summaryrefslogtreecommitdiffstats
path: root/lib
diff options
context:
space:
mode:
authorMatthew Wilcox <mawilcox@microsoft.com>2017-01-28 09:55:20 -0500
committerMatthew Wilcox <mawilcox@microsoft.com>2017-02-13 16:09:44 -0500
commit30b888ba950d9f77326b50a4aa2d7d99557d5718 (patch)
tree18ca4db821dc2da1ccb2c851ca5a7347a49da1f4 /lib
parentbfa11193c46d5ea8ef4d9a4f1c10221cdd985ab1 (diff)
downloadlinux-30b888ba950d9f77326b50a4aa2d7d99557d5718.tar.gz
linux-30b888ba950d9f77326b50a4aa2d7d99557d5718.tar.xz
radix-tree: Add radix_tree_iter_tag_clear()
The counterpart to radix_tree_iter_tag_set(), used by the IDR code Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Reviewed-by: Rehas Sachdeva <aquannie@gmail.com>
Diffstat (limited to 'lib')
-rw-r--r--lib/radix-tree.c68
1 files changed, 40 insertions, 28 deletions
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 6f86fbac0e36..40f3091c5a6b 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -1266,6 +1266,22 @@ int radix_tree_split(struct radix_tree_root *root, unsigned long index,
}
#endif
+static void node_tag_set(struct radix_tree_root *root,
+ struct radix_tree_node *node,
+ unsigned int tag, unsigned int offset)
+{
+ while (node) {
+ if (tag_get(node, tag, offset))
+ return;
+ tag_set(node, tag, offset);
+ offset = node->offset;
+ node = node->parent;
+ }
+
+ if (!root_tag_get(root, tag))
+ root_tag_set(root, tag);
+}
+
/**
* radix_tree_tag_set - set a tag on a radix tree node
* @root: radix tree root
@@ -1307,6 +1323,18 @@ void *radix_tree_tag_set(struct radix_tree_root *root,
}
EXPORT_SYMBOL(radix_tree_tag_set);
+/**
+ * radix_tree_iter_tag_set - set a tag on the current iterator entry
+ * @root: radix tree root
+ * @iter: iterator state
+ * @tag: tag to set
+ */
+void radix_tree_iter_tag_set(struct radix_tree_root *root,
+ const struct radix_tree_iter *iter, unsigned int tag)
+{
+ node_tag_set(root, iter->node, tag, iter_offset(iter));
+}
+
static void node_tag_clear(struct radix_tree_root *root,
struct radix_tree_node *node,
unsigned int tag, unsigned int offset)
@@ -1327,34 +1355,6 @@ static void node_tag_clear(struct radix_tree_root *root,
root_tag_clear(root, tag);
}
-static void node_tag_set(struct radix_tree_root *root,
- struct radix_tree_node *node,
- unsigned int tag, unsigned int offset)
-{
- while (node) {
- if (tag_get(node, tag, offset))
- return;
- tag_set(node, tag, offset);
- offset = node->offset;
- node = node->parent;
- }
-
- if (!root_tag_get(root, tag))
- root_tag_set(root, tag);
-}
-
-/**
- * radix_tree_iter_tag_set - set a tag on the current iterator entry
- * @root: radix tree root
- * @iter: iterator state
- * @tag: tag to set
- */
-void radix_tree_iter_tag_set(struct radix_tree_root *root,
- const struct radix_tree_iter *iter, unsigned int tag)
-{
- node_tag_set(root, iter->node, tag, iter_offset(iter));
-}
-
/**
* radix_tree_tag_clear - clear a tag on a radix tree node
* @root: radix tree root
@@ -1395,6 +1395,18 @@ void *radix_tree_tag_clear(struct radix_tree_root *root,
EXPORT_SYMBOL(radix_tree_tag_clear);
/**
+ * radix_tree_iter_tag_clear - clear a tag on the current iterator entry
+ * @root: radix tree root
+ * @iter: iterator state
+ * @tag: tag to clear
+ */
+void radix_tree_iter_tag_clear(struct radix_tree_root *root,
+ const struct radix_tree_iter *iter, unsigned int tag)
+{
+ node_tag_clear(root, iter->node, tag, iter_offset(iter));
+}
+
+/**
* radix_tree_tag_get - get a tag on a radix tree node
* @root: radix tree root
* @index: index key