[kbuild-all] mm/page_alloc.c:3480:15: warning: no previous prototype for 'should_fail_alloc_page'

Hi Alexei, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: debe436e77c72fcee804fb867f275e6d31aa999c commit: 76cd61739fd107a7f7ec4c24a045e98d8ee150f0 mm/error_inject: Fix allow_error_inject function signatures. date: 1 year, 2 months ago config: nds32-buildonly-randconfig-r002-20210927 (attached as .config) compiler: nds32le-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/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 76cd61739fd107a7f7ec4c24a045e98d8ee150f0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 3480 | noinline bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order) | ^~~~~~~~~~~~~~~~~~~~~~ mm/page_alloc.c:6120:23: warning: no previous prototype for 'memmap_init' [-Wmissing-prototypes] 6120 | void __meminit __weak memmap_init(unsigned long size, int nid, | ^~~~~~~~~~~ vim +/should_fail_alloc_page +3480 mm/page_alloc.c 3479 3481 { 3482 return __should_fail_alloc_page(gfp_mask, order); 3483 } 3484 ALLOW_ERROR_INJECTION(should_fail_alloc_page, TRUE); 3485 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org