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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.

#ifndef _DVB_USB_M920X_H_
#define _DVB_USB_M920X_H_

#define DVB_USB_LOG_PREFIX "m920x"
#include "dvb-usb.h"

#define deb(args...)   dprintk(dvb_usb_m920x_debug,0x01,args)

#define M9206_CORE	0x22
#define M9206_RC_STATE	0xff51
#define M9206_RC_KEY	0xff52
#define M9206_RC_INIT1	0xff54
#define M9206_RC_INIT2	0xff55
#define M9206_FW_GO	0xff69

#define M9206_I2C	0x23
#define M9206_FILTER	0x25
#define M9206_FW	0x30

#define M9206_MAX_FILTERS 8
#define M9206_MAX_ADAPTERS 2

/*
sequences found in logs:
[index value]
0x80 write addr
(0x00 out byte)*
0x40 out byte

0x80 write addr
(0x00 out byte)*
0x80 read addr
(0x21 in byte)*
0x60 in byte

this sequence works:
0x80 read addr
(0x21 in byte)*
0x60 in byte

Guess at API of the I2C function:
I2C operation is done one byte at a time with USB control messages.  The
index the messages is sent to is made up of a set of flags that control
the I2C bus state:
0x80:  Send START condition.  After a START condition, one would normally
       always send the 7-bit slave I2C address as the 7 MSB, followed by
       the read/write bit as the LSB.
0x40:  Send STOP condition.  This should be set on the last byte of an
       I2C transaction.
0x20:  Read a byte from the slave.  As opposed to writing a byte to the
       slave.  The slave will normally not produce any data unless you
       set the R/W bit to 1 when sending the slave's address after the
       START condition.
0x01:  Respond with ACK, as opposed to a NACK.  For a multi-byte read,
       the master should send an ACK, that is pull SDA low during the 9th
       clock cycle, after every byte but the last.  This flags only makes
       sense when bit 0x20 is set, indicating a read.

What any other bits might mean, or how to get the slave's ACK/NACK
response to a write, is unknown.
*/

struct m920x_state {
	u16 filters[M9206_MAX_ADAPTERS][M9206_MAX_FILTERS];
	int filtering_enabled[M9206_MAX_ADAPTERS];
	int rep_count;
};

/* Initialisation data for the m920x
 */

struct m920x_inits {
	u16 address;
	u8  data;
};

#endif