Re: [PATCH v11 2/5] rust: gpu: buddy: use Alignment size constants

[Yury Norov <ynorov@nvidia.com>]

On Mon, Nov 09, 2026 at 05:32:50PM +0900, Eliot Courtney wrote:
> Use `SizeConstants` for Alignment that are implemented now.
> 
> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
> Reviewed-by: Alice Ryhl <aliceryhl@google.com>
> Signed-off-by: Eliot Courtney <ecourtney@nvidia.com>

Reviewed-by: Yury Norov <ynorov@nvidia.com>

> ---
>  rust/kernel/gpu/buddy.rs | 26 +++++++++++++-------------
>  1 file changed, 13 insertions(+), 13 deletions(-)
> 
> diff --git a/rust/kernel/gpu/buddy.rs b/rust/kernel/gpu/buddy.rs
> index d502ada6ebbd..691bb40629d4 100644
> --- a/rust/kernel/gpu/buddy.rs
> +++ b/rust/kernel/gpu/buddy.rs
> @@ -31,11 +31,11 @@
>  //! let buddy = GpuBuddy::new(GpuBuddyParams {
>  //!     base_offset: 0,
>  //!     size: SZ_1G as u64,
> -//!     chunk_size: Alignment::new::<SZ_4K>(),
> +//!     chunk_size: Alignment::SZ_4K,
>  //! })?;
>  //!
>  //! assert_eq!(buddy.size(), SZ_1G as u64);
> -//! assert_eq!(buddy.chunk_size(), Alignment::new::<SZ_4K>());
> +//! assert_eq!(buddy.chunk_size(), Alignment::SZ_4K);
>  //! let initial_free = buddy.avail();
>  //!
>  //! // Allocate 16MB. Block lands at the top of the address range.
> @@ -43,7 +43,7 @@
>  //!     buddy.alloc_blocks(
>  //!         GpuBuddyAllocMode::Simple,
>  //!         SZ_16M as u64,
> -//!         Alignment::new::<SZ_16M>(),
> +//!         Alignment::SZ_16M,
>  //!         GpuBuddyAllocFlags::default(),
>  //!     ),
>  //!     GFP_KERNEL,
> @@ -74,14 +74,14 @@
>  //! # let buddy = GpuBuddy::new(GpuBuddyParams {
>  //! #     base_offset: 0,
>  //! #     size: SZ_1G as u64,
> -//! #     chunk_size: Alignment::new::<SZ_4K>(),
> +//! #     chunk_size: Alignment::SZ_4K,
>  //! # })?;
>  //! # let initial_free = buddy.avail();
>  //! let topdown = KBox::pin_init(
>  //!     buddy.alloc_blocks(
>  //!         GpuBuddyAllocMode::TopDown,
>  //!         SZ_16M as u64,
> -//!         Alignment::new::<SZ_16M>(),
> +//!         Alignment::SZ_16M,
>  //!         GpuBuddyAllocFlags::default(),
>  //!     ),
>  //!     GFP_KERNEL,
> @@ -114,7 +114,7 @@
>  //! # let buddy = GpuBuddy::new(GpuBuddyParams {
>  //! #     base_offset: 0,
>  //! #     size: SZ_1G as u64,
> -//! #     chunk_size: Alignment::new::<SZ_4K>(),
> +//! #     chunk_size: Alignment::SZ_4K,
>  //! # })?;
>  //! # let initial_free = buddy.avail();
>  //! // Create fragmentation by allocating 4MB blocks at [0,4M) and [8M,12M).
> @@ -122,7 +122,7 @@
>  //!     buddy.alloc_blocks(
>  //!         GpuBuddyAllocMode::Range(0..SZ_4M as u64),
>  //!         SZ_4M as u64,
> -//!         Alignment::new::<SZ_4M>(),
> +//!         Alignment::SZ_4M,
>  //!         GpuBuddyAllocFlags::default(),
>  //!     ),
>  //!     GFP_KERNEL,
> @@ -133,7 +133,7 @@
>  //!     buddy.alloc_blocks(
>  //!         GpuBuddyAllocMode::Range(SZ_8M as u64..(SZ_8M + SZ_4M) as u64),
>  //!         SZ_4M as u64,
> -//!         Alignment::new::<SZ_4M>(),
> +//!         Alignment::SZ_4M,
>  //!         GpuBuddyAllocFlags::default(),
>  //!     ),
>  //!     GFP_KERNEL,
> @@ -145,7 +145,7 @@
>  //!     buddy.alloc_blocks(
>  //!         GpuBuddyAllocMode::Range(0..SZ_16M as u64),
>  //!         SZ_8M as u64,
> -//!         Alignment::new::<SZ_4M>(),
> +//!         Alignment::SZ_4M,
>  //!         GpuBuddyAllocFlags::default(),
>  //!     ),
>  //!     GFP_KERNEL,
> @@ -178,14 +178,14 @@
>  //! let small = GpuBuddy::new(GpuBuddyParams {
>  //!     base_offset: 0,
>  //!     size: SZ_16M as u64,
> -//!     chunk_size: Alignment::new::<SZ_4K>(),
> +//!     chunk_size: Alignment::SZ_4K,
>  //! })?;
>  //!
>  //! let _hole1 = KBox::pin_init(
>  //!     small.alloc_blocks(
>  //!         GpuBuddyAllocMode::Range(0..SZ_4M as u64),
>  //!         SZ_4M as u64,
> -//!         Alignment::new::<SZ_4M>(),
> +//!         Alignment::SZ_4M,
>  //!         GpuBuddyAllocFlags::default(),
>  //!     ),
>  //!     GFP_KERNEL,
> @@ -195,7 +195,7 @@
>  //!     small.alloc_blocks(
>  //!         GpuBuddyAllocMode::Range(SZ_8M as u64..(SZ_8M + SZ_4M) as u64),
>  //!         SZ_4M as u64,
> -//!         Alignment::new::<SZ_4M>(),
> +//!         Alignment::SZ_4M,
>  //!         GpuBuddyAllocFlags::default(),
>  //!     ),
>  //!     GFP_KERNEL,
> @@ -206,7 +206,7 @@
>  //!     small.alloc_blocks(
>  //!         GpuBuddyAllocMode::Simple,
>  //!         SZ_8M as u64,
> -//!         Alignment::new::<SZ_4M>(),
> +//!         Alignment::SZ_4M,
>  //!         GpuBuddyAllocFlag::Contiguous,
>  //!     ),
>  //!     GFP_KERNEL,
> 
> -- 
> 2.56.0
>