Hi Marcelo, Thank you for the patch! Yet something to improve: [auto build test ERROR on tip/sched/core] [also build test ERROR on v5.13] [cannot apply to hnaz-linux-mm/master tip/master linus/master tip/core/entry next-20210709] [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/Marcelo-Tosatti/optionally-perfo... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 031e3bd8986fffe31e1ddbf5264cccfe30c9abd7 config: arm64-randconfig-r012-20210709 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8d69635ed9ecf36fd0ca85906bfde17949671cbe) 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/91934f6f1fd6271ef8af8ec3848685580... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Marcelo-Tosatti/optionally-perform-deferred-actions-on-return-to-userspace/20210710-021217 git checkout 91934f6f1fd6271ef8af8ec384868558014e371b # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): if (!p->expire) ~ ^ 1 error generated. vim +1909 mm/vmstat.c 1896 1897 #ifdef CONFIG_PROC_FS 1898 static bool need_drain_remote_zones(int cpu) 1899 { 1900 struct zone *zone; 1901 1902 for_each_populated_zone(zone) { 1903 struct per_cpu_pageset *p; 1904 1905 p = per_cpu_ptr(zone->pageset, cpu); 1906 1907 if (!p->pcp.count) 1908 continue; 1910 continue; 1911 if (zone_to_nid(zone) == cpu_to_node(cpu)) 1912 continue; 1913 1914 return true; 1915 } 1916 1917 return false; 1918 } 1919 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org