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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 abituguru
=======================

Supported chips:
  * Abit uGuru revision 1 & 2 (Hardware Monitor part only)
    Prefix: 'abituguru'
    Addresses scanned: ISA 0x0E0
    Datasheet: Not available, this driver is based on reverse engineering.
	A "Datasheet" has been written based on the reverse engineering it
	should be available in the same dir as this file under the name
	abituguru-datasheet.
    Note:
	The uGuru is a microcontroller with onboard firmware which programs
	it to behave as a hwmon IC. There are many different revisions of the
	firmware and thus effectivly many different revisions of the uGuru.
	Below is an incomplete list with which revisions are used for which
	Motherboards:
	uGuru 1.00    ~ 1.24    (AI7, KV8-MAX3, AN7) (1)
	uGuru 2.0.0.0 ~ 2.0.4.2 (KV8-PRO)
	uGuru 2.1.0.0 ~ 2.1.2.8 (AS8, AV8, AA8, AG8, AA8XE, AX8)
	uGuru 2.2.0.0 ~ 2.2.0.6 (AA8 Fatal1ty)
	uGuru 2.3.0.0 ~ 2.3.0.9 (AN8)
	uGuru 3.0.0.0 ~ 3.0.x.x (AW8, AL8, AT8, NI8 SLI, AT8 32X, AN8 32X,
				 AW9D-MAX) (2)
	1) For revisions 2 and 3 uGuru's the driver can autodetect the
	   sensortype (Volt or Temp) for bank1 sensors, for revision 1 uGuru's
	   this doesnot always work. For these uGuru's the autodection can
	   be overriden with the bank1_types module param. For all 3 known
	   revison 1 motherboards the correct use of this param is:
	   bank1_types=1,1,0,0,0,0,0,2,0,0,0,0,2,0,0,1
	   You may also need to specify the fan_sensors option for these boards
	   fan_sensors=5
	2) There is a seperate abituguru3 driver for these motherboards,
	   the abituguru (without the 3 !) driver will not work on these
	   motherboards (and visa versa)!

Authors:
	Hans de Goede <j.w.r.degoede@hhs.nl>,
	(Initial reverse engineering done by Olle Sandberg
	 <ollebull@gmail.com>)


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

* force: bool		Force detection. Note this parameter only causes the
			detection to be skipped, and thus the insmod to
			succeed. If the uGuru can't be read the actual hwmon
			driver will not load and thus no hwmon device will get
			registered.
* bank1_types: int[]	Bank1 sensortype autodetection override:
			  -1 autodetect (default)
			   0 volt sensor
			   1 temp sensor
			   2 not connected
* fan_sensors: int	Tell the driver how many fan speed sensors there are
			on your motherboard. Default: 0 (autodetect).
* pwms: int		Tell the driver how many fan speed controls (fan
			pwms) your motherboard has. Default: 0 (autodetect).
* verbose: int		How verbose should the driver be? (0-3):
			   0 normal output
			   1 + verbose error reporting
			   2 + sensors type probing info (default)
			   3 + retryable error reporting
			Default: 2 (the driver is still in the testing phase)

Notice if you need any of the first three options above please insmod the
driver with verbose set to 3 and mail me <j.w.r.degoede@hhs.nl> the output of:
dmesg | grep abituguru


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

This driver supports the hardware monitoring features of the first and
second revision of the Abit uGuru chip found on Abit uGuru featuring
motherboards (most modern Abit motherboards).

The first and second revision of the uGuru chip in reality is a Winbond
W83L950D in disguise (despite Abit claiming it is "a new microprocessor
designed by the ABIT Engineers"). Unfortunatly this doesn't help since the
W83L950D is a generic microcontroller with a custom Abit application running
on it.

Despite Abit not releasing any information regarding the uGuru, Olle
Sandberg <ollebull@gmail.com> has managed to reverse engineer the sensor part
of the uGuru. Without his work this driver would not have been possible.

Known Issues
------------

The voltage and frequency control parts of the Abit uGuru are not supported.