Hi,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on linus/master]
[also build test ERROR on v5.13-rc3]
[cannot apply to hnaz-linux-mm/master next-20210526]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/yulei-kernel-gmail-com/Introduce-memory-allocation-speed-throttle-in-memcg/20210527-002103
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git ad9f25d338605d26acedcaf3ba5fab5ca26f1c10
config: arm64-randconfig-r014-20210526 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 99155e913e9bad5f7f8a247f8bb3a3ff3da74af1)
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
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/0day-ci/linux/commit/9ae850a0a4c9f5b03c8673b0bbe10344c637b4ec
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review yulei-kernel-gmail-com/Introduce-memory-allocation-speed-throttle-in-memcg/20210527-002103
        git checkout 9ae850a0a4c9f5b03c8673b0bbe10344c637b4ec
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 

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/memcontrol.c:1611:13: error: redefinition of 'mem_cgroup_mst_spd_throttle'
   static void mem_cgroup_mst_spd_throttle(struct mem_cgroup *memcg)
               ^
   mm/memcontrol.c:1607:13: note: previous definition is here
   static void mem_cgroup_mst_spd_throttle(struct mem_cgroup *memcg)
               ^
>> mm/memcontrol.c:4157:2: error: implicit declaration of function 'mem_cgroup_mst_show_nr_throttled' [-Werror,-Wimplicit-function-declaration]
           mem_cgroup_mst_show_nr_throttled(memcg, m);
           ^
   mm/memcontrol.c:4157:2: note: did you mean 'mem_cgroup_mst_spd_throttle'?
   mm/memcontrol.c:1611:13: note: 'mem_cgroup_mst_spd_throttle' declared here
   static void mem_cgroup_mst_spd_throttle(struct mem_cgroup *memcg)
               ^
   2 errors generated.


vim +/mem_cgroup_mst_show_nr_throttled +4157 mm/memcontrol.c

  4155	
  4156		mem_cgroup_mst_show_mem_spd_max(memcg, m);
> 4157		mem_cgroup_mst_show_nr_throttled(memcg, m);
  4158	
  4159		return 0;
  4160	}
  4161	

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