tree: https://github.com/congwang/linux.git sch_bpf head: 0ad458bc4f0d7706cb35ddbf35a148527c382d26 commit: 0ad458bc4f0d7706cb35ddbf35a148527c382d26 [2/2] sch_bpf: draft config: nios2-randconfig-s031-20210814 (attached as .config) compiler: nios2-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-348-gf0e6938b-dirty # https://github.com/congwang/linux/commit/0ad458bc4f0d7706cb35ddbf35a14852... git remote add congwang https://github.com/congwang/linux.git git fetch --no-tags congwang sch_bpf git checkout 0ad458bc4f0d7706cb35ddbf35a148527c382d26 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=nios2 SHELL=/bin/bash net/sched/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) net/sched/sch_bpf.c:238:19: sparse: sparse: incompatible types in comparison expression (different address spaces): net/sched/sch_bpf.c:238:19: sparse: struct bpf_prog [noderef] __rcu * net/sched/sch_bpf.c:238:19: sparse: struct bpf_prog * vim +168 net/sched/sch_bpf.c 154 155 static int sch_bpf_enqueue(struct sk_buff *skb, struct Qdisc *sch, 156 struct sk_buff **to_free) 157 { 158 struct sch_bpf_qdisc *q = qdisc_priv(sch); 159 unsigned int len = qdisc_pkt_len(skb); 160 struct sch_bpf_ctx ctx = {}; 161 struct sch_bpf_class *cl; 162 int res; 163 164 cl = sch_bpf_classify(skb, sch, &res); 165 if (!cl) { 166 struct bpf_prog *enqueue; 167 169 bpf_compute_data_pointers(skb); 170 171 ctx.skb = (struct __sk_buff *)skb; 172 ctx.nr_flows = q->clhash.hashelems; 173 ctx.nr_packets = sch->q.qlen; 174 res = BPF_PROG_RUN(enqueue, &ctx); 175 if (res == SCH_BPF_RET_DROP) { 176 __qdisc_drop(skb, to_free); 177 return NET_XMIT_DROP; 178 } 179 cl = sch_bpf_find(sch, ctx.classid); 180 if (!cl) { 181 if (res & __NET_XMIT_BYPASS) 182 qdisc_qstats_drop(sch); 183 __qdisc_drop(skb, to_free); 184 return res; 185 } 186 } 187 188 if (cl->qdisc) { 189 res = qdisc_enqueue(skb, cl->qdisc, to_free); 190 if (res != NET_XMIT_SUCCESS) { 191 if (net_xmit_drop_count(res)) { 192 qdisc_qstats_drop(sch); 193 cl->drops++; 194 } 195 return res; 196 } 197 } else { 198 sch_bpf_skb_cb(skb)->rank = ctx.rank; 199 pq_push(&cl->pq, &skb->pqnode); 200 } 201 202 sch->qstats.backlog += len; 203 sch->q.qlen++; 204 return res; 205 } 206 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org