Matthew Wilcox [off-list ref] writes:

The rust code is alredy coming though ...

rust/kernel/buffer.rs:/// A pre-allocated buffer that implements [`core::fmt::Write`].

so now we have three formats.  Markdown and RST are _very_ similar, but
not identical [1].  Oh, and even better we now have three distinct tools --
kerneldoc, rustdoc and sphinx.  Have the rust people reached out to you
about integrating the various docs?

I have talked with them a bit, yes, but without any clear conclusions at
this point.  The Rust world has its own way of doing things with regard
to documentation, and I don't want to tell them they can't use it in the
kernel context.  So I think there's going to be a certain amount of
groping around for the best solution.

We did come to the mutual agreement that teaching kernel-doc to parse
Rust code as well was not an ideal solution.  Probably there will be
some sort of tool to translate between rustdoc and our sphinx setup.
Beyond that, we'll see how it goes.

jon