5 files changed, 76 insertions, 5 deletions

diff --git a/tools/testing/radix-tree/Makefile b/tools/testing/radix-tree/Makefile
index 43febba864bd..3b530467148e 100644
--- a/tools/testing/radix-tree/Makefile
+++ b/tools/testing/radix-tree/Makefile
@@ -3,7 +3,7 @@ CFLAGS += -I. -g -Wall -D_LGPL_SOURCE
 LDFLAGS += -lpthread -lurcu
 TARGETS = main
 OFILES = main.o radix-tree.o linux.o test.o tag_check.o find_next_bit.o \
-	 regression1.o regression2.o regression3.o
+	 regression1.o regression2.o regression3.o multiorder.o
 
 targets: $(TARGETS)
 
diff --git a/tools/testing/radix-tree/main.c b/tools/testing/radix-tree/main.c
index 122c8b9be17e..b6a700b00cce 100644
--- a/tools/testing/radix-tree/main.c
+++ b/tools/testing/radix-tree/main.c
@@ -275,6 +275,8 @@ static void single_thread_tests(bool long_run)
 	int i;
 
 	printf("starting single_thread_tests: %d allocated\n", nr_allocated);
+	multiorder_checks();
+	printf("after multiorder_check: %d allocated\n", nr_allocated);
 	locate_check();
 	printf("after locate_check: %d allocated\n", nr_allocated);
 	tag_check();
diff --git a/tools/testing/radix-tree/multiorder.c b/tools/testing/radix-tree/multiorder.c
new file mode 100644
index 000000000000..cfe718c78eb6
--- /dev/null
+++ b/tools/testing/radix-tree/multiorder.c
@@ -0,0 +1,58 @@
+/*
+ * multiorder.c: Multi-order radix tree entry testing
+ * Copyright (c) 2016 Intel Corporation
+ * Author: Ross Zwisler <ross.zwisler@linux.intel.com>
+ * Author: Matthew Wilcox <matthew.r.wilcox@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+#include <linux/radix-tree.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+
+#include "test.h"
+
+static void multiorder_check(unsigned long index, int order)
+{
+	unsigned long i;
+	unsigned long min = index & ~((1UL << order) - 1);
+	unsigned long max = min + (1UL << order);
+	RADIX_TREE(tree, GFP_KERNEL);
+
+	printf("Multiorder index %ld, order %d\n", index, order);
+
+	assert(item_insert_order(&tree, index, order) == 0);
+
+	for (i = min; i < max; i++) {
+		struct item *item = item_lookup(&tree, i);
+		assert(item != 0);
+		assert(item->index == index);
+	}
+	for (i = 0; i < min; i++)
+		item_check_absent(&tree, i);
+	for (i = max; i < 2*max; i++)
+		item_check_absent(&tree, i);
+
+	assert(item_delete(&tree, index) != 0);
+
+	for (i = 0; i < 2*max; i++)
+		item_check_absent(&tree, i);
+}
+
+void multiorder_checks(void)
+{
+	int i;
+
+	for (i = 0; i < 20; i++) {
+		multiorder_check(200, i);
+		multiorder_check(0, i);
+		multiorder_check((1UL << i) + 1, i);
+	}
+}
diff --git a/tools/testing/radix-tree/test.c b/tools/testing/radix-tree/test.c
index 2bebf34cdc27..da54f11e8ba7 100644
--- a/tools/testing/radix-tree/test.c
+++ b/tools/testing/radix-tree/test.c
@@ -24,14 +24,21 @@ int item_tag_get(struct radix_tree_root *root, unsigned long index, int tag)
 	return radix_tree_tag_get(root, index, tag);
 }
 
-int __item_insert(struct radix_tree_root *root, struct item *item)
+int __item_insert(struct radix_tree_root *root, struct item *item,
+			unsigned order)
 {
-	return radix_tree_insert(root, item->index, item);
+	return __radix_tree_insert(root, item->index, order, item);
 }
 
 int item_insert(struct radix_tree_root *root, unsigned long index)
 {
-	return __item_insert(root, item_create(index));
+	return __item_insert(root, item_create(index), 0);
+}
+
+int item_insert_order(struct radix_tree_root *root, unsigned long index,
+			unsigned order)
+{
+	return __item_insert(root, item_create(index), order);
 }
 
 int item_delete(struct radix_tree_root *root, unsigned long index)
diff --git a/tools/testing/radix-tree/test.h b/tools/testing/radix-tree/test.h
index 4e1d95faaa94..53cb595db44a 100644
--- a/tools/testing/radix-tree/test.h
+++ b/tools/testing/radix-tree/test.h
@@ -8,8 +8,11 @@ struct item {
 };
 
 struct item *item_create(unsigned long index);
-int __item_insert(struct radix_tree_root *root, struct item *item);
+int __item_insert(struct radix_tree_root *root, struct item *item,
+			unsigned order);
 int item_insert(struct radix_tree_root *root, 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);
 struct item *item_lookup(struct radix_tree_root *root, unsigned long index);
 
@@ -23,6 +26,7 @@ void item_full_scan(struct radix_tree_root *root, unsigned long start,
 void item_kill_tree(struct radix_tree_root *root);
 
 void tag_check(void);
+void multiorder_checks(void);
 
 struct item *
 item_tag_set(struct radix_tree_root *root, unsigned long index, int tag);