[$] On Rust in enterprise kernels

At the recently concluded Maintainers Summit, it was generally agreed that the Rust experiment would
continue, and that the path was clear for more Rust code to enter the
kernel. But the high-level view taken at such gatherings cannot always
account for the difficult details that will inevitably arise as the Rust
work proceeds. A recent discussion on the nouveau mailing list may have
escaped the notice of many, but it highlights some of the problems that
will have to be worked out as important functionality written in Rust heads
toward the mainline.