Hi Alexander, Thank you for the patch! Yet something to improve: [auto build test ERROR on net-next/master] url: https://github.com/0day-ci/linux/commits/Alexander-Lobakin/skbuff-introdu... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git de1db4a6ed6241e34cab0e5059d4b56f6bae39b9 config: sh-allmodconfig (attached as .config) compiler: sh4-linux-gcc (GCC) 9.3.0 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 # https://github.com/0day-ci/linux/commit/6bb224307d9f31afa154a8825f9acbd8e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Alexander-Lobakin/skbuff-introduce-skbuff_heads-bulking-and-reusing/20210211-004041 git checkout 6bb224307d9f31afa154a8825f9acbd8e9f6b490 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): net/core/dev.c: In function 'napi_threaded_poll': 7012 | __kfree_skb_flush(); | ^~~~~~~~~~~~~~~~~ | __kfree_skb_defer cc1: some warnings being treated as errors Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for SND_ATMEL_SOC_PDC Depends on SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC && HAS_DMA Selected by - SND_ATMEL_SOC_SSC && SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC - SND_ATMEL_SOC_SSC_PDC && SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC && ATMEL_SSC vim +7012 net/core/dev.c 29863d41bb6e1d Wei Wang 2021-02-08 6996 29863d41bb6e1d Wei Wang 2021-02-08 6997 static int napi_threaded_poll(void *data) 29863d41bb6e1d Wei Wang 2021-02-08 6998 { 29863d41bb6e1d Wei Wang 2021-02-08 6999 struct napi_struct *napi = data; 29863d41bb6e1d Wei Wang 2021-02-08 7000 void *have; 29863d41bb6e1d Wei Wang 2021-02-08 7001 29863d41bb6e1d Wei Wang 2021-02-08 7002 while (!napi_thread_wait(napi)) { 29863d41bb6e1d Wei Wang 2021-02-08 7003 for (;;) { 29863d41bb6e1d Wei Wang 2021-02-08 7004 bool repoll = false; 29863d41bb6e1d Wei Wang 2021-02-08 7005 29863d41bb6e1d Wei Wang 2021-02-08 7006 local_bh_disable(); 29863d41bb6e1d Wei Wang 2021-02-08 7007 29863d41bb6e1d Wei Wang 2021-02-08 7008 have = netpoll_poll_lock(napi); 29863d41bb6e1d Wei Wang 2021-02-08 7009 __napi_poll(napi, &repoll); 29863d41bb6e1d Wei Wang 2021-02-08 7010 netpoll_poll_unlock(have); 29863d41bb6e1d Wei Wang 2021-02-08 7011 29863d41bb6e1d Wei Wang 2021-02-08 @7012 __kfree_skb_flush(); 29863d41bb6e1d Wei Wang 2021-02-08 7013 local_bh_enable(); 29863d41bb6e1d Wei Wang 2021-02-08 7014 29863d41bb6e1d Wei Wang 2021-02-08 7015 if (!repoll) 29863d41bb6e1d Wei Wang 2021-02-08 7016 break; 29863d41bb6e1d Wei Wang 2021-02-08 7017 29863d41bb6e1d Wei Wang 2021-02-08 7018 cond_resched(); 29863d41bb6e1d Wei Wang 2021-02-08 7019 } 29863d41bb6e1d Wei Wang 2021-02-08 7020 } 29863d41bb6e1d Wei Wang 2021-02-08 7021 return 0; 29863d41bb6e1d Wei Wang 2021-02-08 7022 } 29863d41bb6e1d Wei Wang 2021-02-08 7023 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org