Hi Yizhen, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: c78205e40443cde6028b0539f30a00fda4167edd commit: 832e9fe8cf1ed02211ff43bd4f3f16ddc2d69969 [18663/30000] ub: ubcore add create/delete tp table api config: arm64-randconfig-003-20241029 (https://download.01.org/0day-ci/archive/20241101/202411010411.aKWhEHwD-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241101/202411010411.aKWhEHwD-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/202411010411.aKWhEHwD-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

drivers/ub/urma/ubcore/ubcore_tp.c:40:17: warning: no previous prototype for 'ubcore_get_mtu' [-Wmissing-prototypes] 40 | enum ubcore_mtu ubcore_get_mtu(int mtu) | ^~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_tp.c:75:19: warning: no previous prototype for 'ubcore_create_vtp' [-Wmissing-prototypes] 75 | struct ubcore_tp *ubcore_create_vtp(struct ubcore_device *dev, const union ubcore_eid *remote_eid, | ^~~~~~~~~~~~~~~~~ drivers/ub/urma/ubcore/ubcore_tp.c:83:5: warning: no previous prototype for 'ubcore_destroy_vtp' [-Wmissing-prototypes] 83 | int ubcore_destroy_vtp(struct ubcore_tp *vtp) | ^~~~~~~~~~~~~~~~~~

vim +/ubcore_get_mtu +40 drivers/ub/urma/ubcore/ubcore_tp.c c75b0bccca77778 Yizhen Fan 2023-09-14 39 c75b0bccca77778 Yizhen Fan 2023-09-14 @40 enum ubcore_mtu ubcore_get_mtu(int mtu) c75b0bccca77778 Yizhen Fan 2023-09-14 41 { c75b0bccca77778 Yizhen Fan 2023-09-14 42 mtu = mtu - UB_PROTOCOL_HEAD_BYTES; c75b0bccca77778 Yizhen Fan 2023-09-14 43 c75b0bccca77778 Yizhen Fan 2023-09-14 44 if (mtu >= ubcore_mtu_enum_to_int(UBCORE_MTU_8192)) c75b0bccca77778 Yizhen Fan 2023-09-14 45 return UBCORE_MTU_8192; c75b0bccca77778 Yizhen Fan 2023-09-14 46 if (mtu >= ubcore_mtu_enum_to_int(UBCORE_MTU_4096)) c75b0bccca77778 Yizhen Fan 2023-09-14 47 return UBCORE_MTU_4096; c75b0bccca77778 Yizhen Fan 2023-09-14 48 else if (mtu >= ubcore_mtu_enum_to_int(UBCORE_MTU_2048)) c75b0bccca77778 Yizhen Fan 2023-09-14 49 return UBCORE_MTU_2048; c75b0bccca77778 Yizhen Fan 2023-09-14 50 else if (mtu >= ubcore_mtu_enum_to_int(UBCORE_MTU_1024)) c75b0bccca77778 Yizhen Fan 2023-09-14 51 return UBCORE_MTU_1024; c75b0bccca77778 Yizhen Fan 2023-09-14 52 else if (mtu >= ubcore_mtu_enum_to_int(UBCORE_MTU_512)) c75b0bccca77778 Yizhen Fan 2023-09-14 53 return UBCORE_MTU_512; c75b0bccca77778 Yizhen Fan 2023-09-14 54 else if (mtu >= ubcore_mtu_enum_to_int(UBCORE_MTU_256)) c75b0bccca77778 Yizhen Fan 2023-09-14 55 return UBCORE_MTU_256; c75b0bccca77778 Yizhen Fan 2023-09-14 56 else c75b0bccca77778 Yizhen Fan 2023-09-14 57 return 0; c75b0bccca77778 Yizhen Fan 2023-09-14 58 } c75b0bccca77778 Yizhen Fan 2023-09-14 59 EXPORT_SYMBOL(ubcore_get_mtu); c75b0bccca77778 Yizhen Fan 2023-09-14 60 :::::: The code at line 40 was first introduced by commit :::::: c75b0bccca77778d5663004cb19d3dd31ef71f0a ub: ubcore add get_mtu and other APIs that will be used by the driver. :::::: TO: Yizhen Fan <fanyizhen@huawei.com> :::::: CC: fanyizhen1995 <en_0015767@163.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki