[stffrdhrn:or1k-5.15-litex-sdcard 1/1] drivers/mmc/host/litex_mmc.c:96:6: error: no previous prototype for 'sdclk_set_clk'

[kernel test robot]

tree:   https://github.com/stffrdhrn/linux.git or1k-5.15-litex-sdcard
head:   9802d0ed2e47ab8b2c6c3e82c4f41591ec11f958
commit: 9802d0ed2e47ab8b2c6c3e82c4f41591ec11f958 [1/1] LiteX: driver for LiteSDCard (litex_mmc)
config: powerpc-allyesconfig (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 11.2.0
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://github.com/stffrdhrn/linux/commit/9802d0ed2e47ab8b2c6c3e82c4f41591ec11f958
        git remote add stffrdhrn https://github.com/stffrdhrn/linux.git
        git fetch --no-tags stffrdhrn or1k-5.15-litex-sdcard
        git checkout 9802d0ed2e47ab8b2c6c3e82c4f41591ec11f958
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=powerpc 

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

All errors (new ones prefixed by >>):

>> drivers/mmc/host/litex_mmc.c:96:6: error: no previous prototype for 'sdclk_set_clk' [-Werror=missing-prototypes]
      96 | void sdclk_set_clk(struct litex_mmc_host *host, unsigned int clk_freq) {
         |      ^~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/sdclk_set_clk +96 drivers/mmc/host/litex_mmc.c

    94	
    95	
  > 96	void sdclk_set_clk(struct litex_mmc_host *host, unsigned int clk_freq) {
    97		u32 div = clk_freq ? host->freq / clk_freq : 256;
    98		div = roundup_pow_of_two(div);
    99		div = min(max(div, (u32)2), (u32)256);
   100		dev_info(&host->dev->dev,
   101			"Requested clk_freq=%d: set to %d via div=%d\n",
   102			clk_freq, host->freq / div, div);
   103		litex_write16(host->sdphy + LITEX_MMC_SDPHY_CLOCKERDIV_OFF, div);
   104	}
   105	

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

Attachment: .config.gz
Description: application/gzip