linux-kernel - kernel/trace/rv/monitors/wip/wip.c:20:1: warning: unused function 'da_handle_start_run_event

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Date:   Wed, 18 Jan 2023 21:55:17 +0800
From:   kernel test robot <lkp@...el.com>
To:     Daniel Bristot de Oliveira <bristot@...nel.org>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        "Steven Rostedt (Google)" <rostedt@...dmis.org>
Subject: kernel/trace/rv/monitors/wip/wip.c:20:1: warning: unused function
 'da_handle_start_run_event_wip'

Hi Daniel,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c1649ec55708ae42091a2f1bca1ab49ecd722d55
commit: 10bde81c74863472047f31304064018c40f488ee rv/monitor: Add the wip monitor
date:   6 months ago
config: mips-randconfig-r022-20230118 (https://download.01.org/0day-ci/archive/20230118/202301182158.8nHlCmQ9-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 4196ca3278f78c6e19246e54ab0ecb364e37d66a)
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 mips cross compiling tool for clang build
        # apt-get install binutils-mipsel-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=10bde81c74863472047f31304064018c40f488ee
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 10bde81c74863472047f31304064018c40f488ee
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash kernel/trace/rv/ lib/

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

All warnings (new ones prefixed by >>):

>> kernel/trace/rv/monitors/wip/wip.c:20:1: warning: unused function 'da_handle_start_run_event_wip' [-Wunused-function]
   DECLARE_DA_MON_PER_CPU(wip, unsigned char);
   ^
   include/rv/da_monitor.h:532:48: note: expanded from macro 'DECLARE_DA_MON_PER_CPU'
   DECLARE_DA_MON_INIT_PER_CPU(name, type)                                                         \
                                                                                                   ^
   include/rv/da_monitor.h:434:20: note: expanded from macro '\
   DECLARE_DA_MON_MONITOR_HANDLER_IMPLICIT'
   static inline bool da_handle_start_run_event_##name(enum events_##name event)                   \
                      ^
   <scratch space>:174:1: note: expanded from here
   da_handle_start_run_event_wip
   ^
   1 warning generated.


vim +/da_handle_start_run_event_wip +20 kernel/trace/rv/monitors/wip/wip.c

8812d21219b9c6 Daniel Bristot de Oliveira 2022-07-29  18  
8812d21219b9c6 Daniel Bristot de Oliveira 2022-07-29  19  struct rv_monitor rv_wip;
8812d21219b9c6 Daniel Bristot de Oliveira 2022-07-29 @20  DECLARE_DA_MON_PER_CPU(wip, unsigned char);
8812d21219b9c6 Daniel Bristot de Oliveira 2022-07-29  21  

:::::: The code at line 20 was first introduced by commit
:::::: 8812d21219b9c649dd25eb93915e00939944aeb7 rv/monitor: Add the wip monitor skeleton created by dot2k

:::::: TO: Daniel Bristot de Oliveira <bristot@...nel.org>
:::::: CC: Steven Rostedt (Google) <rostedt@...dmis.org>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests