I am also affected by this. I did simple apt update and apt upgrade and now I can't use my zfs volume anymore.
- Bug#1012600: zfs-dkms: Compilation fails. ZFS c... Mauro Condarelli
- Bug#1012600: Further info mc5686
- Bug#1012600: Further info Holger Schröder
- Bug#1012600: Upvote Jonas Lippuner
- Bug#1012600: Matt Barry
- Bug#1012600: Chris Putnam
- Bug#1012600: Kevin P. Fleming
- Bug#1012600: [Pkg-zfsonlinux-devel] Bu... Richard Laager
- Bug#1012600: marked as done (zfs-dkms: Com... Debian Bug Tracking System
- Bug#1012600: fixed in zfs-linux 2.1.5-1 yahg
- Bug#1012600: Kevin P. Fleming