[Drbd-dev] remove REQ_OP_WRITE_SAME v2

[Chaitanya Kulkarni]

On 2/9/22 12:28 AM, Christoph Hellwig wrote:
> 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 since v2:
>   - split up
>   - rebased ontop of five years of kernel change, including the totally
>     pointless addition of REQ_OP_WRITE_SAME in rnbd
> 

Thanks a lot for doing this, much less code to test and review in
blk-lib.c now ...

-ck