New upstream release Closes: #849353, #817806, #854915, #845473

1 files changed, 0 insertions, 849 deletions

diff --git a/radix-tree.c b/radix-tree.c
deleted file mode 100644
index f259ab56..00000000
--- a/radix-tree.c
+++ /dev/null
@@ -1,849 +0,0 @@
-/*
- * Copyright (C) 2007 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License v2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- */
-
-/*
- * Copyright (C) 2001 Momchil Velikov
- * Portions Copyright (C) 2001 Christoph Hellwig
- * Copyright (C) 2005 SGI, Christoph Lameter <clameter@sgi.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include "kerncompat.h"
-#include "radix-tree.h"
-#ifdef __KERNEL__
-#define RADIX_TREE_MAP_SHIFT	(CONFIG_BASE_SMALL ? 4 : 6)
-#else
-#define RADIX_TREE_MAP_SHIFT	3	/* For more stressful testing */
-#endif
-
-#define RADIX_TREE_MAP_SIZE	(1UL << RADIX_TREE_MAP_SHIFT)
-#define RADIX_TREE_MAP_MASK	(RADIX_TREE_MAP_SIZE-1)
-
-#define RADIX_TREE_TAG_LONGS	\
-	((RADIX_TREE_MAP_SIZE + BITS_PER_LONG - 1) / BITS_PER_LONG)
-
-struct radix_tree_node {
-	unsigned int	count;
-	void		*slots[RADIX_TREE_MAP_SIZE];
-	unsigned long	tags[RADIX_TREE_MAX_TAGS][RADIX_TREE_TAG_LONGS];
-};
-
-struct radix_tree_path {
-	struct radix_tree_node *node;
-	int offset;
-};
-
-#define RADIX_TREE_INDEX_BITS  (8 /* CHAR_BIT */ * sizeof(unsigned long))
-#define RADIX_TREE_MAX_PATH (RADIX_TREE_INDEX_BITS/RADIX_TREE_MAP_SHIFT + 2)
-
-static unsigned long height_to_maxindex[RADIX_TREE_MAX_PATH] __read_mostly;
-
-/*
- * Per-cpu pool of preloaded nodes
- */
-struct radix_tree_preload {
-	int nr;
-	struct radix_tree_node *nodes[RADIX_TREE_MAX_PATH];
-};
-static struct radix_tree_preload radix_tree_preloads = { 0, };
-
-static int internal_nodes = 0;
-/*
- * This assumes that the caller has performed appropriate preallocation, and
- * that the caller has pinned this thread of control to the current CPU.
- */
-static struct radix_tree_node *
-radix_tree_node_alloc(struct radix_tree_root *root)
-{
-	struct radix_tree_node *ret;
-	ret = malloc(sizeof(struct radix_tree_node));
-	if (ret) {
-		memset(ret, 0, sizeof(struct radix_tree_node));
-		internal_nodes++;
-	}
-	return ret;
-}
-
-static inline void
-radix_tree_node_free(struct radix_tree_node *node)
-{
-	internal_nodes--;
-	free(node);
-}
-
-/*
- * Load up this CPU's radix_tree_node buffer with sufficient objects to
- * ensure that the addition of a single element in the tree cannot fail.  On
- * success, return zero, with preemption disabled.  On error, return -ENOMEM
- * with preemption not disabled.
- */
-int radix_tree_preload(gfp_t gfp_mask)
-{
-	struct radix_tree_preload *rtp;
-	struct radix_tree_node *node;
-	int ret = -ENOMEM;
-
-	preempt_disable();
-	rtp = &__get_cpu_var(radix_tree_preloads);
-	while (rtp->nr < ARRAY_SIZE(rtp->nodes)) {
-		preempt_enable();
-		node = radix_tree_node_alloc(NULL);
-		if (node == NULL)
-			goto out;
-		preempt_disable();
-		rtp = &__get_cpu_var(radix_tree_preloads);
-		if (rtp->nr < ARRAY_SIZE(rtp->nodes))
-			rtp->nodes[rtp->nr++] = node;
-		else
-			radix_tree_node_free(node);
-	}
-	ret = 0;
-out:
-	return ret;
-}
-
-static inline void tag_set(struct radix_tree_node *node, unsigned int tag,
-		int offset)
-{
-	__set_bit(offset, node->tags[tag]);
-}
-
-static inline void tag_clear(struct radix_tree_node *node, unsigned int tag,
-		int offset)
-{
-	__clear_bit(offset, node->tags[tag]);
-}
-
-static inline int tag_get(struct radix_tree_node *node, unsigned int tag,
-		int offset)
-{
-	return test_bit(offset, node->tags[tag]);
-}
-
-static inline void root_tag_set(struct radix_tree_root *root, unsigned int tag)
-{
-	root->gfp_mask |= (__force gfp_t)(1 << (tag + __GFP_BITS_SHIFT));
-}
-
-
-static inline void root_tag_clear(struct radix_tree_root *root, unsigned int tag)
-{
-	root->gfp_mask &= (__force gfp_t)~(1 << (tag + __GFP_BITS_SHIFT));
-}
-
-static inline void root_tag_clear_all(struct radix_tree_root *root)
-{
-	root->gfp_mask &= __GFP_BITS_MASK;
-}
-
-static inline int root_tag_get(struct radix_tree_root *root, unsigned int tag)
-{
-	return (__force unsigned)root->gfp_mask & (1 << (tag + __GFP_BITS_SHIFT));
-}
-
-/*
- * Returns 1 if any slot in the node has this tag set.
- * Otherwise returns 0.
- */
-static inline int any_tag_set(struct radix_tree_node *node, unsigned int tag)
-{
-	int idx;
-	for (idx = 0; idx < RADIX_TREE_TAG_LONGS; idx++) {
-		if (node->tags[tag][idx])
-			return 1;
-	}
-	return 0;
-}
-
-/*
- *	Return the maximum key which can be store into a
- *	radix tree with height HEIGHT.
- */
-static inline unsigned long radix_tree_maxindex(unsigned int height)
-{
-	return height_to_maxindex[height];
-}
-
-/*
- *	Extend a radix tree so it can store key @index.
- */
-static int radix_tree_extend(struct radix_tree_root *root, unsigned long index)
-{
-	struct radix_tree_node *node;
-	unsigned int height;
-	int tag;
-
-	/* Figure out what the height should be.  */
-	height = root->height + 1;
-	while (index > radix_tree_maxindex(height))
-		height++;
-
-	if (root->rnode == NULL) {
-		root->height = height;
-		goto out;
-	}
-
-	do {
-		if (!(node = radix_tree_node_alloc(root)))
-			return -ENOMEM;
-
-		/* Increase the height.  */
-		node->slots[0] = root->rnode;
-
-		/* Propagate the aggregated tag info into the new root */
-		for (tag = 0; tag < RADIX_TREE_MAX_TAGS; tag++) {
-			if (root_tag_get(root, tag))
-				tag_set(node, tag, 0);
-		}
-
-		node->count = 1;
-		root->rnode = node;
-		root->height++;
-	} while (height > root->height);
-out:
-	return 0;
-}
-
-/**
- *	radix_tree_insert    -    insert into a radix tree
- *	@root:		radix tree root
- *	@index:		index key
- *	@item:		item to insert
- *
- *	Insert an item into the radix tree at position @index.
- */
-int radix_tree_insert(struct radix_tree_root *root,
-			unsigned long index, void *item)
-{
-	struct radix_tree_node *node = NULL, *slot;
-	unsigned int height, shift;
-	int offset;
-	int error;
-
-	/* Make sure the tree is high enough.  */
-	if (index > radix_tree_maxindex(root->height)) {
-		error = radix_tree_extend(root, index);
-		if (error)
-			return error;
-	}
-
-	slot = root->rnode;
-	height = root->height;
-	shift = (height-1) * RADIX_TREE_MAP_SHIFT;
-
-	offset = 0;			/* uninitialised var warning */
-	while (height > 0) {
-		if (slot == NULL) {
-			/* Have to add a child node.  */
-			if (!(slot = radix_tree_node_alloc(root)))
-				return -ENOMEM;
-			if (node) {
-				node->slots[offset] = slot;
-				node->count++;
-			} else
-				root->rnode = slot;
-		}
-
-		/* Go a level down */
-		offset = (index >> shift) & RADIX_TREE_MAP_MASK;
-		node = slot;
-		slot = node->slots[offset];
-		shift -= RADIX_TREE_MAP_SHIFT;
-		height--;
-	}
-
-	if (slot != NULL)
-		return -EEXIST;
-
-	if (node) {
-		node->count++;
-		node->slots[offset] = item;
-		BUG_ON(tag_get(node, 0, offset));
-		BUG_ON(tag_get(node, 1, offset));
-	} else {
-		root->rnode = item;
-		BUG_ON(root_tag_get(root, 0));
-		BUG_ON(root_tag_get(root, 1));
-	}
-
-	return 0;
-}
-
-static inline void **__lookup_slot(struct radix_tree_root *root,
-				   unsigned long index)
-{
-	unsigned int height, shift;
-	struct radix_tree_node **slot;
-
-	height = root->height;
-
-	if (index > radix_tree_maxindex(height))
-		return NULL;
-
-	if (height == 0 && root->rnode)
-		return (void *)&root->rnode;
-
-	shift = (height-1) * RADIX_TREE_MAP_SHIFT;
-	slot = &root->rnode;
-
-	while (height > 0) {
-		if (*slot == NULL)
-			return NULL;
-
-		slot = (struct radix_tree_node **)
-			((*slot)->slots +
-				((index >> shift) & RADIX_TREE_MAP_MASK));
-		shift -= RADIX_TREE_MAP_SHIFT;
-		height--;
-	}
-
-	return (void **)slot;
-}
-
-/**
- *	radix_tree_lookup_slot    -    lookup a slot in a radix tree
- *	@root:		radix tree root
- *	@index:		index key
- *
- *	Lookup the slot corresponding to the position @index in the radix tree
- *	@root. This is useful for update-if-exists operations.
- */
-void **radix_tree_lookup_slot(struct radix_tree_root *root, unsigned long index)
-{
-	return __lookup_slot(root, index);
-}
-
-/**
- *	radix_tree_lookup    -    perform lookup operation on a radix tree
- *	@root:		radix tree root
- *	@index:		index key
- *
- *	Lookup the item at the position @index in the radix tree @root.
- */
-void *radix_tree_lookup(struct radix_tree_root *root, unsigned long index)
-{
-	void **slot;
-
-	slot = __lookup_slot(root, index);
-	return slot != NULL ? *slot : NULL;
-}
-
-/**
- *	radix_tree_tag_set - set a tag on a radix tree node
- *	@root:		radix tree root
- *	@index:		index key
- *	@tag: 		tag index
- *
- *	Set the search tag (which must be < RADIX_TREE_MAX_TAGS)
- *	corresponding to @index in the radix tree.  From
- *	the root all the way down to the leaf node.
- *
- *	Returns the address of the tagged item.   Setting a tag on a not-present
- *	item is a bug.
- */
-void *radix_tree_tag_set(struct radix_tree_root *root,
-			unsigned long index, unsigned int tag)
-{
-	unsigned int height, shift;
-	struct radix_tree_node *slot;
-
-	height = root->height;
-	BUG_ON(index > radix_tree_maxindex(height));
-
-	slot = root->rnode;
-	shift = (height - 1) * RADIX_TREE_MAP_SHIFT;
-
-	while (height > 0) {
-		int offset;
-
-		offset = (index >> shift) & RADIX_TREE_MAP_MASK;
-		if (!tag_get(slot, tag, offset))
-			tag_set(slot, tag, offset);
-		slot = slot->slots[offset];
-		BUG_ON(slot == NULL);
-		shift -= RADIX_TREE_MAP_SHIFT;
-		height--;
-	}
-
-	/* set the root's tag bit */
-	if (slot && !root_tag_get(root, tag))
-		root_tag_set(root, tag);
-
-	return slot;
-}
-
-/**
- *	radix_tree_tag_clear - clear a tag on a radix tree node
- *	@root:		radix tree root
- *	@index:		index key
- *	@tag: 		tag index
- *
- *	Clear the search tag (which must be < RADIX_TREE_MAX_TAGS)
- *	corresponding to @index in the radix tree.  If
- *	this causes the leaf node to have no tags set then clear the tag in the
- *	next-to-leaf node, etc.
- *
- *	Returns the address of the tagged item on success, else NULL.  ie:
- *	has the same return value and semantics as radix_tree_lookup().
- */
-void *radix_tree_tag_clear(struct radix_tree_root *root,
-			unsigned long index, unsigned int tag)
-{
-	struct radix_tree_path path[RADIX_TREE_MAX_PATH], *pathp = path;
-	struct radix_tree_node *slot = NULL;
-	unsigned int height, shift;
-
-	height = root->height;
-	if (index > radix_tree_maxindex(height))
-		goto out;
-
-	shift = (height - 1) * RADIX_TREE_MAP_SHIFT;
-	pathp->node = NULL;
-	slot = root->rnode;
-
-	while (height > 0) {
-		int offset;
-
-		if (slot == NULL)
-			goto out;
-
-		offset = (index >> shift) & RADIX_TREE_MAP_MASK;
-		pathp[1].offset = offset;
-		pathp[1].node = slot;
-		slot = slot->slots[offset];
-		pathp++;
-		shift -= RADIX_TREE_MAP_SHIFT;
-		height--;
-	}
-
-	if (slot == NULL)
-		goto out;
-
-	while (pathp->node) {
-		if (!tag_get(pathp->node, tag, pathp->offset))
-			goto out;
-		tag_clear(pathp->node, tag, pathp->offset);
-		if (any_tag_set(pathp->node, tag))
-			goto out;
-		pathp--;
-	}
-
-	/* clear the root's tag bit */
-	if (root_tag_get(root, tag))
-		root_tag_clear(root, tag);
-
-out:
-	return slot;
-}
-
-#ifndef __KERNEL__	/* Only the test harness uses this at present */
-/**
- * radix_tree_tag_get - get a tag on a radix tree node
- * @root:		radix tree root
- * @index:		index key
- * @tag: 		tag index (< RADIX_TREE_MAX_TAGS)
- *
- * Return values:
- *
- *  0: tag not present or not set
- *  1: tag set
- */
-int radix_tree_tag_get(struct radix_tree_root *root,
-			unsigned long index, unsigned int tag)
-{
-	unsigned int height, shift;
-	struct radix_tree_node *slot;
-	int saw_unset_tag = 0;
-
-	height = root->height;
-	if (index > radix_tree_maxindex(height))
-		return 0;
-
-	/* check the root's tag bit */
-	if (!root_tag_get(root, tag))
-		return 0;
-
-	if (height == 0)
-		return 1;
-
-	shift = (height - 1) * RADIX_TREE_MAP_SHIFT;
-	slot = root->rnode;
-
-	for ( ; ; ) {
-		int offset;
-
-		if (slot == NULL)
-			return 0;
-
-		offset = (index >> shift) & RADIX_TREE_MAP_MASK;
-
-		/*
-		 * This is just a debug check.  Later, we can bale as soon as
-		 * we see an unset tag.
-		 */
-		if (!tag_get(slot, tag, offset))
-			saw_unset_tag = 1;
-		if (height == 1) {
-			int ret = tag_get(slot, tag, offset);
-
-			BUG_ON(ret && saw_unset_tag);
-			return !!ret;
-		}
-		slot = slot->slots[offset];
-		shift -= RADIX_TREE_MAP_SHIFT;
-		height--;
-	}
-}
-#endif
-
-static unsigned int
-__lookup(struct radix_tree_root *root, void **results, unsigned long index,
-	unsigned int max_items, unsigned long *next_index)
-{
-	unsigned int nr_found = 0;
-	unsigned int shift, height;
-	struct radix_tree_node *slot;
-	unsigned long i;
-
-	height = root->height;
-	if (height == 0) {
-		if (root->rnode && index == 0)
-			results[nr_found++] = root->rnode;
-		goto out;
-	}
-
-	shift = (height-1) * RADIX_TREE_MAP_SHIFT;
-	slot = root->rnode;
-
-	for ( ; height > 1; height--) {
-
-		for (i = (index >> shift) & RADIX_TREE_MAP_MASK ;
-				i < RADIX_TREE_MAP_SIZE; i++) {
-			if (slot->slots[i] != NULL)
-				break;
-			index &= ~((1UL << shift) - 1);
-			index += 1UL << shift;
-			if (index == 0)
-				goto out;	/* 32-bit wraparound */
-		}
-		if (i == RADIX_TREE_MAP_SIZE)
-			goto out;
-
-		shift -= RADIX_TREE_MAP_SHIFT;
-		slot = slot->slots[i];
-	}
-
-	/* Bottom level: grab some items */
-	for (i = index & RADIX_TREE_MAP_MASK; i < RADIX_TREE_MAP_SIZE; i++) {
-		index++;
-		if (slot->slots[i]) {
-			results[nr_found++] = slot->slots[i];
-			if (nr_found == max_items)
-				goto out;
-		}
-	}
-out:
-	*next_index = index;
-	return nr_found;
-}
-
-/**
- *	radix_tree_gang_lookup - perform multiple lookup on a radix tree
- *	@root:		radix tree root
- *	@results:	where the results of the lookup are placed
- *	@first_index:	start the lookup from this key
- *	@max_items:	place up to this many items at *results
- *
- *	Performs an index-ascending scan of the tree for present items.  Places
- *	them at *@results and returns the number of items which were placed at
- *	*@results.
- *
- *	The implementation is naive.
- */
-unsigned int
-radix_tree_gang_lookup(struct radix_tree_root *root, void **results,
-			unsigned long first_index, unsigned int max_items)
-{
-	const unsigned long max_index = radix_tree_maxindex(root->height);
-	unsigned long cur_index = first_index;
-	unsigned int ret = 0;
-
-	while (ret < max_items) {
-		unsigned int nr_found;
-		unsigned long next_index;	/* Index of next search */
-
-		if (cur_index > max_index)
-			break;
-		nr_found = __lookup(root, results + ret, cur_index,
-					max_items - ret, &next_index);
-		ret += nr_found;
-		if (next_index == 0)
-			break;
-		cur_index = next_index;
-	}
-	return ret;
-}
-
-/*
- * FIXME: the two tag_get()s here should use find_next_bit() instead of
- * open-coding the search.
- */
-static unsigned int
-__lookup_tag(struct radix_tree_root *root, void **results, unsigned long index,
-	unsigned int max_items, unsigned long *next_index, unsigned int tag)
-{
-	unsigned int nr_found = 0;
-	unsigned int shift;
-	unsigned int height = root->height;
-	struct radix_tree_node *slot;
-
-	if (height == 0) {
-		if (root->rnode && index == 0)
-			results[nr_found++] = root->rnode;
-		goto out;
-	}
-
-	shift = (height - 1) * RADIX_TREE_MAP_SHIFT;
-	slot = root->rnode;
-
-	do {
-		unsigned long i = (index >> shift) & RADIX_TREE_MAP_MASK;
-
-		for ( ; i < RADIX_TREE_MAP_SIZE; i++) {
-			if (tag_get(slot, tag, i)) {
-				BUG_ON(slot->slots[i] == NULL);
-				break;
-			}
-			index &= ~((1UL << shift) - 1);
-			index += 1UL << shift;
-			if (index == 0)
-				goto out;	/* 32-bit wraparound */
-		}
-		if (i == RADIX_TREE_MAP_SIZE)
-			goto out;
-		height--;
-		if (height == 0) {	/* Bottom level: grab some items */
-			unsigned long j = index & RADIX_TREE_MAP_MASK;
-
-			for ( ; j < RADIX_TREE_MAP_SIZE; j++) {
-				index++;
-				if (tag_get(slot, tag, j)) {
-					BUG_ON(slot->slots[j] == NULL);
-					results[nr_found++] = slot->slots[j];
-					if (nr_found == max_items)
-						goto out;
-				}
-			}
-		}
-		shift -= RADIX_TREE_MAP_SHIFT;
-		slot = slot->slots[i];
-	} while (height > 0);
-out:
-	*next_index = index;
-	return nr_found;
-}
-
-/**
- *	radix_tree_gang_lookup_tag - perform multiple lookup on a radix tree
- *	                             based on a tag
- *	@root:		radix tree root
- *	@results:	where the results of the lookup are placed
- *	@first_index:	start the lookup from this key
- *	@max_items:	place up to this many items at *results
- *	@tag:		the tag index (< RADIX_TREE_MAX_TAGS)
- *
- *	Performs an index-ascending scan of the tree for present items which
- *	have the tag indexed by @tag set.  Places the items at *@results and
- *	returns the number of items which were placed at *@results.
- */
-unsigned int
-radix_tree_gang_lookup_tag(struct radix_tree_root *root, void **results,
-		unsigned long first_index, unsigned int max_items,
-		unsigned int tag)
-{
-	const unsigned long max_index = radix_tree_maxindex(root->height);
-	unsigned long cur_index = first_index;
-	unsigned int ret = 0;
-
-	/* check the root's tag bit */
-	if (!root_tag_get(root, tag))
-		return 0;
-
-	while (ret < max_items) {
-		unsigned int nr_found;
-		unsigned long next_index;	/* Index of next search */
-
-		if (cur_index > max_index)
-			break;
-		nr_found = __lookup_tag(root, results + ret, cur_index,
-					max_items - ret, &next_index, tag);
-		ret += nr_found;
-		if (next_index == 0)
-			break;
-		cur_index = next_index;
-	}
-	return ret;
-}
-
-/**
- *	radix_tree_shrink    -    shrink height of a radix tree to minimal
- *	@root		radix tree root
- */
-static inline void radix_tree_shrink(struct radix_tree_root *root)
-{
-	/* try to shrink tree height */
-	while (root->height > 0 &&
-			root->rnode->count == 1 &&
-			root->rnode->slots[0]) {
-		struct radix_tree_node *to_free = root->rnode;
-
-		root->rnode = to_free->slots[0];
-		root->height--;
-		/* must only free zeroed nodes into the slab */
-		tag_clear(to_free, 0, 0);
-		tag_clear(to_free, 1, 0);
-		to_free->slots[0] = NULL;
-		to_free->count = 0;
-		radix_tree_node_free(to_free);
-	}
-}
-
-/**
- *	radix_tree_delete    -    delete an item from a radix tree
- *	@root:		radix tree root
- *	@index:		index key
- *
- *	Remove the item at @index from the radix tree rooted at @root.
- *
- *	Returns the address of the deleted item, or NULL if it was not present.
- */
-void *radix_tree_delete(struct radix_tree_root *root, unsigned long index)
-{
-	struct radix_tree_path path[RADIX_TREE_MAX_PATH], *pathp = path;
-	struct radix_tree_node *slot = NULL;
-	unsigned int height, shift;
-	int tag;
-	int offset;
-
-	height = root->height;
-	if (index > radix_tree_maxindex(height))
-		goto out;
-
-	slot = root->rnode;
-	if (height == 0 && root->rnode) {
-		root_tag_clear_all(root);
-		root->rnode = NULL;
-		goto out;
-	}
-
-	shift = (height - 1) * RADIX_TREE_MAP_SHIFT;
-	pathp->node = NULL;
-
-	do {
-		if (slot == NULL)
-			goto out;
-
-		pathp++;
-		offset = (index >> shift) & RADIX_TREE_MAP_MASK;
-		pathp->offset = offset;
-		pathp->node = slot;
-		slot = slot->slots[offset];
-		shift -= RADIX_TREE_MAP_SHIFT;
-		height--;
-	} while (height > 0);
-
-	if (slot == NULL)
-		goto out;
-
-	/*
-	 * Clear all tags associated with the just-deleted item
-	 */
-	for (tag = 0; tag < RADIX_TREE_MAX_TAGS; tag++) {
-		if (tag_get(pathp->node, tag, pathp->offset))
-			radix_tree_tag_clear(root, index, tag);
-	}
-
-	/* Now free the nodes we do not need anymore */
-	while (pathp->node) {
-		pathp->node->slots[pathp->offset] = NULL;
-		pathp->node->count--;
-
-		if (pathp->node->count) {
-			if (pathp->node == root->rnode)
-				radix_tree_shrink(root);
-			goto out;
-		}
-
-		/* Node with zero slots in use so free it */
-		radix_tree_node_free(pathp->node);
-
-		pathp--;
-	}
-	root_tag_clear_all(root);
-	root->height = 0;
-	root->rnode = NULL;
-
-out:
-	return slot;
-}
-
-/**
- *	radix_tree_tagged - test whether any items in the tree are tagged
- *	@root:		radix tree root
- *	@tag:		tag to test
- */
-int radix_tree_tagged(struct radix_tree_root *root, unsigned int tag)
-{
-	return root_tag_get(root, tag);
-}
-
-static unsigned long __maxindex(unsigned int height)
-{
-	unsigned int tmp = height * RADIX_TREE_MAP_SHIFT;
-	unsigned long index = ~0UL;
-
-	if (tmp < RADIX_TREE_INDEX_BITS)
-		index = (index >> (RADIX_TREE_INDEX_BITS - tmp - 1)) >> 1;
-	return index;
-}
-
-static void radix_tree_init_maxindex(void)
-{
-	unsigned int i;
-
-	for (i = 0; i < ARRAY_SIZE(height_to_maxindex); i++)
-		height_to_maxindex[i] = __maxindex(i);
-}
-
-void radix_tree_init(void)
-{
-	radix_tree_init_maxindex();
-}