Hi Jocelyn, kernel test robot noticed the following build warnings: [auto build test WARNING on 457391b0380335d5e9a5babdec90ac53928b23b4] url: https://github.com/intel-lab-lkp/linux/commits/Jocelyn-Falempe/drm-mgag200-Rename-constant-MGAREG_Status-to-MGAREG_STATUS/20230505-204705 base: 457391b0380335d5e9a5babdec90ac53928b23b4 patch link: https://lore.kernel.org/r/20230505124337.854845-4-jfalempe%40redhat.com patch subject: [PATCH 3/4] drm/mgag200: Add IRQ support config: i386-randconfig-a013-20230501 (https://download.01.org/0day-ci/archive/20230505/202305052227.GGoicr9j-lkp@xxxxxxxxx/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1) 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/intel-lab-lkp/linux/commit/cbbd69ea02ffdcee64621b76bf22cb360d943294 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Jocelyn-Falempe/drm-mgag200-Rename-constant-MGAREG_Status-to-MGAREG_STATUS/20230505-204705 git checkout cbbd69ea02ffdcee64621b76bf22cb360d943294 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/mgag200/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202305052227.GGoicr9j-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/mgag200/mgag200_drv.c:113:13: warning: no previous prototype for function 'mgag200_driver_irq_handler' [-Wmissing-prototypes] irqreturn_t mgag200_driver_irq_handler(int irq, void *arg) ^ drivers/gpu/drm/mgag200/mgag200_drv.c:113:1: note: declare 'static' if the function is not intended to be used outside of this translation unit irqreturn_t mgag200_driver_irq_handler(int irq, void *arg) ^ static >> drivers/gpu/drm/mgag200/mgag200_drv.c:129:6: warning: no previous prototype for function 'mgag200_init_irq' [-Wmissing-prototypes] void mgag200_init_irq(struct mga_device *mdev) ^ drivers/gpu/drm/mgag200/mgag200_drv.c:129:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void mgag200_init_irq(struct mga_device *mdev) ^ static >> drivers/gpu/drm/mgag200/mgag200_drv.c:137:6: warning: no previous prototype for function 'mgag200_enable_irq' [-Wmissing-prototypes] void mgag200_enable_irq(struct mga_device *mdev) ^ drivers/gpu/drm/mgag200/mgag200_drv.c:137:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void mgag200_enable_irq(struct mga_device *mdev) ^ static 3 warnings generated. vim +/mgag200_driver_irq_handler +113 drivers/gpu/drm/mgag200/mgag200_drv.c 112 > 113 irqreturn_t mgag200_driver_irq_handler(int irq, void *arg) 114 { 115 struct mga_device *mdev = (struct mga_device *) arg; 116 u32 status; 117 118 status = RREG32(MGAREG_STATUS); 119 120 if (status & MGAIRQ_SOFTRAP) { 121 WREG32(MGAREG_ICLEAR, MGAIRQ_SOFTRAP); 122 mdev->dma_in_use = 0; 123 wake_up(&mdev->waitq); 124 return IRQ_HANDLED; 125 } 126 return IRQ_NONE; 127 } 128 > 129 void mgag200_init_irq(struct mga_device *mdev) 130 { 131 /* Disable *all* interrupts */ 132 WREG32(MGAREG_IEN, 0); 133 /* Clear bits if they're already high */ 134 WREG32(MGAREG_ICLEAR, 0xf); 135 } 136 > 137 void mgag200_enable_irq(struct mga_device *mdev) 138 { 139 /* Enable only Softrap IRQ */ 140 WREG32(MGAREG_IEN, MGAIRQ_SOFTRAP); 141 } 142 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
