linux-kernel - drivers/opp/of.c:959:12: warning: stack frame size of 1056 bytes in function '_of_add_table

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Date:   Tue, 23 Mar 2021 15:23:24 +0800
From:   kernel test robot <lkp@...el.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org
Subject: drivers/opp/of.c:959:12: warning: stack frame size of 1056 bytes in
 function '_of_add_table_indexed'

Hi Viresh,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   84196390620ac0e5070ae36af84c137c6216a7dc
commit: 406e47652161d4f0d9bc4cd6237b36c51497ec75 opp: Create _of_add_table_indexed() to reduce code duplication
date:   7 weeks ago
config: powerpc64-randconfig-r023-20210323 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 14696baaf4c43fe53f738bc292bbe169eed93d5d)
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/?id=406e47652161d4f0d9bc4cd6237b36c51497ec75
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 406e47652161d4f0d9bc4cd6237b36c51497ec75
        # 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@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/opp/of.c:959:12: warning: stack frame size of 1056 bytes in function '_of_add_table_indexed' [-Wframe-larger-than=]
   static int _of_add_table_indexed(struct device *dev, int index)
              ^
   1 warning generated.


vim +/_of_add_table_indexed +959 drivers/opp/of.c

   958	
 > 959	static int _of_add_table_indexed(struct device *dev, int index)
   960	{
   961		struct opp_table *opp_table;
   962		int ret, count;
   963	
   964		if (index) {
   965			/*
   966			 * If only one phandle is present, then the same OPP table
   967			 * applies for all index requests.
   968			 */
   969			count = of_count_phandle_with_args(dev->of_node,
   970							   "operating-points-v2", NULL);
   971			if (count == 1)
   972				index = 0;
   973		}
   974	
   975		opp_table = _add_opp_table_indexed(dev, index);
   976		if (IS_ERR(opp_table))
   977			return PTR_ERR(opp_table);
   978	
   979		/*
   980		 * OPPs have two version of bindings now. Also try the old (v1)
   981		 * bindings for backward compatibility with older dtbs.
   982		 */
   983		if (opp_table->np)
   984			ret = _of_add_opp_table_v2(dev, opp_table);
   985		else
   986			ret = _of_add_opp_table_v1(dev, opp_table);
   987	
   988		if (ret)
   989			dev_pm_opp_put_opp_table(opp_table);
   990	
   991		return ret;
   992	}
   993	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (33974 bytes)