Hi William, kernel test robot noticed the following build warnings: [auto build test WARNING on robh/for-next] [also build test WARNING on linus/master mkl-can-next/testing v6.8-rc2 next-20240129] [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/William-Qiu/dt-bindings-vendor-prefixes-Add-cast-vendor-prefix/20240129-114752 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next patch link: https://lore.kernel.org/r/20240129031239.17037-4-william.qiu%40starfivetech.com patch subject: [PATCH v1 3/4] can: cast: add driver for CAST CAN controller config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20240130/202401300313.9DPa2nuW-lkp@xxxxxxxxx/config) compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 4a39d08908942b2d415db405844cbe4af73e75d4) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240130/202401300313.9DPa2nuW-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/202401300313.9DPa2nuW-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/net/can/cast_can.c:352:5: warning: no previous prototype for function 'ccan_get_freebuffer' [-Wmissing-prototypes] 352 | int ccan_get_freebuffer(struct ccan_priv *priv) | ^ drivers/net/can/cast_can.c:352:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 352 | int ccan_get_freebuffer(struct ccan_priv *priv) | ^ | static 1 warning generated. vim +/ccan_get_freebuffer +352 drivers/net/can/cast_can.c 351 > 352 int ccan_get_freebuffer(struct ccan_priv *priv) 353 { 354 /* Get next transmit buffer */ 355 ccan_reigister_set_bit(priv, CCAN_TCTRL_OFFSET, CCAN_SET_TENEXT_MASK); 356 357 if (ccan_ioread8(priv->reg_base + CCAN_TCTRL_OFFSET) & CCAN_SET_TENEXT_MASK) 358 return -EPERM; 359 360 return 0; 361 } 362 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
