maple_tree: Export mas_entry_cnt to setup external mas.

When the number of elements are know, this can pre-allocate the set
number.

diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h
index 3b3eec60dd3ee28d02a17ea974e85c0106cac5dc..fc16e6f1a219de93ff7c7aa1fbc2cb50e4c6539f 100644 (file)
--- a/include/linux/maple_tree.h
+++ b/include/linux/maple_tree.h
@@ -395,6 +395,8 @@ static inline void mt_set_in_rcu(struct maple_tree *mt)
        mtree_unlock(mt);
 }
 
+int mas_entry_cnt(struct ma_state *mas, unsigned long nr_leaves);
+
 void *mt_find(struct maple_tree *mt, unsigned long *index, unsigned long max);
 void *_mt_find(struct maple_tree *mt, unsigned long *index, unsigned long max,
                bool start);