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authorMatthew Wilcox <willy@infradead.org>2018-04-09 16:24:45 -0400
committerMatthew Wilcox <willy@infradead.org>2018-10-21 10:46:44 -0400
commit1cf56f9d670b88b2e947a7ccdb8ba32e6477915d (patch)
tree3d16b4ccb8ed09ee7a61f0aa50481eccb54a5057 /lib
parenta28334862993b5c6a8766f6963ee69048403817c (diff)
downloadlinux-1cf56f9d670b88b2e947a7ccdb8ba32e6477915d.tar.gz
radix tree: Remove radix_tree_update_node_t
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>
Diffstat (limited to 'lib')
-rw-r--r--lib/idr.c2
-rw-r--r--lib/radix-tree.c42
2 files changed, 9 insertions, 35 deletions
diff --git a/lib/idr.c b/lib/idr.c
index 3c20ad9b0463..cb1db9b8d3f6 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -297,7 +297,7 @@ void *idr_replace(struct idr *idr, void *ptr, unsigned long id)
if (!slot || radix_tree_tag_get(&idr->idr_rt, id, IDR_FREE))
return ERR_PTR(-ENOENT);
- __radix_tree_replace(&idr->idr_rt, node, slot, ptr, NULL);
+ __radix_tree_replace(&idr->idr_rt, node, slot, ptr);
return entry;
}
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 2f9c0e45eeb7..c4c252185734 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -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);
}
/**