Re: [PATCH] rust: zerocopy: update to v0.8.52

[Alice Ryhl <aliceryhl@google.com>]

On Fri, Jun 26, 2026 at 01:19:19AM +0200, Miguel Ojeda wrote:
> Update our vendored copy of `zerocopy` (and `zerocopy-derive`) to v0.8.52.
> 
> Most SPDX identifiers have been added upstream at our request [1]
> (without parentheses -- supporting them is an issue on the kernel side,
> but it does already reduce our differences). The CSS one for `rustdoc`
> was added too [2], but will be picked up in a later version.
> 
> For `zerocopy`, enable `--cfg no_fp_fmt_parse`, which was added at our
> request to avoid our local workaround [3]. This means one less difference,
> thus indicate so in our `README.md`.
> 
> For `zerocopy-derive`, enable `--cfg zerocopy_unstable_linux`. This
> allows us to use `#[derive(zerocopy_derive::most_traits)]`, a new feature
> upstream added for us [4]. We noticed a minor doc render bug [5], which
> will be fixed for a future version too.
> 
> The following script may be used to check for the remaining differences:
> 
>     for path in $(cd rust/zerocopy-derive/ && find . -type f ! -name README.md); do
>         curl --silent --show-error --location \
>             https://github.com/google/zerocopy/raw/v0.8.52/zerocopy/zerocopy-derive/src/$path |
>             git diff --no-index - rust/zerocopy-derive/$path &&
>             echo $path: OK
>     done
> 
>     for path in $(cd rust/zerocopy/ && find . -type f ! -name README.md); do
>         curl --silent --show-error --location \
>             https://github.com/google/zerocopy/raw/v0.8.52/zerocopy/$path |
>             git diff --no-index - rust/zerocopy/$path &&
>             echo $path: OK
>     done
> 
> Cc: Joshua Liebow-Feeser <joshlf@google.com>
> Cc: Jack Wrenn <jswrenn@google.com>
> Link: https://github.com/google/zerocopy/issues/3428 [1]
> Link: https://github.com/google/zerocopy/issues/3457 [2]
> Link: https://github.com/google/zerocopy/issues/3426 [3]
> Link: https://github.com/google/zerocopy/pull/3416 [4]
> Link: https://github.com/google/zerocopy/issues/3466 [5]
> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

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