faulting_process 950 tools/testing/selftests/vm/userfaultfd.c return faulting_process(0); faulting_process 1001 tools/testing/selftests/vm/userfaultfd.c if (faulting_process(1)) faulting_process 1015 tools/testing/selftests/vm/userfaultfd.c exit(faulting_process(2));