[microchip-ung-linux-upstream:v5.10-webstax 66/88] drivers/spi/spi-vcoreiii.c:240:5: warning: no previous prototype for function 'vcoreiii_bb_transfer_one_message'

[microchip-ung-linux-upstream:v5.10-webstax 66/88] drivers/spi/spi-vcoreiii.c:240:5: warning: no previous prototype for function 'vcoreiii_bb_transfer_one_message'

[kernel test robot]

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tree:   https://github.com/microchip-ung/linux-upstream.git v5.10-webstax
head:   0c603c93d534e71ceee9485bfe1b0b75561efb0e
commit: e4904df0bc6023a8a456bb9ca9b6aa7af74c9bc6 [66/88] spi: vcoreiii: Add MSCC vcoreiii bitbang driver
config: mips-randconfig-r025-20201214 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project d38205144febf4dc42c9270c6aa3d978f1ef65e1)
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-mips-linux-gnu
        # https://github.com/microchip-ung/linux-upstream/commit/e4904df0bc6023a8a456bb9ca9b6aa7af74c9bc6
        git remote add microchip-ung-linux-upstream https://github.com/microchip-ung/linux-upstream.git
        git fetch --no-tags microchip-ung-linux-upstream v5.10-webstax
        git checkout e4904df0bc6023a8a456bb9ca9b6aa7af74c9bc6
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips 

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/spi/spi-vcoreiii.c:240:5: warning: no previous prototype for function 'vcoreiii_bb_transfer_one_message' [-Wmissing-prototypes]
   int vcoreiii_bb_transfer_one_message(struct spi_master *master,
       ^
   drivers/spi/spi-vcoreiii.c:240:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int vcoreiii_bb_transfer_one_message(struct spi_master *master,
   ^
   static 
   1 warning generated.

vim +/vcoreiii_bb_transfer_one_message +240 drivers/spi/spi-vcoreiii.c

   239	
 > 240	int vcoreiii_bb_transfer_one_message(struct spi_master *master,
   241					     struct spi_message *msg)
   242	{
   243		struct spi_vcoreiii *p = spi_master_get_devdata(master);
   244		struct spi_device *spi = msg->spi;
   245		unsigned int total_len = 0;
   246		struct spi_transfer *xfer;
   247	
   248		vcoreiii_bb_cs_activate(p, spi);
   249	
   250		list_for_each_entry(xfer, &msg->transfers, transfer_list) {
   251			bool last_xfer = list_is_last(&xfer->transfer_list,
   252						      &msg->transfers);
   253			vcoreiii_bb_do_transfer(p, msg, xfer, last_xfer);
   254			total_len += xfer->len;
   255		}
   256	
   257		vcoreiii_bb_cs_deactivate(p, spi);
   258	
   259		msg->status = 0;
   260		msg->actual_length = total_len;
   261		spi_finalize_current_message(master);
   262		return msg->status;
   263	}
   264	

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

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