The good news is this doesn't affect drm/asahi, our GPU driver. The bad news is it does affect all the other drivers we're (re)writing in Rust, two so far with a third one coming.
Personally, I would consider this grounds for removal of Christoph from the Linux project on Code of Conduct violation grounds, but sadly I doubt much will happen other than draining a lot of people's energy and will to continue the project until Linus says "fuck you" or something.
As for how to move forward, if I were one of the Rust maintainers, I would just merge the patch (which does not touch code formally maintained by the dissenter). Either Linus takes the pull, and whatever Christoph says is irrelevant, or he doesn't, and R4L dies. Everything else is a waste of everyone's time and energy.
The original entry from the mailing list this is all about:
On Wed, Jan 29, 2025 at 10:33:22PM +0100, Danilo Krummrich wrote:
I accept that you don't want to be involved with Rust in the kernel, which is
why we offered to maintain the Rust abstraction layer for the DMA coherent
allocator as a separate component (which it would be anyways) ourselves.
Which doesn't help me a bit. Every additional bit that the another
language creeps in drastically reduces the maintainability of the kernel
as an integrated project. The only reason Linux managed to survive so
long is by not having internal boundaries, and adding another language
complely breaks this. You might not like my answer, but I will do
everything I can do to stop this. This is NOT because I hate Rust.
While not my favourite language it's definitively one of the best new
ones and I encourage people to use it for new projects where it fits.I do not want it anywhere near a huge C code base that I need to
maintain.