Hi Sebastian, kernel test robot noticed the following build warnings: [auto build test WARNING on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Sebastian-Andrzej-Siewior/net-Add-a-warning-if-NAPI-cb-missed-xdp_do_flush/20231006-235117 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20231006154933.mQgxQHHt%40linutronix.de patch subject: [PATCH bpf-next v2] net: Add a warning if NAPI cb missed xdp_do_flush(). config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20231007/202310070134.JX5try68-lkp@xxxxxxxxx/config) compiler: m68k-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231007/202310070134.JX5try68-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202310070134.JX5try68-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> net/core/filter.c:4211:6: warning: no previous prototype for 'xdp_do_check_flushed' [-Wmissing-prototypes] 4211 | void xdp_do_check_flushed(struct napi_struct *napi) | ^~~~~~~~~~~~~~~~~~~~ vim +/xdp_do_check_flushed +4211 net/core/filter.c 4209 4210 #if defined(CONFIG_DEBUG_NET) && defined(CONFIG_BPF_SYSCALL) > 4211 void xdp_do_check_flushed(struct napi_struct *napi) 4212 { 4213 bool ret; 4214 4215 ret = dev_check_flush(); 4216 ret |= cpu_map_check_flush(); 4217 ret |= xsk_map_check_flush(); 4218 4219 WARN_ONCE(ret, "Missing xdp_do_flush() invocation after NAPI by %ps\n", 4220 napi->poll); 4221 } 4222 #endif 4223 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
