linux-kernel - Re: [PATCH 1/2] rust: time: Implement Add<Delta>/Sub<Delta> for Instant

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Message-ID: <CAH5fLgioqkcaJ_M7q3CEERPniREidqnWxS1=_HM89mFN5=q=iQ@mail.gmail.com>
Date: Mon, 28 Jul 2025 20:23:23 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: Lyude Paul <lyude@...hat.com>
Cc: rust-for-linux@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>, 
	Boqun Feng <boqun.feng@...il.com>, linux-kernel@...r.kernel.org, 
	Andreas Hindborg <a.hindborg@...nel.org>, FUJITA Tomonori <fujita.tomonori@...il.com>, 
	Frederic Weisbecker <frederic@...nel.org>, Anna-Maria Behnsen <anna-maria@...utronix.de>, 
	John Stultz <jstultz@...gle.com>, Stephen Boyd <sboyd@...nel.org>, Miguel Ojeda <ojeda@...nel.org>, 
	Alex Gaynor <alex.gaynor@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <lossin@...nel.org>, Trevor Gross <tmgross@...ch.edu>, 
	Danilo Krummrich <dakr@...nel.org>
Subject: Re: [PATCH 1/2] rust: time: Implement Add<Delta>/Sub<Delta> for Instant

On Mon, Jul 28, 2025 at 8:21 PM Lyude Paul <lyude@...hat.com> wrote:
>
> On Sun, 2025-07-27 at 07:33 +0000, Alice Ryhl wrote:
> >
> > I'm not so sure what to think about this clamp logic. Maybe it is the
> > best way to go ...
>
> Yeah - I was kinda hoping the mailing list would give me the direction to go
> on this one. The other thing that I considered that might make more sense was
> instead to implement these so that when over/underflow checking is enabled we
> panic when we get a value out of the range of 0 to KTIME_MAX. Would that make
> more sense?

Well, it would certainly be more consistent.

What does your use-case need?

Alice