Re: [PATCH] maple tree: Use goto label to simplify code

From: Liam R. Howlett
Date: Tue Jun 24 2025 - 11:45:57 EST


* Dev Jain <dev.jain@xxxxxxx> [250624 04:08]:
> Use the underflow goto label to set the status to ma_underflow and return
> NULL, as is being done elsewhere.

Thanks for this, but the stacking of labels is unpleasant to read.

A new line like I've added makes it a bit better. It's more my fault
having the existing code as it is.

>
> Signed-off-by: Dev Jain <dev.jain@xxxxxxx>
> ---
> 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 00524e55a21e..25cf2bc607ca 100644
> --- a/lib/maple_tree.c
> +++ b/lib/maple_tree.c
> @@ -4565,11 +4565,8 @@ static void *mas_prev_slot(struct ma_state *mas, unsigned long min, bool empty)
> return entry;
>
> if (!empty) {
> - if (mas->index <= min) {
> - mas->status = ma_underflow;
> - return NULL;
> - }
> -
> + if (mas->index <= min)
> + goto underflow;

> goto again;
> }

Andrew, can you just add a new line like I have above?

Reviewed-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>

Thanks,
Liam