anyhow is for careless error propagation, where you know you won't do elaborate handling and just bubble it up to the user. It's suitable for (some) applications, but not for libraries, and a kernel falls on the "library" side of that divide. Errors should be handled by the kernel itself or reported carefully to userspace. anyhow is not built for that. (It also puts its errors on the heap—what do you do if memory allocation fails when reporting an error?)

Linux has its own UUID infrastructure, so it seems weird to pull in a whole parallel implementation. At the very least you'd want to disable all the generation code, and it's unclear to me if the uuid crate supports that.

rand is large. Does Linux need all the probability distributions it supports? (ripgrepping for "Bernoulli" only turns up the name of a floppy disk system, so probably not.) Doesn't it already have an implementation for the ones it does need?