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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.

/*
 * linux/drivers/leds/leds-locomo.c
 *
 * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/leds.h>

#include <asm/hardware.h>
#include <asm/hardware/locomo.h>

static void locomoled_brightness_set(struct led_classdev *led_cdev,
				enum led_brightness value, int offset)
{
	struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev);
	unsigned long flags;

	local_irq_save(flags);
	if (value)
		locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset);
	else
		locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset);
	local_irq_restore(flags);
}

static void locomoled_brightness_set0(struct led_classdev *led_cdev,
				enum led_brightness value)
{
	locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0);
}

static void locomoled_brightness_set1(struct led_classdev *led_cdev,
				enum led_brightness value)
{
	locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1);
}

static struct led_classdev locomo_led0 = {
	.name			= "locomo:amber",
	.default_trigger	= "sharpsl-charge",
	.brightness_set		= locomoled_brightness_set0,
};

static struct led_classdev locomo_led1 = {
	.name			= "locomo:green",
	.default_trigger	= "nand-disk",
	.brightness_set		= locomoled_brightness_set1,
};

static int locomoled_probe(struct locomo_dev *ldev)
{
	int ret;

	ret = led_classdev_register(&ldev->dev, &locomo_led0);
	if (ret < 0)
		return ret;

	ret = led_classdev_register(&ldev->dev, &locomo_led1);
	if (ret < 0)
		led_classdev_unregister(&locomo_led0);

	return ret;
}

static int locomoled_remove(struct locomo_dev *dev)
{
	led_classdev_unregister(&locomo_led0);
	led_classdev_unregister(&locomo_led1);
	return 0;
}

static struct locomo_driver locomoled_driver = {
	.drv = {
		.name = "locomoled"
	},
	.devid	= LOCOMO_DEVID_LED,
	.probe	= locomoled_probe,
	.remove	= locomoled_remove,
};

static int __init locomoled_init(void)
{
	return locomo_driver_register(&locomoled_driver);
}
module_init(locomoled_init);

MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
MODULE_DESCRIPTION("Locomo LED driver");
MODULE_LICENSE("GPL");