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Date: Mon, 11 Jun 2018 07:06:36 -0700
From: Matthew Wilcox <willy@...radead.org>
To: linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Matthew Wilcox <mawilcox@...rosoft.com>, Jan Kara <jack@...e.cz>,
Jeff Layton <jlayton@...hat.com>,
Lukas Czerner <lczerner@...hat.com>,
Ross Zwisler <ross.zwisler@...ux.intel.com>,
Christoph Hellwig <hch@....de>,
Goldwyn Rodrigues <rgoldwyn@...e.com>,
Nicholas Piggin <npiggin@...il.com>,
Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>,
linux-nilfs@...r.kernel.org, Jaegeuk Kim <jaegeuk@...nel.org>,
Chao Yu <yuchao0@...wei.com>,
linux-f2fs-devel@...ts.sourceforge.net
Subject: [PATCH v13 69/72] radix tree: Remove radix_tree_update_node_t
From: Matthew Wilcox <mawilcox@...rosoft.com>
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 <mawilcox@...rosoft.com>
---
include/linux/radix-tree.h | 7 +----
lib/idr.c | 2 +-
lib/radix-tree.c | 42 +++++----------------------
tools/testing/radix-tree/multiorder.c | 2 +-
4 files changed, 11 insertions(+), 42 deletions(-)
diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index 081e68b4376b..fc13c4b1afdb 100644
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -242,17 +242,12 @@ void *__radix_tree_lookup(const struct radix_tree_root *, unsigned long index,
void *radix_tree_lookup(const struct radix_tree_root *, unsigned long);
void __rcu **radix_tree_lookup_slot(const struct radix_tree_root *,
unsigned long index);
-typedef void (*radix_tree_update_node_t)(struct radix_tree_node *);
void __radix_tree_replace(struct radix_tree_root *, struct radix_tree_node *,
- void __rcu **slot, void *entry,
- radix_tree_update_node_t update_node);
+ void __rcu **slot, void *entry);
void radix_tree_iter_replace(struct radix_tree_root *,
const struct radix_tree_iter *, void __rcu **slot, void *entry);
void radix_tree_replace_slot(struct radix_tree_root *,
void __rcu **slot, void *entry);
-void __radix_tree_delete_node(struct radix_tree_root *,
- struct radix_tree_node *,
- radix_tree_update_node_t update_node);
void radix_tree_iter_delete(struct radix_tree_root *,
struct radix_tree_iter *iter, void __rcu **slot);
void *radix_tree_delete_item(struct radix_tree_root *, unsigned long, void *);
diff --git a/lib/idr.c b/lib/idr.c
index 0d7410d1fb7c..58b88f5eb672 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -303,7 +303,7 @@ 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 d0f44ea96945..001062d41f9f 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -610,8 +610,7 @@ static int radix_tree_extend(struct radix_tree_root *root, gfp_t gfp,
* 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;
@@ -671,8 +670,6 @@ 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));
@@ -684,8 +681,7 @@ 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;
@@ -695,7 +691,7 @@ 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;
}
@@ -1100,15 +1096,13 @@ 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);
@@ -1126,10 +1120,7 @@ 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);
}
/**
@@ -1151,7 +1142,7 @@ 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);
@@ -1168,7 +1159,7 @@ 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
@@ -1848,23 +1839,6 @@ 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)
{
@@ -1880,7 +1854,7 @@ 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);
}
/**
diff --git a/tools/testing/radix-tree/multiorder.c b/tools/testing/radix-tree/multiorder.c
index c659056340df..fc7d0c4e812a 100644
--- a/tools/testing/radix-tree/multiorder.c
+++ b/tools/testing/radix-tree/multiorder.c
@@ -618,7 +618,7 @@ static void multiorder_account(void)
__radix_tree_insert(&tree, 1 << 5, 5, xa_mk_value(5));
__radix_tree_lookup(&tree, 1 << 5, &node, &slot);
assert(node->count == node->nr_values * 2);
- __radix_tree_replace(&tree, node, slot, NULL, NULL);
+ __radix_tree_replace(&tree, node, slot, NULL);
assert(node->nr_values == 0);
item_kill_tree(&tree);
--
2.17.1
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