[$] How to write Rust in the kernel: part 2

In 2023, Fujita Tomonori

wrote a Rust version of the existing driver for the
Asix AX88796B embedded Ethernet controller. At slightly more than 100 lines,
it's about as simple as a driver can be, and therefore is a useful touchstone for
the differences between writing Rust and C in the kernel. Looking at the Rust
syntax, types, and APIs used by the driver and contrasting them with the C
version will help illustrate those differences.