linux-kernel - arch/mips/loongson32/common/time.c:50:13: warning: no previous prototype for function 'ls1x_pwmtimer

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Message-ID: <202212080956.MUEgpvb0-lkp@intel.com>
Date:   Thu, 8 Dec 2022 09:37:19 +0800
From:   kernel test robot <lkp@...el.com>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Subject: arch/mips/loongson32/common/time.c:50:13: warning: no previous
 prototype for function 'ls1x_pwmtimer_init'

Hi Paul,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8ed710da2873c2aeb3bb805864a699affaf1d03b
commit: c434b9f80b0923e6460031b0fd964f8b0bf3c6a6 MIPS: Kconfig: add MIPS_GENERIC_KERNEL symbol
date:   2 years, 3 months ago
config: mips-buildonly-randconfig-r005-20221208
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 mips cross compiling tool for clang build
        # apt-get install binutils-mipsel-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c434b9f80b0923e6460031b0fd964f8b0bf3c6a6
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout c434b9f80b0923e6460031b0fd964f8b0bf3c6a6
        # 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=mips SHELL=/bin/bash arch/mips/loongson32/common/ lib/zstd/

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/mips/loongson32/common/time.c:50:13: warning: no previous prototype for function 'ls1x_pwmtimer_init' [-Wmissing-prototypes]
   void __init ls1x_pwmtimer_init(void)
               ^
   arch/mips/loongson32/common/time.c:50:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init ls1x_pwmtimer_init(void)
   ^
   static 
   1 warning generated.


vim +/ls1x_pwmtimer_init +50 arch/mips/loongson32/common/time.c

c5d58e9e79dd8d arch/mips/loongson1/common/time.c  Kelvin Cheung     2014-10-10  49  
c5d58e9e79dd8d arch/mips/loongson1/common/time.c  Kelvin Cheung     2014-10-10 @50  void __init ls1x_pwmtimer_init(void)
c5d58e9e79dd8d arch/mips/loongson1/common/time.c  Kelvin Cheung     2014-10-10  51  {
4bdc0d676a6431 arch/mips/loongson32/common/time.c Christoph Hellwig 2020-01-06  52  	timer_reg_base = ioremap(LS1X_TIMER_BASE, SZ_16);
9ec88b60cb481a arch/mips/loongson32/common/time.c Kelvin Cheung     2016-04-06  53  	if (!timer_reg_base)
c5d58e9e79dd8d arch/mips/loongson1/common/time.c  Kelvin Cheung     2014-10-10  54  		panic("Failed to remap timer registers");
c5d58e9e79dd8d arch/mips/loongson1/common/time.c  Kelvin Cheung     2014-10-10  55  
c5d58e9e79dd8d arch/mips/loongson1/common/time.c  Kelvin Cheung     2014-10-10  56  	ls1x_jiffies_per_tick = DIV_ROUND_CLOSEST(mips_hpt_frequency, HZ);
c5d58e9e79dd8d arch/mips/loongson1/common/time.c  Kelvin Cheung     2014-10-10  57  
c5d58e9e79dd8d arch/mips/loongson1/common/time.c  Kelvin Cheung     2014-10-10  58  	ls1x_pwmtimer_set_period(ls1x_jiffies_per_tick);
c5d58e9e79dd8d arch/mips/loongson1/common/time.c  Kelvin Cheung     2014-10-10  59  	ls1x_pwmtimer_restart();
c5d58e9e79dd8d arch/mips/loongson1/common/time.c  Kelvin Cheung     2014-10-10  60  }
c5d58e9e79dd8d arch/mips/loongson1/common/time.c  Kelvin Cheung     2014-10-10  61  

:::::: The code at line 50 was first introduced by commit
:::::: c5d58e9e79dd8d687454915fc4e845434f973175 MIPS: Loongson1B: Add a clockevent/clocksource using PWM Timer

:::::: TO: Kelvin Cheung <keguang.zhang@...il.com>
:::::: CC: Ralf Baechle <ralf@...ux-mips.org>

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

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