Hi Fuad, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on c500bee1c5b2f1d59b1081ac879d73268ab0ff17] url: https://github.com/0day-ci/linux/commits/Fuad-Tabba/KVM-arm64-Fixed-featu... base: c500bee1c5b2f1d59b1081ac879d73268ab0ff17 config: arm64-randconfig-r016-20210816 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 2c6448cdc2f68f8c28fd0bd9404182b81306e6e6) 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/d20adc963041fb77c56e8da7935236d73... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Fuad-Tabba/KVM-arm64-Fixed-features-for-protected-VMs/20210817-161500 git checkout d20adc963041fb77c56e8da7935236d73b738e63 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): [ESR_ELx_EC_WFx] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:162:28: note: previous initialization is here [0 ... ESR_ELx_EC_MAX] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:164:26: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [ESR_ELx_EC_CP15_32] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:162:28: note: previous initialization is here [0 ... ESR_ELx_EC_MAX] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:165:26: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [ESR_ELx_EC_CP15_64] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:162:28: note: previous initialization is here [0 ... ESR_ELx_EC_MAX] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:166:26: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [ESR_ELx_EC_CP14_MR] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:162:28: note: previous initialization is here [0 ... ESR_ELx_EC_MAX] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:167:26: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [ESR_ELx_EC_CP14_LS] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:162:28: note: previous initialization is here [0 ... ESR_ELx_EC_MAX] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:168:26: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [ESR_ELx_EC_CP14_64] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:162:28: note: previous initialization is here [0 ... ESR_ELx_EC_MAX] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:169:24: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [ESR_ELx_EC_HVC32] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:162:28: note: previous initialization is here [0 ... ESR_ELx_EC_MAX] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:170:24: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [ESR_ELx_EC_SMC32] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:162:28: note: previous initialization is here [0 ... ESR_ELx_EC_MAX] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^~~~~~~~~~~ arch/arm64/kvm/hyp/nvhe/switch.c:171:24: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] [ESR_ELx_EC_HVC64] = NULL, ^~~~ include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) vim +163 arch/arm64/kvm/hyp/nvhe/switch.c 160 161 static exit_handle_fn hyp_exit_handlers[] = { 162 [0 ... ESR_ELx_EC_MAX] = NULL, 164 [ESR_ELx_EC_CP15_32] = NULL, 165 [ESR_ELx_EC_CP15_64] = NULL, 166 [ESR_ELx_EC_CP14_MR] = NULL, 167 [ESR_ELx_EC_CP14_LS] = NULL, 168 [ESR_ELx_EC_CP14_64] = NULL, 169 [ESR_ELx_EC_HVC32] = NULL, 170 [ESR_ELx_EC_SMC32] = NULL, 171 [ESR_ELx_EC_HVC64] = NULL, 172 [ESR_ELx_EC_SMC64] = NULL, 173 [ESR_ELx_EC_SYS64] = NULL, 174 [ESR_ELx_EC_SVE] = NULL, 175 [ESR_ELx_EC_IABT_LOW] = NULL, 176 [ESR_ELx_EC_DABT_LOW] = NULL, 177 [ESR_ELx_EC_SOFTSTP_LOW] = NULL, 178 [ESR_ELx_EC_WATCHPT_LOW] = NULL, 179 [ESR_ELx_EC_BREAKPT_LOW] = NULL, 180 [ESR_ELx_EC_BKPT32] = NULL, 181 [ESR_ELx_EC_BRK64] = NULL, 182 [ESR_ELx_EC_FP_ASIMD] = NULL, 183 [ESR_ELx_EC_PAC] = NULL, 184 }; 185 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org