Hi Mauro, I love your patch! Yet something to improve: [auto build test ERROR on linuxtv-media/master] [cannot apply to v5.9-rc3 next-20200902] [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/Mauro-Carvalho-Chehab/media-sparse-smatch-warn-fixes/20200903-002025 base: git://linuxtv.org/media_tree.git master config: arm-randconfig-r015-20200902 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 224d8153b53b16cf535ea1a55afdfe1ec5b1374f) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): drivers/media/test-drivers/vivid/vivid-core.c:1318:11: warning: unused variable 'i' [-Wunused-variable] int ret, i; ^ >> drivers/media/test-drivers/vivid/vivid-core.c:1887:47: error: use of undeclared identifier 'cec_tx_bus_cnt' ret = vivid_create_devnodes(pdev, dev, inst, cec_tx_bus_cnt, ^ 1 warning and 1 error generated. # https://github.com/0day-ci/linux/commit/cd6461a9795132db179f4416123658efbf8a92b7 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Mauro-Carvalho-Chehab/media-sparse-smatch-warn-fixes/20200903-002025 git checkout cd6461a9795132db179f4416123658efbf8a92b7 vim +/cec_tx_bus_cnt +1887 drivers/media/test-drivers/vivid/vivid-core.c 1874 1875 v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vid_cap); 1876 v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vid_out); 1877 v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vbi_cap); 1878 v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vbi_out); 1879 v4l2_ctrl_handler_setup(&dev->ctrl_hdl_radio_rx); 1880 v4l2_ctrl_handler_setup(&dev->ctrl_hdl_radio_tx); 1881 v4l2_ctrl_handler_setup(&dev->ctrl_hdl_sdr_cap); 1882 v4l2_ctrl_handler_setup(&dev->ctrl_hdl_meta_cap); 1883 v4l2_ctrl_handler_setup(&dev->ctrl_hdl_meta_out); 1884 v4l2_ctrl_handler_setup(&dev->ctrl_hdl_touch_cap); 1885 1886 /* finally start creating the device nodes */ > 1887 ret = vivid_create_devnodes(pdev, dev, inst, cec_tx_bus_cnt, 1888 tvnorms_cap, tvnorms_out, 1889 in_type_counter, out_type_counter); 1890 if (ret) 1891 goto unreg_dev; 1892 1893 /* Now that everything is fine, let's add it to device list */ 1894 vivid_devs[inst] = dev; 1895 1896 return 0; 1897 1898 unreg_dev: 1899 vb2_video_unregister_device(&dev->touch_cap_dev); 1900 vb2_video_unregister_device(&dev->meta_out_dev); 1901 vb2_video_unregister_device(&dev->meta_cap_dev); 1902 video_unregister_device(&dev->radio_tx_dev); 1903 video_unregister_device(&dev->radio_rx_dev); 1904 vb2_video_unregister_device(&dev->sdr_cap_dev); 1905 vb2_video_unregister_device(&dev->vbi_out_dev); 1906 vb2_video_unregister_device(&dev->vbi_cap_dev); 1907 vb2_video_unregister_device(&dev->vid_out_dev); 1908 vb2_video_unregister_device(&dev->vid_cap_dev); 1909 cec_unregister_adapter(dev->cec_rx_adap); 1910 for (i = 0; i < MAX_OUTPUTS; i++) 1911 cec_unregister_adapter(dev->cec_tx_adap[i]); 1912 if (dev->cec_workqueue) { 1913 vivid_cec_bus_free_work(dev); 1914 destroy_workqueue(dev->cec_workqueue); 1915 } 1916 free_dev: 1917 v4l2_device_put(&dev->v4l2_dev); 1918 return ret; 1919 } 1920 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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