9.1-RC2: clang can no longer build a kernel that boots

[Mike Cui]

I'm seeing that on 9.1-RC2 (i386), clang can no longer build a kernel
that boots. Any kernel I build would get stuck at "Timecounters tick
every 1.000 msec". However, building the same kernel with gcc has no
problems. Also, if I build the kernel with clang from 9.0-RELEASE, it
also works fine. I tried this with both my custom kernel config as
well as GENERIC, and I'm seeing the same thing.

Anyone else seeing this?