[kbuild-all] [linux-stable-rc:linux-4.9.y 9242/9999] kernel/bpf/core.c:222:12: warning: no previous declaration for 'bpf_jit_alloc_exec_limit'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.9.y head: d7f83e4f45e886d919bc985bd225b8355ddd9284 commit: 6c1dc8f96b54ad9e63ef3becac73750a588abe6e [9242/9999] bpf: fix bpf_jit_limit knob for PAGE_SIZE >= 64K config: powerpc-randconfig-r021-20210607 (attached as .config) compiler: powerpc-linux-gcc (GCC) 7.5.0 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/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-4.9.y git checkout 6c1dc8f96b54ad9e63ef3becac73750a588abe6e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 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 >>): u64 __weak bpf_jit_alloc_exec_limit(void) ^~~~~~~~~~~~~~~~~~~~~~~~ vim +/bpf_jit_alloc_exec_limit +222 kernel/bpf/core.c 217 218 /* Can be overridden by an arch's JIT compiler if it has a custom, 219 * dedicated BPF backend memory area, or if neither of the two 220 * below apply. 221 */ 223 { 224 #if defined(MODULES_VADDR) 225 return MODULES_END - MODULES_VADDR; 226 #else 227 return VMALLOC_END - VMALLOC_START; 228 #endif 229 } 230 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org