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-rw-r--r--lib/maple_tree.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index bfffbb7cab26..4dd73cf936a6 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -3692,7 +3692,8 @@ static inline int mas_root_expand(struct ma_state *mas, void *entry)
mas->offset = slot;
pivots[slot] = mas->last;
if (mas->last != ULONG_MAX)
- slot++;
+ pivots[++slot] = ULONG_MAX;
+
mas->depth = 1;
mas_set_height(mas);
ma_set_meta(node, maple_leaf_64, 0, slot);