radix-tree.c:__lookup_slot() dead code removal

Frank van Maarseveen
2006-12-03T17:02:33Z

Most of the code suggests that it is valid to insert a NULL item,
possibly a zero item with pointer cast. However, in __lookup_slot()
whether or not the slot is found seems to depend on the actual value
of the item in one special case. But further on it doesn't make any
difference so to remove some dead code:

--- a/lib/radix-tree.c 2006-12-03 13:23:00.000000000 +0100
+++ b/lib/radix-tree.c 2006-12-03 17:57:03.000000000 +0100
@@ -319,9 +319,6 @@ static inline void **__lookup_slot(struc
if (index > radix_tree_maxindex(height))
return NULL;

- if (height == 0 && root->rnode)
- return (void **)&root->rnode;
-
shift = (height-1) * RADIX_TREE_MAP_SHIFT;
slot = &root->rnode;

--
Frank