Re: [PATCH v4 0/2] rust: transmute: add `as_bytes(_mut)` methods for `AsBytes` trait

[Alice Ryhl <aliceryhl@google.com>]

On Mon, Jul 28, 2025 at 09:47:50PM +0900, Alexandre Courbot wrote:
> This is the sister patch of [1], providing an `as_bytes` method for
> `AsBytes`, and an `as_bytes_mut` accessor for types also implementing
> `FromBytes`.
> 
> It is going to be used in Nova, but should also be universally useful -
> if anything, it felt a bit strange that `AsBytes` did not provide this
> so far.
> 
> [1] https://lore.kernel.org/rust-for-linux/20250624042802.105623-1-christiansantoslima21@gmail.com/
> 
> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
> ---
> Changes in v4:
> - Add the `as_bytes_mut` method for types also implementing `FromBytes`.
>   (thanks Alice!)
> - Link to v3: https://lore.kernel.org/r/20250726-as_bytes-v3-1-eb7514faab28@nvidia.com
> 
> Changes in v3:
> - Use `ptr::from_ref` instead of `as *const T`.
> - Link to v2: https://lore.kernel.org/r/20250725-as_bytes-v2-1-c6584c211a6c@nvidia.com
> 
> Changes in v2:
> - Use `size_of_val` to provide a default implementation for both `Sized`
>   and non-`Sized` types, and remove `AsBytesSized`. (thanks Alice!)
> - Link to v1: https://lore.kernel.org/r/20250725-as_bytes-v1-1-6f06a3744f69@nvidia.com
> 
> ---
> Alexandre Courbot (2):
>       rust: transmute: add `as_bytes` method for `AsBytes` trait
>       rust: transmute: add `as_bytes_mut` method to `AsBytes` trait

Reviewed-by: Alice Ryhl <aliceryhl@google.com>