linux-kernel - drivers/thermal/thermal_sysfs.c:794:9: warning: mixing declarations and code is a C99 extension

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Message-ID: <202205090117.wVvKlfFv-lkp@intel.com>
Date:   Mon, 9 May 2022 01:47:48 +0800
From:   kernel test robot <lkp@...el.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, 0day robot <lkp@...el.com>,
        Junwen Wu <wudaemon@....com>
Subject: drivers/thermal/thermal_sysfs.c:794:9: warning: mixing declarations
 and code is a C99 extension

tree:   https://github.com/intel-lab-lkp/linux/commits/UPDATE-20220508-232600/Zhang-Rui/thermal-thermal_stats-skip-broken-trans_table/20220419-165035
head:   a9158ddd9f2a97e356583d0bdb81c4e6822e6ad7
commit: a9158ddd9f2a97e356583d0bdb81c4e6822e6ad7 thermal/core: change mm alloc method to avoid kernel warning
date:   2 hours ago
config: riscv-randconfig-r042-20220508 (https://download.01.org/0day-ci/archive/20220509/202205090117.wVvKlfFv-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project a385645b470e2d3a1534aae618ea56b31177639f)
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://github.com/intel-lab-lkp/linux/commit/a9158ddd9f2a97e356583d0bdb81c4e6822e6ad7
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review UPDATE-20220508-232600/Zhang-Rui/thermal-thermal_stats-skip-broken-trans_table/20220419-165035
        git checkout a9158ddd9f2a97e356583d0bdb81c4e6822e6ad7
        # 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=riscv SHELL=/bin/bash drivers/thermal/

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/thermal/thermal_sysfs.c:794:9: warning: mixing declarations and code is a C99 extension [-Wdeclaration-after-statement]
       int l = min, r = max, mid, cnt = 0;
           ^
   1 warning generated.


vim +794 drivers/thermal/thermal_sysfs.c

   785	
   786	static int find_show_state( int *nums, int numsSize, int k, unsigned int *max_value)
   787	{
   788	    int i, min = INT_MAX, max = 0;
   789	    for( i = 0; i < numsSize; ++i )
   790	    {
   791	        min = nums[i] < min ? nums[i] : min;
   792	        max = nums[i] > max ? nums[i] : max;
   793	    }
 > 794	    int l = min, r = max, mid, cnt = 0;
   795	    while( l < r )
   796	    {
   797	        mid = r - (r - l) / 2;
   798	        for( i = 0; i < numsSize; ++i )
   799	        {
   800	            if( nums[i] >= mid )
   801	                ++cnt;
   802	        }
   803	        if( cnt < k )
   804	        {
   805	            r = mid - 1;
   806	            cnt = 0;
   807	        }
   808	        else
   809	        {
   810	            l = mid;
   811	            cnt = 0;
   812	        }
   813	    }
   814	     *max_value = max;
   815	    return l;
   816	}
   817	

-- 
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https://01.org/lkp