[kbuild-all] drivers/net/ethernet/sfc/farch.c:1257:5: warning: stack frame size of 1072 bytes in function 'efx_farch_ev_process'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5ee88057889bbca5f5bb96031b62b3756b33e164 commit: 35ff765f8d508e56d09ef470395324298550c415 sfc: fix W=1 warnings in efx_farch_handle_rx_not_ok date: 5 months ago config: powerpc64-randconfig-r025-20210115 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 6077d55381a6aa3e947ef7abdc36a7515c598c8a) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 35ff765f8d508e56d09ef470395324298550c415 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): int efx_farch_ev_process(struct efx_channel *channel, int budget) ^ 1 warning generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for ATA Depends on HAS_IOMEM && BLOCK Selected by - AKEBONO && PPC_47x WARNING: unmet direct dependencies detected for NETDEVICES Depends on NET Selected by - AKEBONO && PPC_47x WARNING: unmet direct dependencies detected for ETHERNET Depends on NETDEVICES && NET Selected by - AKEBONO && PPC_47x WARNING: unmet direct dependencies detected for HOTPLUG_CPU Depends on SMP && (PPC_PSERIES || PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE Selected by - PM_SLEEP_SMP && SMP && (ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE && PM_SLEEP WARNING: unmet direct dependencies detected for NET_DEVLINK Depends on NET Selected by - ICE && NETDEVICES && ETHERNET && NET_VENDOR_INTEL && PCI_MSI - MLX5_CORE && NETDEVICES && ETHERNET && NET_VENDOR_MELLANOX && PCI && (VXLAN || !VXLAN && (MLXFW || !MLXFW && (PTP_1588_CLOCK || !PTP_1588_CLOCK && (PCI_HYPERV_INTERFACE || !PCI_HYPERV_INTERFACE - MLXSW_CORE && NETDEVICES && ETHERNET && NET_VENDOR_MELLANOX - MLXFW && NETDEVICES && ETHERNET && NET_VENDOR_MELLANOX WARNING: unmet direct dependencies detected for GRO_CELLS Depends on NET Selected by - RMNET && NETDEVICES && ETHERNET && NET_VENDOR_QUALCOMM WARNING: unmet direct dependencies detected for FAILOVER Depends on NET Selected by - NET_FAILOVER && NETDEVICES WARNING: unmet direct dependencies detected for PAGE_POOL Depends on NET Selected by - STMMAC_ETH && NETDEVICES && ETHERNET && NET_VENDOR_STMICRO && HAS_IOMEM && HAS_DMA vim +/efx_farch_ev_process +1257 drivers/net/ethernet/sfc/farch.c 86094f7f38ff711f Ben Hutchings 2013-08-21 1256 86094f7f38ff711f Ben Hutchings 2013-08-21 @1257 int efx_farch_ev_process(struct efx_channel *channel, int budget) 86094f7f38ff711f Ben Hutchings 2013-08-21 1258 { 86094f7f38ff711f Ben Hutchings 2013-08-21 1259 struct efx_nic *efx = channel->efx; 86094f7f38ff711f Ben Hutchings 2013-08-21 1260 unsigned int read_ptr; 86094f7f38ff711f Ben Hutchings 2013-08-21 1261 efx_qword_t event, *p_event; 86094f7f38ff711f Ben Hutchings 2013-08-21 1262 int ev_code; 86094f7f38ff711f Ben Hutchings 2013-08-21 1263 int spent = 0; 86094f7f38ff711f Ben Hutchings 2013-08-21 1264 75363a4676cdb046 Eric W. Biederman 2014-03-14 1265 if (budget <= 0) 75363a4676cdb046 Eric W. Biederman 2014-03-14 1266 return spent; 75363a4676cdb046 Eric W. Biederman 2014-03-14 1267 86094f7f38ff711f Ben Hutchings 2013-08-21 1268 read_ptr = channel->eventq_read_ptr; 86094f7f38ff711f Ben Hutchings 2013-08-21 1269 86094f7f38ff711f Ben Hutchings 2013-08-21 1270 for (;;) { 86094f7f38ff711f Ben Hutchings 2013-08-21 1271 p_event = efx_event(channel, read_ptr); 86094f7f38ff711f Ben Hutchings 2013-08-21 1272 event = *p_event; 86094f7f38ff711f Ben Hutchings 2013-08-21 1273 86094f7f38ff711f Ben Hutchings 2013-08-21 1274 if (!efx_event_present(&event)) 86094f7f38ff711f Ben Hutchings 2013-08-21 1275 /* End of events */ 86094f7f38ff711f Ben Hutchings 2013-08-21 1276 break; 86094f7f38ff711f Ben Hutchings 2013-08-21 1277 86094f7f38ff711f Ben Hutchings 2013-08-21 1278 netif_vdbg(channel->efx, intr, channel->efx->net_dev, 86094f7f38ff711f Ben Hutchings 2013-08-21 1279 "channel %d event is "EFX_QWORD_FMT"\n", 86094f7f38ff711f Ben Hutchings 2013-08-21 1280 channel->channel, EFX_QWORD_VAL(event)); 86094f7f38ff711f Ben Hutchings 2013-08-21 1281 86094f7f38ff711f Ben Hutchings 2013-08-21 1282 /* Clear this event by marking it all ones */ 86094f7f38ff711f Ben Hutchings 2013-08-21 1283 EFX_SET_QWORD(*p_event); 86094f7f38ff711f Ben Hutchings 2013-08-21 1284 86094f7f38ff711f Ben Hutchings 2013-08-21 1285 ++read_ptr; 86094f7f38ff711f Ben Hutchings 2013-08-21 1286 86094f7f38ff711f Ben Hutchings 2013-08-21 1287 ev_code = EFX_QWORD_FIELD(event, FSF_AZ_EV_CODE); 86094f7f38ff711f Ben Hutchings 2013-08-21 1288 86094f7f38ff711f Ben Hutchings 2013-08-21 1289 switch (ev_code) { 86094f7f38ff711f Ben Hutchings 2013-08-21 1290 case FSE_AZ_EV_CODE_RX_EV: 86094f7f38ff711f Ben Hutchings 2013-08-21 1291 efx_farch_handle_rx_event(channel, &event); 86094f7f38ff711f Ben Hutchings 2013-08-21 1292 if (++spent == budget) 86094f7f38ff711f Ben Hutchings 2013-08-21 1293 goto out; 86094f7f38ff711f Ben Hutchings 2013-08-21 1294 break; 86094f7f38ff711f Ben Hutchings 2013-08-21 1295 case FSE_AZ_EV_CODE_TX_EV: 5227ecccea2d645d Bert Kenward 2018-01-25 1296 efx_farch_handle_tx_event(channel, &event); 86094f7f38ff711f Ben Hutchings 2013-08-21 1297 break; 86094f7f38ff711f Ben Hutchings 2013-08-21 1298 case FSE_AZ_EV_CODE_DRV_GEN_EV: 86094f7f38ff711f Ben Hutchings 2013-08-21 1299 efx_farch_handle_generated_event(channel, &event); 86094f7f38ff711f Ben Hutchings 2013-08-21 1300 break; 86094f7f38ff711f Ben Hutchings 2013-08-21 1301 case FSE_AZ_EV_CODE_DRIVER_EV: 86094f7f38ff711f Ben Hutchings 2013-08-21 1302 efx_farch_handle_driver_event(channel, &event); 86094f7f38ff711f Ben Hutchings 2013-08-21 1303 break; 7fa8d547049aae54 Shradha Shah 2015-05-06 1304 #ifdef CONFIG_SFC_SRIOV 86094f7f38ff711f Ben Hutchings 2013-08-21 1305 case FSE_CZ_EV_CODE_USER_EV: 327c685eb745e3c5 Shradha Shah 2014-11-05 1306 efx_siena_sriov_event(channel, &event); 86094f7f38ff711f Ben Hutchings 2013-08-21 1307 break; 7fa8d547049aae54 Shradha Shah 2015-05-06 1308 #endif 86094f7f38ff711f Ben Hutchings 2013-08-21 1309 case FSE_CZ_EV_CODE_MCDI_EV: 86094f7f38ff711f Ben Hutchings 2013-08-21 1310 efx_mcdi_process_event(channel, &event); 86094f7f38ff711f Ben Hutchings 2013-08-21 1311 break; 86094f7f38ff711f Ben Hutchings 2013-08-21 1312 case FSE_AZ_EV_CODE_GLOBAL_EV: 86094f7f38ff711f Ben Hutchings 2013-08-21 1313 if (efx->type->handle_global_event && 86094f7f38ff711f Ben Hutchings 2013-08-21 1314 efx->type->handle_global_event(channel, &event)) 86094f7f38ff711f Ben Hutchings 2013-08-21 1315 break; 86094f7f38ff711f Ben Hutchings 2013-08-21 1316 /* else fall through */ 86094f7f38ff711f Ben Hutchings 2013-08-21 1317 default: 86094f7f38ff711f Ben Hutchings 2013-08-21 1318 netif_err(channel->efx, hw, channel->efx->net_dev, 86094f7f38ff711f Ben Hutchings 2013-08-21 1319 "channel %d unknown event type %d (data " 86094f7f38ff711f Ben Hutchings 2013-08-21 1320 EFX_QWORD_FMT ")\n", channel->channel, 86094f7f38ff711f Ben Hutchings 2013-08-21 1321 ev_code, EFX_QWORD_VAL(event)); 86094f7f38ff711f Ben Hutchings 2013-08-21 1322 } 86094f7f38ff711f Ben Hutchings 2013-08-21 1323 } 86094f7f38ff711f Ben Hutchings 2013-08-21 1324 86094f7f38ff711f Ben Hutchings 2013-08-21 1325 out: 86094f7f38ff711f Ben Hutchings 2013-08-21 1326 channel->eventq_read_ptr = read_ptr; 86094f7f38ff711f Ben Hutchings 2013-08-21 1327 return spent; 86094f7f38ff711f Ben Hutchings 2013-08-21 1328 } 86094f7f38ff711f Ben Hutchings 2013-08-21 1329 :::::: The code at line 1257 was first introduced by commit :::::: 86094f7f38ff711f3db8497fcb4d2e109100f497 sfc: Move and rename Falcon/Siena common NIC operations :::::: TO: Ben Hutchings <bhutchings(a)solarflare.com&gt; :::::: CC: Ben Hutchings <bhutchings(a)solarflare.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org