tree:   https://git.kernel.org/pub/scm/linux/kernel/git/toke/linux.git xdp-queueing-01
head:   7cdc645073a59261514e56e1a4c6d0dac1b24b32
commit: 181bc9e4a64cc89cae2fe5b0091ed328383ad40c [1/9] Add a PIFO map type for queueing packets
config: openrisc-buildonly-randconfig-r003-20211111 (attached as .config)
compiler: or1k-linux-gcc (GCC) 11.2.0
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/toke/linux.git/commit/?id=181bc9e4a64cc89cae2fe5b0091ed328383ad40c
        git remote add toke https://git.kernel.org/pub/scm/linux/kernel/git/toke/linux.git
        git fetch --no-tags toke xdp-queueing-01
        git checkout 181bc9e4a64cc89cae2fe5b0091ed328383ad40c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=openrisc 

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 >>):

>> kernel/bpf/pifomap.c:197:6: error: no previous prototype for 'pifo_set_bit' [-Werror=missing-prototypes]
     197 | void pifo_set_bit(struct bpf_pifo_queue *queue, u32 rank)
         |      ^~~~~~~~~~~~
>> kernel/bpf/pifomap.c:208:6: error: no previous prototype for 'pifo_clear_bit' [-Werror=missing-prototypes]
     208 | void pifo_clear_bit(struct bpf_pifo_queue *queue, u32 rank)
         |      ^~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/pifo_set_bit +197 kernel/bpf/pifomap.c

   196	
 > 197	void pifo_set_bit(struct bpf_pifo_queue *queue, u32 rank)
   198	{
   199		u32 i;
   200	
   201		for (i = queue->levels; i > 0; i--) {
   202			unsigned long *bitmap = queue->lvl_bitmap[i-1];
   203			set_bit(rank, bitmap);
   204			rank /= BITS_PER_TYPE(long);
   205		}
   206	}
   207	
 > 208	void pifo_clear_bit(struct bpf_pifo_queue *queue, u32 rank)
   209	{
   210		u32 i;
   211	
   212		for (i = queue->levels; i > 0; i--) {
   213			unsigned long *bitmap = queue->lvl_bitmap[i-1];
   214			clear_bit(rank, bitmap);
   215			rank /= BITS_PER_TYPE(long);
   216	
   217			// another bit is set in this word, don't clear bit in higher
   218			// level
   219			if (*(bitmap + rank))
   220				break;
   221		}
   222	}
   223	

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