vma_check_userptr
err = vma_check_userptr(vm, op->map.vma, pt_update);
err = vma_check_userptr(vm, op->remap.prev, pt_update);
err = vma_check_userptr(vm, op->remap.next, pt_update);
err = vma_check_userptr(vm, gpuva_to_vma(op->base.prefetch.va), pt_update);