101 static int uffd = -1;  variable
456 		uffd = __userfaultfd_open_dev();  in userfaultfd_open()
458 		uffd = syscall(__NR_userfaultfd, UFFD_FLAGS);  in userfaultfd_open()
459 		if (uffd < 0)  in userfaultfd_open()
463 	uffd_flags = fcntl(uffd, F_GETFD, NULL);  in userfaultfd_open()
467 	if (ioctl(uffd, UFFDIO_API, &uffdio_api))  in userfaultfd_open()
503 	if (uffd != -1) {  in uffd_test_ctx_clear()
504 		if (close(uffd))  in uffd_test_ctx_clear()
506 		uffd = -1;  in uffd_test_ctx_clear()
726 	int ret = read(uffd, msg, sizeof(*msg));  in uffd_read_msg()
751 		wp_range(uffd, msg->arg.pagefault.address, page_size, false);  in uffd_handle_page_fault()
774 		continue_range(uffd, msg->arg.pagefault.address, page_size);  in uffd_handle_page_fault()
804 		if (copy_page(uffd, offset))  in uffd_handle_page_fault()
819 	pollfd[0].fd = uffd;  in uffd_poll_thread()
838 		if (uffd_read_msg(uffd, &msg))  in uffd_poll_thread()
848 			close(uffd);  in uffd_poll_thread()
849 			uffd = msg.arg.fork.ufd;  in uffd_poll_thread()
850 			pollfd[0].fd = uffd;  in uffd_poll_thread()
856 			if (ioctl(uffd, UFFDIO_UNREGISTER, &uffd_reg.range))  in uffd_poll_thread()
880 		if (uffd_read_msg(uffd, &msg))  in uffd_read_thread()
899 		copy_page_retry(uffd, page_nr * page_size);  in background_thread()
907 		wp_range(uffd, (unsigned long)area_dst + start_nr * page_size,  in background_thread()
915 		copy_page_retry(uffd, page_nr * page_size);  in background_thread()
1054 						if (copy_page(uffd, offset))  in faulting_process()
1059 						wp_range(uffd,  in faulting_process()
1188 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))  in userfaultfd_zeropage_test()
1194 	if (uffdio_zeropage(uffd, 0))  in userfaultfd_zeropage_test()
1218 	fcntl(uffd, F_SETFL, uffd_flags | O_NONBLOCK);  in userfaultfd_events_test()
1225 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))  in userfaultfd_events_test()
1270 	fcntl(uffd, F_SETFL, uffd_flags | O_NONBLOCK);  in userfaultfd_sig_test()
1277 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))  in userfaultfd_sig_test()
1351 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))  in userfaultfd_minor_test()
1496 	if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))  in userfaultfd_pagemap_test()
1503 	wp_range(uffd, (uint64_t)area_dst, test_pgsize, true);  in userfaultfd_pagemap_test()
1525 	wp_range(uffd, (uint64_t)area_dst, page_size, false);  in userfaultfd_pagemap_test()
1573 			fcntl(uffd, F_SETFL, uffd_flags | O_NONBLOCK);  in userfaultfd_stress()
1575 			fcntl(uffd, F_SETFL, uffd_flags & ~O_NONBLOCK);  in userfaultfd_stress()
1583 		if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))  in userfaultfd_stress()
1591 			if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))  in userfaultfd_stress()
1629 			wp_range(uffd, (unsigned long)area_dst,  in userfaultfd_stress()
1633 		if (ioctl(uffd, UFFDIO_UNREGISTER, &uffdio_register.range))  in userfaultfd_stress()
1637 			if (ioctl(uffd, UFFDIO_UNREGISTER,  in userfaultfd_stress()
1773 	close(uffd);  in parse_test_type_arg()
1774 	uffd = -1;  in parse_test_type_arg()