[ARM] 4764/1: [AT91] AT91CAP9 core support

[linux-2.6-omap-h63xx.git] / lib / radix-tree.c

diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 6b26f9d3980079a8d889e8d57859ce9a7cbb89bd..48c250fe2233d82c6d8fd563e83c234cdf1109ee 100644 (file)
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -1042,19 +1042,21 @@ int radix_tree_tagged(struct radix_tree_root *root, unsigned int tag)
 EXPORT_SYMBOL(radix_tree_tagged);
 
 static void
-radix_tree_node_ctor(void *node, struct kmem_cache *cachep, unsigned long flags)
+radix_tree_node_ctor(struct kmem_cache *cachep, void *node)
 {
        memset(node, 0, sizeof(struct radix_tree_node));
 }
 
 static __init unsigned long __maxindex(unsigned int height)
 {
-       unsigned int tmp = height * RADIX_TREE_MAP_SHIFT;
-       unsigned long index = (~0UL >> (RADIX_TREE_INDEX_BITS - tmp - 1)) >> 1;
-
-       if (tmp >= RADIX_TREE_INDEX_BITS)
-               index = ~0UL;
-       return index;
+       unsigned int width = height * RADIX_TREE_MAP_SHIFT;
+       int shift = RADIX_TREE_INDEX_BITS - width;
+
+       if (shift < 0)
+               return ~0UL;
+       if (shift >= BITS_PER_LONG)
+               return 0UL;
+       return ~0UL >> shift;
 }
 
 static __init void radix_tree_init_maxindex(void)