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/581b2657c262a341cf5daebea9e1a... 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(a)intel.com&gt; 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: #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(a)infradead.org&gt; :::::: CC: David Woodhouse <dwmw2(a)infradead.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org