radix-tree: add radix_tree_join

[linux] / include / linux / radix-tree.h

diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index 7a8d251..935293a 100644 (file)
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -335,6 +335,9 @@ static inline void radix_tree_preload_end(void)
        preempt_enable();
 }
 
+int radix_tree_join(struct radix_tree_root *, unsigned long index,
+                       unsigned new_order, void *);
+
 #define RADIX_TREE_ITER_TAG_MASK       0x00FF  /* tag index in lower byte */
 #define RADIX_TREE_ITER_TAGGED         0x0100  /* lookup tagged slots */
 #define RADIX_TREE_ITER_CONTIG         0x0200  /* stop at first hole */