linux-kernel - Re: [PATCH v2 2/3] rust: time: Make Instant generic over ClockSource

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Message-ID: <87jz5y1g1f.fsf@kernel.org>
Date: Fri, 30 May 2025 13:42:04 +0200
From: Andreas Hindborg <a.hindborg@...nel.org>
To: FUJITA Tomonori <fujita.tomonori@...il.com>
Cc: rust-for-linux@...r.kernel.org,  boqun.feng@...il.com,
  frederic@...nel.org,  lyude@...hat.com,  tglx@...utronix.de,
  anna-maria@...utronix.de,  jstultz@...gle.com,  sboyd@...nel.org,
  ojeda@...nel.org,  alex.gaynor@...il.com,  gary@...yguo.net,
  bjorn3_gh@...tonmail.com,  benno.lossin@...ton.me,  aliceryhl@...gle.com,
  tmgross@...ch.edu,  dakr@...nel.org,  linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] rust: time: Make Instant generic over ClockSource

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

> Refactor the Instant type to be generic over a ClockSource type
> parameter, enabling static enforcement of clock correctness across
> APIs that deal with time. Previously, the clock source was implicitly
> fixed (typically CLOCK_MONOTONIC), and developers had to ensure
> compatibility manually.
>
> This design eliminates runtime mismatches between clock sources, and
> enables stronger type-level guarantees throughout the timer subsystem.
>
> Signed-off-by: FUJITA Tomonori <fujita.tomonori@...il.com>


Reviewed-by: Andreas Hindborg <a.hindborg@...nel.org>


Best regards,
Andreas Hindborg