Re: [PATCH] mm: Only re-generate demotion targets when a numa node changes its N_CPU state

[kernel test robot <lkp@intel.com>]

Hi Oscar,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on hnaz-mm/master]

url:    https://github.com/0day-ci/linux/commits/Oscar-Salvador/mm-Only-re-generate-demotion-targets-when-a-numa-node-changes-its-N_CPU-state/20220309-224707
base:   https://github.com/hnaz/linux-mm master
config: riscv-randconfig-s032-20220309 (https://download.01.org/0day-ci/archive/20220310/202203100900.4UKi7486-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 11.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://github.com/0day-ci/linux/commit/8af0c9ff9475c64e31963a5810b127875081c5ff
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Oscar-Salvador/mm-Only-re-generate-demotion-targets-when-a-numa-node-changes-its-N_CPU-state/20220309-224707
        git checkout 8af0c9ff9475c64e31963a5810b127875081c5ff
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=riscv SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   mm/vmstat.c: In function 'vmstat_cpu_online':
>> mm/vmstat.c:2056:17: error: implicit declaration of function 'set_migration_target_nodes' [-Werror=implicit-function-declaration]
    2056 |                 set_migration_target_nodes();
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/set_migration_target_nodes +2056 mm/vmstat.c

  2049	
  2050	static int vmstat_cpu_online(unsigned int cpu)
  2051	{
  2052		refresh_zone_stat_thresholds();
  2053	
  2054		if (!node_state(cpu_to_node(cpu), N_CPU)) {
  2055			node_set_state(cpu_to_node(cpu), N_CPU);
> 2056			set_migration_target_nodes();
  2057		}
  2058	
  2059		return 0;
  2060	}
  2061	

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