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Miguel Ojeda 425e10586c rust: zerocopy: update to v0.8.54

Update our vendored copy of `zerocopy` (and `zerocopy-derive`) to v0.8.54.

It is a very small delta from v0.8.52, and most importantly it resolves
the unexpected lack of inlining [1] which triggered a modpost error
under `CONFIG_CC_OPTIMIZE_FOR_SIZE=y` reported by Alexandre using Gary's
suggestion [2]:

    ERROR: modpost: "_RNvMNtCs5wX7wwEUCR9_8zerocopy6layoutNtB2_8SizeInfo24try_to_nonzero_elem_size" [drivers/gpu/nova-core.ko] undefined!
    ERROR: modpost: "_RNvNtCs5wX7wwEUCR9_8zerocopy4util18padding_needed_for" [drivers/gpu/nova-core.ko] undefined!

It also resolves `most_traits` being unexpectedly documented [3] that I
reported and adds a missing SPDX license identifier [4] that I requested
to match the kernel version.

The following script may be used to check for the remaining differences:

    for path in $(cd rust/zerocopy-derive/ && find . -type f ! -name README.md); do
        curl --silent --show-error --location \
            https://github.com/google/zerocopy/raw/v0.8.54/zerocopy/zerocopy-derive/src/$path |
            git diff --no-index - rust/zerocopy-derive/$path &&
            echo $path: OK
    done

    for path in $(cd rust/zerocopy/ && find . -type f ! -name README.md); do
        curl --silent --show-error --location \
            https://github.com/google/zerocopy/raw/v0.8.54/zerocopy/$path |
            git diff --no-index - rust/zerocopy/$path &&
            echo $path: OK
    done

Cc: Joshua Liebow-Feeser <[email protected]>
Cc: Jack Wrenn <[email protected]>
Reported-by: Alexandre Courbot <[email protected]>
Closes: https://lore.kernel.org/rust-for-linux/[email protected]/ [1]
Suggested-by: Gary Guo <[email protected]>
Link: https://lore.kernel.org/rust-for-linux/[email protected]/ [2]
Link: https://github.com/google/zerocopy/issues/3466 [3]
Link: https://github.com/google/zerocopy/issues/3457 [4]
Reviewed-by: Alice Ryhl <[email protected]>
Tested-by: Alexandre Courbot <[email protected]>
Reviewed-by: Gary Guo <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>

2026-07-11 13:46:02 +02:00

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`zerocopy`

These source files come from the Rust zerocopy crate, version v0.8.54 (released 2026-07-08), hosted in the https://github.com/google/zerocopy repository, licensed under "BSD-2-Clause OR Apache-2.0 OR MIT" and only modified to tweak the SPDX license identifiers.

For copyright details, please see:

https://github.com/google/zerocopy/blob/v0.8.54/README.md?plain=1
https://github.com/google/zerocopy/blob/v0.8.54/LICENSE-BSD
https://github.com/google/zerocopy/blob/v0.8.54/LICENSE-APACHE
https://github.com/google/zerocopy/blob/v0.8.54/LICENSE-MIT

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zerocopy

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