userfaultfd_open 882 tools/testing/selftests/vm/userfaultfd.c if (userfaultfd_open(0) < 0) userfaultfd_open 925 tools/testing/selftests/vm/userfaultfd.c if (userfaultfd_open(features) < 0) userfaultfd_open 984 tools/testing/selftests/vm/userfaultfd.c if (userfaultfd_open(features) < 0) userfaultfd_open 1050 tools/testing/selftests/vm/userfaultfd.c if (userfaultfd_open(0) < 0)