tree: https://github.com/jimc/linux.git dd-drm-next head: 2eec9300d730ad634b967a853579f0b5dffecc01 commit: 25a6802d94cd0a8eb61882bcbf6acdec479a965b [19/20] reg-in-drmdrv config: openrisc-buildonly-randconfig-r003-20211013 (attached as .config) compiler: or1k-linux-gcc (GCC) 11.2.0 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/jimc/linux/commit/25a6802d94cd0a8eb61882bcbf6acdec479a... git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dd-drm-next git checkout 25a6802d94cd0a8eb61882bcbf6acdec479a965b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=openrisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/gpu/drm/drm_drv.c: In function 'drm_dev_register': 886 | ret = dynamic_debug_register_tracer(THIS_MODULE, drm_trace_printvaf); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/drm_drv.c: In function 'drm_dev_unregister': 957 | dynamic_debug_unregister_tracer(THIS_MODULE, drm_trace_printvaf); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/dynamic_debug_register_tracer +886 drivers/gpu/drm/drm_drv.c 840 841 /** 842 * drm_dev_register - Register DRM device 843 * @dev: Device to register 844 * @flags: Flags passed to the driver's .load() function 845 * 846 * Register the DRM device @dev with the system, advertise device to user-space 847 * and start normal device operation. @dev must be initialized via drm_dev_init() 848 * previously. 849 * 850 * Never call this twice on any device! 851 * 852 * NOTE: To ensure backward compatibility with existing drivers method this 853 * function calls the &drm_driver.load method after registering the device 854 * nodes, creating race conditions. Usage of the &drm_driver.load methods is 855 * therefore deprecated, drivers must perform all initialization before calling 856 * drm_dev_register(). 857 * 858 * RETURNS: 859 * 0 on success, negative error code on failure. 860 */ 861 int drm_dev_register(struct drm_device *dev, unsigned long flags) 862 { 863 const struct drm_driver *driver = dev->driver; 864 int ret; 865 866 if (!driver->load) 867 drm_mode_config_validate(dev); 868 869 WARN_ON(!dev->managed.final_kfree); 870 871 if (drm_dev_needs_global_mutex(dev)) 872 mutex_lock(&drm_global_mutex); 873 874 ret = drm_minor_register(dev, DRM_MINOR_RENDER); 875 if (ret) 876 goto err_minors; 877 878 ret = drm_minor_register(dev, DRM_MINOR_PRIMARY); 879 if (ret) 880 goto err_minors; 881 882 ret = create_compat_control_link(dev); 883 if (ret) 884 goto err_minors; 885 887 if (ret) 888 goto err_dyndbg; 889 890 dev->registered = true; 891 892 if (dev->driver->load) { 893 ret = dev->driver->load(dev, flags); 894 if (ret) 895 goto err_minors; 896 } 897 898 if (drm_core_check_feature(dev, DRIVER_MODESET)) 899 drm_modeset_register_all(dev); 900 901 DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n", 902 driver->name, driver->major, driver->minor, 903 driver->patchlevel, driver->date, 904 dev->dev ? dev_name(dev->dev) : "virtual device", 905 dev->primary->index); 906 907 goto out_unlock; 908 909 err_dyndbg: 910 dynamic_debug_register_tracer(THIS_MODULE, drm_trace_printvaf); 911 err_minors: 912 remove_compat_control_link(dev); 913 drm_minor_unregister(dev, DRM_MINOR_PRIMARY); 914 drm_minor_unregister(dev, DRM_MINOR_RENDER); 915 out_unlock: 916 if (drm_dev_needs_global_mutex(dev)) 917 mutex_unlock(&drm_global_mutex); 918 return ret; 919 } 920 EXPORT_SYMBOL(drm_dev_register); 921 922 /** 923 * drm_dev_unregister - Unregister DRM device 924 * @dev: Device to unregister 925 * 926 * Unregister the DRM device from the system. This does the reverse of 927 * drm_dev_register() but does not deallocate the device. The caller must call 928 * drm_dev_put() to drop their final reference. 929 * 930 * A special form of unregistering for hotpluggable devices is drm_dev_unplug(), 931 * which can be called while there are still open users of @dev. 932 * 933 * This should be called first in the device teardown code to make sure 934 * userspace can't access the device instance any more. 935 */ 936 void drm_dev_unregister(struct drm_device *dev) 937 { 938 if (drm_core_check_feature(dev, DRIVER_LEGACY)) 939 drm_lastclose(dev); 940 941 dev->registered = false; 942 943 drm_client_dev_unregister(dev); 944 945 if (drm_core_check_feature(dev, DRIVER_MODESET)) 946 drm_modeset_unregister_all(dev); 947 948 if (dev->driver->unload) 949 dev->driver->unload(dev); 950 951 drm_legacy_pci_agp_destroy(dev); 952 drm_legacy_rmmaps(dev); 953 954 remove_compat_control_link(dev); 955 drm_minor_unregister(dev, DRM_MINOR_PRIMARY); 956 drm_minor_unregister(dev, DRM_MINOR_RENDER); 958 } 959 EXPORT_SYMBOL(drm_dev_unregister); 960 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org