Re: [PATCH v7 43/47] drm/tegra: dc: Support memory bandwidth management

[kernel test robot <lkp@intel.com>]

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Hi Dmitry,

I love your patch! Perhaps something to improve:

[auto build test WARNING on next-20201104]
[also build test WARNING on v5.10-rc3]
[cannot apply to tegra/for-next robh/for-next tegra-drm/drm/tegra/for-next linus/master v5.10-rc2 v5.10-rc1 v5.9]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Dmitry-Osipenko/Introduce-memory-interconnect-for-NVIDIA-Tegra-SoCs/20201105-005537
base:    cf7cd542d1b538f6e9e83490bc090dd773f4266d
config: arm-defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
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
        # https://github.com/0day-ci/linux/commit/01d7363f5d564fbbdfd51321b86c6ca34a41bab1
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Dmitry-Osipenko/Introduce-memory-interconnect-for-NVIDIA-Tegra-SoCs/20201105-005537
        git checkout 01d7363f5d564fbbdfd51321b86c6ca34a41bab1
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/tegra/drm.c: In function 'tegra_atomic_post_commit':
>> drivers/gpu/drm/tegra/drm.c:66:25: warning: variable 'old_crtc_state' set but not used [-Wunused-but-set-variable]
      66 |  struct drm_crtc_state *old_crtc_state;
         |                         ^~~~~~~~~~~~~~

vim +/old_crtc_state +66 drivers/gpu/drm/tegra/drm.c

    62	
    63	static void tegra_atomic_post_commit(struct drm_device *drm,
    64					     struct drm_atomic_state *old_state)
    65	{
  > 66		struct drm_crtc_state *old_crtc_state;
    67		struct drm_crtc *crtc;
    68		unsigned int i;
    69	
    70		for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i)
    71			tegra_crtc_atomic_post_commit(crtc, old_state);
    72	}
    73	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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