lock_set_cmp_fn
lock_set_cmp_fn(&b->lock, btree_lock_cmp_fn, btree_lock_print_fn);
lock_set_cmp_fn(&pipe->mutex, pipe_lock_cmp_fn, NULL);
lock_set_cmp_fn(&ip->i_lock, xfs_rtginode_ilock_cmp_fn,
lock_set_cmp_fn(&dev->lock, netdev_lock_cmp_fn, NULL); \
lock_set_cmp_fn(&net->rtnl_mutex, rtnl_net_lock_cmp_fn, NULL);
lock_set_cmp_fn(&sk->sk_receive_queue.lock, unix_recvq_lock_cmp_fn, NULL);
lock_set_cmp_fn(&u->lock, unix_state_lock_cmp_fn, NULL);
lock_set_cmp_fn(&net->unx.table.locks[i], unix_table_lock_cmp_fn, NULL);