Now that we are using REQ_OP_WRITE_ZEROES for all zeroing needs in the
kernel there is very little use left for REQ_OP_WRITE_SAME. We only
have two callers left, and both just export optional protocol features
to remote systems: DRBD and the target code.
For the target code the only real use case was zeroing offload, which
is kept with this series, and for DRBD I suspect the same based on the
usage.
git://git.infradead.org/users/hch/block.git delete-write-same
Gitweb:
http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/delete-write-same
Changes from RFC:
- add zeroing offload for the SCSI target.
