tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-nonmm-unstable
head:   64c11a51786ab90e52eec4f6d7ad9a6a78916358
commit: 64c11a51786ab90e52eec4f6d7ad9a6a78916358 [15/15] lib: add Dhrystone benchmark test
config: powerpc-buildonly-randconfig-r003-20221217
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 98b13979fb05f3ed288a900deb843e7b27589e58)
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/akpm/mm.git/commit/?id=64c11a51786ab90e52eec4f6d7ad9a6a78916358
        git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
        git fetch --no-tags akpm-mm mm-nonmm-unstable
        git checkout 64c11a51786ab90e52eec4f6d7ad9a6a78916358
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$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@intel.com>

All warnings (new ones prefixed by >>):

>> lib/dhry_run.c:61:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
           if (val) {
               ^~~
   lib/dhry_run.c:72:9: note: uninitialized use occurs here
           return ret;
                  ^~~
   lib/dhry_run.c:61:2: note: remove the 'if' if its condition is always true
           if (val) {
           ^~~~~~~~~
   lib/dhry_run.c:59:9: note: initialize the variable 'ret' to silence this warning
           int ret;
                  ^
                   = 0
   1 warning generated.


vim +61 lib/dhry_run.c

    56	
    57	static int dhry_run_set(const char *val, const struct kernel_param *kp)
    58	{
    59		int ret;
    60	
  > 61		if (val) {
    62			ret = param_set_bool(val, kp);
    63			if (ret)
    64				return ret;
    65		} else {
    66			dhry_run = true;
    67		}
    68	
    69		if (dhry_run && system_state == SYSTEM_RUNNING)
    70			dhry_benchmark();
    71	
    72		return ret;
    73	}
    74	

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