linux-kernel - Re: [PATCH v10 2/5] rust: io: separate generic I/O helpers from MMIO implementation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <DFTC434Z6XRK.2RTE2DFC16TDA@kernel.org>
Date: Tue, 20 Jan 2026 11:12:18 +0100
From: "Danilo Krummrich" <dakr@...nel.org>
To: "Alice Ryhl" <aliceryhl@...gle.com>
Cc: "Zhi Wang" <zhiw@...dia.com>, <rust-for-linux@...r.kernel.org>,
 <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <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>,
 <acourbot@...dia.com>, <joelagnelf@...dia.com>, <jhubbard@...dia.com>,
 <zhiwang@...nel.org>, <daniel.almeida@...labora.com>
Subject: Re: [PATCH v10 2/5] rust: io: separate generic I/O helpers from
 MMIO implementation

On Tue Jan 20, 2026 at 9:04 AM CET, Alice Ryhl wrote:
> On Mon, Jan 19, 2026 at 10:22:44PM +0200, Zhi Wang wrote:
> Overall looks good to me. Some comments below:
>
> I still think it would make sense to have `IoCapable<T>: IoTryCapable<T>`,
> but it's not a big deal.

I think with this approach it's not necessary to have this requirement. In
practice, most impls will have both, but I think it's a good thing that we don't
have to have an impl even if not used by any driver, i.e. it helps avoiding dead
code.

>> +    /// Infallible 64-bit read with compile-time bounds check.
>> +    #[cfg(CONFIG_64BIT)]
>> +    fn read64(&self, offset: usize) -> u64
>> +    #[cfg(CONFIG_64BIT)]
>> +    fn try_read64(&self, offset: usize) -> Result<u64>
>
> These don't really need cfg(CONFIG_64BIT). You can place that cfg on
> impl blocks of IoCapable<u64>.

If you agree with the above, I can fix this up when applying the series.