Hi Fabricio, kernel test robot noticed the following build warnings: [auto build test WARNING on staging/staging-testing] url: https://github.com/intel-lab-lkp/linux/commits/Fabricio-Gasperin/staging-sm750fb-Rename-variable-sm750_hw_cursor_setData2/20240921-232248 base: staging/staging-testing patch link: https://lore.kernel.org/r/20240921152124.11560-1-fgasperin%40lkcamp.dev patch subject: [PATCH] staging: sm750fb: Rename variable sm750_hw_cursor_setData2 config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20240922/202409220704.MXWsOMfL-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240922/202409220704.MXWsOMfL-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/202409220704.MXWsOMfL-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/staging/sm750fb/sm750_cursor.c:134:6: warning: no previous prototype for 'sm750_hw_cursor_setdata2' [-Wmissing-prototypes] 134 | void sm750_hw_cursor_setdata2(struct lynx_cursor *cursor, u16 rop, | ^~~~~~~~~~~~~~~~~~~~~~~~ vim +/sm750_hw_cursor_setdata2 +134 drivers/staging/sm750fb/sm750_cursor.c 133 > 134 void sm750_hw_cursor_setdata2(struct lynx_cursor *cursor, u16 rop, -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki