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-perform-deferred-actions-on-return-to-userspace/20210710-021217
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/91934f6f1fd6271ef8af8ec384868558014e371b
        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@intel.com>

All errors (new ones prefixed by >>):

>> mm/vmstat.c:1909:11: error: no member named 'expire' in 'struct per_cpu_pageset'
                   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;
> 1909			if (!p->expire)
  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