Please do not apply this patch. More testing is needed. Again, sorry
for the noise.
* Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> [220712 10:53]:
> When walking the dead leaves, use the nodes metadata for the end of the
> node. This avoids needing to use tricks for BE/LE unions.
>
> Fixes: d0aac5e48048 (Maple Tree: add new data structure)
> Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
> ---
> lib/maple_tree.c | 7 ++-----
> 1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/lib/maple_tree.c b/lib/maple_tree.c
> index 14e9ab14c1da..c661fda37665 100644
> --- a/lib/maple_tree.c
> +++ b/lib/maple_tree.c
> @@ -5390,15 +5390,12 @@ unsigned char mas_dead_leaves(struct ma_state *mas, void __rcu **slots)
> enum maple_type type;
> void *entry;
> int offset;
> + unsigned end = mas_data_end(mas);
>
> - for (offset = 0; offset < mt_slot_count(mas->node); offset++) {
> + for (offset = 0; offset <= end; offset++) {
> entry = mas_slot_locked(mas, slots, offset);
> type = mte_node_type(entry);
> node = mte_to_node(entry);
> - /* Use both node and type to catch LE & BE metadata */
> - if (!node || !type)
> - break;
> -
> mte_set_node_dead(entry);
> smp_wmb(); /* Needed for RCU */
> node->type = type;
> --
> 2.35.1
