[kbuild-all] include/linux/memcontrol.h:1804:5: warning: no previous prototype for function 'memcg_charge_bulk_pages'

tree: https://github.com/0day-ci/linux/commits/UPDATE-20211014-160451/Vasily-Av... head: 834132e4456c615433314628b950f9dd10406698 commit: 834132e4456c615433314628b950f9dd10406698 memcg: enable memory accounting in __alloc_pages_bulk date: 7 hours ago config: hexagon-randconfig-r041-20211014 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 6c76d0101193aa4eb891a6954ff047eda2f9cf71) 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/0day-ci/linux/commit/834132e4456c615433314628b950f9dd1... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review UPDATE-20211014-160451/Vasily-Averin/memcg-enable-memory-accounting-in-__alloc_pages_bulk/20211008-172703 git checkout 834132e4456c615433314628b950f9dd10406698 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon 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 >>): In file included from net/ipv6/af_inet6.c:40: In file included from include/linux/icmpv6.h:6: In file included from include/linux/ipv6.h:91: In file included from include/linux/tcp.h:19: In file included from include/net/sock.h:53: int memcg_charge_bulk_pages(gfp_t gfp, int nr_pages, ^ include/linux/memcontrol.h:1804:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int memcg_charge_bulk_pages(gfp_t gfp, int nr_pages, ^ static 1 warning generated. -- In file included from net/ipv6/ip6_fib.c:28: In file included from include/net/ip.h:28: In file included from include/net/inet_sock.h:22: In file included from include/net/sock.h:53: int memcg_charge_bulk_pages(gfp_t gfp, int nr_pages, ^ include/linux/memcontrol.h:1804:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int memcg_charge_bulk_pages(gfp_t gfp, int nr_pages, ^ static net/ipv6/ip6_fib.c:1377:25: warning: variable 'pn' set but not used [-Wunused-but-set-variable] struct fib6_node *fn, *pn = NULL; ^ 2 warnings generated. vim +/memcg_charge_bulk_pages +1804 include/linux/memcontrol.h 1803 1805 struct list_head *page_list, 1806 struct page **page_array) 1807 { 1808 return 0; 1809 } 1810 #endif /* CONFIG_MEMCG_KMEM */ 1811 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org