Hi Guangbin, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9ff50bf2f2ff5fab01cac26d8eed21a89308e6ef commit: cad7c215a4b1bc67920ab0d2673ac08a2cc885f1 net: hns3: refactor dump tm of debugfs date: 3 months ago config: riscv-randconfig-r021-20210822 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 9e9d70591e72fc6762b4b9a226b68ed1307419bf) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-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 cad7c215a4b1bc67920ab0d2673ac08a2cc885f1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 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 >>): static int hclge_dbg_dump_tm_pg(struct hclge_dev *hdev, char *buf, int len) ^ 1 warning generated. vim +/hclge_dbg_dump_tm_pg +721 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c 720 722 { 723 char data_str[ARRAY_SIZE(tm_pg_items)][HCLGE_DBG_DATA_STR_LEN]; 724 struct hclge_tm_shaper_para c_shaper_para, p_shaper_para; 725 char *result[ARRAY_SIZE(tm_pg_items)], *sch_mode_str; 726 u8 pg_id, sch_mode, weight, pri_bit_map, i, j; 727 char content[HCLGE_DBG_TM_INFO_LEN]; 728 int pos = 0; 729 int ret; 730 731 for (i = 0; i < ARRAY_SIZE(tm_pg_items); i++) 732 result[i] = &data_str[i][0]; 733 734 hclge_dbg_fill_content(content, sizeof(content), tm_pg_items, 735 NULL, ARRAY_SIZE(tm_pg_items)); 736 pos += scnprintf(buf + pos, len - pos, "%s", content); 737 738 for (pg_id = 0; pg_id < hdev->tm_info.num_pg; pg_id++) { 739 ret = hclge_tm_get_pg_to_pri_map(hdev, pg_id, &pri_bit_map); 740 if (ret) 741 return ret; 742 743 ret = hclge_tm_get_pg_sch_mode(hdev, pg_id, &sch_mode); 744 if (ret) 745 return ret; 746 747 ret = hclge_tm_get_pg_weight(hdev, pg_id, &weight); 748 if (ret) 749 return ret; 750 751 ret = hclge_tm_get_pg_shaper(hdev, pg_id, 752 HCLGE_OPC_TM_PG_C_SHAPPING, 753 &c_shaper_para); 754 if (ret) 755 return ret; 756 757 ret = hclge_tm_get_pg_shaper(hdev, pg_id, 758 HCLGE_OPC_TM_PG_P_SHAPPING, 759 &p_shaper_para); 760 if (ret) 761 return ret; 762 763 sch_mode_str = sch_mode & HCLGE_TM_TX_SCHD_DWRR_MSK ? "dwrr" : 764 "sp"; 765 766 j = 0; 767 sprintf(result[j++], "%02u", pg_id); 768 sprintf(result[j++], "0x%02x", pri_bit_map); 769 sprintf(result[j++], "%4s", sch_mode_str); 770 sprintf(result[j++], "%3u", weight); 771 hclge_dbg_fill_shaper_content(&c_shaper_para, result, &j); 772 hclge_dbg_fill_shaper_content(&p_shaper_para, result, &j); 773 774 hclge_dbg_fill_content(content, sizeof(content), tm_pg_items, 775 (const char **)result, 776 ARRAY_SIZE(tm_pg_items)); 777 pos += scnprintf(buf + pos, len - pos, "%s", content); 778 } 779 780 return 0; 781 } 782 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org