From c47024ba198b01cab6bb6e3e5a69b73ed2f2aa16 Mon Sep 17 00:00:00 2001 From: Benno Lossin Date: Fri, 23 May 2025 16:50:58 +0200 Subject: [PATCH] rust: pin-init: add `Zeroable::init_zeroed` The trait function delegates to the already existing `init_zeroed` function that returns a zeroing initializer for `Self`. The syntax `..Zeroable::init_zeroed()` is already used by the initialization macros to initialize all fields that are not mentioned in the initializer with zero. Therefore it is expected that the function also exists on the trait. Link: https://github.com/Rust-for-Linux/pin-init/pull/56/commits/a424a6c9af5a4418a8e5e986a3db26a4432e2f1a Link: https://lore.kernel.org/all/20250523145125.523275-3-lossin@kernel.org Signed-off-by: Benno Lossin --- rust/pin-init/src/lib.rs | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/rust/pin-init/src/lib.rs b/rust/pin-init/src/lib.rs index 2f7ca94451e6..ef7e5a1e1c48 100644 --- a/rust/pin-init/src/lib.rs +++ b/rust/pin-init/src/lib.rs @@ -1495,7 +1495,18 @@ pub unsafe trait PinnedDrop: __internal::HasPinData { /// ```rust,ignore /// let val: Self = unsafe { core::mem::zeroed() }; /// ``` -pub unsafe trait Zeroable {} +pub unsafe trait Zeroable { + /// Create a new zeroed `Self`. + /// + /// The returned initializer will write `0x00` to every byte of the given `slot`. + #[inline] + fn init_zeroed() -> impl Init + where + Self: Sized, + { + init_zeroed() + } +} /// Marker trait for types that allow `Option` to be set to all zeroes in order to write /// `None` to that location.