[PATCH 12/17] nvme: enable bio-cache for fixed-buffer passthru

[Christoph Hellwig]

On Tue, Mar 08, 2022 at 08:51:00PM +0530, Kanchan Joshi wrote:
> Since we do submission/completion in task, we can have this up.
> Add a bio-set for nvme as we need that for bio-cache.

Well, passthrough I/O should just use kmalloced bios anyway, as there
is no need for the mempool to start with.  Take a look at the existing
code in blk-map.c.