radix-tree: rename radix_tree_is_indirect_ptr()

As with indirect_to_ptr(), ptr_to_indirect() and
RADIX_TREE_INDIRECT_PTR, change radix_tree_is_indirect_ptr() to
radix_tree_is_internal_node().

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com>
Cc: Jan Kara <jack@suse.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/tools/testing/radix-tree/test.c b/tools/testing/radix-tree/test.c
index 7b0bc1f..a6e8099 100644
--- a/tools/testing/radix-tree/test.c
+++ b/tools/testing/radix-tree/test.c
@@ -193,7 +193,7 @@
 void verify_tag_consistency(struct radix_tree_root *root, unsigned int tag)
 {
 	struct radix_tree_node *node = root->rnode;
-	if (!radix_tree_is_indirect_ptr(node))
+	if (!radix_tree_is_internal_node(node))
 		return;
 	verify_node(node, tag, !!root_tag_get(root, tag));
 }
@@ -222,7 +222,7 @@
 {
 	unsigned shift;
 	struct radix_tree_node *node = root->rnode;
-	if (!radix_tree_is_indirect_ptr(node)) {
+	if (!radix_tree_is_internal_node(node)) {
 		assert(maxindex == 0);
 		return;
 	}