[android-common:android12-5.10 1/2] drivers/mmc/core/mmc.c:975:6: warning: no previous prototype for 'mmc_set_bus_speed'

[android-common:android12-5.10 1/2] drivers/mmc/core/mmc.c:975:6: warning: no previous prototype for 'mmc_set_bus_speed'

[kernel test robot]

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tree:   https://android.googlesource.com/kernel/common android12-5.10
head:   f90feddc7e0eb0c724dd392e97e46ccce8b5f6fd
commit: 072eded7ca22f1dff8f7e151c46274352a8bbf57 [1/2] FROMLIST: mmc: core: Export core functions required for clk scaling
config: x86_64-randconfig-c022-20210825 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        git remote add android-common https://android.googlesource.com/kernel/common
        git fetch --no-tags android-common android12-5.10
        git checkout 072eded7ca22f1dff8f7e151c46274352a8bbf57
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> drivers/mmc/core/mmc.c:975:6: warning: no previous prototype for 'mmc_set_bus_speed' [-Wmissing-prototypes]
     975 | void mmc_set_bus_speed(struct mmc_card *card)
         |      ^~~~~~~~~~~~~~~~~


vim +/mmc_set_bus_speed +975 drivers/mmc/core/mmc.c

   971	
   972	/*
   973	 * Set the bus speed for the selected speed mode.
   974	 */
 > 975	void mmc_set_bus_speed(struct mmc_card *card)
   976	{
   977		unsigned int max_dtr = (unsigned int)-1;
   978	
   979		if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
   980		     max_dtr > card->ext_csd.hs200_max_dtr)
   981			max_dtr = card->ext_csd.hs200_max_dtr;
   982		else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr)
   983			max_dtr = card->ext_csd.hs_max_dtr;
   984		else if (max_dtr > card->csd.max_dtr)
   985			max_dtr = card->csd.max_dtr;
   986	
   987		mmc_set_clock(card->host, max_dtr);
   988	}
   989	

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

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