2023-08-30 17:31:07 +02:00
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# `alloc`
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These source files come from the Rust standard library, hosted in
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the <https://github.com/rust-lang/rust> repository, licensed under
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"Apache-2.0 OR MIT" and adapted for kernel use. For copyright details,
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see <https://github.com/rust-lang/rust/blob/master/COPYRIGHT>.
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Please note that these files should be kept as close as possible to
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upstream. In general, only additions should be performed (e.g. new
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methods). Eventually, changes should make it into upstream so that,
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at some point, this fork can be dropped from the kernel tree.
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2023-10-24 12:59:35 +02:00
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The Rust upstream version on top of which these files are based matches
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the output of `scripts/min-tool-version.sh rustc`.
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2023-08-30 17:31:07 +02:00
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## Rationale
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On one hand, kernel folks wanted to keep `alloc` in-tree to have more
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freedom in both workflow and actual features if actually needed
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(e.g. receiver types if we ended up using them), which is reasonable.
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On the other hand, Rust folks wanted to keep `alloc` as close as
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upstream as possible and avoid as much divergence as possible, which
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is also reasonable.
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We agreed on a middle-ground: we would keep a subset of `alloc`
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in-tree that would be as small and as close as possible to upstream.
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Then, upstream can start adding the functions that we add to `alloc`
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etc., until we reach a point where the kernel already knows exactly
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what it needs in `alloc` and all the new methods are merged into
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upstream, so that we can drop `alloc` from the kernel tree and go back
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to using the upstream one.
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By doing this, the kernel can go a bit faster now, and Rust can
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slowly incorporate and discuss the changes as needed.
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