[PATCH V9 5/9] nvmet: add bio get helper for different backends

[Chaitanya Kulkarni]

On 1/11/21 23:33, Christoph Hellwig wrote:
> I'm not a huge fan of this helper, especially as it sets an end_io
> callback only for the allocated case, which is a weird calling
> convention.
>

The patch has a right documentation and that end_io is needed
for passthru case. To get rid of the weirdness I can remove
passthru case and make itend_io assign to inline and non-inline bio
to make it non-weired.

Since this eliminates exactly identical lines of the code in atleast two
backend which we should try to use the helper in non-wried way.