linux.git/rust/zerocopy/rustdoc, branch master

rust: zerocopy: update to v0.8.54

2026-07-11T11:46:02+00:00

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 Cc: Jack Wrenn Reported-by: Alexandre Courbot Closes: https://lore.kernel.org/rust-for-linux/20260708-zerocopy-export-v1-1-2bfc355853c6@nvidia.com/ [1] Suggested-by: Gary Guo Link: https://lore.kernel.org/rust-for-linux/DJT6235B3DOV.222XR5O6VHG4M@garyguo.net/ [2] Link: https://github.com/google/zerocopy/issues/3466 [3] Link: https://github.com/google/zerocopy/issues/3457 [4] Reviewed-by: Alice Ryhl Tested-by: Alexandre Courbot Reviewed-by: Gary Guo Link: https://patch.msgid.link/20260709211311.142544-1-ojeda@kernel.org Signed-off-by: Miguel Ojeda

rust: zerocopy: add SPDX License Identifiers

2026-06-09T02:13:22+00:00

Originally, when the Rust upstream `alloc` standard library crate was vendored, the SPDX License Identifiers were added to every file so that the license on those was clear. The same happened with the vendoring of `proc_macro2`, `quote` and `syn`. Please see: commit 057b8d257107 ("rust: adapt `alloc` crate to the kernel") commit 69942c0a8965 ("rust: syn: add SPDX License Identifiers") commit ddfa1b279d08 ("rust: quote: add SPDX License Identifiers") commit a9acfceb9614 ("rust: proc-macro2: add SPDX License Identifiers") Thus do the same for the `zerocopy` crate. This makes `scripts/spdxcheck.py` pass: use parentheses like commit 06e9bfc1e57d ("ionic: make spdxcheck.py happy") did since we have two `OR` operators in the expression (three licenses). SPDX identifiers are not added to the `benches` files because they are included in rendered documentation. Nevertheless, the `README.md` to be added by a later commit mentions the license. Finally, as requested, I filed an issue [1] with upstream about it. Cc: Joshua Liebow-Feeser Cc: Jack Wrenn Link: https://github.com/google/zerocopy/issues/3428 [1] Link: https://patch.msgid.link/20260608141439.182634-10-ojeda@kernel.org Signed-off-by: Miguel Ojeda

rust: zerocopy: import crate

2026-06-09T02:13:22+00:00

This is a subset of the Rust `zerocopy` crate, version v0.8.50 (released 2026-05-31), licensed under "BSD-2-Clause OR Apache-2.0 OR MIT", from: https://github.com/google/zerocopy/tree/v0.8.50 The files are copied as-is, with no modifications whatsoever (not even adding the SPDX identifiers). The `benches` folder is added (i.e. not just `src` like in other cases) since the files there are included in the rendered documentation, as well as the `rustdoc` CSS style file that is needed to make those visually more understandable. For copyright details, please see: https://github.com/google/zerocopy/blob/v0.8.50/README.md?plain=1 https://github.com/google/zerocopy/blob/v0.8.50/LICENSE-BSD https://github.com/google/zerocopy/blob/v0.8.50/LICENSE-APACHE https://github.com/google/zerocopy/blob/v0.8.50/LICENSE-MIT The next two patches modify these files as needed for use within the kernel. This patch split allows reviewers to double-check the import and to clearly see the differences introduced. The following script may be used to verify the contents: for path in $(cd rust/zerocopy/ && find . -type f); do curl --silent --show-error --location \ https://github.com/google/zerocopy/raw/v0.8.50/$path \ | diff --unified rust/zerocopy/$path - && echo $path: OK done Cc: Joshua Liebow-Feeser Cc: Jack Wrenn Link: https://patch.msgid.link/20260608141439.182634-9-ojeda@kernel.org Signed-off-by: Miguel Ojeda