selftests/mm/hmm-tests.c

537 	int child_fd;
586 	child_fd = hmm_open(0);
587 	ASSERT_GE(child_fd, 0);
590 	ret = hmm_dmirror_cmd(child_fd, HMM_DMIRROR_WRITE, buffer, npages);
599 	close(child_fd);
615 	int child_fd;
664 	child_fd = hmm_open(0);
665 	ASSERT_GE(child_fd, 0);
668 	ret = hmm_dmirror_cmd(child_fd, HMM_DMIRROR_WRITE, buffer, npages);
677 	close(child_fd);