linux-kernel - drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_enc_cfg.c:416:6: warning: variable 'matching_stream

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Date:   Fri, 25 Mar 2022 05:49:59 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jimmy Kizito <Jimmy.Kizito@....com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Alex Deucher <alexander.deucher@....com>,
        Jun Lei <Jun.Lei@....com>
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_enc_cfg.c:416:6:
 warning: variable 'matching_stream_ptrs' set but not used

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   ed4643521e6af8ab8ed1e467630a85884d2696cf
commit: b3492ed160768ad60ad6753269099213b6772a70 drm/amd/display: Fix concurrent dynamic encoder assignment
date:   6 months ago
config: arm64-randconfig-r013-20220324 (https://download.01.org/0day-ci/archive/20220325/202203250504.X4x0hoOe-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0f6d9501cf49ce02937099350d08f20c4af86f3d)
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/torvalds/linux.git/commit/?id=b3492ed160768ad60ad6753269099213b6772a70
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout b3492ed160768ad60ad6753269099213b6772a70
        # 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

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 >>):

>> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_enc_cfg.c:416:6: warning: variable 'matching_stream_ptrs' set but not used [-Wunused-but-set-variable]
           int matching_stream_ptrs = 0;
               ^
   1 warning generated.


vim +/matching_stream_ptrs +416 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_enc_cfg.c

   404	
   405	bool link_enc_cfg_validate(struct dc *dc, struct dc_state *state)
   406	{
   407		bool is_valid = false;
   408		bool valid_entries = true;
   409		bool valid_stream_ptrs = true;
   410		bool valid_uniqueness = true;
   411		bool valid_avail = true;
   412		bool valid_streams = true;
   413		int i, j;
   414		uint8_t valid_count = 0;
   415		uint8_t dig_stream_count = 0;
 > 416		int matching_stream_ptrs = 0;

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