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radix tree: Remove radix_tree_update_node_t

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The only user of this functionality was the workingset code, and it's
now been converted to the XArray.  Remove __radix_tree_delete_node()
entirely as it was also only used by the workingset code.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox
2018-04-09 16:24:45 -04:00
parent a283348629
commit 1cf56f9d67
4 changed files with 11 additions and 42 deletions
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42
lib/radix-tree.c
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@@ -562,8 +562,7 @@ out:
* radix_tree_shrink - shrink radix tree to minimum height
* @root radix tree root
*/
static inline bool radix_tree_shrink(struct radix_tree_root *root,
radix_tree_update_node_t update_node)
static inline bool radix_tree_shrink(struct radix_tree_root *root)
{
bool shrunk = false;
@@ -631,8 +630,6 @@ static inline bool radix_tree_shrink(struct radix_tree_root *root,
node->count = 0;
if (!radix_tree_is_internal_node(child)) {
node->slots[0] = (void __rcu *)RADIX_TREE_RETRY;
if (update_node)
update_node(node);
}
WARN_ON_ONCE(!list_empty(&node->private_list));
@@ -644,8 +641,7 @@ static inline bool radix_tree_shrink(struct radix_tree_root *root,
}
static bool delete_node(struct radix_tree_root *root,
struct radix_tree_node *node,
radix_tree_update_node_t update_node)
struct radix_tree_node *node)
{
bool deleted = false;
@@ -655,7 +651,7 @@ static bool delete_node(struct radix_tree_root *root,
if (node->count) {
if (node_to_entry(node) ==
rcu_dereference_raw(root->xa_head))
deleted |= radix_tree_shrink(root, update_node);
deleted |= radix_tree_shrink(root);
return deleted;
}
@@ -1059,15 +1055,13 @@ static int calculate_count(struct radix_tree_root *root,
* @node: pointer to tree node
* @slot: pointer to slot in @node
* @item: new item to store in the slot.
* @update_node: callback for changing leaf nodes
*
* For use with __radix_tree_lookup(). Caller must hold tree write locked
* across slot lookup and replacement.
*/
void __radix_tree_replace(struct radix_tree_root *root,
struct radix_tree_node *node,
void __rcu **slot, void *item,
radix_tree_update_node_t update_node)
void __rcu **slot, void *item)
{
void *old = rcu_dereference_raw(*slot);
int values = !!xa_is_value(item) - !!xa_is_value(old);
@@ -1085,10 +1079,7 @@ void __radix_tree_replace(struct radix_tree_root *root,
if (!node)
return;
if (update_node)
update_node(node);
delete_node(root, node, update_node);
delete_node(root, node);
}
/**
@@ -1110,7 +1101,7 @@ void __radix_tree_replace(struct radix_tree_root *root,
void radix_tree_replace_slot(struct radix_tree_root *root,
void __rcu **slot, void *item)
{
__radix_tree_replace(root, NULL, slot, item, NULL);
__radix_tree_replace(root, NULL, slot, item);
}
EXPORT_SYMBOL(radix_tree_replace_slot);
@@ -1127,7 +1118,7 @@ void radix_tree_iter_replace(struct radix_tree_root *root,
const struct radix_tree_iter *iter,
void __rcu **slot, void *item)
{
__radix_tree_replace(root, iter->node, slot, item, NULL);
__radix_tree_replace(root, iter->node, slot, item);
}
#ifdef CONFIG_RADIX_TREE_MULTIORDER
@@ -1807,23 +1798,6 @@ radix_tree_gang_lookup_tag_slot(const struct radix_tree_root *root,
}
EXPORT_SYMBOL(radix_tree_gang_lookup_tag_slot);
/**
* __radix_tree_delete_node - try to free node after clearing a slot
* @root: radix tree root
* @node: node containing @index
* @update_node: callback for changing leaf nodes
*
* After clearing the slot at @index in @node from radix tree
* rooted at @root, call this function to attempt freeing the
* node and shrinking the tree.
*/
void __radix_tree_delete_node(struct radix_tree_root *root,
struct radix_tree_node *node,
radix_tree_update_node_t update_node)
{
delete_node(root, node, update_node);
}
static bool __radix_tree_delete(struct radix_tree_root *root,
struct radix_tree_node *node, void __rcu **slot)
{
@@ -1839,7 +1813,7 @@ static bool __radix_tree_delete(struct radix_tree_root *root,
node_tag_clear(root, node, tag, offset);
replace_slot(slot, NULL, node, -1, values);
return node && delete_node(root, node, NULL);
return node && delete_node(root, node);
}
/**