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Every type that implements `AsBytes` should be able to provide its byte representation. Introduce the `as_bytes` method that returns the implementer as a stream of bytes, and provide a default implementation that should be suitable for any type that satisfies `AsBytes`'s safety requirements. [acourbot@nvidia.com: use fully qualified `core::mem::size_of_val` to build with Rust 1.78.] Reviewed-by: Danilo Krummrich <dakr@kernel.org> Reviewed-by: Benno Lossin <lossin@kernel.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Gary Guo <gary@garyguo.net> Acked-by: Miguel Ojeda <ojeda@kernel.org> Link: https://lore.kernel.org/r/20250801-as_bytes-v5-1-975f87d5dc85@nvidia.com Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>