GNTCOPY_source_gref
.flags = GNTCOPY_source_gref
.flags = GNTCOPY_source_gref
cop->flags = GNTCOPY_source_gref;
op->flags |= GNTCOPY_source_gref;
if (!(seg->flags & (GNTCOPY_source_gref | GNTCOPY_dest_gref)))
if (seg->flags & GNTCOPY_source_gref) {
if (seg->flags & GNTCOPY_source_gref) {
op->flags |= GNTCOPY_source_gref;