From: Peng Zhang <zhangpeng...@bytedance.com> 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/20231027033845.90608-10-zhangpeng...@bytedance.com Signed-off-by: Peng Zhang <zhangpeng...@bytedance.com> Reviewed-by: Liam R. Howlett <liam.howl...@oracle.com> Cc: Christian Brauner <brau...@kernel.org> Cc: Jonathan Corbet <cor...@lwn.net> Cc: Mateusz Guzik <mjgu...@gmail.com> Cc: Mathieu Desnoyers <mathieu.desnoy...@efficios.com> Cc: Matthew Wilcox <wi...@infradead.org> Cc: Michael S. Tsirkin <m...@redhat.com> Cc: Mike Christie <michael.chris...@oracle.com> Cc: Nicholas Piggin <npig...@gmail.com> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Suren Baghdasaryan <sur...@google.com> Signed-off-by: Andrew Morton <a...@linux-foundation.org> Signed-off-by: Yu Kuai <yuku...@huawei.com> --- 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
