linux-kernel - Re: [PATCH v9 5/8] rust: time: Add wrapper for fsleep() function

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Message-ID: <CAH5fLghSx0UfOc3wycR5CDeKwLGupkBGy2Edf912a=362VQggA@mail.gmail.com>
Date: Mon, 27 Jan 2025 09:55:38 +0100
From: Alice Ryhl <aliceryhl@...gle.com>
To: FUJITA Tomonori <fujita.tomonori@...il.com>
Cc: linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org, 
	netdev@...r.kernel.org, andrew@...n.ch, hkallweit1@...il.com, 
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	dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com, 
	mgorman@...e.de, vschneid@...hat.com, tgunders@...hat.com
Subject: Re: [PATCH v9 5/8] rust: time: Add wrapper for fsleep() function

On Sat, Jan 25, 2025 at 11:20 AM FUJITA Tomonori
<fujita.tomonori@...il.com> wrote:
>
> Add a wrapper for fsleep(), flexible sleep functions in
> include/linux/delay.h which typically deals with hardware delays.
>
> The kernel supports several sleep functions to handle various lengths
> of delay. This adds fsleep(), automatically chooses the best sleep
> method based on a duration.
>
> sleep functions including fsleep() belongs to TIMERS, not
> TIMEKEEPING. They are maintained separately. rust/kernel/time.rs is an
> abstraction for TIMEKEEPING. To make Rust abstractions match the C
> side, add rust/kernel/time/delay.rs for this wrapper.
>
> fsleep() can only be used in a nonatomic context. This requirement is
> not checked by these abstractions, but it is intended that klint [1]
> or a similar tool will be used to check it in the future.
>
> Link: https://rust-for-linux.com/klint [1]
> Signed-off-by: FUJITA Tomonori <fujita.tomonori@...il.com>

Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>