T_UMOUNT_CANDIDATE
return m->mnt_t_flags & T_UMOUNT_CANDIDATE;
m->mnt_t_flags &= ~(T_MARKED | T_UMOUNT_CANDIDATE);
m->mnt_t_flags |= T_UMOUNT_CANDIDATE;
child->mnt_t_flags |= T_UMOUNT_CANDIDATE;
m->mnt_t_flags &= ~T_UMOUNT_CANDIDATE;
p->mnt_t_flags &= ~T_UMOUNT_CANDIDATE;