Hi Fabrice, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on v6.5 next-20230830] [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/Fabrice-Gasnier/counter-chrdev-fix-getting-array-extensions/20230829-230111 base: linus/master patch link: https://lore.kernel.org/r/20230829134029.2402868-9-fabrice.gasnier%40foss.st.com patch subject: [PATCH 8/8] counter: stm32-timer-cnt: add support for events config: arm-randconfig-001-20230830 (https://download.01.org/0day-ci/archive/20230830/202308301541.ZqWpJdto-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230830/202308301541.ZqWpJdto-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/202308301541.ZqWpJdto-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/counter/stm32-timer-cnt.c:528:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] 528 | case COUNTER_EVENT_OVERFLOW_UNDERFLOW: | ^ drivers/counter/stm32-timer-cnt.c:528:2: note: insert '__attribute__((fallthrough));' to silence this warning 528 | case COUNTER_EVENT_OVERFLOW_UNDERFLOW: | ^ | __attribute__((fallthrough)); drivers/counter/stm32-timer-cnt.c:528:2: note: insert 'break;' to avoid fall-through 528 | case COUNTER_EVENT_OVERFLOW_UNDERFLOW: | ^ | break; 1 warning generated. vim +528 drivers/counter/stm32-timer-cnt.c 516 517 static int stm32_count_watch_validate(struct counter_device *counter, 518 const struct counter_watch *watch) 519 { 520 struct stm32_timer_cnt *const priv = counter_priv(counter); 521 522 switch (watch->event) { 523 case COUNTER_EVENT_CAPTURE: 524 if (watch->channel >= priv->nchannels) { 525 dev_err(counter->parent, "Invalid channel %d\n", watch->channel); 526 return -EINVAL; 527 } > 528 case COUNTER_EVENT_OVERFLOW_UNDERFLOW: 529 return 0; 530 default: 531 return -EINVAL; 532 } 533 } 534 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
