The return of devfs

In particular, it seems odd to me to call something "*fs" when it is not, in fact, a filesystem. This seems to be the kernel mounting a filesystem and creating some device nodes on it. Surely this is better than the hack currently used to parse the "root=/dev/sda1" option, which takes something that looks like a path and comes up with a dev_t without anything resembling a filesystem lookup, and therefore has nothing to do with anything that could be seen by userspace.