tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: ea4dabbb4ad7eb52632a2ca0b8f89f0ea7c55dcf commit: 1a280f48c0e403903cf0b4231c95b948e664f25a [5982/10104] s390/kprobes: replace kretprobe with rethook config: s390-randconfig-r011-20230202 (https://download.01.org/0day-ci/archive/20230203/202302030102.69dZIuJk-lkp@xxxxxxxxx/config) compiler: s390-linux-gcc (GCC) 12.1.0 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=1a280f48c0e403903cf0b4231c95b948e664f25a 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 1a280f48c0e403903cf0b4231c95b948e664f25a # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> Note: functions only called from assembly code should be annotated with the asmlinkage attribute All warnings (new ones prefixed by >>): >> arch/s390/kernel/rethook.c:26:15: warning: no previous prototype for 'arch_rethook_trampoline_callback' [-Wmissing-prototypes] 26 | unsigned long arch_rethook_trampoline_callback(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/arch_rethook_trampoline_callback +26 arch/s390/kernel/rethook.c 22 23 /* 24 * Called from arch_rethook_trampoline 25 */ > 26 unsigned long arch_rethook_trampoline_callback(struct pt_regs *regs) 27 { 28 return rethook_trampoline_handler(regs, regs->gprs[15]); 29 } 30 NOKPROBE_SYMBOL(arch_rethook_trampoline_callback); 31 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
