Hi, kernel test robot noticed the following build warnings: [auto build test WARNING on hid/for-next] [also build test WARNING on linus/master v6.5-rc6 next-20230817] [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/johannes-gnu-linux-rocks/hid-mcp2200-added-driver-for-GPIOs-of-MCP2200/20230817-172246 base: https://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git for-next patch link: https://lore.kernel.org/r/20230817091505.213318-1-johannes%40gnu-linux.rocks patch subject: [PATCH v4] hid-mcp2200: added driver for GPIOs of MCP2200 config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20230818/202308180056.nB1KSUap-lkp@xxxxxxxxx/config) compiler: sparc64-linux-gcc (GCC) 12.3.0 reproduce: (https://download.01.org/0day-ci/archive/20230818/202308180056.nB1KSUap-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/202308180056.nB1KSUap-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/hid/hid-mcp2200.c: In function 'mcp2200_remove': >> drivers/hid/hid-mcp2200.c:395:25: warning: variable 'mcp' set but not used [-Wunused-but-set-variable] 395 | struct mcp2200 *mcp; | ^~~ vim +/mcp +395 drivers/hid/hid-mcp2200.c 392 393 static void mcp2200_remove(struct hid_device *hdev) 394 { > 395 struct mcp2200 *mcp; 396 397 mcp = hid_get_drvdata(hdev); 398 } 399 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki