[xlnx:master 11924/12130] include/linux/mtd/cfi.h:62:2: warning: No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work.

[kernel test robot]

tree:   https://github.com/Xilinx/linux-xlnx master
head:   0605a36e057480f3a83ae401e7ff59739da78e82
commit: 581b2657c262a341cf5daebea9e1a55e0289a08b [11924/12130] spi: spi-zynq-qspi: Add dual parallal and stacked support
config: arm64-randconfig-r022-20210421 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d87b9b81ccb95217181ce75515c6c68bbb408ca4)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/Xilinx/linux-xlnx/commit/581b2657c262a341cf5daebea9e1a55e0289a08b
        git remote add xlnx https://github.com/Xilinx/linux-xlnx
        git fetch --no-tags xlnx master
        git checkout 581b2657c262a341cf5daebea9e1a55e0289a08b
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 

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 >>):

   In file included from drivers/spi/spi-mem.c:10:
   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 at infradead.org>
:::::: CC: David Woodhouse <dwmw2 at infradead.org>

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