rust: pin-init: add MaybeZeroable derive macro

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This derive macro implements `Zeroable` for structs & unions precisely
if all fields also implement `Zeroable` and does nothing otherwise. The
plain `Zeroable` derive macro instead errors when it cannot derive
`Zeroable` safely. The `MaybeZeroable` derive macro is useful in cases
where manual checking is infeasible such as with the bindings crate.

Move the zeroable generics parsing into a standalone function in order
to avoid code duplication between the two derive macros.

Link: https://github.com/Rust-for-Linux/pin-init/pull/42/commits/1165cdad1a391b923efaf30cf76bc61e38da022e
Signed-off-by: Benno Lossin <benno.lossin@proton.me>

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This commit is contained in:

Benno Lossin 2025-04-21 22:18:52 +00:00

parent a313d41a2b

commit 00fccd3ecc

4 changed files with 120 additions and 1 deletions

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5

rust/pin-init/internal/src/lib.rs

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27

rust/pin-init/internal/src/zeroable.rs

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rust/pin-init/src/lib.rs

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59

rust/pin-init/src/macros.rs

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