Re: [PATCH v4 0/7] rust: use Delta instead of raw jiffies for timeouts and delays

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

"FUJITA Tomonori" <tomo@flapping.org> writes:

> On Thu, 30 Jul 2026 14:09:59 +0100
> "Gary Guo" <gary@garyguo.net> wrote:
>
>> On Wed Jul 22, 2026 at 10:49 PM BST, FUJITA Tomonori wrote:
>>> From: FUJITA Tomonori <fujita.tomonori@gmail.com>
>>>
>>> CondVar::wait_interruptible_timeout() and Queue::enqueue_delayed() use
>>> a raw jiffies count (a plain c_ulong alias with no type
>>> safety). Callers have to know on their own that the value meant
>>> jiffies and convert to/from it themselves, which is easy to get wrong
>>> (e.g. passing a millisecond value where a jiffies value is expected).
>>>
>>> Both APIs just take a span of time so, they can use the Delta type
>>> instead.
>>>
>>> This series makes Delta generic over its time unit with Nsec and Jiffy
>>> types, switches CondVar and Queue to use Delta instead of raw jiffies
>>> (updating binder's ioctl_freeze(), the only caller of
>>> wait_interruptible_timeout()), and then removes the now-unused Jiffies
>>> and Msecs type aliases.
>>
>> There are more jiffy users being added so we should take this sooner than later:
>> https://lore.kernel.org/rust-for-linux/20260726223613.1242940-1-dakr@kernel.org/#t
>>
>> Andreas, any plan on taking this via timekeeping-next? I suppose Boqun
>> could also be taken via rust-sync tree if you give an ack?
>
> Agreed. Getting this into the next merge window would be great.

I was on vacation, back now.

Getting this in the merge window for v7.3 is probably a little tight. We
should aim for v7.4.

I will take closer look this week.


Best regards,
Andreas Hindborg