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[v3,8/9] maple_tree: Preserve the tree attributes when destroying maple tree

Message ID 20230925035617.84767-9-zhangpeng.00@bytedance.com (mailing list archive)
State New
Headers show
Series Introduce __mt_dup() to improve the performance of fork() | expand

Commit Message

Peng Zhang Sept. 25, 2023, 3:56 a.m. UTC 
When destroying maple tree, preserve its attributes and then turn it
into an empty tree. This allows it to be reused without needing to be
reinitialized.

Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
---
 lib/maple_tree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index ed8847b4f1ff..ad06105f1a54 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -6670,7 +6670,7 @@  void __mt_destroy(struct maple_tree *mt)
 	if (xa_is_node(root))
 		mte_destroy_walk(root, mt);
 
-	mt->ma_flags = 0;
+	mt->ma_flags = mt_attr(mt);
 }
 EXPORT_SYMBOL_GPL(__mt_destroy);