tree 7f77cc1bb97457d10d92df83a640d8d90023a653
parent f26c5719b2d7b00de69eb83eb1c1c831759fdc9b
author Dan Williams <dan.j.williams@intel.com> 1492029464 -0700
committer Dan Williams <dan.j.williams@intel.com> 1493151636 -0700

dm: teach dm-targets to use a dax_device + dax_operations

Arrange for dm to lookup the dax services available from member devices.
Update the dax-capable targets, linear and stripe, to route dax
operations to the underlying device. Changes the target-internal
->direct_access() method to more closely align with the dax_operations
->direct_access() calling convention.

Cc: Toshi Kani <toshi.kani@hpe.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>