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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/arch/sh/boards/se/7780/irq.c
 *
 * Copyright (C) 2006,2007  Nobuhiro Iwamatsu
 *
 * Hitachi UL SolutionEngine 7780 Support.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/se7780.h>

static struct intc2_data intc2_irq_table[] = {
	{ 2,  0, 31, 0, 31, 3 }, /* daughter board EXTINT1 */
	{ 4,  0, 30, 0, 30, 3 }, /* daughter board EXTINT2 */
	{ 6,  0, 29, 0, 29, 3 }, /* daughter board EXTINT3 */
	{ 8,  0, 28, 0, 28, 3 }, /* SMC 91C111 (LAN) */
	{ 10, 0, 27, 0, 27, 3 }, /* daughter board EXTINT4 */
	{ 4,  0, 30, 0, 30, 3 }, /* daughter board EXTINT5 */
	{ 2,  0, 31, 0, 31, 3 }, /* daughter board EXTINT6 */
	{ 2,  0, 31, 0, 31, 3 }, /* daughter board EXTINT7 */
	{ 2,  0, 31, 0, 31, 3 }, /* daughter board EXTINT8 */
	{ 0 , 0, 24, 0, 24, 3 }, /* SM501 */
};

static struct intc2_desc intc2_irq_desc __read_mostly = {
	.prio_base	= 0, /* N/A */
	.msk_base	= 0xffd00044,
	.mskclr_base	= 0xffd00064,

	.intc2_data	= intc2_irq_table,
	.nr_irqs	= ARRAY_SIZE(intc2_irq_table),

	.chip = {
		.name	= "INTC2-se7780",
	},
};

/*
 * Initialize IRQ setting
 */
void __init init_se7780_IRQ(void)
{
	/* enable all interrupt at FPGA */
	ctrl_outw(0, FPGA_INTMSK1);
	/* mask SM501 interrupt */
	ctrl_outw((ctrl_inw(FPGA_INTMSK1) | 0x0002), FPGA_INTMSK1);
	/* enable all interrupt at FPGA */
	ctrl_outw(0, FPGA_INTMSK2);

	/* set FPGA INTSEL register */
	/* FPGA + 0x06 */
	ctrl_outw( ((IRQPIN_SM501 << IRQPOS_SM501) |
		(IRQPIN_SMC91CX << IRQPOS_SMC91CX)), FPGA_INTSEL1);

	/* FPGA + 0x08 */
	ctrl_outw(((IRQPIN_EXTINT4 << IRQPOS_EXTINT4) |
		(IRQPIN_EXTINT3 << IRQPOS_EXTINT3) |
		(IRQPIN_EXTINT2 << IRQPOS_EXTINT2) |
		(IRQPIN_EXTINT1 << IRQPOS_EXTINT1)), FPGA_INTSEL2);

	/* FPGA + 0x0A */
	ctrl_outw((IRQPIN_PCCPW << IRQPOS_PCCPW), FPGA_INTSEL3);

	register_intc2_controller(&intc2_irq_desc);
}