Hi Zong, Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on linus/master] [also build test WARNING on v5.9-rc2 next-20200827] [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/Zong-Li/Get-cache-information-from-userland/20200827-162439 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 15bc20c6af4ceee97a1f90b43c0e386643c071b4 config: riscv-randconfig-s032-20200827 (attached as .config) compiler: riscv64-linux-gcc (GCC) 9.3.0 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: v0.6.2-191-g10164920-dirty # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> sparse warnings: (new ones prefixed by >>) >> arch/riscv/kernel/cacheinfo.c:39:16: sparse: sparse: Using plain integer as >> NULL pointer # https://github.com/0day-ci/linux/commit/a51c248ba0626069792c3f84c8879f685f4a1ff6 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Zong-Li/Get-cache-information-from-userland/20200827-162439 git checkout a51c248ba0626069792c3f84c8879f685f4a1ff6 vim +39 arch/riscv/kernel/cacheinfo.c 26 27 static struct cacheinfo *get_cacheinfo(u32 level, enum cache_type type) 28 { 29 struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(smp_processor_id()); 30 struct cacheinfo *this_leaf; 31 int index; 32 33 for (index = 0; index < this_cpu_ci->num_leaves; index++) { 34 this_leaf = this_cpu_ci->info_list + index; 35 if (this_leaf->level == level && this_leaf->type == type) 36 return this_leaf; 37 } 38 > 39 return 0; 40 } 41 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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