102 static int uffd_flags, finished, *pipefd;  variable
489 	if (pipefd) {  in uffd_test_ctx_clear()
491 			if (close(pipefd[i]))  in uffd_test_ctx_clear()
494 		free(pipefd);  in uffd_test_ctx_clear()
495 		pipefd = NULL;  in uffd_test_ctx_clear()
565 	pipefd = malloc(sizeof(int) * nr_cpus * 2);  in uffd_test_ctx_init()
566 	if (!pipefd)  in uffd_test_ctx_init()
569 		if (pipe2(&pipefd[cpu * 2], O_CLOEXEC | O_NONBLOCK))  in uffd_test_ctx_init()
821 	pollfd[1].fd = pipefd[cpu*2];  in uffd_poll_thread()
971 			if (write(pipefd[cpu*2+1], &c, 1) != 1)  in stress()
1244 	if (write(pipefd[1], &c, sizeof(c)) != sizeof(c))  in userfaultfd_events_test()
1301 	if (write(pipefd[1], &c, sizeof(c)) != sizeof(c))  in userfaultfd_sig_test()
1377 	if (write(pipefd[1], &c, sizeof(c)) != sizeof(c))  in userfaultfd_minor_test()