tree:   https://github.com/jpirko/linux_mlxsw petrm_wip4
head:   762771d39235289a988465b66509744f59996c66
commit: 762771d39235289a988465b66509744f59996c66 [5/5] wip
config: alpha-allyesconfig (attached as .config)
compiler: alpha-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 762771d39235289a988465b66509744f59996c66
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

net/sched/cls_api.c: In function 'tcf_qevent_handle':
>> net/sched/cls_api.c:3886:20: warning: variable 'fl' set but not used [-Wunused-but-set-variable]
3886 |  struct tcf_proto *fl;
|                    ^~

vim +/fl +3886 net/sched/cls_api.c

  3880	
  3881	struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch,
  3882					  struct sk_buff *skb, struct sk_buff **to_free,
  3883					  int *ret)
  3884	{
  3885		struct tcf_result cl_res;
> 3886		struct tcf_proto *fl;
  3887	
  3888		if (!qe->info.block_index)
  3889			return skb;
  3890	
  3891		fl = rcu_dereference_bh(qe->filter_chain);
  3892	
  3893		printk(KERN_WARNING "qevent\n");
  3894		switch (tcf_classify(skb, qe->filter_chain, &cl_res, false)) {
  3895		case TC_ACT_SHOT:
  3896			qdisc_qstats_drop(sch);
  3897			__qdisc_drop(skb, to_free);
  3898			*ret = __NET_XMIT_BYPASS;
  3899			return NULL;
  3900		case TC_ACT_STOLEN:
  3901		case TC_ACT_QUEUED:
  3902		case TC_ACT_TRAP:
  3903			__qdisc_drop(skb, to_free);
  3904			*ret = __NET_XMIT_STOLEN;
  3905			return NULL;
  3906		case TC_ACT_REDIRECT:
  3907			skb_do_redirect(skb);
  3908			*ret = __NET_XMIT_STOLEN;
  3909			return NULL;
  3910		}
  3911	
  3912		return skb;
  3913	}
  3914	EXPORT_SYMBOL(tcf_qevent_handle);
  3915	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org