Re: [PATCH] net/sched: unregister root_lock_key in the error path of qdisc_alloc()

[kernel test robot <lkp@intel.com>]

Hi Hou,

kernel test robot noticed the following build errors:

[auto build test ERROR on v6.9]
[cannot apply to net/main net-next/main linus/master next-20240517]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Hou-Tao/net-sched-unregister-root_lock_key-in-the-error-path-of-qdisc_alloc/20240516-213538
base:   v6.9
patch link:    https://lore.kernel.org/r/20240516133035.1050113-1-houtao%40huaweicloud.com
patch subject: [PATCH] net/sched: unregister root_lock_key in the error path of qdisc_alloc()
config: openrisc-defconfig (https://download.01.org/0day-ci/archive/20240517/202405171311.SyRzzQjC-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240517/202405171311.SyRzzQjC-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405171311.SyRzzQjC-lkp@intel.com/

All errors (new ones prefixed by >>):

   net/sched/sch_generic.c: In function 'qdisc_alloc':
>> net/sched/sch_generic.c:983:36: error: 'struct Qdisc' has no member named 'root_lock_key'
     983 |         lockdep_unregister_key(&sch->root_lock_key);
         |                                    ^~


vim +983 net/sched/sch_generic.c

   924	
   925	struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
   926				  const struct Qdisc_ops *ops,
   927				  struct netlink_ext_ack *extack)
   928	{
   929		struct Qdisc *sch;
   930		unsigned int size = sizeof(*sch) + ops->priv_size;
   931		int err = -ENOBUFS;
   932		struct net_device *dev;
   933	
   934		if (!dev_queue) {
   935			NL_SET_ERR_MSG(extack, "No device queue given");
   936			err = -EINVAL;
   937			goto errout;
   938		}
   939	
   940		dev = dev_queue->dev;
   941		sch = kzalloc_node(size, GFP_KERNEL, netdev_queue_numa_node_read(dev_queue));
   942	
   943		if (!sch)
   944			goto errout;
   945		__skb_queue_head_init(&sch->gso_skb);
   946		__skb_queue_head_init(&sch->skb_bad_txq);
   947		gnet_stats_basic_sync_init(&sch->bstats);
   948		spin_lock_init(&sch->q.lock);
   949	
   950		if (ops->static_flags & TCQ_F_CPUSTATS) {
   951			sch->cpu_bstats =
   952				netdev_alloc_pcpu_stats(struct gnet_stats_basic_sync);
   953			if (!sch->cpu_bstats)
   954				goto errout1;
   955	
   956			sch->cpu_qstats = alloc_percpu(struct gnet_stats_queue);
   957			if (!sch->cpu_qstats) {
   958				free_percpu(sch->cpu_bstats);
   959				goto errout1;
   960			}
   961		}
   962	
   963		spin_lock_init(&sch->busylock);
   964		lockdep_set_class(&sch->busylock,
   965				  dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
   966	
   967		/* seqlock has the same scope of busylock, for NOLOCK qdisc */
   968		spin_lock_init(&sch->seqlock);
   969		lockdep_set_class(&sch->seqlock,
   970				  dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
   971	
   972		sch->ops = ops;
   973		sch->flags = ops->static_flags;
   974		sch->enqueue = ops->enqueue;
   975		sch->dequeue = ops->dequeue;
   976		sch->dev_queue = dev_queue;
   977		sch->owner = -1;
   978		netdev_hold(dev, &sch->dev_tracker, GFP_KERNEL);
   979		refcount_set(&sch->refcnt, 1);
   980	
   981		return sch;
   982	errout1:
 > 983		lockdep_unregister_key(&sch->root_lock_key);
   984		kfree(sch);
   985	errout:
   986		return ERR_PTR(err);
   987	}
   988	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki