linux-kernel - [ammarfaizi2-block:palmer/linux/riscv-d1 9/12] arch/riscv/kernel/cpufeature.c:292:6: warning: variable 'cpu_apply

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Date:   Thu, 12 May 2022 23:38:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org, Palmer Dabbelt <palmer@...osinc.com>,
        Wei Fu <wefu@...hat.com>,
        Liu Shaohua <liush@...winnertech.com>,
        Guo Ren <guoren@...nel.org>,
        Philipp Tomsich <philipp.tomsich@...ll.eu>
Subject: [ammarfaizi2-block:palmer/linux/riscv-d1 9/12]
 arch/riscv/kernel/cpufeature.c:292:6: warning: variable 'cpu_apply_feature'
 set but not used

tree:   https://github.com/ammarfaizi2/linux-block palmer/linux/riscv-d1
head:   a35707c3d850dda0ceefb75b1b3bd191921d5765
commit: ff689fd21cb13098305bae3f8d0c0065df2e2fc1 [9/12] riscv: add RISC-V Svpbmt extension support
config: riscv-randconfig-r033-20220512 (https://download.01.org/0day-ci/archive/20220512/202205122310.HMWyrLx7-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 9519dacab7b8afd537811fc2abaceb4d14f4e16a)
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/ammarfaizi2/linux-block/commit/ff689fd21cb13098305bae3f8d0c0065df2e2fc1
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block palmer/linux/riscv-d1
        git checkout ff689fd21cb13098305bae3f8d0c0065df2e2fc1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/kernel/

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:292:6: warning: variable 'cpu_apply_feature' set but not used [-Wunused-but-set-variable]
           u32 cpu_apply_feature = 0;
               ^
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   error: A dwo section may not contain relocations
   fatal error: too many errors emitted, stopping now [-ferror-limit=]
   1 warning and 20 errors generated.


vim +/cpu_apply_feature +292 arch/riscv/kernel/cpufeature.c

   286	
   287	void __init_or_module riscv_cpufeature_patch_func(struct alt_entry *begin,
   288							  struct alt_entry *end,
   289							  unsigned int stage)
   290	{
   291		u32 cpu_req_feature = cpufeature_probe(stage);
 > 292		u32 cpu_apply_feature = 0;

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp