[kbuild-all] arch/arm64/kvm/hyp/nvhe/mem_protect.c:26:17: sparse: sparse: symbol 'host_s2_mem' was not declared. Should it be static?

Hi Stephen, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 315d99318179b9cd5077ccc9f7f26a164c9fa998 commit: 3b7e56be786462423802ff84525b9a12539c5887 Merge branch 'kvm-arm64/nvhe-sve' into kvmarm-master/next date: 4 weeks ago config: arm64-randconfig-s032-20210513 (attached as .config) compiler: aarch64-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: v0.6.3-341-g8af24329-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 3b7e56be786462423802ff84525b9a12539c5887 # 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__' W=1 ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +/host_s2_mem +26 arch/arm64/kvm/hyp/nvhe/mem_protect.c 1025c8c0c6accf Quentin Perret 2021-03-19 25 1025c8c0c6accf Quentin Perret 2021-03-19 @26 struct hyp_pool host_s2_mem; 1025c8c0c6accf Quentin Perret 2021-03-19 @27 struct hyp_pool host_s2_dev; 1025c8c0c6accf Quentin Perret 2021-03-19 28 :::::: The code at line 26 was first introduced by commit :::::: 1025c8c0c6accfcbdc8f52ca1940160f65cd87d6 KVM: arm64: Wrap the host with a stage 2 :::::: TO: Quentin Perret <qperret(a)google.com&gt; :::::: CC: Marc Zyngier <maz(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org