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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 IEEE1394_HIGHLEVEL_H
#define IEEE1394_HIGHLEVEL_H

#include <linux/list.h>
#include <linux/spinlock_types.h>
#include <linux/types.h>

struct module;

#include "ieee1394_types.h"

struct hpsb_host;

/* internal to ieee1394 core */
struct hpsb_address_serve {
	struct list_head host_list;	/* per host list */
	struct list_head hl_list;	/* hpsb_highlevel list */
	struct hpsb_address_ops *op;
	struct hpsb_host *host;
	u64 start;	/* first address handled, quadlet aligned */
	u64 end;	/* first address behind, quadlet aligned */
};

/* Only the following structures are of interest to actual highlevel drivers. */

struct hpsb_highlevel {
	const char *name;

	/* Any of the following pointers can legally be NULL. */

	/* New host initialized.  Will also be called during
	 * hpsb_register_highlevel for all hosts already installed. */
	void (*add_host)(struct hpsb_host *host);

	/* Host about to be removed.  Will also be called during
	 * hpsb_unregister_highlevel once for each host. */
	void (*remove_host)(struct hpsb_host *host);

	/* Host experienced bus reset with possible configuration changes.
	 * Note that this one may occur during interrupt/bottom half handling.
	 * You can not expect to be able to do stock hpsb_reads. */
	void (*host_reset)(struct hpsb_host *host);

	/* A write request was received on either the FCP_COMMAND (direction =
	 * 0) or the FCP_RESPONSE (direction = 1) register.  The cts arg
	 * contains the cts field (first byte of data). */
	void (*fcp_request)(struct hpsb_host *host, int nodeid, int direction,
			    int cts, u8 *data, size_t length);

	/* These are initialized by the subsystem when the
	 * hpsb_higlevel is registered. */
	struct list_head hl_list;
	struct list_head irq_list;
	struct list_head addr_list;

	struct list_head host_info_list;
	rwlock_t host_info_lock;
};

struct hpsb_address_ops {
	/*
	 * Null function pointers will make the respective operation complete
	 * with RCODE_TYPE_ERROR.  Makes for easy to implement read-only
	 * registers (just leave everything but read NULL).
	 *
	 * All functions shall return appropriate IEEE 1394 rcodes.
	 */

	/* These functions have to implement block reads for themselves.
	 *
	 * These functions either return a response code or a negative number.
	 * In the first case a response will be generated.  In the latter case,
	 * no response will be sent and the driver which handled the request
	 * will send the response itself. */
	int (*read)(struct hpsb_host *host, int nodeid, quadlet_t *buffer,
		    u64 addr, size_t length, u16 flags);
	int (*write)(struct hpsb_host *host, int nodeid, int destid,
		     quadlet_t *data, u64 addr, size_t length, u16 flags);

	/* Lock transactions: write results of ext_tcode operation into
	 * *store. */
	int (*lock)(struct hpsb_host *host, int nodeid, quadlet_t *store,
		    u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
		    u16 flags);
	int (*lock64)(struct hpsb_host *host, int nodeid, octlet_t *store,
		      u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
		      u16 flags);
};

void highlevel_add_host(struct hpsb_host *host);
void highlevel_remove_host(struct hpsb_host *host);
void highlevel_host_reset(struct hpsb_host *host);
int highlevel_read(struct hpsb_host *host, int nodeid, void *data, u64 addr,
		   unsigned int length, u16 flags);
int highlevel_write(struct hpsb_host *host, int nodeid, int destid, void *data,
		    u64 addr, unsigned int length, u16 flags);
int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
		   u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
		   u16 flags);
int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
		     u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
		     u16 flags);
void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
			   void *data, size_t length);

void hpsb_register_highlevel(struct hpsb_highlevel *hl);
void hpsb_unregister_highlevel(struct hpsb_highlevel *hl);

u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
					 struct hpsb_host *host,
					 struct hpsb_address_ops *ops,
					 u64 size, u64 alignment,
					 u64 start, u64 end);
int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
			    struct hpsb_address_ops *ops, u64 start, u64 end);
int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
			      u64 start);

void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
			   size_t data_size);
void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host,
			   unsigned long key);
void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key);
int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
		      void *data);

#endif /* IEEE1394_HIGHLEVEL_H */