On Tue, Apr 16, 2019 at 10:19:47PM +0200, Arnd Bergmann wrote:
> Each of these drivers has a copy of the same trivial helper function to
> convert the pointer argument and then call the native ioctl handler.
> 
> We now have a generic implementation of that, so use it.
> 
> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/char/ppdev.c              | 12 +---------
>  drivers/char/tpm/tpm_vtpm_proxy.c | 12 +---------
>  drivers/firewire/core-cdev.c      | 12 +---------
>  drivers/hid/usbhid/hiddev.c       | 11 +--------
>  drivers/hwtracing/stm/core.c      | 12 +---------
>  drivers/misc/mei/main.c           | 22 +----------------
>  drivers/mtd/ubi/cdev.c            | 36 +++-------------------------
>  drivers/net/tap.c                 | 12 +---------
>  drivers/staging/pi433/pi433_if.c  | 12 +---------
>  drivers/usb/core/devio.c          | 16 +------------
>  drivers/vfio/vfio.c               | 39 +++----------------------------
>  drivers/vhost/net.c               | 12 +---------
>  drivers/vhost/scsi.c              | 12 +---------
>  drivers/vhost/test.c              | 12 +---------
>  drivers/vhost/vsock.c             | 12 +---------
>  fs/fat/file.c                     | 13 +----------
>  16 files changed, 20 insertions(+), 237 deletions(-)

The vhost parts look good:

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>