Commit fc38b7ff authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by Andreas Hindborg
Browse files

rust: time: Seal the HrTimerMode trait 



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: default avatarFUJITA Tomonori <fujita.tomonori@gmail.com>
Reviewed-by: default avatarBoqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20250617232806.3950141-1-fujita.tomonori@gmail.com


Signed-off-by: default avatarAndreas Hindborg <a.hindborg@kernel.org>
parent 69f66cf4

rust/kernel/time/hrtimer.rs

+20 −1
Original line number Diff line number Diff line
@@ -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;