Re: [PATCH] rust/time: Add Delta::from_nanos()

[Andreas Hindborg <a.hindborg@kernel.org>]

FUJITA Tomonori <fujita.tomonori@gmail.com> writes:

> On Fri, 14 Nov 2025 13:42:06 -0500
> Lyude Paul <lyude@redhat.com> wrote:
>
>> Since rvkms is going to need to create its own Delta instances, and we
>> already have functions for creating Delta with every other unit of time.
>> 
>> Signed-off-by: Lyude Paul <lyude@redhat.com>
>> ---
>>  rust/kernel/time.rs | 6 ++++++
>>  1 file changed, 6 insertions(+)
>> 
>> diff --git a/rust/kernel/time.rs b/rust/kernel/time.rs
>> index 6ea98dfcd0278..2b096e5a61cda 100644
>> --- a/rust/kernel/time.rs
>> +++ b/rust/kernel/time.rs
>> @@ -363,6 +363,12 @@ impl Delta {
>>      /// A span of time equal to zero.
>>      pub const ZERO: Self = Self { nanos: 0 };
>>  
>> +    /// Create a new [`Delta`] from a number of nanoseconds.
>> +    #[inline]
>> +    pub const fn from_nanos(nanos: i64) -> Self {
>> +        Self { nanos }
>> +    }
>> +
>>      /// Create a new [`Delta`] from a number of microseconds.
>>      ///
>>      /// The `micros` can range from -9_223_372_036_854_775 to 9_223_372_036_854_775.
>
> For consistency with the other methods, perhaps we should also mention
> the valid nanos range in the comment?

On second thought, since valid range is any valid `i64` value, I don't
think this matters.

Best regards,
Andreas Hindborg