rust: pin-init: implement ZeroableOption for function pointers with up to 20 arguments

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`Option<[unsafe] [extern "abi"] fn(...args...) -> ret>` is documented
[1] to also have the `None` variant equal all zeroes.

Link: https://doc.rust-lang.org/stable/std/option/index.html#representation [1]
Link: https://github.com/Rust-for-Linux/pin-init/pull/56/commits/b6c1ab4fb3699765f81ae512ecac5a2f032d8d51
Link: https://lore.kernel.org/all/20250523145125.523275-7-lossin@kernel.org
Signed-off-by: Benno Lossin <lossin@kernel.org>

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Benno Lossin 2025-05-23 16:51:02 +02:00

parent 9f47353870

commit ec87ec35ca

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rust/pin-init/src/lib.rs

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