linux-kernel - Re: [PATCH v4 2/7] rust: num: add `shr` and `shl` methods to `Bounded`

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Message-Id: <DG0C2IULPNPE.BOGWDL1X80TL@garyguo.net>
Date: Wed, 28 Jan 2026 15:38:56 +0000
From: "Gary Guo" <gary@...yguo.net>
To: "Alexandre Courbot" <acourbot@...dia.com>, "Danilo Krummrich"
 <dakr@...nel.org>, "Alice Ryhl" <aliceryhl@...gle.com>, "Daniel Almeida"
 <daniel.almeida@...labora.com>, "Miguel Ojeda" <ojeda@...nel.org>, "Boqun
 Feng" <boqun.feng@...il.com>, "Gary Guo" <gary@...yguo.net>,
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, "Benno Lossin"
 <lossin@...nel.org>, "Andreas Hindborg" <a.hindborg@...nel.org>, "Trevor
 Gross" <tmgross@...ch.edu>
Cc: "Yury Norov" <yury.norov@...il.com>, "John Hubbard"
 <jhubbard@...dia.com>, "Alistair Popple" <apopple@...dia.com>, "Joel
 Fernandes" <joelagnelf@...dia.com>, "Timur Tabi" <ttabi@...dia.com>, "Edwin
 Peer" <epeer@...dia.com>, "Eliot Courtney" <ecourtney@...dia.com>, "Dirk
 Behme" <dirk.behme@...bosch.com>, "Steven Price" <steven.price@....com>,
 <rust-for-linux@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 2/7] rust: num: add `shr` and `shl` methods to
 `Bounded`

On Wed Jan 28, 2026 at 2:37 AM GMT, Alexandre Courbot wrote:
> Shifting a `Bounded` left or right changes the number of bits required
> to represent the value. Add methods that perform the shift and return a
> `Bounded` with the appropriately adjusted bit width.
> 
> These methods are particularly useful for bitfield extraction.
> 
> Suggested-by: Alice Ryhl <aliceryhl@...gle.com>
> Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>
> Tested-by: Dirk Behme <dirk.behme@...bosch.com>
> Acked-by: Miguel Ojeda <ojeda@...nel.org>
> Signed-off-by: Alexandre Courbot <acourbot@...dia.com>

Reviewed-by: Gary Guo <gary@...yguo.net>

> ---
>  rust/kernel/num/bounded.rs | 42 ++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 42 insertions(+)