linux-kernel - Re: [RFC 0/2] rust: introduce abstractions for fwctl

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Message-ID: <20251030175412.GT1018328@nvidia.com>
Date: Thu, 30 Oct 2025 14:54:12 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Danilo Krummrich <dakr@...nel.org>
Cc: Zhi Wang <zhiw@...dia.com>,
	"rust-for-linux@...r.kernel.org" <rust-for-linux@...r.kernel.org>,
	"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
	"kwilczynski@...nel.org" <kwilczynski@...nel.org>,
	"ojeda@...nel.org" <ojeda@...nel.org>,
	"alex.gaynor@...il.com" <alex.gaynor@...il.com>,
	"boqun.feng@...il.com" <boqun.feng@...il.com>,
	"gary@...yguo.net" <gary@...yguo.net>,
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	"lossin@...nel.org" <lossin@...nel.org>,
	"a.hindborg@...nel.org" <a.hindborg@...nel.org>,
	"aliceryhl@...gle.com" <aliceryhl@...gle.com>,
	"tmgross@...ch.edu" <tmgross@...ch.edu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Neo Jia <cjia@...dia.com>, Surath Mitra <smitra@...dia.com>,
	Ankit Agrawal <ankita@...dia.com>,
	Aniket Agashe <aniketa@...dia.com>,
	Kirti Wankhede <kwankhede@...dia.com>,
	"Tarun Gupta (SW-GPU)" <targupta@...dia.com>,
	"zhiwang@...nel.org" <zhiwang@...nel.org>,
	Alex Williamson <alwilliamson@...dia.com>,
	Alexandre Courbot <acourbot@...dia.com>,
	Joel Fernandes <joelagnelf@...dia.com>,
	John Hubbard <jhubbard@...dia.com>
Subject: Re: [RFC 0/2] rust: introduce abstractions for fwctl

On Thu, Oct 30, 2025 at 06:52:31PM +0100, Danilo Krummrich wrote:
>   (1) I think if there'd be a change it would be to kvmalloc() and calling
>       kvfree() on a kmalloc() buffer should be fine.

Yes

>   (2) A breaking change would also affect all C drivers, so it'd not only be the
>       Rust code being affected.

Yes

Jason