linux-kernel - arch/arm/mach-pxa/balloon3.c:85:12: warning: no previous prototype for function 'parse_balloon3

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Message-ID: <202212100048.ZrN2beVs-lkp@intel.com>
Date:   Sat, 10 Dec 2022 00:40:20 +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: arch/arm/mach-pxa/balloon3.c:85:12: warning: no previous prototype
 for function 'parse_balloon3_features'

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0d1409e4ff08aa4a9a254d3f723410db32aa7552
commit: 8c1fb11b8a77dc489a8ef6d96c38c1297b629d06 ARM: s3c: enable s3c24xx multiplatform support
date:   8 months ago
config: arm-randconfig-r025-20221209
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 6e4cea55f0d1104408b26ac574566a0e4de48036)
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=8c1fb11b8a77dc489a8ef6d96c38c1297b629d06
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 8c1fb11b8a77dc489a8ef6d96c38c1297b629d06
        # 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 SHELL=/bin/bash arch/arm/mach-mmp/ arch/arm/mach-pxa/ drivers/hwmon/ drivers/video/backlight/

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 >>):

>> arch/arm/mach-pxa/balloon3.c:85:12: warning: no previous prototype for function 'parse_balloon3_features' [-Wmissing-prototypes]
   int __init parse_balloon3_features(char *arg)
              ^
   arch/arm/mach-pxa/balloon3.c:85:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int __init parse_balloon3_features(char *arg)
   ^
   static 
   1 warning generated.
--
>> arch/arm/mach-pxa/trizeps4.c:279:6: warning: no previous prototype for function 'board_pcmcia_power' [-Wmissing-prototypes]
   void board_pcmcia_power(int power)
        ^
   arch/arm/mach-pxa/trizeps4.c:279:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void board_pcmcia_power(int power)
   ^
   static 
   1 warning generated.
--
>> arch/arm/mach-pxa/corgi_pm.c:137:15: warning: no previous prototype for function 'corgipm_read_devdata' [-Wmissing-prototypes]
   unsigned long corgipm_read_devdata(int type)
                 ^
   arch/arm/mach-pxa/corgi_pm.c:137:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   unsigned long corgipm_read_devdata(int type)
   ^
   static 
   1 warning generated.
--
>> arch/arm/mach-pxa/spitz_pm.c:170:15: warning: no previous prototype for function 'spitzpm_read_devdata' [-Wmissing-prototypes]
   unsigned long spitzpm_read_devdata(int type)
                 ^
   arch/arm/mach-pxa/spitz_pm.c:170:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   unsigned long spitzpm_read_devdata(int type)
   ^
   static 
   1 warning generated.
--
>> drivers/hwmon/max1111.c:83:5: warning: no previous prototype for function 'max1111_read_channel' [-Wmissing-prototypes]
   int max1111_read_channel(int channel)
       ^
   drivers/hwmon/max1111.c:83:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int max1111_read_channel(int channel)
   ^
   static 
   1 warning generated.
--
>> drivers/video/backlight/tosa_lcd.c:143:5: warning: no previous prototype for function 'tosa_lcd_set_power' [-Wmissing-prototypes]
   int tosa_lcd_set_power(struct lcd_device *lcd, int power)
       ^
   drivers/video/backlight/tosa_lcd.c:143:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int tosa_lcd_set_power(struct lcd_device *lcd, int power)
   ^
   static 
   1 warning generated.


vim +/parse_balloon3_features +85 arch/arm/mach-pxa/balloon3.c

12a2449c7968696 Marek Vasut   2010-07-27  84  
12a2449c7968696 Marek Vasut   2010-07-27 @85  int __init parse_balloon3_features(char *arg)
12a2449c7968696 Marek Vasut   2010-07-27  86  {
12a2449c7968696 Marek Vasut   2010-07-27  87  	if (!arg)
12a2449c7968696 Marek Vasut   2010-07-27  88  		return 0;
12a2449c7968696 Marek Vasut   2010-07-27  89  
4fce45b44bdbf29 Daniel Walter 2014-08-08  90  	return kstrtoul(arg, 0, &balloon3_features_present);
12a2449c7968696 Marek Vasut   2010-07-27  91  }
12a2449c7968696 Marek Vasut   2010-07-27  92  early_param("balloon3_features", parse_balloon3_features);
12a2449c7968696 Marek Vasut   2010-07-27  93  

:::::: The code at line 85 was first introduced by commit
:::::: 12a2449c79686964a36b17175970a8e1c19b4cf7 [ARM] pxa/balloon3: Machine file cleanup

:::::: TO: Marek Vasut <marek.vasut@...il.com>
:::::: CC: Eric Miao <eric.y.miao@...il.com>

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

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