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From: Andreas Hindborg <a.hindborg@kernel.org>
To: Wenzhao Liao <wenzhaoliao@ruc.edu.cn>, Jens Axboe <axboe@kernel.dk>,
 Miguel Ojeda <ojeda@kernel.org>, linux-block@vger.kernel.org,
 rust-for-linux@vger.kernel.org
Cc: Boqun Feng <boqun@kernel.org>, Gary Guo <gary@garyguo.net>,
 =?utf-8?Q?Bj=C3=B6rn?= Roy
 Baron <bjorn3_gh@protonmail.com>, Benno Lossin <lossin@kernel.org>, Alice
 Ryhl <aliceryhl@google.com>, Trevor Gross <tmgross@umich.edu>, Danilo
 Krummrich <dakr@kernel.org>, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 0/2] rust: block: safely abstract the blk-mq poll
 callback
In-Reply-To: <20260410191544.2203201-1-wenzhaoliao@ruc.edu.cn>
References: <34Y9hHd4E8CdmCmv6LKr2tXYoUyzhgpwOGgK88jxj_B5UHGX-NM-7g0Wr3PXLWBlF0lzMM8lcS_LHtoQAGVn7g==@protonmail.internalid>
 <20260410191544.2203201-1-wenzhaoliao@ruc.edu.cn>
Date: Sat, 11 Apr 2026 12:33:38 +0200
Message-ID: <87ik9xwzul.fsf@kernel.org>
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"Wenzhao Liao" <wenzhaoliao@ruc.edu.cn> writes:

> Rust blk-mq drivers currently cannot implement the `blk_mq_ops->poll`
> callback: the Rust vtable hardcodes `poll: None`, and there is no safe
> way for a driver to receive the borrowed hardware queue context or the
> optional completion batch pointer that blk-mq passes to C drivers.

Again, this is covered by the series at [1]. Please instruct your AI agent
to read that thread before submitting more patches.

Best regards,
Andreas Hindborg


[1] https://lore.kernel.org/rust-for-linux/20260216-rnull-v6-19-rc5-send-v1-0-de9a7af4b469@kernel.org/