From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx> commit 46b345848261009477552d654cb2f65000c30e4d upstream. If mas->node is an MAS_START, there are three cases, and they all assign different values to mas->node and mas->offset. So there is no need to set them to a default value before updating. Update them directly to make them easier to understand and for better readability. Link: https://lkml.kernel.org/r/20221221060058.609003-7-vernon2gm@xxxxxxxxx Cc: <Stable@xxxxxxxxxxxxxxx> Fixes: 54a611b60590 ("Maple Tree: add new data structure") Signed-off-by: Vernon Yang <vernon2gm@xxxxxxxxx> Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- lib/maple_tree.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -1339,7 +1339,7 @@ static void mas_node_count(struct ma_sta * mas_start() - Sets up maple state for operations. * @mas: The maple state. * - * If mas->node == MAS_START, then set the min, max, depth, and offset to + * If mas->node == MAS_START, then set the min, max and depth to * defaults. * * Return: @@ -1353,22 +1353,22 @@ static inline struct maple_enode *mas_st if (likely(mas_is_start(mas))) { struct maple_enode *root; - mas->node = MAS_NONE; mas->min = 0; mas->max = ULONG_MAX; mas->depth = 0; - mas->offset = 0; root = mas_root(mas); /* Tree with nodes */ if (likely(xa_is_node(root))) { mas->depth = 1; mas->node = mte_safe_root(root); + mas->offset = 0; return NULL; } /* empty tree */ if (unlikely(!root)) { + mas->node = MAS_NONE; mas->offset = MAPLE_NODE_SLOTS; return NULL; }
