[PATCH v4 01/10] maple_tree: Add mt_free_one() and mt_attr() helpers

[Peng Zhang]

Add two helpers:
1. mt_free_one(), used to free a maple node.
2. mt_attr(), used to obtain the attributes of maple tree.

Signed-off-by: Peng Zhang <zhangpeng.00@xxxxxxxxxxxxx>
---
 lib/maple_tree.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 0e00a84e8e8f..28d8959386e7 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -165,6 +165,11 @@ static inline int mt_alloc_bulk(gfp_t gfp, size_t size, void **nodes)
 	return kmem_cache_alloc_bulk(maple_node_cache, gfp, size, nodes);
 }
 
+static inline void mt_free_one(struct maple_node *node)
+{
+	kmem_cache_free(maple_node_cache, node);
+}
+
 static inline void mt_free_bulk(size_t size, void __rcu **nodes)
 {
 	kmem_cache_free_bulk(maple_node_cache, size, (void **)nodes);
@@ -205,6 +210,11 @@ static unsigned int mas_mt_height(struct ma_state *mas)
 	return mt_height(mas->tree);
 }
 
+static inline unsigned int mt_attr(struct maple_tree *mt)
+{
+	return mt->ma_flags & ~MT_FLAGS_HEIGHT_MASK;
+}
+
 static inline enum maple_type mte_node_type(const struct maple_enode *entry)
 {
 	return ((unsigned long)entry >> MAPLE_NODE_TYPE_SHIFT) &
@@ -5573,7 +5583,7 @@ void mas_destroy(struct ma_state *mas)
 			mt_free_bulk(count, (void __rcu **)&node->slot[1]);
 			total -= count;
 		}
-		kmem_cache_free(maple_node_cache, node);
+		mt_free_one(ma_mnode_ptr(node));
 		total--;
 	}
 
-- 
2.20.1