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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.

/*
 * Copyright (C) 2005-2006  Kristian Hoegsberg <krh@bitplanet.net>
 *
 * 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 to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef __fw_device_h
#define __fw_device_h

#include <linux/fs.h>
#include <linux/cdev.h>
#include <asm/atomic.h>

enum fw_device_state {
	FW_DEVICE_INITIALIZING,
	FW_DEVICE_RUNNING,
	FW_DEVICE_SHUTDOWN,
};

struct fw_attribute_group {
	struct attribute_group *groups[2];
	struct attribute_group group;
	struct attribute *attrs[11];
};

struct fw_device {
	atomic_t state;
	struct fw_node *node;
	int node_id;
	int generation;
	unsigned max_speed;
	struct fw_card *card;
	struct device device;
	struct list_head link;
	struct list_head client_list;
	u32 *config_rom;
	size_t config_rom_length;
	int config_rom_retries;
	struct delayed_work work;
	struct fw_attribute_group attribute_group;
};

static inline struct fw_device *
fw_device(struct device *dev)
{
	return container_of(dev, struct fw_device, device);
}

static inline int
fw_device_is_shutdown(struct fw_device *device)
{
	return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
}

struct fw_device *fw_device_get(struct fw_device *device);
void fw_device_put(struct fw_device *device);
int fw_device_enable_phys_dma(struct fw_device *device);

void fw_device_cdev_update(struct fw_device *device);
void fw_device_cdev_remove(struct fw_device *device);

struct fw_device *fw_device_from_devt(dev_t devt);
extern int fw_cdev_major;

struct fw_unit {
	struct device device;
	u32 *directory;
	struct fw_attribute_group attribute_group;
};

static inline struct fw_unit *
fw_unit(struct device *dev)
{
	return container_of(dev, struct fw_unit, device);
}

#define CSR_OFFSET	0x40
#define CSR_LEAF	0x80
#define CSR_DIRECTORY	0xc0

#define CSR_DESCRIPTOR		0x01
#define CSR_VENDOR		0x03
#define CSR_HARDWARE_VERSION	0x04
#define CSR_NODE_CAPABILITIES	0x0c
#define CSR_UNIT		0x11
#define CSR_SPECIFIER_ID	0x12
#define CSR_VERSION		0x13
#define CSR_DEPENDENT_INFO	0x14
#define CSR_MODEL		0x17
#define CSR_INSTANCE		0x18
#define CSR_DIRECTORY_ID	0x20

#define SBP2_COMMAND_SET_SPECIFIER	0x38
#define SBP2_COMMAND_SET		0x39
#define SBP2_COMMAND_SET_REVISION	0x3b
#define SBP2_FIRMWARE_REVISION		0x3c

struct fw_csr_iterator {
	u32 *p;
	u32 *end;
};

void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
int fw_csr_iterator_next(struct fw_csr_iterator *ci,
			 int *key, int *value);

#define FW_MATCH_VENDOR		0x0001
#define FW_MATCH_MODEL		0x0002
#define FW_MATCH_SPECIFIER_ID	0x0004
#define FW_MATCH_VERSION	0x0008

struct fw_device_id {
	u32 match_flags;
	u32 vendor;
	u32 model;
	u32 specifier_id;
	u32 version;
	void *driver_data;
};

struct fw_driver {
	struct device_driver driver;
	/* Called when the parent device sits through a bus reset. */
	void (*update) (struct fw_unit *unit);
	const struct fw_device_id *id_table;
};

static inline struct fw_driver *
fw_driver(struct device_driver *drv)
{
	return container_of(drv, struct fw_driver, driver);
}

extern const struct file_operations fw_device_ops;

#endif /* __fw_device_h */