linux-kernel - include/linux/mtd/cfi.h:62:2: warning: No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work.

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Date:   Mon, 18 Apr 2022 18:23:36 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mauro Lima <mauro.lima@...ypsium.com>,
        Boris Brezillon <bbrezillon@...nel.org>,
        Tudor Ambarus <tudor.ambarus@...rochip.com>
Subject: include/linux/mtd/cfi.h:62:2: warning: No CONFIG_MTD_CFI_Ix
 selected. No NOR chip support can work.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   b2d229d4ddb17db541098b83524d901257e93845
commit: e23e5a05d1fd9479586c40ffbcc056b3e34ef816 mtd: spi-nor: intel-spi: Convert to SPI MEM
date:   9 weeks ago
config: x86_64-randconfig-a014-20220418 (https://download.01.org/0day-ci/archive/20220418/202204181831.mZ5R0kZ8-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 429cbac0390654f90bba18a41799464adf31a5ec)
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e23e5a05d1fd9479586c40ffbcc056b3e34ef816
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout e23e5a05d1fd9479586c40ffbcc056b3e34ef816
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/spi/

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 >>):

   In file included from drivers/spi/spi-intel.c:13:
   In file included from include/linux/mtd/spi-nor.h:10:
>> include/linux/mtd/cfi.h:62:2: warning: No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work. [-W#warnings]
   #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work.
    ^
   1 warning generated.


vim +62 include/linux/mtd/cfi.h

^1da177e4c3f41 Linus Torvalds  2005-04-16  60  
241651d04d672f David Woodhouse 2007-09-06  61  #ifndef cfi_interleave
241651d04d672f David Woodhouse 2007-09-06 @62  #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work.
241651d04d672f David Woodhouse 2007-09-06  63  static inline int cfi_interleave(void *cfi)
241651d04d672f David Woodhouse 2007-09-06  64  {
241651d04d672f David Woodhouse 2007-09-06  65  	BUG();
241651d04d672f David Woodhouse 2007-09-06  66  	return 0;
241651d04d672f David Woodhouse 2007-09-06  67  }
241651d04d672f David Woodhouse 2007-09-06  68  #endif
241651d04d672f David Woodhouse 2007-09-06  69  

:::::: The code at line 62 was first introduced by commit
:::::: 241651d04d672fb685b2874707016cbbf95931e5 [MTD] Fix CFI build error when no map width or interleave supported

:::::: TO: David Woodhouse <dwmw2@...radead.org>
:::::: CC: David Woodhouse <dwmw2@...radead.org>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp