linux-kernel - drivers/gpu/drm/i915/gvt/gtt.c:1022:28: error: unused variable 'vgpu'

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Message-ID: <202210070319.2R72PPM5-lkp@intel.com>
Date:   Fri, 7 Oct 2022 03:24:40 +0800
From:   kernel test robot <lkp@...el.com>
To:     Zheng Wang <zyytlz.wz@....com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        0day robot <lkp@...el.com>
Subject: drivers/gpu/drm/i915/gvt/gtt.c:1022:28: error: unused variable 'vgpu'

tree:   https://github.com/intel-lab-lkp/linux/commits/UPDATE-20221007-010044/Zheng-Wang/drm-i915-gvt-fix-double-free-bug-in-split_2MB_gtt_entry/20220928-113551
head:   03cc4c7d417a0ec6ca4b2d1c30a9e3fd7fb96185
commit: 03cc4c7d417a0ec6ca4b2d1c30a9e3fd7fb96185 drm/i915/gvt: fix double free bug in split_2MB_gtt_entry
date:   2 hours ago
config: x86_64-rhel-8.3-syz
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/03cc4c7d417a0ec6ca4b2d1c30a9e3fd7fb96185
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review UPDATE-20221007-010044/Zheng-Wang/drm-i915-gvt-fix-double-free-bug-in-split_2MB_gtt_entry/20220928-113551
        git checkout 03cc4c7d417a0ec6ca4b2d1c30a9e3fd7fb96185
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/

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

All errors (new ones prefixed by >>):

   drivers/gpu/drm/i915/gvt/gtt.c: In function 'ppgtt_invalidate_and_free_spt':
>> drivers/gpu/drm/i915/gvt/gtt.c:1022:28: error: unused variable 'vgpu' [-Werror=unused-variable]
    1022 |         struct intel_vgpu *vgpu = spt->vgpu;
         |                            ^~~~
   cc1: all warnings being treated as errors


vim +/vgpu +1022 drivers/gpu/drm/i915/gvt/gtt.c

cf4ee73fd9b6d3 Changbin Du 2018-03-01  1019  
03cc4c7d417a0e Zheng Wang  2022-10-07  1020  static int  ppgtt_invalidate_and_free_spt(struct intel_vgpu_ppgtt_spt *spt)
2707e44466881d Zhi Wang    2016-03-28  1021  {
695fbc08d80f93 Tina Zhang  2017-03-10 @1022  	struct intel_vgpu *vgpu = spt->vgpu;
2707e44466881d Zhi Wang    2016-03-28  1023  	int ret;
2707e44466881d Zhi Wang    2016-03-28  1024  
2707e44466881d Zhi Wang    2016-03-28  1025  	trace_spt_change(spt->vgpu->id, "die", spt,
44b467338094d8 Changbin Du 2018-01-30  1026  		spt->guest_page.gfn, spt->shadow_page.type);
80e76ea631de6e Changbin Du 2018-05-15  1027  	if (ppgtt_put_spt(spt) > 0)
2707e44466881d Zhi Wang    2016-03-28  1028  		return 0;
03cc4c7d417a0e Zheng Wang  2022-10-07  1029  	ret = ppgtt_invalidate_spt(spt);
03cc4c7d417a0e Zheng Wang  2022-10-07  1030  	if (!ret) {
03cc4c7d417a0e Zheng Wang  2022-10-07  1031  		trace_spt_change(spt->vgpu->id, "release", spt,
03cc4c7d417a0e Zheng Wang  2022-10-07  1032  			 spt->guest_page.gfn, spt->shadow_page.type);
03cc4c7d417a0e Zheng Wang  2022-10-07  1033  		ppgtt_free_spt(spt);
03cc4c7d417a0e Zheng Wang  2022-10-07  1034  	}
03cc4c7d417a0e Zheng Wang  2022-10-07  1035  
03cc4c7d417a0e Zheng Wang  2022-10-07  1036  	return ret;
03cc4c7d417a0e Zheng Wang  2022-10-07  1037  }
03cc4c7d417a0e Zheng Wang  2022-10-07  1038  

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

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