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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:

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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
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Merge of 2.6.x-xfs-melb:linux:29656b by kenmcd.

Kernel driver thmc50
=====================

Supported chips:
  * Analog Devices ADM1022
    Prefix: 'adm1022'
    Addresses scanned: I2C 0x2c - 0x2e
    Datasheet: http://www.analog.com/en/prod/0,2877,ADM1022,00.html
  * Texas Instruments THMC50
    Prefix: 'thmc50'
    Addresses scanned: I2C 0x2c - 0x2e
    Datasheet: http://focus.ti.com/docs/prod/folders/print/thmc50.html

Author: Krzysztof Helt <krzysztof.h1@wp.pl>

This driver was derived from the 2.4 kernel thmc50.c source file.

Credits:
  thmc50.c (2.4 kernel):
	Frodo Looijaard <frodol@dds.nl>
	Philip Edelbrock <phil@netroedge.com>

Module Parameters
-----------------

* adm1022_temp3: short array
  List of adapter,address pairs to force chips into ADM1022 mode with
  second remote temperature. This does not work for original THMC50 chips.

Description
-----------

The THMC50 implements: an internal temperature sensor, support for an
external diode-type temperature sensor (compatible w/ the diode sensor inside
many processors), and a controllable fan/analog_out DAC. For the temperature
sensors, limits can be set through the appropriate Overtemperature Shutdown
register and Hysteresis register. Each value can be set and read to half-degree
accuracy.  An alarm is issued (usually to a connected LM78) when the
temperature gets higher then the Overtemperature Shutdown value; it stays on
until the temperature falls below the Hysteresis value. All temperatures are in
degrees Celsius, and are guaranteed within a range of -55 to +125 degrees.

The THMC50 only updates its values each 1.5 seconds; reading it more often
will do no harm, but will return 'old' values.

The THMC50 is usually used in combination with LM78-like chips, to measure
the temperature of the processor(s).

The ADM1022 works the same as THMC50 but it is faster (5 Hz instead of
1 Hz for THMC50). It can be also put in a new mode to handle additional
remote temperature sensor. The driver use the mode set by BIOS by default.

In case the BIOS is broken and the mode is set incorrectly, you can force
the mode with additional remote temperature with adm1022_temp3 parameter.
A typical symptom of wrong setting is a fan forced to full speed.

Driver Features
---------------

The driver provides up to three temperatures:

temp1		-- internal
temp2		-- remote
temp3		-- 2nd remote only for ADM1022

pwm1		-- fan speed (0 = stop, 255 = full)
pwm1_mode	-- always 0 (DC mode)

The value of 0 for pwm1 also forces FAN_OFF signal from the chip,
so it stops fans even if the value 0 into the ANALOG_OUT register does not.

The driver was tested on Compaq AP550 with two ADM1022 chips (one works
in the temp3 mode), five temperature readings and two fans.