Hi Hector, I love your patch! Yet something to improve: [auto build test ERROR on drm/drm-next] [also build test ERROR on v5.16-rc1] [cannot apply to next-20211118] [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/Hector-Martin/drm-simpledrm-Appl... base: git://anongit.freedesktop.org/drm/drm drm-next config: riscv-randconfig-r035-20211118 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c46becf500df2a7fb4b4fce16178a036c344315a) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/0day-ci/linux/commit/0be435c1fb3f0722a7099fee532925717... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Hector-Martin/drm-simpledrm-Apple-M1-DT-platform-support-fixes/20211117-230107 git checkout 0be435c1fb3f0722a7099fee532925717a67a42a # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/gpu/drm/tiny/ 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 >>): fs_initcall(simpledrm_init); ^ include/linux/module.h:119:27: note: expanded from macro 'fs_initcall' #define fs_initcall(fn) module_init(fn) ^ include/linux/module.h:131:42: note: expanded from macro 'module_init' static inline initcall_t __maybe_unused __inittest(void) \ ^ drivers/gpu/drm/tiny/simpledrm.c:899:1: note: previous definition is here module_platform_driver(simpledrm_platform_driver); ^ include/linux/platform_device.h:252:2: note: expanded from macro 'module_platform_driver' module_driver(__platform_driver, platform_driver_register, \ ^ include/linux/device/driver.h:262:3: note: expanded from macro 'module_driver' } \ ^ include/linux/module.h:131:42: note: expanded from macro '\ module_init' static inline initcall_t __maybe_unused __inittest(void) \ ^ fs_initcall(simpledrm_init); ^ include/linux/module.h:119:27: note: expanded from macro 'fs_initcall' #define fs_initcall(fn) module_init(fn) ^ include/linux/module.h:133:6: note: expanded from macro 'module_init' int init_module(void) __copy(initfn) \ ^ drivers/gpu/drm/tiny/simpledrm.c:899:1: note: previous definition is here module_platform_driver(simpledrm_platform_driver); ^ include/linux/platform_device.h:252:2: note: expanded from macro 'module_platform_driver' module_driver(__platform_driver, platform_driver_register, \ ^ include/linux/device/driver.h:262:3: note: expanded from macro 'module_driver' } \ ^ include/linux/module.h:133:6: note: expanded from macro '\ module_init' int init_module(void) __copy(initfn) \ ^ 2 errors generated. vim +/__inittest +915 drivers/gpu/drm/tiny/simpledrm.c 914 916 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org