[kbuild-all] drivers/net/ethernet/chelsio/cxgb4/sge.c:2396:13: warning: stack frame size of 1168 bytes in function 'ethofld_xmit'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 84196390620ac0e5070ae36af84c137c6216a7dc commit: 97e4910232fa1f81e806aa60c25a0450276d99a2 linux/compiler-clang.h: define HAVE_BUILTIN_BSWAP* date: 9 days ago config: mips-randconfig-r023-20210322 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 78a65cd945d006ff02f9d24d9cc20a302ed93b08) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-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 97e4910232fa1f81e806aa60c25a0450276d99a2 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips 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 >>): drivers/net/ethernet/chelsio/cxgb4/sge.c:814:28: warning: unused function 'calc_tx_descs' [-Wunused-function] static inline unsigned int calc_tx_descs(const struct sk_buff *skb, ^ static void ethofld_xmit(struct net_device *dev, struct sge_eosw_txq *eosw_txq) ^ 2 warnings generated. vim +/ethofld_xmit +2396 drivers/net/ethernet/chelsio/cxgb4/sge.c 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2395 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 @2396 static void ethofld_xmit(struct net_device *dev, struct sge_eosw_txq *eosw_txq) 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2397 { 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2398 struct sk_buff *skb; 4f1d97262d58e0 Rahul Lakkireddy 2020-05-15 2399 int pktcount, ret; 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2400 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2401 switch (eosw_txq->state) { 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2402 case CXGB4_EO_STATE_ACTIVE: 0e395b3cb1fb82 Rahul Lakkireddy 2019-11-07 2403 case CXGB4_EO_STATE_FLOWC_OPEN_SEND: 0e395b3cb1fb82 Rahul Lakkireddy 2019-11-07 2404 case CXGB4_EO_STATE_FLOWC_CLOSE_SEND: 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2405 pktcount = eosw_txq->pidx - eosw_txq->last_pidx; 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2406 if (pktcount < 0) 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2407 pktcount += eosw_txq->ndesc; 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2408 break; 0e395b3cb1fb82 Rahul Lakkireddy 2019-11-07 2409 case CXGB4_EO_STATE_FLOWC_OPEN_REPLY: 0e395b3cb1fb82 Rahul Lakkireddy 2019-11-07 2410 case CXGB4_EO_STATE_FLOWC_CLOSE_REPLY: 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2411 case CXGB4_EO_STATE_CLOSED: 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2412 default: 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2413 return; 272630feb4c0d2 Rahul Lakkireddy 2019-11-19 2414 } 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2415 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2416 while (pktcount--) { 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2417 skb = eosw_txq_peek(eosw_txq); 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2418 if (!skb) { 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2419 eosw_txq_advance_index(&eosw_txq->last_pidx, 1, 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2420 eosw_txq->ndesc); 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2421 continue; 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2422 } 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2423 4f1d97262d58e0 Rahul Lakkireddy 2020-05-15 2424 ret = ethofld_hard_xmit(dev, eosw_txq); 4f1d97262d58e0 Rahul Lakkireddy 2020-05-15 2425 if (ret) 4f1d97262d58e0 Rahul Lakkireddy 2020-05-15 2426 break; 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2427 } 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2428 } 4846d5330dafc8 Rahul Lakkireddy 2019-11-07 2429 :::::: The code at line 2396 was first introduced by commit :::::: 4846d5330dafc82990be7ffe1d1b383157268bd9 cxgb4: add Tx and Rx path for ETHOFLD traffic :::::: TO: Rahul Lakkireddy <rahul.lakkireddy(a)chelsio.com&gt; :::::: CC: David S. Miller <davem(a)davemloft.net&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org