81 	int r;  in handle_uffd_page_request()  local
92 	r = ioctl(uffd, UFFDIO_COPY, &copy);  in handle_uffd_page_request()
93 	if (r == -1) {  in handle_uffd_page_request()
96 		return r;  in handle_uffd_page_request()
132 		int r;  in uffd_handler_thread_fn()  local
140 		r = poll(pollfd, 2, -1);  in uffd_handler_thread_fn()
141 		switch (r) {  in uffd_handler_thread_fn()
150 			pr_info("Polling uffd returned %d", r);  in uffd_handler_thread_fn()
160 			r = read(pollfd[1].fd, &tmp_chr, 1);  in uffd_handler_thread_fn()
161 			TEST_ASSERT(r == 1,  in uffd_handler_thread_fn()
169 		r = read(uffd, &msg, sizeof(msg));  in uffd_handler_thread_fn()
170 		if (r == -1) {  in uffd_handler_thread_fn()
177 		if (r != sizeof(msg)) {  in uffd_handler_thread_fn()
178 			pr_info("Read on uffd returned unexpected size: %d bytes", r);  in uffd_handler_thread_fn()
188 		r = handle_uffd_page_request(uffd, addr);  in uffd_handler_thread_fn()
189 		if (r < 0)  in uffd_handler_thread_fn()
262 	int r;  in run_test()  local
304 			r = pipe2(&pipefds[vcpu_id * 2],  in run_test()
306 			TEST_ASSERT(!r, "Failed to set up pipefd");  in run_test()
308 			r = setup_demand_paging(vm,  in run_test()
313 			if (r < 0)  in run_test()
314 				exit(-r);  in run_test()
347 			r = write(pipefds[vcpu_id * 2 + 1], &c, 1);  in run_test()
348 			TEST_ASSERT(r == 1, "Unable to write to pipefd");  in run_test()