From: Alice Ryhl <aliceryhl@google.com>
To: Sami Tolvanen <samitolvanen@google.com>
Cc: "Alice Ryhl" <aliceryhl@google.com>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Boqun Feng" <boqun@kernel.org>, "Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <lossin@kernel.org>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Trevor Gross" <tmgross@umich.edu>,
"Danilo Krummrich" <dakr@kernel.org>,
"Daniel Almeida" <daniel.almeida@collabora.com>,
"Tamir Duberstein" <tamird@kernel.org>,
"Alexandre Courbot" <acourbot@nvidia.com>,
"Onur Özkan" <work@onurozkan.dev>,
"FUJITA Tomonori" <fujita.tomonori@gmail.com>,
"Frederic Weisbecker" <frederic@kernel.org>,
"Lyude Paul" <lyude@redhat.com>,
"Thomas Gleixner" <tglx@kernel.org>,
"Anna-Maria Behnsen" <anna-maria@linutronix.de>,
"John Stultz" <jstultz@google.com>,
"Stephen Boyd" <sboyd@kernel.org>,
"Abdiel Janulgue" <abdiel.janulgue@gmail.com>,
"Robin Murphy" <robin.murphy@arm.com>,
rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
driver-core@lists.linux.dev, stable@vger.kernel.org
Subject: Re: [PATCH 3/3] rust: dma: declare cfi_encoding for dma_data_direction
Date: Tue, 20 Oct 2026 08:13:06 +0000 [thread overview]
Message-ID: <20261020081308.1768290-1-aliceryhl@google.com> (raw)
In-Reply-To: <20261019-rust-cfi-fixes-v1-3-9503472ba738@google.com>
On Mon, Oct 19, 2026 at 11:34:39PM +0000, Sami Tolvanen wrote:
> bindgen generates bindings::dma_data_direction as an integer by default,
> while C callback tables such as dma_buf_ops declare the parameter as
> enum dma_data_direction. kCFI encodes enum types by name even with
> integer normalization, so the type ids would not match when C calls into
> a Rust callback taking bindings::dma_data_direction.
>
> Generate dma_data_direction as a newtype with a cfi_encoding, as is done
> for lru_status, and convert DataDirection through the newtype's
> constants.
>
> Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Perhaps also add:
Cc: stable@vger.kernel.org
Fixes: c2437c43cfb1 ("rust: dma: implement DataDirection")
so this gets tracked alongside patches 1 and 2 for `6.18.y` backports.
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
next prev parent reply other threads:[~2026-10-20 8:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-19 23:34 [PATCH 0/3] rust: Fix CFI type mismatches Sami Tolvanen
2026-10-19 23:34 ` [PATCH 1/3] rust: irq: declare cfi_encoding for irqreturn Sami Tolvanen
2026-10-20 8:12 ` Alice Ryhl
2026-10-19 23:34 ` [PATCH 2/3] rust: hrtimer: declare cfi_encoding for hrtimer_restart Sami Tolvanen
2026-10-20 8:12 ` Alice Ryhl
2026-10-20 12:50 ` FUJITA Tomonori
2026-10-19 23:34 ` [PATCH 3/3] rust: dma: declare cfi_encoding for dma_data_direction Sami Tolvanen
2026-10-20 8:13 ` Alice Ryhl [this message]
2026-10-20 10:51 ` [PATCH 0/3] rust: Fix CFI type mismatches Miguel Ojeda
2026-10-20 11:58 ` Gary Guo
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