uffd_test_skip
uffd_test_skip("Too less pages for POISON test");
uffd_test_skip("cannot open userfaultfd handle");
uffd_test_skip("huge page size is 0, feature missing?");
uffd_test_skip("feature missing");
uffd_test_skip(errmsg);
uffd_test_skip("Possibly CONFIG_GUP_TEST missing "
uffd_test_skip("MADV_COLLAPSE failed");