tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   79a106fc6585979022012e65a1e45e3d2d28b77b
commit: 665d8d58761cba41147fe7e98e2ceed1cbf603a2 powerpc/akebono: Fix unmet dependency errors
date:   3 months ago
config: powerpc64-randconfig-r023-20210521 (attached as .config)
compiler: powerpc-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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=665d8d58761cba41147fe7e98e2ceed1cbf603a2
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 665d8d58761cba41147fe7e98e2ceed1cbf603a2
        # 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: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   powerpc-linux-ld: arch/powerpc/boot/wrapper.a(decompress.o): in function `partial_decompress':
>> decompress.c:(.text+0x1f0): undefined reference to `__decompress'

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