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

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@linux.intel.com>
:::::: CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

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