linux-kernel - drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_hwseq.c:88:14: warning: variable 'is_in

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Date:   Tue, 6 Sep 2022 07:06:08 +0800
From:   kernel test robot <lkp@...el.com>
To:     Zhan Liu <zhan.liu@....com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Alex Deucher <alexander.deucher@....com>,
        Charlene Liu <charlene.liu@....com>
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_hwseq.c:88:14:
 warning: variable 'is_in_uma' set but not used

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   53e99dcff61e1523ec1c3628b2d564ba15d32eb7
commit: 3f68c01be9a2227de1e190317fe34a6fb835a094 drm/amd/display: add cyan_skillfish display support
date:   11 months ago
config: i386-buildonly-randconfig-r004-20220905 (https://download.01.org/0day-ci/archive/20220906/202209060730.VeXAC3Z7-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3f68c01be9a2227de1e190317fe34a6fb835a094
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 3f68c01be9a2227de1e190317fe34a6fb835a094
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/

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 >>):

   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_hwseq.c: In function 'gpu_addr_to_uma':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_hwseq.c:88:14: warning: variable 'is_in_uma' set but not used [-Wunused-but-set-variable]
      88 |         bool is_in_uma;
         |              ^~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_hwseq.c: In function 'dcn201_pipe_control_lock':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_hwseq.c:544:22: warning: variable 'hubp' set but not used [-Wunused-but-set-variable]
     544 |         struct hubp *hubp = NULL;
         |                      ^~~~
--
   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_dpp.c: In function 'dpp201_get_optimal_number_of_taps':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_dpp.c:185:18: warning: variable 'pixel_width' set but not used [-Wunused-but-set-variable]
     185 |         uint32_t pixel_width;
         |                  ^~~~~~~~~~~


vim +/is_in_uma +88 drivers/gpu/drm/amd/amdgpu/../display/dc/dcn201/dcn201_hwseq.c

    84	
    85	static void gpu_addr_to_uma(struct dce_hwseq *hwseq,
    86			PHYSICAL_ADDRESS_LOC *addr)
    87	{
  > 88		bool is_in_uma;
    89	
    90		if (hwseq->fb_base.quad_part <= addr->quad_part &&
    91				addr->quad_part < hwseq->fb_top.quad_part) {
    92			addr->quad_part -= hwseq->fb_base.quad_part;
    93			addr->quad_part += hwseq->fb_offset.quad_part;
    94			is_in_uma = true;
    95		} else if (hwseq->fb_offset.quad_part <= addr->quad_part &&
    96				addr->quad_part <= hwseq->uma_top.quad_part) {
    97			is_in_uma = true;
    98		} else if (addr->quad_part == 0) {
    99			is_in_uma = false;
   100		} else {
   101			is_in_uma = false;
   102		}
   103	}
   104	

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