Re: [PATCH 05/27] gpu: nova-core: zero-pad radix3 page table levels to page boundary

[Timur Tabi]

On Tue, 2026-08-18 at 20:51 -0700, John Hubbard wrote:
> diff --git a/drivers/gpu/nova-core/firmware/radix3.rs b/drivers/gpu/nova-
> core/firmware/radix3.rs
> index b60611c7bea0..f14ad4e82d3d 100644
> --- a/drivers/gpu/nova-core/firmware/radix3.rs
> +++ b/drivers/gpu/nova-core/firmware/radix3.rs
> @@ -67,22 +67,18 @@ pub(crate) fn new<'a>(
>              Ok(try_pin_init!(Self {
>                  data <- SGTable::new(dev, data, DataDirection::ToDevice, GFP_KERNEL),
>                  level2 <- {
> -                    VVec::<u8>::with_capacity(
> -                        data.iter().count() * core::mem::size_of::<u64>(),
> -                        GFP_KERNEL,
> -                    )
> -                    .map_err(|_| ENOMEM)
> -                    .and_then(|level2| map_into_lvl(&data, level2))
> -                    .map(|level2| SGTable::new(dev, level2, DataDirection::ToDevice,
> GFP_KERNEL))?
> +                    let level2 = VVec::<u8>::with_capacity(lvl_size(&data), GFP_KERNEL)
> +                        .map_err(|_| ENOMEM)
> +                        .and_then(|level2| map_into_lvl(&data, level2))?;
> +
> +                    SGTable::new(dev, level2, DataDirection::ToDevice, GFP_KERNEL)

Could you use the new Vec::zeroed() to get a buffer that's already all zeroed-out?