[PATCH 5/6] mtd: spi-nor: add generic flash driver

[kernel test robot]

Hi Michael,

I love your patch! Perhaps something to improve:

[auto build test WARNING on mtd/spi-nor/next]
[also build test WARNING on next-20220513]
[cannot apply to linux/master linus/master v5.18-rc6]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/intel-lab-lkp/linux/commits/Michael-Walle/mtd-spi-nor-generic-flash-driver/20220513-214238
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git spi-nor/next
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20220513/202205132220.uRTFaqNA-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 11.3.0
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://github.com/intel-lab-lkp/linux/commit/d38c0ac1528d85bea65fc5a9e7f61a10dbc051fb
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Michael-Walle/mtd-spi-nor-generic-flash-driver/20220513-214238
        git checkout d38c0ac1528d85bea65fc5a9e7f61a10dbc051fb
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/mtd/spi-nor/

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

All warnings (new ones prefixed by >>):

>> drivers/mtd/spi-nor/sfdp.c:1260: warning: expecting prototype for spi_nor_check_sfdp_header(). Prototype was for spi_nor_check_sfdp_signature() instead


vim +1260 drivers/mtd/spi-nor/sfdp.c

  1249	
  1250	/**
  1251	 * spi_nor_check_sfdp_header() - check for a valid SFDP header
  1252	 * @nor:		pointer to a 'struct spi_nor'
  1253	 *
  1254	 * Used to detect if the flash supports the RDSFDP command as well as the
  1255	 * presence of a valid SFDP table.
  1256	 *
  1257	 * Return: 0 on success, -errno otherwise.
  1258	 */
  1259	int spi_nor_check_sfdp_signature(struct spi_nor *nor)
> 1260	{
  1261		u32 signature;
  1262		int err;
  1263	
  1264		/* Get the SFDP header. */
  1265		err = spi_nor_read_sfdp_dma_unsafe(nor, 0, sizeof(signature),
  1266						   &signature);
  1267		if (err < 0)
  1268			return err;
  1269	
  1270		/* Check the SFDP signature. */
  1271		if (le32_to_cpu(signature) != SFDP_SIGNATURE)
  1272			return -EINVAL;
  1273	
  1274		return 0;
  1275	}
  1276	

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https://01.org/lkp