test_statmount_string
test_statmount_string(STATMOUNT_MNT_ROOT, str_off(mnt_root), "mount root");
test_statmount_string(STATMOUNT_MNT_POINT, str_off(mnt_point), "mount point");
test_statmount_string(STATMOUNT_FS_TYPE, str_off(fs_type), "fs type");
test_statmount_string(all_mask, str_off(mnt_root), "mount root & all");
test_statmount_string(all_mask, str_off(mnt_point), "mount point & all");
test_statmount_string(all_mask, str_off(fs_type), "fs type & all");