radix-tree: remove restriction on multi-order entries

Now that sibling pointers are handled explicitly, there is no purpose
served by restricting the order to be >= RADIX_TREE_MAP_SHIFT.

Signed-off-by: Matthew Wilcox <[email protected]>
Reviewed-by: Ross Zwisler <[email protected]>
Cc: Konstantin Khlebnikov <[email protected]>
Cc: Kirill Shutemov <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Neil Brown <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index b3364b9ecc839208c2226ddd3e32b950c40ea035..6900f7b67c4909515be475c0d6b5ea5a3c1c30f9 100644 (file)
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -483,8 +483,6 @@ int __radix_tree_create(struct radix_tree_root *root, unsigned long index,
        unsigned int height, shift, offset;
        int error;
 
-       BUG_ON((0 < order) && (order < RADIX_TREE_MAP_SHIFT));
-
        /* Make sure the tree is high enough.  */
        if (index > radix_tree_maxindex(root->height)) {
                error = radix_tree_extend(root, index, order);