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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.

/******************************************************************************
 *
 * Name: acstruct.h - Internal structs
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2007, R. Byron Moore
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#ifndef __ACSTRUCT_H__
#define __ACSTRUCT_H__

/* acpisrc:struct_defs -- for acpisrc conversion */

/*****************************************************************************
 *
 * Tree walking typedefs and structs
 *
 ****************************************************************************/

/*
 * Walk state - current state of a parse tree walk.  Used for both a leisurely
 * stroll through the tree (for whatever reason), and for control method
 * execution.
 */
#define ACPI_NEXT_OP_DOWNWARD       1
#define ACPI_NEXT_OP_UPWARD         2

/*
 * Groups of definitions for walk_type used for different implementations of
 * walkers (never simultaneously) - flags for interpreter:
 */
#define ACPI_WALK_NON_METHOD        0
#define ACPI_WALK_METHOD            0x01
#define ACPI_WALK_METHOD_RESTART    0x02

/* Flags for i_aSL compiler only */

#define ACPI_WALK_CONST_REQUIRED    0x10
#define ACPI_WALK_CONST_OPTIONAL    0x20

struct acpi_walk_state {
	struct acpi_walk_state *next;	/* Next walk_state in list */
	u8 descriptor_type;	/* To differentiate various internal objs */
	u8 walk_type;
	u16 opcode;		/* Current AML opcode */
	u8 next_op_info;	/* Info about next_op */
	u8 num_operands;	/* Stack pointer for Operands[] array */
	acpi_owner_id owner_id;	/* Owner of objects created during the walk */
	u8 last_predicate;	/* Result of last predicate */
	u8 current_result;
	u8 return_used;
	u8 scope_depth;
	u8 pass_number;		/* Parse pass during table load */
	u32 aml_offset;
	u32 arg_types;
	u32 method_breakpoint;	/* For single stepping */
	u32 user_breakpoint;	/* User AML breakpoint */
	u32 parse_flags;

	struct acpi_parse_state parser_state;	/* Current state of parser */
	u32 prev_arg_types;
	u32 arg_count;		/* push for fixed or var args */

	struct acpi_namespace_node arguments[ACPI_METHOD_NUM_ARGS];	/* Control method arguments */
	struct acpi_namespace_node local_variables[ACPI_METHOD_NUM_LOCALS];	/* Control method locals */
	union acpi_operand_object *operands[ACPI_OBJ_NUM_OPERANDS + 1];	/* Operands passed to the interpreter (+1 for NULL terminator) */
	union acpi_operand_object **params;

	u8 *aml_last_while;
	union acpi_operand_object **caller_return_desc;
	union acpi_generic_state *control_state;	/* List of control states (nested IFs) */
	struct acpi_namespace_node *deferred_node;	/* Used when executing deferred opcodes */
	struct acpi_gpe_event_info *gpe_event_info;	/* Info for GPE (_Lxx/_Exx methods only */
	union acpi_operand_object *implicit_return_obj;
	struct acpi_namespace_node *method_call_node;	/* Called method Node */
	union acpi_parse_object *method_call_op;	/* method_call Op if running a method */
	union acpi_operand_object *method_desc;	/* Method descriptor if running a method */
	struct acpi_namespace_node *method_node;	/* Method node if running a method. */
	union acpi_parse_object *op;	/* Current parser op */
	const struct acpi_opcode_info *op_info;	/* Info on current opcode */
	union acpi_parse_object *origin;	/* Start of walk [Obsolete] */
	union acpi_operand_object *result_obj;
	union acpi_generic_state *results;	/* Stack of accumulated results */
	union acpi_operand_object *return_desc;	/* Return object, if any */
	union acpi_generic_state *scope_info;	/* Stack of nested scopes */
	union acpi_parse_object *prev_op;	/* Last op that was processed */
	union acpi_parse_object *next_op;	/* next op to be processed */
	struct acpi_thread_state *thread;
	acpi_parse_downwards descending_callback;
	acpi_parse_upwards ascending_callback;
};

/* Info used by acpi_ps_init_objects */

struct acpi_init_walk_info {
	u16 method_count;
	u16 device_count;
	u16 op_region_count;
	u16 field_count;
	u16 buffer_count;
	u16 package_count;
	u16 op_region_init;
	u16 field_init;
	u16 buffer_init;
	u16 package_init;
	u16 object_count;
	acpi_owner_id owner_id;
	acpi_native_uint table_index;
};

struct acpi_get_devices_info {
	acpi_walk_callback user_function;
	void *context;
	const char *hid;
};

union acpi_aml_operands {
	union acpi_operand_object *operands[7];

	struct {
		struct acpi_object_integer *type;
		struct acpi_object_integer *code;
		struct acpi_object_integer *argument;

	} fatal;

	struct {
		union acpi_operand_object *source;
		struct acpi_object_integer *index;
		union acpi_operand_object *target;

	} index;

	struct {
		union acpi_operand_object *source;
		struct acpi_object_integer *index;
		struct acpi_object_integer *length;
		union acpi_operand_object *target;

	} mid;
};

/*
 * Structure used to pass object evaluation parameters.
 * Purpose is to reduce CPU stack use.
 */
struct acpi_evaluate_info {
	struct acpi_namespace_node *prefix_node;
	char *pathname;
	union acpi_operand_object *obj_desc;
	union acpi_operand_object **parameters;
	struct acpi_namespace_node *resolved_node;
	union acpi_operand_object *return_object;
	u8 pass_number;
	u8 parameter_type;
	u8 return_object_type;
	u8 flags;
};

/* Types for parameter_type above */

#define ACPI_PARAM_ARGS                 0
#define ACPI_PARAM_GPE                  1

/* Values for Flags above */

#define ACPI_IGNORE_RETURN_VALUE        1

/* Info used by acpi_ns_initialize_devices */

struct acpi_device_walk_info {
	u16 device_count;
	u16 num_STA;
	u16 num_INI;
	struct acpi_table_desc *table_desc;
	struct acpi_evaluate_info *evaluate_info;
};

/* TBD: [Restructure] Merge with struct above */

struct acpi_walk_info {
	u32 debug_level;
	u32 count;
	acpi_owner_id owner_id;
	u8 display_type;
};

/* Display Types */

#define ACPI_DISPLAY_SUMMARY        (u8) 0
#define ACPI_DISPLAY_OBJECTS        (u8) 1
#define ACPI_DISPLAY_MASK           (u8) 1

#define ACPI_DISPLAY_SHORT          (u8) 2

#endif