maple_tree: we don't set offset to MAPLE_NODE_SLOTS on error

When mas_anode_descend() not find gap, it sets -EBUSY instead of setting
offset to MAPLE_NODE_SLOTS.

Link: https://lkml.kernel.org/r/20241116014805.11547-4-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 3174234d77cb9625cafa059b937bbb9a4f0de282..fe7f9e1f5bbb710cbd27717a4b75f9242e0b28db 100644 (file)
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -5000,8 +5000,8 @@ static inline void mas_awalk(struct ma_state *mas, unsigned long size)
         * There are 4 options:
         * go to child (descend)
         * go back to parent (ascend)
-        * no gap found. (return, slot == MAPLE_NODE_SLOTS)
-        * found the gap. (return, slot != MAPLE_NODE_SLOTS)
+        * no gap found. (return, error == -EBUSY)
+        * found the gap. (return)
         */
        while (!mas_is_err(mas) && !mas_anode_descend(mas, size)) {
                if (last == mas->node)
@@ -5086,9 +5086,6 @@ int mas_empty_area(struct ma_state *mas, unsigned long min,
                return xa_err(mas->node);
 
        offset = mas->offset;
-       if (unlikely(offset == MAPLE_NODE_SLOTS))
-               return -EBUSY;
-
        node = mas_mn(mas);
        mt = mte_node_type(mas->node);
        pivots = ma_pivots(node, mt);