radix tree tests: Move item_insert_order

The remaining tests are not suitable for moving in-kernel, so move
item_insert_order() into multiorder.c, make it static and make it use
the XArray.

Signed-off-by: Matthew Wilcox <willy@infradead.org>

tools/testing/radix-tree/multiorder.c

@@ -20,6 +20,25 @@
 
 #include "test.h"
 
+static int item_insert_order(struct xarray *xa, unsigned long index,
+			unsigned order)
+{
+	XA_STATE_ORDER(xas, xa, index, order);
+	struct item *item = item_create(index, order);
+
+	do {
+		xas_lock(&xas);
+		xas_store(&xas, item);
+		xas_unlock(&xas);
+	} while (xas_nomem(&xas, GFP_KERNEL));
+
+	if (!xas_error(&xas))
+		return 0;
+
+	free(item);
+	return xas_error(&xas);
+}
+
 void multiorder_iteration(void)
 {
 	RADIX_TREE(tree, GFP_KERNEL);

tools/testing/radix-tree/test.c

@@ -34,21 +34,15 @@ struct item *item_create(unsigned long index, unsigned int order)
 	return ret;
 }
 
-int item_insert_order(struct radix_tree_root *root, unsigned long index,
-			unsigned order)
+int item_insert(struct radix_tree_root *root, unsigned long index)
 {
-	struct item *item = item_create(index, order);
-	int err = __radix_tree_insert(root, item->index, item->order, item);
+	struct item *item = item_create(index, 0);
+	int err = radix_tree_insert(root, item->index, item);
 	if (err)
 		free(item);
 	return err;
 }
 
-int item_insert(struct radix_tree_root *root, unsigned long index)
-{
-	return item_insert_order(root, index, 0);
-}
-
 void item_sanity(struct item *item, unsigned long index)
 {
 	unsigned long mask;

tools/testing/radix-tree/test.h

@@ -14,8 +14,6 @@ struct item *item_create(unsigned long index, unsigned int order);
 int item_insert(struct radix_tree_root *root, unsigned long index);
 void item_sanity(struct item *item, unsigned long index);
 void item_free(struct item *item, unsigned long index);
-int item_insert_order(struct radix_tree_root *root, unsigned long index,
-			unsigned order);
 int item_delete(struct radix_tree_root *root, unsigned long index);
 int item_delete_rcu(struct radix_tree_root *root, unsigned long index);
 struct item *item_lookup(struct radix_tree_root *root, unsigned long index);