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Message-ID: <202210250513.6x0M6cQ8-lkp@intel.com>
Date:   Tue, 25 Oct 2022 05:14:19 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Marco Elver <elver@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: [linux-stable-rc:linux-5.15.y 4376/9999]
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:967:12: warning:
 stack frame size (1040) exceeds limit (1024) in 'hclge_dbg_dump_tm_pri'

Hi Kees,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.15.y
head:   98108584d3851344414a5397dcff2c6f0a6cf9dd
commit: 33db9912ff7c491f839c89a08e98f755aa09598f [4376/9999] ubsan: remove CONFIG_UBSAN_OBJECT_SIZE
config: powerpc-allmodconfig
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
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 powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=33db9912ff7c491f839c89a08e98f755aa09598f
        git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
        git fetch --no-tags linux-stable-rc linux-5.15.y
        git checkout 33db9912ff7c491f839c89a08e98f755aa09598f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:967:12: warning: stack frame size (1040) exceeds limit (1024) in 'hclge_dbg_dump_tm_pri' [-Wframe-larger-than]
   static int hclge_dbg_dump_tm_pri(struct hclge_dev *hdev, char *buf, int len)
              ^
   1 warning generated.


vim +/hclge_dbg_dump_tm_pri +967 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c

04d96139ddb32d Guangbin Huang 2021-08-30   966  
04987ca1b9b684 Guangbin Huang 2021-01-28  @967  static int hclge_dbg_dump_tm_pri(struct hclge_dev *hdev, char *buf, int len)
04987ca1b9b684 Guangbin Huang 2021-01-28   968  {
04d96139ddb32d Guangbin Huang 2021-08-30   969  	char data_str[ARRAY_SIZE(tm_pri_items)][HCLGE_DBG_DATA_STR_LEN];
04d96139ddb32d Guangbin Huang 2021-08-30   970  	struct hclge_tm_shaper_para c_shaper_para, p_shaper_para;
04d96139ddb32d Guangbin Huang 2021-08-30   971  	char *result[ARRAY_SIZE(tm_pri_items)], *sch_mode_str;
04d96139ddb32d Guangbin Huang 2021-08-30   972  	char content[HCLGE_DBG_TM_INFO_LEN];
04d96139ddb32d Guangbin Huang 2021-08-30   973  	u8 pri_num, sch_mode, weight, i, j;
04d96139ddb32d Guangbin Huang 2021-08-30   974  	int pos, ret;
04987ca1b9b684 Guangbin Huang 2021-01-28   975  
04987ca1b9b684 Guangbin Huang 2021-01-28   976  	ret = hclge_tm_get_pri_num(hdev, &pri_num);
04987ca1b9b684 Guangbin Huang 2021-01-28   977  	if (ret)
04987ca1b9b684 Guangbin Huang 2021-01-28   978  		return ret;
04987ca1b9b684 Guangbin Huang 2021-01-28   979  
04d96139ddb32d Guangbin Huang 2021-08-30   980  	for (i = 0; i < ARRAY_SIZE(tm_pri_items); i++)
04d96139ddb32d Guangbin Huang 2021-08-30   981  		result[i] = &data_str[i][0];
04d96139ddb32d Guangbin Huang 2021-08-30   982  
04d96139ddb32d Guangbin Huang 2021-08-30   983  	hclge_dbg_fill_content(content, sizeof(content), tm_pri_items,
04d96139ddb32d Guangbin Huang 2021-08-30   984  			       NULL, ARRAY_SIZE(tm_pri_items));
04d96139ddb32d Guangbin Huang 2021-08-30   985  	pos = scnprintf(buf, len, "%s", content);
04987ca1b9b684 Guangbin Huang 2021-01-28   986  
04987ca1b9b684 Guangbin Huang 2021-01-28   987  	for (i = 0; i < pri_num; i++) {
04987ca1b9b684 Guangbin Huang 2021-01-28   988  		ret = hclge_tm_get_pri_sch_mode(hdev, i, &sch_mode);
04987ca1b9b684 Guangbin Huang 2021-01-28   989  		if (ret)
04987ca1b9b684 Guangbin Huang 2021-01-28   990  			return ret;
04987ca1b9b684 Guangbin Huang 2021-01-28   991  
04987ca1b9b684 Guangbin Huang 2021-01-28   992  		ret = hclge_tm_get_pri_weight(hdev, i, &weight);
04987ca1b9b684 Guangbin Huang 2021-01-28   993  		if (ret)
04987ca1b9b684 Guangbin Huang 2021-01-28   994  			return ret;
04987ca1b9b684 Guangbin Huang 2021-01-28   995  
04987ca1b9b684 Guangbin Huang 2021-01-28   996  		ret = hclge_tm_get_pri_shaper(hdev, i,
04987ca1b9b684 Guangbin Huang 2021-01-28   997  					      HCLGE_OPC_TM_PRI_C_SHAPPING,
04987ca1b9b684 Guangbin Huang 2021-01-28   998  					      &c_shaper_para);
04987ca1b9b684 Guangbin Huang 2021-01-28   999  		if (ret)
04987ca1b9b684 Guangbin Huang 2021-01-28  1000  			return ret;
04987ca1b9b684 Guangbin Huang 2021-01-28  1001  
04987ca1b9b684 Guangbin Huang 2021-01-28  1002  		ret = hclge_tm_get_pri_shaper(hdev, i,
04987ca1b9b684 Guangbin Huang 2021-01-28  1003  					      HCLGE_OPC_TM_PRI_P_SHAPPING,
04987ca1b9b684 Guangbin Huang 2021-01-28  1004  					      &p_shaper_para);
04987ca1b9b684 Guangbin Huang 2021-01-28  1005  		if (ret)
04987ca1b9b684 Guangbin Huang 2021-01-28  1006  			return ret;
04987ca1b9b684 Guangbin Huang 2021-01-28  1007  
04987ca1b9b684 Guangbin Huang 2021-01-28  1008  		sch_mode_str = sch_mode & HCLGE_TM_TX_SCHD_DWRR_MSK ? "dwrr" :
04987ca1b9b684 Guangbin Huang 2021-01-28  1009  			       "sp";
04987ca1b9b684 Guangbin Huang 2021-01-28  1010  
04d96139ddb32d Guangbin Huang 2021-08-30  1011  		j = 0;
04d96139ddb32d Guangbin Huang 2021-08-30  1012  		sprintf(result[j++], "%04u", i);
04d96139ddb32d Guangbin Huang 2021-08-30  1013  		sprintf(result[j++], "%4s", sch_mode_str);
04d96139ddb32d Guangbin Huang 2021-08-30  1014  		sprintf(result[j++], "%3u", weight);
04d96139ddb32d Guangbin Huang 2021-08-30  1015  		hclge_dbg_fill_shaper_content(&c_shaper_para, result, &j);
04d96139ddb32d Guangbin Huang 2021-08-30  1016  		hclge_dbg_fill_shaper_content(&p_shaper_para, result, &j);
04d96139ddb32d Guangbin Huang 2021-08-30  1017  		hclge_dbg_fill_content(content, sizeof(content), tm_pri_items,
04d96139ddb32d Guangbin Huang 2021-08-30  1018  				       (const char **)result,
04d96139ddb32d Guangbin Huang 2021-08-30  1019  				       ARRAY_SIZE(tm_pri_items));
04d96139ddb32d Guangbin Huang 2021-08-30  1020  		pos += scnprintf(buf + pos, len - pos, "%s", content);
04987ca1b9b684 Guangbin Huang 2021-01-28  1021  	}
04987ca1b9b684 Guangbin Huang 2021-01-28  1022  
04987ca1b9b684 Guangbin Huang 2021-01-28  1023  	return 0;
04987ca1b9b684 Guangbin Huang 2021-01-28  1024  }
04987ca1b9b684 Guangbin Huang 2021-01-28  1025  

:::::: The code at line 967 was first introduced by commit
:::::: 04987ca1b9b6841cfa5f9b459c5a270b75c89345 net: hns3: add debugfs support for tm nodes, priority and qset info

:::::: TO: Guangbin Huang <huangguangbin2@...wei.com>
:::::: CC: Jakub Kicinski <kuba@...nel.org>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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