Hi "Aneesh,

I love your patch! Perhaps something to improve:

[auto build test WARNING on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Aneesh-Kumar-K-V/mm-demotion-Memory-tiers-and-demotion/20220729-141604
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
config: x86_64-allmodconfig
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel-lab-lkp/linux/commit/ffb16b158fbcab09eec35d082fd8696bb3e649da
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Aneesh-Kumar-K-V/mm-demotion-Memory-tiers-and-demotion/20220729-141604
        git checkout ffb16b158fbcab09eec35d082fd8696bb3e649da
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

sparse warnings: (new ones prefixed by >>)
>> mm/memory-tiers.c:33:24: sparse: sparse: symbol 'node_memory_types' was not declared. Should it be static?

-- 
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