Hi Syed,

I love your patch! Yet something to improve:

[auto build test ERROR on bbe2ba04c5a92a49db8a42c850a5a2f6481e47eb]

url:    https://github.com/0day-ci/linux/commits/Syed-Nayyar-Waris/Introduce-the-for_each_set_clump-macro/20201226-144926
base:    bbe2ba04c5a92a49db8a42c850a5a2f6481e47eb
config: s390-allyesconfig (attached as .config)
compiler: s390-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://github.com/0day-ci/linux/commit/ceadf04c7029acf863c15e72133acfbec3601aba
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Syed-Nayyar-Waris/Introduce-the-for_each_set_clump-macro/20201226-144926
        git checkout ceadf04c7029acf863c15e72133acfbec3601aba
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 

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 >>):

   s390-linux-ld: lib/test_bitmap.o: in function `test_bitmap_init':
   test_bitmap.c:(.init.text+0x25fe): undefined reference to `find_next_clump'
   s390-linux-ld: test_bitmap.c:(.init.text+0x27f0): undefined reference to `find_next_clump'
   s390-linux-ld: drivers/gpio/gpio-thunderx.o: in function `thunderx_gpio_set_multiple':
>> gpio-thunderx.c:(.text+0x734): undefined reference to `find_next_clump'
>> s390-linux-ld: gpio-thunderx.c:(.text+0x850): undefined reference to `find_next_clump'

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