userfaultfd: UFFDIO_REMAP uABI

This implements the uABI of UFFDIO_REMAP.

Notably one mode bitflag is also forwarded (and in turn known) by the
lowlevel remap_pages method.

Acked-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
1 file changed