[kbuild-all] Re: drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:2393:5: warning: no previous prototype for 'mt7915_mcu_set_fixed_rate'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5833291ab6de9c3e2374336b51c814e515e8f3a5 commit: 9a93364d6595358a11d07e7f4261ae263ae2a02a mt76: mt7915: rework debugfs fixed-rate knob date: 3 weeks ago config: ia64-randconfig-c003-20211025 (attached as .config) compiler: ia64-linux-gcc (GCC) 11.2.0 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 # 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 9a93364d6595358a11d07e7f4261ae263ae2a02a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=ia64 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/net/wireless/mediatek/mt76/mt7915/mcu.c:2393:5: warning: > > no previous prototype for 'mt7915_mcu_set_fixed_rate' [-Wmissing- > > prototypes] 2393 | int mt7915_mcu_set_fixed_rate(struct mt7915_dev *dev, | ^~~~~~~~~~~~~~~~~~~~~~~~