linux-kernel - Re: [PATCH v12 3/5] rust: io: factor out MMIO read/write macros

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Message-Id: <DFUU3EZKTPPV.18K3I0INY03QK@nvidia.com>
Date: Thu, 22 Jan 2026 13:30:26 +0900
From: "Alexandre Courbot" <acourbot@...dia.com>
To: "Zhi Wang" <zhiw@...dia.com>
Cc: <rust-for-linux@...r.kernel.org>, <linux-pci@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, <dakr@...nel.org>, <aliceryhl@...gle.com>,
 <bhelgaas@...gle.com>, <kwilczynski@...nel.org>, <ojeda@...nel.org>,
 <alex.gaynor@...il.com>, <boqun.feng@...il.com>, <gary@...yguo.net>,
 <bjorn3_gh@...tonmail.com>, <lossin@...nel.org>, <a.hindborg@...nel.org>,
 <tmgross@...ch.edu>, <markus.probst@...teo.de>, <helgaas@...nel.org>,
 <cjia@...dia.com>, <smitra@...dia.com>, <ankita@...dia.com>,
 <aniketa@...dia.com>, <kwankhede@...dia.com>, <targupta@...dia.com>,
 <joelagnelf@...dia.com>, <jhubbard@...dia.com>, <zhiwang@...nel.org>,
 <daniel.almeida@...labora.com>
Subject: Re: [PATCH v12 3/5] rust: io: factor out MMIO read/write macros

On Thu Jan 22, 2026 at 5:22 AM JST, Zhi Wang wrote:
> Refactor the existing MMIO accessors to use common call macros
> instead of inlining the bindings calls in each `define_{read,write}!`
> expansion.
>
> This factoring separates the common offset/bounds checks from the
> low-level call pattern, making it easier to add additional I/O accessor
> families.
>
> No functional change intended.
>
> Cc: Alexandre Courbot <acourbot@...dia.com>
> Signed-off-by: Zhi Wang <zhiw@...dia.com>

I still want to eventually switch to a trait hierarchy that removes the
need for these intricate macros, but that's a few more step ahead. For
now this integrates well with the current design.

Reviewed-by: Alexandre Courbot <acourbot@...dia.com>