lf_print_owner
static void lf_print_owner(struct lock_owner *);
lf_print_owner(v->v_owner);
lf_print_owner(x->v_owner);
lf_print_owner(y->v_owner);
lf_print_owner(x->v_owner);
lf_print_owner(y->v_owner);
lf_print_owner(lock->lf_owner);
lf_print_owner(lock->lf_owner);
lf_print_owner(blk->lf_owner);
lf_print_owner(lo);