linux-kernel - Re: [PATCH 00/18] `syn` support

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Message-Id: <DE56F8M2XC29.2U6TIDNJ0U6DZ@kernel.org>
Date: Mon, 10 Nov 2025 18:04:48 +0100
From: "Benno Lossin" <lossin@...nel.org>
To: "Miguel Ojeda" <miguel.ojeda.sandonis@...il.com>, "Jonathan Corbet"
 <corbet@....net>
Cc: "Miguel Ojeda" <ojeda@...nel.org>, "Alex Gaynor"
 <alex.gaynor@...il.com>, "Nathan Chancellor" <nathan@...nel.org>, "Nicolas
 Schier" <nicolas@...sle.eu>, "Boqun Feng" <boqun.feng@...il.com>, "Gary
 Guo" <gary@...yguo.net>, Björn Roy Baron
 <bjorn3_gh@...tonmail.com>, "Andreas Hindborg" <a.hindborg@...nel.org>,
 "Alice Ryhl" <aliceryhl@...gle.com>, "Trevor Gross" <tmgross@...ch.edu>,
 "Danilo Krummrich" <dakr@...nel.org>, <rust-for-linux@...r.kernel.org>,
 <linux-kbuild@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <patches@...ts.linux.dev>
Subject: Re: [PATCH 00/18] `syn` support

On Mon Nov 10, 2025 at 5:27 PM CET, Miguel Ojeda wrote:
> On Mon, Nov 10, 2025 at 4:59 PM Jonathan Corbet <corbet@....net> wrote:
>>
>> Just in case I'm not the only ignorant person who didn't immediately
>> know what "syn" is and why we might want 57,000 lines of it in the
>> kernel... :)
>
> Thanks -- I will add something like that.
>
> It has been such a long and recurrent topic in our discussions that I
> guess I was writing from inside the Rust for Linux's bubble.
>
> Just to give a bit more context, it is the most downloaded Rust crate
> (according to crates.io). It (or something like it) is essentially a
> necessity for writing complex macros without too much pain.

It also is used by the Rust compiler itself for some proc-macros of
their own.

Cheers,
Benno