[kbuild-all] drivers/ptp/ptp_clockmatrix.c:809:12: warning: stack frame size of 18560 bytes in function '_idtcm_settime_deprecated'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: fd0aa1a4567d0f09e1bfe367a950b004f99ac290 commit: da9482332d581bb8ea69eca34d7f75a3c6247475 ptp: clockmatrix: deprecate firmware older than 4.8.7 date: 6 months ago config: riscv-randconfig-r036-20210618 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout da9482332d581bb8ea69eca34d7f75a3c6247475 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/ptp/ptp_clockmatrix.c:2205:12: warning: stack frame size of 17920 bytes in function 'idtcm_probe' [-Wframe-larger-than=] static int idtcm_probe(struct i2c_client *client, ^ static int _idtcm_settime_deprecated(struct idtcm_channel *channel, ^ 2 warnings generated. vim +/_idtcm_settime_deprecated +809 drivers/ptp/ptp_clockmatrix.c 808 810 struct timespec64 const *ts) 811 { 812 struct idtcm *idtcm = channel->idtcm; 813 int err; 814 815 err = _idtcm_set_dpll_hw_tod(channel, ts, HW_TOD_WR_TRIG_SEL_MSB); 816 817 if (err) { 818 dev_err(&idtcm->client->dev, 819 "%s: Set HW ToD failed\n", __func__); 820 return err; 821 } 822 823 return idtcm_sync_pps_output(channel); 824 } 825 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org