Hi Arnd, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: f1244c81da13009dbf61cb807f45881501c44789 commit: d7445676e86900f8dc363825033ff62416c216e0 [1051/4957] ARM: versatile: move integrator/realview/vexpress to versatile config: arm-integrator_defconfig (https://download.01.org/0day-ci/archive/20220420/202204202059.7tV9FkRy-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-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/next/linux-next.git/commit/?id=d7445676e86900f8dc363825033ff62416c216e0 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout d7445676e86900f8dc363825033ff62416c216e0 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> arch/arm/mach-versatile/integrator_ap.c:148:13: warning: no previous prototype for 'ap_init_early' [-Wmissing-prototypes] 148 | void __init ap_init_early(void) | ^~~~~~~~~~~~~ vim +/ap_init_early +148 arch/arm/mach-versatile/integrator_ap.c 379df2793efdca arch/arm/mach-integrator/integrator_ap.c Linus Walleij 2012-11-17 147 a613163dff04cb arch/arm/mach-integrator/integrator_ap.c Linus Walleij 2012-06-11 @148 void __init ap_init_early(void) a613163dff04cb arch/arm/mach-integrator/integrator_ap.c Linus Walleij 2012-06-11 149 { a613163dff04cb arch/arm/mach-integrator/integrator_ap.c Linus Walleij 2012-06-11 150 } a613163dff04cb arch/arm/mach-integrator/integrator_ap.c Linus Walleij 2012-06-11 151 :::::: The code at line 148 was first introduced by commit :::::: a613163dff04cbfcb7d66b06ef4a5f65498ee59b ARM: integrator: convert to common clock :::::: TO: Linus Walleij <linus.walleij@xxxxxxxxxx> :::::: CC: Mike Turquette <mturquette@xxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://01.org/lkp
