[mingo-tip:sched/headers 1824/2372] lib/memcat_p.c:10:8: warning: no previous prototype for '__memcat_p'

[kernel test robot]

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers
head:   67f8f45b4d0cf00f8e53fc1c2b50c67608ede063
commit: fdd4a8e803c246ee0751f572a078ffd97b73ba36 [1824/2372] headers/deps: smp: Optimize <linux/smp.h> dependencies, remove <linux/smp_api.h> inclusion
config: i386-tinyconfig (https://download.01.org/0day-ci/archive/20220108/202201081547.TX8B6yRX-lkp@xxxxxxxxx/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/mingo/tip.git/commit/?id=fdd4a8e803c246ee0751f572a078ffd97b73ba36
        git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git
        git fetch --no-tags mingo-tip sched/headers
        git checkout fdd4a8e803c246ee0751f572a078ffd97b73ba36
        # 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@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> lib/memcat_p.c:10:8: warning: no previous prototype for '__memcat_p' [-Wmissing-prototypes]
      10 | void **__memcat_p(void **a, void **b)
         |        ^~~~~~~~~~


vim +/__memcat_p +10 lib/memcat_p.c

93048c0944150b Alexander Shishkin 2018-10-16   4  
93048c0944150b Alexander Shishkin 2018-10-16   5  /*
93048c0944150b Alexander Shishkin 2018-10-16   6   * Merge two NULL-terminated pointer arrays into a newly allocated
93048c0944150b Alexander Shishkin 2018-10-16   7   * array, which is also NULL-terminated. Nomenclature is inspired by
93048c0944150b Alexander Shishkin 2018-10-16   8   * memset_p() and memcat() found elsewhere in the kernel source tree.
93048c0944150b Alexander Shishkin 2018-10-16   9   */
93048c0944150b Alexander Shishkin 2018-10-16 @10  void **__memcat_p(void **a, void **b)

:::::: The code at line 10 was first introduced by commit
:::::: 93048c0944150b316a15f92c41a4d626c8df37fd lib: Fix ia64 bootloader linkage

:::::: TO: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
:::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
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