[$] A process for handling Rust code in the core kernel

The 2024 Linux Storage, Filesystem, Memory-Management, and BPF Summit
included a tense session on the use of Rust
code in the kernel's filesystem layer. The Rust topic returned in 2025 in
a session run by Andreas Hindborg, with a scope that also covered the
storage and memory-management layers. A lot of progress has been made, and
the discussion was less adversarial this year, but there are still process
issues that need to be worked out.