linux-kernel - Re: [PATCH 1/2] gpu: nova-core: add initial driver stub

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: <Z6Jgf-cVt_AlM6Qd@cassiopeiae>
Date: Tue, 4 Feb 2025 19:46:23 +0100
From: Danilo Krummrich <dakr@...nel.org>
To: Joel Fernandes <joel@...lfernandes.org>
Cc: airlied@...il.com, simona@...ll.ch, corbet@....net,
	maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
	tzimmermann@...e.de, ajanulgu@...hat.com, lyude@...hat.com,
	pstanner@...hat.com, zhiw@...dia.com, cjia@...dia.com,
	jhubbard@...dia.com, bskeggs@...dia.com, acurrid@...dia.com,
	ojeda@...nel.org, alex.gaynor@...il.com, boqun.feng@...il.com,
	gary@...yguo.net, bjorn3_gh@...tonmail.com, benno.lossin@...ton.me,
	a.hindborg@...nel.org, aliceryhl@...gle.com, tmgross@...ch.edu,
	dri-devel@...ts.freedesktop.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, nouveau@...ts.freedesktop.org,
	rust-for-linux@...r.kernel.org, joelagnelf@...dia.com
Subject: Re: [PATCH 1/2] gpu: nova-core: add initial driver stub

On Mon, Feb 03, 2025 at 03:24:10PM -0500, Joel Fernandes wrote:
> Hi Danilo,
> 
> On Fri, Jan 31, 2025 at 11:04:24PM +0100, Danilo Krummrich wrote:
> > +#[pin_data]
> > +pub(crate) struct NovaCore {
> > +    #[pin]
> > +    pub(crate) gpu: Gpu,
> > +}
> 
> I am curious what is the need for pinning here in the patch in its current
> form, is it for future-proofing?

Yes, it is.

It's not always needed, but since I know that further down the road we'll need
at least a few mutexes, it seemed reasonable to already consider it.

> 
> I looked through the sample PCI driver example you had posted and did not see
> pinning there [1]. Thanks for the clarification.
> [1] https://lore.kernel.org/all/20241219170425.12036-12-dakr@kernel.org/