *	aac_rkt_init	-	initialize an i960 based AAC card
 *	@dev: device to configure
 *
 *	Allocate and set up resources for the i960 based AAC variants. The 
 *	device_interface in the commregion will be allocated and linked 
 *	to the comm region.
 */

int aac_rkt_init(struct aac_dev *dev)
{
	/*
	 *	Fill in the function dispatch table.
	 */
	dev->a_ops.adapter_ioremap = aac_rkt_ioremap;
	dev->a_ops.adapter_comm = aac_rkt_select_comm;

	return _aac_rx_init(dev);
}