Re: [PATCH v1 1/2] rust: add udelay() function

[Andreas Hindborg]

"Miguel Ojeda" <miguel.ojeda.sandonis@xxxxxxxxx> writes:

> On Tue, Aug 26, 2025 at 1:59 PM FUJITA Tomonori
> <fujita.tomonori@xxxxxxxxx> wrote:
>>
>> This can lead to an unexpected delay duration, but it's safe in Rust’s
>> sense of safety?
>
> If it is just unexpected behavior, then yeah.
>
> Perhaps Andreas is referring to C overflow UB? If that is the case,
> then in the kernel it is actually defined due to
> `-fno-strict-overflow`.

OK, cool Then I would suggest that we just add a small note in the docs
about the C behavior that even though passing an invalid value is
considered a bug, it will not cause UB or memory unsafety.


Best regards,
Andreas Hindborg