linux-kernel - arch/mips/loongson2ef/common/cs5536/cs5536_mfgpt.c:195:12: warning: no previous prototype for 'init_mfgpt

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Message-ID: <202106251340.J1wMwDOh-lkp@intel.com>
Date:   Fri, 25 Jun 2021 13:00:58 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jiaxun Yang <jiaxun.yang@...goat.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Subject: arch/mips/loongson2ef/common/cs5536/cs5536_mfgpt.c:195:12: warning:
 no previous prototype for 'init_mfgpt_clocksource'

Hi Jiaxun,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   44db63d1ad8d71c6932cbe007eb41f31c434d140
commit: b13812ddea615b6507beef24f76540c0c1143c5c MIPS: Loongson2ef: Disable Loongson MMI instructions
date:   9 months ago
config: mips-randconfig-r021-20210625 (attached as .config)
compiler: mips64el-linux-gcc (GCC) 9.3.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b13812ddea615b6507beef24f76540c0c1143c5c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout b13812ddea615b6507beef24f76540c0c1143c5c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

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 >>):

>> arch/mips/loongson2ef/common/cs5536/cs5536_mfgpt.c:195:12: warning: no previous prototype for 'init_mfgpt_clocksource' [-Wmissing-prototypes]
     195 | int __init init_mfgpt_clocksource(void)
         |            ^~~~~~~~~~~~~~~~~~~~~~


vim +/init_mfgpt_clocksource +195 arch/mips/loongson2ef/common/cs5536/cs5536_mfgpt.c

916daba8a9f261 arch/mips/loongson/common/cs5536/cs5536_mfgpt.c Wu Zhangjin 2009-11-17  194  
916daba8a9f261 arch/mips/loongson/common/cs5536/cs5536_mfgpt.c Wu Zhangjin 2009-11-17 @195  int __init init_mfgpt_clocksource(void)
916daba8a9f261 arch/mips/loongson/common/cs5536/cs5536_mfgpt.c Wu Zhangjin 2009-11-17  196  {
916daba8a9f261 arch/mips/loongson/common/cs5536/cs5536_mfgpt.c Wu Zhangjin 2009-11-17  197  	if (num_possible_cpus() > 1)	/* MFGPT does not scale! */
916daba8a9f261 arch/mips/loongson/common/cs5536/cs5536_mfgpt.c Wu Zhangjin 2009-11-17  198  		return 0;
916daba8a9f261 arch/mips/loongson/common/cs5536/cs5536_mfgpt.c Wu Zhangjin 2009-11-17  199  
75c4fd8c7862f3 arch/mips/loongson/common/cs5536/cs5536_mfgpt.c John Stultz 2010-04-26  200  	return clocksource_register_hz(&clocksource_mfgpt, MFGPT_TICK_RATE);
916daba8a9f261 arch/mips/loongson/common/cs5536/cs5536_mfgpt.c Wu Zhangjin 2009-11-17  201  }
916daba8a9f261 arch/mips/loongson/common/cs5536/cs5536_mfgpt.c Wu Zhangjin 2009-11-17  202  

:::::: The code at line 195 was first introduced by commit
:::::: 916daba8a9f2617ded8b9255e6b39f066ef60178 MIPS: Lemote 2F: Add cs5536 MFGPT timer support

:::::: TO: Wu Zhangjin <wuzhangjin@...il.com>
:::::: CC: Ralf Baechle <ralf@...ux-mips.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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