apt-get update & upgrade => zfsonlinux broken

[dpchrist@holgerdanske.com]

debian-user:

This morning, I did:

    # apt-get update
    # apt-get upgrade


After rebooting, my ZFS on Linux pool and file systems no longer work:

    # zpool list
    no pools available

    # zfs list
    no datasets available


I believe the ZFS kernel module is loaded:

    # dmesg | grep -i zfs
    [   30.541398] ZFS: Loaded module v0.6.3-763_ge883253, ZFS pool
version 5000, ZFS filesystem version 5


I have a single ZFS pool that uses two disks in a mirror, and they appear
to be working:

    # l /dev/mapper/ST*
    /dev/mapper/ST3000DM001-9YN_S1F042HH_crypt@
    /dev/mapper/ST3000DM001_1CH_W1F1R3VC_crypt@


Any suggestions?

TIA,

David