Hi "Christian, I love your patch! Perhaps something to improve: [auto build test WARNING on drm-tip/drm-tip] [also build test WARNING on next-20210125] [cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next linus/master drm/drm-next v5.11-rc5] [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/Christian-K-nig/drm-ttm-rework-ttm_tt-page-limit-v3/20210126-140030 base: git://anongit.freedesktop.org/drm/drm-tip drm-tip config: x86_64-randconfig-a003-20210126 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 925ae8c790c7e354f12ec14a6cac6aa49fc75b29) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/8bdbdb659aa407a4f3e28dab6d6465304d326888 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Christian-K-nig/drm-ttm-rework-ttm_tt-page-limit-v3/20210126-140030 git checkout 8bdbdb659aa407a4f3e28dab6d6465304d326888 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/gpu/drm/vmwgfx/vmwgfx_drv.c:1515:44: warning: variable 'vmw' is uninitialized when used here [-Wuninitialized] ret = ttm_mem_global_init(&ttm_mem_glob, &vmw->drm); ^~~ drivers/gpu/drm/vmwgfx/vmwgfx_drv.c:1504:25: note: initialize the variable 'vmw' to silence this warning struct vmw_private *vmw; ^ = NULL 1 warning generated. vim +/vmw +1515 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c 1501 1502 static int vmw_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1503 { 1504 struct vmw_private *vmw; 1505 int ret; 1506 1507 ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "svgadrmfb"); 1508 if (ret) 1509 return ret; 1510 1511 ret = pcim_enable_device(pdev); 1512 if (ret) 1513 return ret; 1514 > 1515 ret = ttm_mem_global_init(&ttm_mem_glob, &vmw->drm); 1516 if (ret) 1517 return ret; 1518 1519 vmw = devm_drm_dev_alloc(&pdev->dev, &driver, 1520 struct vmw_private, drm); 1521 if (IS_ERR(vmw)) 1522 return PTR_ERR(vmw); 1523 1524 pci_set_drvdata(pdev, &vmw->drm); 1525 1526 ret = vmw_driver_load(vmw, ent->device); 1527 if (ret) 1528 return ret; 1529 1530 ret = drm_dev_register(&vmw->drm, 0); 1531 if (ret) { 1532 vmw_driver_unload(&vmw->drm); 1533 return ret; 1534 } 1535 1536 return 0; 1537 } 1538 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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