[kbuild-all] [shenki:ppc-kfence 7/7] arch/powerpc/mm/book3s64/hash_utils.c:1986:6: warning: no previous prototype for 'hash__kfence_protect_page'

tree: https://github.com/shenki/linux ppc-kfence head: 916a8df9850da81d89e53f0b4b91bbb41dc2923f commit: 916a8df9850da81d89e53f0b4b91bbb41dc2923f [7/7] WIP: powerpc: Fix kfence for book3s64 radix mmu config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 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://github.com/shenki/linux/commit/916a8df9850da81d89e53f0b4b91bbb41d... git remote add shenki https://github.com/shenki/linux git fetch --no-tags shenki ppc-kfence git checkout 916a8df9850da81d89e53f0b4b91bbb41dc2923f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 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 >>): 1986 | bool hash__kfence_protect_page(unsigned long addr, bool protect) | ^~~~~~~~~~~~~~~~~~~~~~~~~ vim +/hash__kfence_protect_page +1986 arch/powerpc/mm/book3s64/hash_utils.c 1984 1985 #ifdef CONFIG_KFENCE 1987 { 1988 unsigned long lmi = __pa(addr) >> PAGE_SHIFT; 1989 1990 if (protect) 1991 kernel_unmap_linear_page(addr, lmi); 1992 else 1993 kernel_map_linear_page(addr, lmi); 1994 1995 return true; 1996 } 1997 #endif 1998 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org