This bug was fixed in the package flashcache - 3.1.3+git20150701-5ubuntu1
--------------- flashcache (3.1.3+git20150701-5ubuntu1) artful; urgency=medium
* Initialize bi_op_flags in dm_io_request structures (LP: #1714185). * Fix DKMS compile for 4.13+ kernels (LP: #1706426).
-- Stefan Bader <email address hidden> Wed, 30 Aug 2017 16:49:59 +0200
This bug was fixed in the package flashcache - 3.1.3+git201507 01-5ubuntu1
--------------- git20150701- 5ubuntu1) artful; urgency=medium
flashcache (3.1.3+
* Initialize bi_op_flags in dm_io_request structures (LP: #1714185).
* Fix DKMS compile for 4.13+ kernels (LP: #1706426).
-- Stefan Bader <email address hidden> Wed, 30 Aug 2017 16:49:59 +0200