linux-kernel - [csky-linux:riscv_compat_v6_svpbmt-v6 10/35] arch/riscv/kernel/cpufeature.c:185:6: warning: variable 'cpu_apply

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Message-ID: <202202110204.3m29JCRv-lkp@intel.com>
Date:   Fri, 11 Feb 2022 02:13:49 +0800
From:   kernel test robot <lkp@...el.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Guo Ren <guoren@...ux.alibaba.com>
Subject: [csky-linux:riscv_compat_v6_svpbmt-v6 10/35]
 arch/riscv/kernel/cpufeature.c:185:6: warning: variable 'cpu_apply_feature'
 set but not used

tree:   https://github.com/c-sky/csky-linux riscv_compat_v6_svpbmt-v6
head:   54acb36c958fc990cc59889f79c8ddca7386c295
commit: 9a8cf89570e893738c501551591b03bd868c825c [10/35] riscv: add cpufeature handling via alternatives
config: riscv-randconfig-r042-20220208 (https://download.01.org/0day-ci/archive/20220211/202202110204.3m29JCRv-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project aa845d7a245d85c441d0bd44fc7b6c3be8f3de8d)
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 riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/c-sky/csky-linux/commit/9a8cf89570e893738c501551591b03bd868c825c
        git remote add csky-linux https://github.com/c-sky/csky-linux
        git fetch --no-tags csky-linux riscv_compat_v6_svpbmt-v6
        git checkout 9a8cf89570e893738c501551591b03bd868c825c
        # 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=riscv SHELL=/bin/bash arch/riscv/kernel/ arch/riscv/mm/ drivers/base/firmware_loader/ drivers/pci/ drivers/target/ fs/erofs/ fs/pstore/ kernel/ mm/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/riscv/kernel/cpufeature.c:185:6: warning: variable 'cpu_apply_feature' set but not used [-Wunused-but-set-variable]
           u32 cpu_apply_feature = 0;
               ^
   1 warning generated.


vim +/cpu_apply_feature +185 arch/riscv/kernel/cpufeature.c

   180	
   181	void riscv_cpufeature_patch_func(struct alt_entry *begin, struct alt_entry *end,
   182					 unsigned int stage)
   183	{
   184		u32 cpu_req_feature = cpufeature_probe(stage);
 > 185		u32 cpu_apply_feature = 0;

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org