linux-kernel - drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:721:12: warning: stack frame size (1056) exceeds limit (1024) in function 'hclge_dbg_dump_tm

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Message-ID: <202108220555.AHJbJqoe-lkp@intel.com>
Date:   Sun, 22 Aug 2021 05:37:02 +0800
From:   kernel test robot <lkp@...el.com>
To:     Guangbin Huang <huangguangbin2@...wei.com>
Cc:     clang-built-linux@...glegroups.com, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Huazhong Tan <tanhuazhong@...wei.com>
Subject: drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:721:12:
 warning: stack frame size (1056) exceeds limit (1024) in function
 'hclge_dbg_dump_tm_pg'

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/?id=cad7c215a4b1bc67920ab0d2673ac08a2cc885f1
        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@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:721:12: warning: stack frame size (1056) exceeds limit (1024) in function 'hclge_dbg_dump_tm_pg' [-Wframe-larger-than]
   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	
 > 721	static int hclge_dbg_dump_tm_pg(struct hclge_dev *hdev, char *buf, int len)
   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

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