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Subject[toke:xdp-queueing-02 5/11] kernel/bpf/pifomap.c:197:6: warning: no previous prototype for 'pifo_set_bit'
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/toke/linux.git xdp-queueing-02
head: 26dde94b299bc277f7a99a99ba64b4363964e833
commit: 34cc5abfbae0dfcb6967c54cb80f7595bc9c5c37 [5/11] Add a PIFO map type for queueing packets
config: i386-randconfig-a003 (https://download.01.org/0day-ci/archive/20220214/202202140539.izxJMSE3-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/toke/linux.git/commit/?id=34cc5abfbae0dfcb6967c54cb80f7595bc9c5c37
git remote add toke https://git.kernel.org/pub/scm/linux/kernel/git/toke/linux.git
git fetch --no-tags toke xdp-queueing-02
git checkout 34cc5abfbae0dfcb6967c54cb80f7595bc9c5c37
# save the config file to linux build tree
mkdir build_dir
make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> kernel/bpf/pifomap.c:197:6: warning: no previous prototype for 'pifo_set_bit' [-Wmissing-prototypes]
197 | void pifo_set_bit(struct bpf_pifo_queue *queue, u32 rank)
| ^~~~~~~~~~~~
>> kernel/bpf/pifomap.c:208:6: warning: no previous prototype for 'pifo_clear_bit' [-Wmissing-prototypes]
208 | void pifo_clear_bit(struct bpf_pifo_queue *queue, u32 rank)
| ^~~~~~~~~~~~~~


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

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