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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/arm/mach-s3c2410/mach-n30.c
 *
 * Copyright (c) 2003-2005 Simtec Electronics
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * Copyright (c) 2005 Christer Weinigel <christer@weinigel.se>
 *
 * There is a wiki with more information about the n30 port at
 * http://handhelds.org/moin/moin.cgi/AcerN30Documentation .
 *
 * 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/types.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>
#include <linux/kthread.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>

#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach-types.h>

#include <asm/plat-s3c/regs-serial.h>
#include <asm/arch/regs-gpio.h>
#include <asm/plat-s3c/iic.h>

#include <asm/plat-s3c24xx/s3c2410.h>
#include <asm/plat-s3c24xx/clock.h>
#include <asm/plat-s3c24xx/devs.h>
#include <asm/plat-s3c24xx/cpu.h>

static struct map_desc n30_iodesc[] __initdata = {
	/* nothing here yet */
};

static struct s3c2410_uartcfg n30_uartcfgs[] = {
	/* Normal serial port */
	[0] = {
		.hwport	     = 0,
		.flags	     = 0,
		.ucon	     = 0x2c5,
		.ulcon	     = 0x03,
		.ufcon	     = 0x51,
	},
	/* IR port */
	[1] = {
		.hwport	     = 1,
		.flags	     = 0,
		.uart_flags  = UPF_CONS_FLOW,
		.ucon	     = 0x2c5,
		.ulcon	     = 0x43,
		.ufcon	     = 0x51,
	},
	/* The BlueTooth controller is connected to port 2 */
	[2] = {
		.hwport	     = 2,
		.flags	     = 0,
		.ucon	     = 0x2c5,
		.ulcon	     = 0x03,
		.ufcon	     = 0x51,
	},
};

static struct platform_device *n30_devices[] __initdata = {
	&s3c_device_usb,
	&s3c_device_lcd,
	&s3c_device_wdt,
	&s3c_device_i2c,
	&s3c_device_iis,
	&s3c_device_usbgadget,
};

static struct s3c2410_platform_i2c n30_i2ccfg = {
	.flags		= 0,
	.slave_addr	= 0x10,
	.bus_freq	= 10*1000,
	.max_freq	= 10*1000,
};

static void __init n30_map_io(void)
{
	s3c24xx_init_io(n30_iodesc, ARRAY_SIZE(n30_iodesc));
	s3c24xx_init_clocks(0);
	s3c24xx_init_uarts(n30_uartcfgs, ARRAY_SIZE(n30_uartcfgs));
}

static void __init n30_init_irq(void)
{
	s3c24xx_init_irq();
}

/* GPB3 is the line that controls the pull-up for the USB D+ line */

static void __init n30_init(void)
{
	s3c_device_i2c.dev.platform_data = &n30_i2ccfg;

	/* Turn off suspend on both USB ports, and switch the
	 * selectable USB port to USB device mode. */

	s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
			      S3C2410_MISCCR_USBSUSPND0 |
			      S3C2410_MISCCR_USBSUSPND1, 0x0);

	platform_add_devices(n30_devices, ARRAY_SIZE(n30_devices));
}

MACHINE_START(N30, "Acer-N30")
	/* Maintainer: Christer Weinigel <christer@weinigel.se>,
				Ben Dooks <ben-linux@fluff.org>
	*/
	.phys_io	= S3C2410_PA_UART,
	.io_pg_offst	= (((u32)S3C24XX_VA_UART) >> 18) & 0xfffc,
	.boot_params	= S3C2410_SDRAM_PA + 0x100,
	.timer		= &s3c24xx_timer,
	.init_machine	= n30_init,
	.init_irq	= n30_init_irq,
	.map_io		= n30_map_io,
MACHINE_END

/*
    Local variables:
        compile-command: "make ARCH=arm CROSS_COMPILE=/usr/local/arm/3.3.2/bin/arm-linux- -k -C ../../.."
        c-basic-offset: 8
    End:
*/