mmc: s3c6410: enable ADMA feature in 6410 sdhci controller

[safe/jmp/linux-2.6] / lib / radix-tree.c

diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 0871582..2a087e0 100644 (file)
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -555,6 +555,10 @@ EXPORT_SYMBOL(radix_tree_tag_clear);
  *
  *  0: tag not present or not set
  *  1: tag set
+ *
+ * Note that the return value of this function may not be relied on, even if
+ * the RCU lock is held, unless tag modification and node deletion are excluded
+ * from concurrency.
  */
 int radix_tree_tag_get(struct radix_tree_root *root,
                        unsigned long index, unsigned int tag)
@@ -595,12 +599,8 @@ int radix_tree_tag_get(struct radix_tree_root *root,
                 */
                if (!tag_get(node, tag, offset))
                        saw_unset_tag = 1;
-               if (height == 1) {
-                       int ret = tag_get(node, tag, offset);
-
-                       BUG_ON(ret && saw_unset_tag);
-                       return !!ret;
-               }
+               if (height == 1)
+                       return !!tag_get(node, tag, offset);
                node = rcu_dereference_raw(node->slots[offset]);
                shift -= RADIX_TREE_MAP_SHIFT;
                height--;