From: Peng Zhang <[email protected]> commit 8e50d32c7a89bde896945e4e572ef28ccd87bbf8 upstream.
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. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Peng Zhang <[email protected]> Reviewed-by: Liam R. Howlett <[email protected]> Cc: Christian Brauner <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Mateusz Guzik <[email protected]> Cc: Mathieu Desnoyers <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Michael S. Tsirkin <[email protected]> Cc: Mike Christie <[email protected]> Cc: Nicholas Piggin <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Suren Baghdasaryan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Yu Kuai <[email protected]> --- lib/maple_tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index 6f1addbbc820..97a610307d38 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -6774,7 +6774,7 @@ 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); -- 2.39.2
