linux-kernel - [mingo-tip:sched/headers 1933/2579] lib/memcat_p.c:10:8: warning: no previous prototype for function '__memcat

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Date:   Thu, 21 Apr 2022 21:01:39 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [mingo-tip:sched/headers 1933/2579] lib/memcat_p.c:10:8: warning: no
 previous prototype for function '__memcat_p'

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers
head:   49e1ec6c70a6eb4b7de9250a455b8b63eb42afbe
commit: b17c57b9f326f544a10178f2be4c886c4b02b4f3 [1933/2579] headers/deps: smp: Optimize <linux/smp.h> dependencies, remove <linux/smp_api.h> inclusion
config: mips-randconfig-r026-20220419 (https://download.01.org/0day-ci/archive/20220421/202204212135.0nRWoKwW-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c1c49a356162b22554088d269f7689bdb044a9f1)
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
        # install mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/commit/?id=b17c57b9f326f544a10178f2be4c886c4b02b4f3
        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 b17c57b9f326f544a10178f2be4c886c4b02b4f3
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

>> lib/memcat_p.c:10:8: warning: no previous prototype for function '__memcat_p' [-Wmissing-prototypes]
   void **__memcat_p(void **a, void **b)
          ^
   lib/memcat_p.c:10:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void **__memcat_p(void **a, void **b)
   ^
   static 
   1 warning generated.


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@...ux.intel.com>
:::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp