Hi Yizhen, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 020e0507954f21291b7b3a0a280128270a0d8959 commit: dd9641804ad19402838975c28003465d0b42042a [2516/2516] ub: uburma add cmd create/delete jfs implementation. config: arm64-randconfig-003-20241203 (https://download.01.org/0day-ci/archive/20241203/202412031343.msPaVrnc-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241203/202412031343.msPaVrnc-lkp@i...) 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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412031343.msPaVrnc-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

drivers/ub/urma/uburma/uburma_cmd.c:144:6: warning: no previous prototype for 'uburma_jfs_event_cb' [-Wmissing-prototypes] 144 | void uburma_jfs_event_cb(struct ubcore_event *event, struct ubcore_ucontext *ctx) | ^~~~~~~~~~~~~~~~~~~

vim +/uburma_jfs_event_cb +144 drivers/ub/urma/uburma/uburma_cmd.c 143

144 void uburma_jfs_event_cb(struct ubcore_event *event, struct ubcore_ucontext *ctx) 145 { 146 struct uburma_jfs_uobj *jfs_uobj; 147 148 if (event->element.jfs == NULL) 149 return; 150 151 jfs_uobj = (struct uburma_jfs_uobj *)event->element.jfs->jfs_cfg.jfs_context; 152 uburma_write_async_event(ctx, event->element.jfs->urma_jfs, event->event_type, 153 &jfs_uobj->async_event_list, &jfs_uobj->async_events_reported); 154 } 155

-- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki