[Virtio-fs] support booting of arbitrary non-blockdevice file systems v2

[Vivek Goyal]

On Mon, Jun 21, 2021 at 08:26:55AM +0200, Christoph Hellwig wrote:
> Hi all,
> 
> this series adds support to boot off arbitrary non-blockdevice root file
> systems, based off an earlier patch from Vivek.
> 
> Chances since v1:
>  - don't try to mount every registered file system if none is specified
>  - fix various null pointer dereferences when certain kernel paramters are
>    not set
>  - general refactoring.

Thanks Christoph. This version looks good to me. I tested both with
virtiofs and 9p and it works for me.

Reviewed-by: Vivek Goyal <vgoyal at redhat.com>

Thanks
Vivek