[PATCH 2/3] maple_tree: not possible to be a root node after loop

[Wei Yang]

Empty tree and single entry tree is handled else whether, so the maple
tree here must be a tree with nodes.

If the height is 1 and we found the gap, it will jump to *done* since it
is also a leaf.
If the height is more than one, and there may be an available range, we
will descend the tree, which is not root anymore.

If there is no available range, we will set error and return.

This means the check for root node here is not necessary.

Signed-off-by: Wei Yang <richard.weiyang at gmail.com>
CC: Liam R. Howlett <Liam.Howlett at Oracle.com>
CC: Lorenzo Stoakes <lorenzo.stoakes at oracle.com>
CC: Sidhartha Kumar <sidhartha.kumar at oracle.com>
---
 lib/maple_tree.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 63dccd7b9474..ab235d0194f7 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -4891,7 +4891,7 @@ static inline bool mas_anode_descend(struct ma_state *mas, unsigned long size)
 		if (gap >= size) {
 			if (ma_is_leaf(type)) {
 				found = true;
-				goto done;
+				break;
 			}
 
 			mas->node = mas_slot(mas, slots, offset);
@@ -4908,9 +4908,6 @@ static inline bool mas_anode_descend(struct ma_state *mas, unsigned long size)
 		}
 	}
 
-	if (mte_is_root(mas->node))
-		found = true;
-done:
 	mas->offset = offset;
 	return found;
 }
-- 
2.34.1