linux-kernel - drivers/cpufreq/davinci-cpufreq.c:151:12: warning: no previous prototype for function 'davinci_cpufreq

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Message-ID: <202303080649.fobTolG2-lkp@intel.com>
Date:   Wed, 8 Mar 2023 06:35:44 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: drivers/cpufreq/davinci-cpufreq.c:151:12: warning: no previous
 prototype for function 'davinci_cpufreq_init'

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8ca09d5fa3549d142c2080a72a4c70ce389163cd
commit: 250c1a694ff304e5d69e74ab32755eddcc2b8f65 ARM: pxa: convert to multiplatform
date:   10 months ago
config: arm-randconfig-r046-20230307 (https://download.01.org/0day-ci/archive/20230308/202303080649.fobTolG2-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=250c1a694ff304e5d69e74ab32755eddcc2b8f65
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 250c1a694ff304e5d69e74ab32755eddcc2b8f65
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/clk/ drivers/cpufreq/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303080649.fobTolG2-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/cpufreq/davinci-cpufreq.c:151:12: warning: no previous prototype for function 'davinci_cpufreq_init' [-Wmissing-prototypes]
   int __init davinci_cpufreq_init(void)
              ^
   drivers/cpufreq/davinci-cpufreq.c:151:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int __init davinci_cpufreq_init(void)
   ^
   static 
   1 warning generated.


vim +/davinci_cpufreq_init +151 drivers/cpufreq/davinci-cpufreq.c

6601b8030de3e9c arch/arm/mach-davinci/cpufreq.c Sekhar Nori 2009-09-22  150  
3aa3e8407ae9023 arch/arm/mach-davinci/cpufreq.c Shawn Guo   2012-04-26 @151  int __init davinci_cpufreq_init(void)
6601b8030de3e9c arch/arm/mach-davinci/cpufreq.c Sekhar Nori 2009-09-22  152  {
6601b8030de3e9c arch/arm/mach-davinci/cpufreq.c Sekhar Nori 2009-09-22  153  	return platform_driver_probe(&davinci_cpufreq_driver,
6601b8030de3e9c arch/arm/mach-davinci/cpufreq.c Sekhar Nori 2009-09-22  154  							davinci_cpufreq_probe);
6601b8030de3e9c arch/arm/mach-davinci/cpufreq.c Sekhar Nori 2009-09-22  155  }
6601b8030de3e9c arch/arm/mach-davinci/cpufreq.c Sekhar Nori 2009-09-22  156  

:::::: The code at line 151 was first introduced by commit
:::::: 3aa3e8407ae9023c5ff59bf5c81fc2553c31eb70 ARM: davinci: use machine specific hook for late init

:::::: TO: Shawn Guo <shawn.guo@...aro.org>
:::::: CC: Shawn Guo <shawn.guo@...aro.org>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests