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Date:   Mon, 21 Feb 2022 03:07:42 +0800
From:   kernel test robot <lkp@...el.com>
To:     Michael Walle <michael@...le.cc>, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Pratyush Yadav <p.yadav@...com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        yaliang.wang@...driver.com, Michael Walle <michael@...le.cc>
Subject: Re: [PATCH v2 14/32] mtd: spi-nor: winbond: unify function names

Hi Michael,

I love your patch! Perhaps something to improve:

[auto build test WARNING on mtd/spi-nor/next]
[also build test WARNING on tip/master linux/master linus/master v5.17-rc4 next-20220217]
[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/0day-ci/linux/commits/Michael-Walle/mtd-spi-nor-move-vendor-specific-code-into-vendor-modules/20220220-192832
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git spi-nor/next
config: alpha-randconfig-r034-20220220 (https://download.01.org/0day-ci/archive/20220221/202202210301.BeYSA7Ny-lkp@intel.com/config)
compiler: alpha-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/0day-ci/linux/commit/c09cbfe090ed6015773211aad1bd2387dd958b7a
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Michael-Walle/mtd-spi-nor-move-vendor-specific-code-into-vendor-modules/20220220-192832
        git checkout c09cbfe090ed6015773211aad1bd2387dd958b7a
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=alpha SHELL=/bin/bash drivers/mtd/spi-nor/

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

All warnings (new ones prefixed by >>):

>> drivers/mtd/spi-nor/winbond.c:141: warning: expecting prototype for winbond_set_4byte_addr_mode(). Prototype was for winbond_nor_set_4byte_addr_mode() instead


vim +141 drivers/mtd/spi-nor/winbond.c

7b8b22010af95f Boris Brezillon 2020-03-13  131  
7b8b22010af95f Boris Brezillon 2020-03-13  132  /**
7b8b22010af95f Boris Brezillon 2020-03-13  133   * winbond_set_4byte_addr_mode() - Set 4-byte address mode for Winbond flashes.
7b8b22010af95f Boris Brezillon 2020-03-13  134   * @nor:	pointer to 'struct spi_nor'.
7b8b22010af95f Boris Brezillon 2020-03-13  135   * @enable:	true to enter the 4-byte address mode, false to exit the 4-byte
7b8b22010af95f Boris Brezillon 2020-03-13  136   *		address mode.
7b8b22010af95f Boris Brezillon 2020-03-13  137   *
7b8b22010af95f Boris Brezillon 2020-03-13  138   * Return: 0 on success, -errno otherwise.
7b8b22010af95f Boris Brezillon 2020-03-13  139   */
c09cbfe090ed60 Michael Walle   2022-02-18  140  static int winbond_nor_set_4byte_addr_mode(struct spi_nor *nor, bool enable)
7b8b22010af95f Boris Brezillon 2020-03-13 @141  {
7b8b22010af95f Boris Brezillon 2020-03-13  142  	int ret;
7b8b22010af95f Boris Brezillon 2020-03-13  143  
7b8b22010af95f Boris Brezillon 2020-03-13  144  	ret = spi_nor_set_4byte_addr_mode(nor, enable);
7b8b22010af95f Boris Brezillon 2020-03-13  145  	if (ret || enable)
7b8b22010af95f Boris Brezillon 2020-03-13  146  		return ret;
7b8b22010af95f Boris Brezillon 2020-03-13  147  
7b8b22010af95f Boris Brezillon 2020-03-13  148  	/*
7b8b22010af95f Boris Brezillon 2020-03-13  149  	 * On Winbond W25Q256FV, leaving 4byte mode causes the Extended Address
7b8b22010af95f Boris Brezillon 2020-03-13  150  	 * Register to be set to 1, so all 3-byte-address reads come from the
7b8b22010af95f Boris Brezillon 2020-03-13  151  	 * second 16M. We must clear the register to enable normal behavior.
7b8b22010af95f Boris Brezillon 2020-03-13  152  	 */
7b8b22010af95f Boris Brezillon 2020-03-13  153  	ret = spi_nor_write_enable(nor);
7b8b22010af95f Boris Brezillon 2020-03-13  154  	if (ret)
7b8b22010af95f Boris Brezillon 2020-03-13  155  		return ret;
7b8b22010af95f Boris Brezillon 2020-03-13  156  
7b8b22010af95f Boris Brezillon 2020-03-13  157  	ret = spi_nor_write_ear(nor, 0);
7b8b22010af95f Boris Brezillon 2020-03-13  158  	if (ret)
7b8b22010af95f Boris Brezillon 2020-03-13  159  		return ret;
7b8b22010af95f Boris Brezillon 2020-03-13  160  
7b8b22010af95f Boris Brezillon 2020-03-13  161  	return spi_nor_write_disable(nor);
7b8b22010af95f Boris Brezillon 2020-03-13  162  }
7b8b22010af95f Boris Brezillon 2020-03-13  163  

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

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