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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.

/*
 * Aic94xx SAS/SATA driver header file.
 *
 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
 *
 * This file is licensed under GPLv2.
 *
 * This file is part of the aic94xx driver.
 *
 * The aic94xx driver 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; version 2 of the
 * License.
 *
 * The aic94xx driver 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 the aic94xx driver; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * $Id: aic94xx.h,v 1.11 2007/09/12 17:09:56 tes.longdrop.melbourne.sgi.com Exp $
 */

#ifndef _AIC94XX_H_
#define _AIC94XX_H_

#include <linux/slab.h>
#include <linux/ctype.h>
#include <scsi/libsas.h>

#define ASD_DRIVER_NAME		"aic94xx"
#define ASD_DRIVER_DESCRIPTION	"Adaptec aic94xx SAS/SATA driver"

#define asd_printk(fmt, ...)	printk(KERN_NOTICE ASD_DRIVER_NAME ": " fmt, ## __VA_ARGS__)

#ifdef ASD_ENTER_EXIT
#define ENTER  printk(KERN_NOTICE "%s: ENTER %s\n", ASD_DRIVER_NAME, \
		__FUNCTION__)
#define EXIT   printk(KERN_NOTICE "%s: --EXIT %s\n", ASD_DRIVER_NAME, \
		__FUNCTION__)
#else
#define ENTER
#define EXIT
#endif

#ifdef ASD_DEBUG
#define ASD_DPRINTK asd_printk
#else
#define ASD_DPRINTK(fmt, ...)
#endif

/* 2*ITNL timeout + 1 second */
#define AIC94XX_SCB_TIMEOUT  (5*HZ)

extern struct kmem_cache *asd_dma_token_cache;
extern struct kmem_cache *asd_ascb_cache;
extern char sas_addr_str[2*SAS_ADDR_SIZE + 1];

static inline void asd_stringify_sas_addr(char *p, const u8 *sas_addr)
{
	int i;
	for (i = 0; i < SAS_ADDR_SIZE; i++, p += 2)
		snprintf(p, 3, "%02X", sas_addr[i]);
	*p = '\0';
}

static inline void asd_destringify_sas_addr(u8 *sas_addr, const char *p)
{
	int i;
	for (i = 0; i < SAS_ADDR_SIZE; i++) {
		u8 h, l;
		if (!*p)
			break;
		h = isdigit(*p) ? *p-'0' : *p-'A'+10;
		p++;
		l = isdigit(*p) ? *p-'0' : *p-'A'+10;
		p++;
		sas_addr[i] = (h<<4) | l;
	}
}

struct asd_ha_struct;
struct asd_ascb;

int  asd_read_ocm(struct asd_ha_struct *asd_ha);
int  asd_read_flash(struct asd_ha_struct *asd_ha);

int  asd_dev_found(struct domain_device *dev);
void asd_dev_gone(struct domain_device *dev);

void asd_invalidate_edb(struct asd_ascb *ascb, int edb_id);

int  asd_execute_task(struct sas_task *, int num, gfp_t gfp_flags);

/* ---------- TMFs ---------- */
int  asd_abort_task(struct sas_task *);
int  asd_abort_task_set(struct domain_device *, u8 *lun);
int  asd_clear_aca(struct domain_device *, u8 *lun);
int  asd_clear_task_set(struct domain_device *, u8 *lun);
int  asd_lu_reset(struct domain_device *, u8 *lun);
int  asd_query_task(struct sas_task *);

/* ---------- Adapter and Port management ---------- */
int  asd_clear_nexus_port(struct asd_sas_port *port);
int  asd_clear_nexus_ha(struct sas_ha_struct *sas_ha);

/* ---------- Phy Management ---------- */
int  asd_control_phy(struct asd_sas_phy *phy, enum phy_func func, void *arg);

#endif