5.0-current kernel (May 4) devfs not picking up slices from

[walt]

Mark Blackman wrote:
> Hi,
> 
> Just started following the instructions in /usr/src/UPDATING to
> go from 4-STABLE to 5-CURRENT and got stuck when booting the
> new kernel (a GENERIC kernel). Note that as per instructions,
> userland is still 4-STABLE at this point.
> 
> This GENERIC kernel is from about 2300GMT May 3, so fairly up-to-date
> with an ATA disk.
> 
> When booting, it claims
> 
> 'Root mount failed: 22'

Ouch, you picked just the wrong moment to update  :-(

If you can, try to update your sources again and make a
new kernel.  The problem was just fixed a short while ago,
in a temporary sort of way.  It most likely will be changing
again shortly, so beware.  Mysterious errors are not your
necessarily your fault (except when they are).