RE: [PATCH 1/2] vfio: Remove the vfio_group->users and users_comp

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Jason Gunthorpe <jgg@xxxxxxxxxx>
> Sent: Thursday, September 29, 2022 10:59 PM
> 
> Kevin points out that the users is really just tracking if
> group->opened_file is set, so we can simplify this code to a wait_queue
> that looks for !opened_file under the group_rwsem.
> 
> Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>