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Sun, 20 Mar 2022 17:03:30 +0000 Date: Mon, 21 Mar 2022 01:03:24 +0800 From: kernel test robot To: Ard Biesheuvel Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: [ardb:efi-psci 2/2] drivers/firmware/psci/psci.c:152:2: warning: unannotated fall-through between switch labels Message-ID: <202203210042.UJZ5llHd-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git efi-psci head: 4b8d4b95fbd43459a4b0ae3f9020a912f7621884 commit: 4b8d4b95fbd43459a4b0ae3f9020a912f7621884 [2/2] efi: arm: implement PSCI method backed by EFI runtime code config: arm64-randconfig-r022-20220320 (https://download.01.org/0day-ci/archive/20220321/202203210042.UJZ5llHd-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 85e9b2687a13d1908aa86d1b89c5ce398a06cd39) 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://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/commit/?id=4b8d4b95fbd43459a4b0ae3f9020a912f7621884 git remote add ardb git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git git fetch --no-tags ardb efi-psci git checkout 4b8d4b95fbd43459a4b0ae3f9020a912f7621884 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/firmware/psci/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/firmware/psci/psci.c:152:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] default: ^ drivers/firmware/psci/psci.c:152:2: note: insert '__attribute__((fallthrough));' to silence this warning default: ^ __attribute__((fallthrough)); drivers/firmware/psci/psci.c:152:2: note: insert 'break;' to avoid fall-through default: ^ break; drivers/firmware/psci/psci.c:94:20: warning: unused function 'psci_power_state_loses_context' [-Wunused-function] static inline bool psci_power_state_loses_context(u32 state) ^ 2 warnings generated. vim +152 drivers/firmware/psci/psci.c 131 132 static unsigned long __invoke_psci_fn_efi(unsigned long function_id, 133 unsigned long arg0, unsigned long arg1, 134 unsigned long arg2) 135 { 136 unsigned long flags, ret; 137 138 switch (function_id) { 139 case PSCI_0_2_FN_PSCI_VERSION: 140 return PSCI_VERSION(0, 2); 141 case PSCI_0_2_FN_MIGRATE_INFO_TYPE: 142 return PSCI_0_2_TOS_MP; 143 case PSCI_0_2_FN_CPU_SUSPEND: 144 case PSCI_0_2_FN_CPU_OFF: 145 case PSCI_0_2_FN_CPU_ON: 146 case PSCI_0_2_FN_AFFINITY_INFO: 147 case PSCI_0_2_FN64_CPU_SUSPEND: 148 case PSCI_0_2_FN64_CPU_ON: 149 case PSCI_0_2_FN64_AFFINITY_INFO: 150 if (WARN_ON_ONCE(!efi_psci.psci_handler || 151 !efi_enabled(EFI_RUNTIME_SERVICES))) > 152 default: 153 return PSCI_RET_NOT_SUPPORTED; 154 break; 155 } 156 157 raw_local_irq_save(flags); 158 efi_set_pgd(&efi_mm); 159 160 ret = efi_psci.psci_handler(function_id, arg0, arg1, arg2); 161 162 efi_set_pgd(current->active_mm); 163 raw_local_irq_restore(flags); 164 165 return ret; 166 } 167 -- 0-DAY CI Kernel Test Service https://01.org/lkp