On Mon, Jun 17, 2019 at 5:28 AM Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org> wrote:
>
> The functionality is identical to the one currently open coded in
> device-dax.
>
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
>  drivers/dax/dax-private.h |  4 ----
>  drivers/dax/device.c      | 43 ---------------------------------------
>  2 files changed, 47 deletions(-)

This needs the mock devm_memremap_pages() to setup the common
percpu_ref. Incremental patch attached: