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rust: time: Seal the HrTimerMode trait

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Prevent downstream crates or drivers from implementing `HrTimerMode`
for arbitrary types, which could otherwise leads to unsupported
behavior.

Introduce a `private::Sealed` trait and implement it for all types
that implement `HrTimerMode`.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20250617232806.3950141-1-fujita.tomonori@gmail.com
Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
This commit is contained in:
FUJITA Tomonori 2025-06-18 08:28:06 +09:00 committed by Andreas Hindborg
parent 69f66cf458
commit fc38b7ff87
1 changed files with 20 additions and 1 deletions
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21
rust/kernel/time/hrtimer.rs
View file

@ -444,8 +444,27 @@ fn as_nanos(&self) -> i64 {
}
}
mod private {
use crate::time::ClockSource;
pub trait Sealed {}
impl<C: ClockSource> Sealed for super::AbsoluteMode<C> {}
impl<C: ClockSource> Sealed for super::RelativeMode<C> {}
impl<C: ClockSource> Sealed for super::AbsolutePinnedMode<C> {}
impl<C: ClockSource> Sealed for super::RelativePinnedMode<C> {}
impl<C: ClockSource> Sealed for super::AbsoluteSoftMode<C> {}
impl<C: ClockSource> Sealed for super::RelativeSoftMode<C> {}
impl<C: ClockSource> Sealed for super::AbsolutePinnedSoftMode<C> {}
impl<C: ClockSource> Sealed for super::RelativePinnedSoftMode<C> {}
impl<C: ClockSource> Sealed for super::AbsoluteHardMode<C> {}
impl<C: ClockSource> Sealed for super::RelativeHardMode<C> {}
impl<C: ClockSource> Sealed for super::AbsolutePinnedHardMode<C> {}
impl<C: ClockSource> Sealed for super::RelativePinnedHardMode<C> {}
}
/// Operational mode of [`HrTimer`].
pub trait HrTimerMode {
pub trait HrTimerMode: private::Sealed {
/// The C representation of hrtimer mode.
const C_MODE: bindings::hrtimer_mode;