Hi Markus, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on wireless-drivers-next/master] [cannot apply to v5.4-rc7 next-20191115] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Markus-Theil/mt76-channel-switch-support-for-USB-devices/20191116-192204 base: https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next.git master reproduce: # apt-get install sparse # sparse version: v0.6.1-32-g233d4e1-dirty make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot sparse warnings: (new ones prefixed by >>) >> drivers/net/wireless/mediatek/mt76/mt76x2/usb_main.c:103:6: sparse: sparse: symbol 'mt76x2u_channel_switch_beacon' was not declared. Should it be static? Please review and possibly fold the followup patch. --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation