Hi Manikandan, kernel test robot noticed the following build warnings: [auto build test WARNING on drm-misc/drm-misc-next] [also build test WARNING on lee-mfd/for-mfd-next lee-leds/for-leds-next lee-mfd/for-mfd-fixes linus/master v6.5-rc6 next-20230817] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Manikandan-Muralidharan/mfd-atmel-hlcdc-Add-compatible-for-sam9x75-XLCD-controller/20230817-172003 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20230817091250.225512-6-manikandan.m%40microchip.com patch subject: [PATCH v3 5/8] drm: atmel_hlcdc: Add support for XLCDC in atmel LCD driver config: arm-randconfig-r046-20230817 (https://download.01.org/0day-ci/archive/20230817/202308172303.AgUIhGKY-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce: (https://download.01.org/0day-ci/archive/20230817/202308172303.AgUIhGKY-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202308172303.AgUIhGKY-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c:1013:6: warning: no previous prototype for function 'hlcdc_irq_dbg' [-Wmissing-prototypes] 1013 | void hlcdc_irq_dbg(struct atmel_hlcdc_plane *plane, | ^ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c:1013:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1013 | void hlcdc_irq_dbg(struct atmel_hlcdc_plane *plane, | ^ | static >> drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c:1029:6: warning: no previous prototype for function 'xlcdc_irq_dbg' [-Wmissing-prototypes] 1029 | void xlcdc_irq_dbg(struct atmel_hlcdc_plane *plane, | ^ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c:1029:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1029 | void xlcdc_irq_dbg(struct atmel_hlcdc_plane *plane, | ^ | static 2 warnings generated. vim +/hlcdc_irq_dbg +1013 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c 1012 > 1013 void hlcdc_irq_dbg(struct atmel_hlcdc_plane *plane, 1014 const struct atmel_hlcdc_layer_desc *desc) 1015 { 1016 u32 isr = atmel_hlcdc_layer_read_reg(&plane->layer, ATMEL_HLCDC_LAYER_ISR); 1017 1018 /* 1019 * There's not much we can do in case of overrun except informing 1020 * the user. However, we are in interrupt context here, hence the 1021 * use of dev_dbg(). 1022 */ 1023 if (isr & 1024 (ATMEL_HLCDC_LAYER_OVR_IRQ(0) | ATMEL_HLCDC_LAYER_OVR_IRQ(1) | 1025 ATMEL_HLCDC_LAYER_OVR_IRQ(2))) 1026 pr_warn("%s: overrun on plane %s\n", __func__, desc->name); 1027 } 1028 > 1029 void xlcdc_irq_dbg(struct atmel_hlcdc_plane *plane, 1030 const struct atmel_hlcdc_layer_desc *desc) 1031 { 1032 u32 isr = atmel_hlcdc_layer_read_reg(&plane->layer, ATMEL_XLCDC_LAYER_ISR); 1033 1034 /* 1035 * There's not much we can do in case of overrun except informing 1036 * the user. However, we are in interrupt context here, hence the 1037 * use of dev_dbg(). 1038 */ 1039 if (isr & 1040 (ATMEL_XLCDC_LAYER_OVR_IRQ(0) | ATMEL_XLCDC_LAYER_OVR_IRQ(1) | 1041 ATMEL_XLCDC_LAYER_OVR_IRQ(2))) 1042 pr_warn("%s: overrun on plane %s\n", __func__, desc->name); 1043 } 1044 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
