arch/arm/mach-s3c/gpio-samsung.c:1309:14: warning: no previous prototype for 's3c2410_modify_misccr'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cd1245d75ce93b8fd206f4b34eb58bcfe156d5e9
commit: 71b9114d2c13a648fbe6523dd859e611c316ad90 ARM: s3c: move into a common directory
date:   10 months ago
config: arm-randconfig-r031-20210609 (attached as .config)
compiler: arm-linux-gnueabi-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=71b9114d2c13a648fbe6523dd859e611c316ad90
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 71b9114d2c13a648fbe6523dd859e611c316ad90
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> arch/arm/mach-s3c/gpio-samsung.c:1309:14: warning: no previous prototype for 's3c2410_modify_misccr' [-Wmissing-prototypes]
    1309 | unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change)
         |              ^~~~~~~~~~~~~~~~~~~~~


vim +/s3c2410_modify_misccr +1309 arch/arm/mach-s3c/gpio-samsung.c

1b39d5f2cc5c28 drivers/gpio/gpio-samsung.c Kukjin Kim 2011-08-30  1307  
1b39d5f2cc5c28 drivers/gpio/gpio-samsung.c Kukjin Kim 2011-08-30  1308  #ifdef CONFIG_PLAT_S3C24XX
1b39d5f2cc5c28 drivers/gpio/gpio-samsung.c Kukjin Kim 2011-08-30 @1309  unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change)

:::::: The code at line 1309 was first introduced by commit
:::::: 1b39d5f2cc5c28085bbf48db80bf704ab4dedda9 gpio/samsung: gpio-samsung.c to support Samsung GPIOs

:::::: TO: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
:::::: CC: Kukjin Kim <kgene.kim@xxxxxxxxxxx>

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

Attachment: .config.gz
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