On Sat, Jul 05, 2025 at 06:57:15AM +0100, Al Viro wrote: > +static inline void mnt_add_instance(struct mount *m, struct super_block *s) > +{ > + struct mount *first = s->s_mounts; > + > + if (first) > + first->mnt_prev_for_sb = (unsigned long)m; ^^^^^^^^^^^^^^^^ (unsigned long)&m->mnt_next_for_sb; that is...