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rust: error: implement ZeroableOption for Error

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Rust Binder wants to store an Option<Error> in TransactionInfo, which
derives Zeroable. Implement ZeroableOption for Error so that
Option<Error> implements Zeroable.

Acked-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Link: https://patch.msgid.link/20261013-binder-consolidate-txn-prints-v2-1-cf78927dab23@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alice Ryhl 2026-10-13 12:37:54 +00:00 committed by Greg Kroah-Hartman
parent ba9d2c7ea7
commit aeef0f8a3a
1 changed files with 5 additions and 0 deletions
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5
rust/kernel/error.rs
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@ -199,8 +199,13 @@ macro_rules! declare_err {
///
/// The value is a valid `errno` (i.e. `>= -MAX_ERRNO && < 0`).
#[derive(Clone, Copy, PartialEq, Eq)]
#[repr(transparent)]
pub struct Error(NonZeroI32);
// SAFETY: `Error` is `repr(transparent)` over `NonZeroI32`, which is part of the option layout
// optimization guarantee, so all zeroes is a valid representation for `None`.
unsafe impl pin_init::ZeroableOption for Error {}
impl Error {
/// Creates an [`Error`] from a kernel error code.
///