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From: Andreas Hindborg <nmi@metaspace.dk>
To: Daniel Wagner <wagi@kernel.org>
Cc: Boqun Feng <abstractionfbq@gmail.com>,
	"rust-for-linux@vger.kernel.org" <rust-for-linux@vger.kernel.org>
Subject: ABI stability and Rust
Date: Wed, 02 Apr 2025 18:44:10 +0000	[thread overview]
Message-ID: <87iknmv1xs.fsf@metaspace.dk> (raw)

Hi Daniel,

I just wanted to mention that we discussed ABI stability in our
bi-weekly rust subsystem meeting today [1].

Two solutions were discussed:

a) Ship a blessed toolchain for each kernel image you ship. Users
   building out-of-tree modules must use this toolchain.

b) If users cannot use the blessed toolchain, they must link all rust
   code into their module and ensure no rust symbols in vmlinux are called.

Outside of those options, I don't think there are any other solutions. I
would not hedge my bets on rustc getting ABI stability, ever.


Best regards,
Andreas Hindborg



[1] https://hackmd.io/PbZOPV1HTwe0hjZTlDGnmA?view#ABI-compatibility-for-Rust



             reply	other threads:[~2025-04-02 18:44 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-04-02 18:44 Andreas Hindborg [this message]
2025-04-02 19:00 ` ABI stability and Rust Miguel Ojeda
2025-04-07 11:17   ` Daniel Wagner
2025-04-02 19:12 ` Greg KH
2025-04-07 11:23   ` Daniel Wagner

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