Hi Paolo, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on net/master] [also build test ERROR on net-next/master linus/master v5.8-rc1 next-20200618] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Paolo-Abeni/net-sched-add-indire... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git ef7232da6bcd4294cbb2d424bc35885721570f01 config: x86_64-randconfig-a001-20200619 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 487ca07fcc75d52755c9fe2ee05bcb3b6eeeec44) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): In file included from net/sched/sch_codel.c:54: INDIRECT_CALLABLE_DECLARE(struct sk_buff *NET_SCHED_DEQUEUE(struct Qdisc *q)); ^ include/net/sch_hint.h:27:27: note: expanded from macro 'NET_SCHED_DEQUEUE' #define NET_SCHED_DEQUEUE codel_dequeue ^ include/net/codel_impl.h:142:24: note: previous definition is here static struct sk_buff *codel_dequeue(void *ctx, ^ CODEL_SCOPE struct sk_buff *codel_qdisc_dequeue(struct Qdisc *sch) ^ net/sched/sch_codel.c:93:13: note: declare 'static' if the function is not intended to be used outside of this translation unit CODEL_SCOPE struct sk_buff *codel_qdisc_dequeue(struct Qdisc *sch) ^ static CODEL_SCOPE int codel_qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch, ^ net/sched/sch_codel.c:115:13: note: declare 'static' if the function is not intended to be used outside of this translation unit CODEL_SCOPE int codel_qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch, ^ static 2 warnings and 1 error generated. -- In file included from net/sched/sch_fq_codel.c:25: INDIRECT_CALLABLE_DECLARE(struct sk_buff *NET_SCHED_DEQUEUE(struct Qdisc *q)); ^ include/net/sch_hint.h:27:27: note: expanded from macro 'NET_SCHED_DEQUEUE' #define NET_SCHED_DEQUEUE codel_dequeue ^ include/net/codel_impl.h:142:24: note: previous definition is here static struct sk_buff *codel_dequeue(void *ctx, ^ 1 error generated. vim +/codel_dequeue +39 include/net/sch_hint.h 34 35 #if defined(NET_SCHED_DEQUEUE) 36 INDIRECT_CALLABLE_DECLARE(int NET_SCHED_ENQUEUE(struct sk_buff *skb, 37 struct Qdisc *qdisc, 38 struct sk_buff **to_free)); 40 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org