Hi Andrew, It's probably a bug fix that unveils the link errors. tree: feng/linux-mm head: 650a37b8fc9316c2e910099058345db7591708f9 commit: c15130ebef2f485bf34b42d78b7a6f4aad621bd3 [452/660] linux-next-rejects config: powerpc64-randconfig-r012-20200602 (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 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 git checkout c15130ebef2f485bf34b42d78b7a6f4aad621bd3 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>, old ones prefixed by <<): powerpc64-linux-ld: arch/powerpc/platforms/cell/spufs/file.o: in function `spufs_dump_emit': >> arch/powerpc/platforms/cell/spufs/file.c:136: undefined reference to `.dump_emit' >> powerpc64-linux-ld: arch/powerpc/platforms/cell/spufs/file.c:136: undefined reference to `.dump_emit' >> powerpc64-linux-ld: arch/powerpc/platforms/cell/spufs/file.c:136: undefined reference to `.dump_emit' >> powerpc64-linux-ld: arch/powerpc/platforms/cell/spufs/file.c:136: undefined reference to `.dump_emit' >> powerpc64-linux-ld: arch/powerpc/platforms/cell/spufs/file.c:136: undefined reference to `.dump_emit' powerpc64-linux-ld: arch/powerpc/platforms/cell/spufs/file.o:arch/powerpc/platforms/cell/spufs/file.c:136: more undefined references to `.dump_emit' follow vim +136 arch/powerpc/platforms/cell/spufs/file.c 197b1a8263bf36 Christoph Hellwig 2007-12-20 132 b043443263bd4d Andrew Morton 2020-05-26 133 static ssize_t spufs_dump_emit(struct coredump_params *cprm, void *buf, b043443263bd4d Andrew Morton 2020-05-26 134 size_t size) b043443263bd4d Andrew Morton 2020-05-26 135 { b043443263bd4d Andrew Morton 2020-05-26 @136 if (!dump_emit(cprm, buf, size)) b043443263bd4d Andrew Morton 2020-05-26 137 return -EIO; b043443263bd4d Andrew Morton 2020-05-26 138 return size; b043443263bd4d Andrew Morton 2020-05-26 139 } b043443263bd4d Andrew Morton 2020-05-26 140 :::::: The code at line 136 was first introduced by commit :::::: b043443263bd4d6f403cd35e2c142587f4bb0766 linux-next :::::: TO: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> :::::: CC: Johannes Weiner <hannes@xxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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