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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.

/*
 * arch/arm/mach-iop33x/iq80331.c
 *
 * Board support code for the Intel IQ80331 platform.
 *
 * Author: Dave Jiang <dave.jiang@intel.com>
 * Copyright (C) 2003 Intel Corp.
 *
 * 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.
 */

#include <linux/mm.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/mtd/physmap.h>
#include <linux/platform_device.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/pci.h>
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/arch/time.h>

/*
 * IQ80331 timer tick configuration.
 */
static void __init iq80331_timer_init(void)
{
	/* D-Step parts run at a higher internal bus frequency */
	if (*IOP3XX_ATURID >= 0xa)
		iop_init_time(333000000);
	else
		iop_init_time(266000000);
}

static struct sys_timer iq80331_timer = {
	.init		= iq80331_timer_init,
	.offset		= iop_gettimeoffset,
};


/*
 * IQ80331 PCI.
 */
static int __init
iq80331_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
	int irq;

	if (slot == 1 && pin == 1) {
		/* PCI-X Slot INTA */
		irq = IRQ_IOP33X_XINT1;
	} else if (slot == 1 && pin == 2) {
		/* PCI-X Slot INTB */
		irq = IRQ_IOP33X_XINT2;
	} else if (slot == 1 && pin == 3) {
		/* PCI-X Slot INTC */
		irq = IRQ_IOP33X_XINT3;
	} else if (slot == 1 && pin == 4) {
		/* PCI-X Slot INTD */
		irq = IRQ_IOP33X_XINT0;
	} else if (slot == 2) {
		/* GigE */
		irq = IRQ_IOP33X_XINT2;
	} else {
		printk(KERN_ERR "iq80331_pci_map_irq() called for unknown "
			"device PCI:%d:%d:%d\n", dev->bus->number,
			PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
		irq = -1;
	}

	return irq;
}

static struct hw_pci iq80331_pci __initdata = {
	.swizzle	= pci_std_swizzle,
	.nr_controllers = 1,
	.setup		= iop3xx_pci_setup,
	.preinit	= iop3xx_pci_preinit,
	.scan		= iop3xx_pci_scan_bus,
	.map_irq	= iq80331_pci_map_irq,
};

static int __init iq80331_pci_init(void)
{
	if ((iop3xx_get_init_atu() == IOP3XX_INIT_ATU_ENABLE) &&
		machine_is_iq80331())
		pci_common_init(&iq80331_pci);

	return 0;
}

subsys_initcall(iq80331_pci_init);


/*
 * IQ80331 machine initialisation.
 */
static struct physmap_flash_data iq80331_flash_data = {
	.width		= 1,
};

static struct resource iq80331_flash_resource = {
	.start		= 0xc0000000,
	.end		= 0xc07fffff,
	.flags		= IORESOURCE_MEM,
};

static struct platform_device iq80331_flash_device = {
	.name		= "physmap-flash",
	.id		= 0,
	.dev		= {
		.platform_data	= &iq80331_flash_data,
	},
	.num_resources	= 1,
	.resource	= &iq80331_flash_resource,
};

static void __init iq80331_init_machine(void)
{
	platform_device_register(&iop3xx_i2c0_device);
	platform_device_register(&iop3xx_i2c1_device);
	platform_device_register(&iop33x_uart0_device);
	platform_device_register(&iop33x_uart1_device);
	platform_device_register(&iq80331_flash_device);
	platform_device_register(&iop3xx_dma_0_channel);
	platform_device_register(&iop3xx_dma_1_channel);
	platform_device_register(&iop3xx_aau_channel);
}

MACHINE_START(IQ80331, "Intel IQ80331")
	/* Maintainer: Intel Corp. */
	.phys_io	= 0xfefff000,
	.io_pg_offst	= ((0xfffff000) >> 18) & 0xfffc,
	.boot_params	= 0x00000100,
	.map_io		= iop3xx_map_io,
	.init_irq	= iop33x_init_irq,
	.timer		= &iq80331_timer,
	.init_machine	= iq80331_init_machine,
MACHINE_END