With sufficient many pages to map gntdev can reach order 9 allocation
sizes. As there is no need to have physically contiguous buffers switch
to kvcalloc() in order to avoid failing allocations.
Signed-off-by: NJuergen Gross <jgross@suse.com>
Reviewed-by: NOleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Reviewed-by: NBoris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: NJuergen Gross <jgross@suse.com>