Re: [PATCH 4/6] rust: hrtimer: Add HrTimerClockBase::time()

[Lyude Paul <lyude@redhat.com>]

On Tue, 2025-04-08 at 14:00 +0200, Andreas Hindborg wrote:
> "Lyude Paul" <lyude@redhat.com> writes:
> 
> > This adds a wrapper for the get_time() callback contained within a
> > hrtimer_clock_base struct. We'll use this in the next commit in order to
> > implement HrTimerCallbackContext::forward_now().
> > 
> > Signed-off-by: Lyude Paul <lyude@redhat.com>
> > ---
> >  rust/kernel/time/hrtimer.rs | 10 ++++++++++
> >  1 file changed, 10 insertions(+)
> > 
> > diff --git a/rust/kernel/time/hrtimer.rs b/rust/kernel/time/hrtimer.rs
> > index f633550882247..521ff1a8a5aa8 100644
> > --- a/rust/kernel/time/hrtimer.rs
> > +++ b/rust/kernel/time/hrtimer.rs
> > @@ -186,6 +186,16 @@ unsafe fn from_raw<'a>(ptr: *mut bindings::hrtimer_clock_base) -> &'a Self {
> >          // - Our data layout is equivalent to said struct via our type invariants.
> >          unsafe { &*ptr.cast() }
> >      }
> > +
> > +    /// Retrieve the current time from this [`HrTimerClockBase`].
> > +    fn time(&self) -> Ktime {
> > +        // SAFETY: This callback is initialized to a valid NonNull function for as long as this type
> > +        // is exposed to users.
> 
> Why is that? Is it by C api contract?

Correct - I will mention this in the safety comment for the next respin

> 
> 
> Best regards,
> Andreas Hindborg
> 
> 
> 

-- 
Cheers,
 Lyude Paul (she/her)
 Software Engineer at Red Hat

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