tree: https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git ftrace-regs head: 88610b6f216a17265a798caaefa557a8a73338f7 commit: ee600f9e55a19811b2e069cd405ea1dd4ea18819 [24/26] ftrace: Have the callbacks receive a struct ftrace_regs instead of pt_regs config: s390-allyesconfig (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 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/rostedt/linux-trace.git/c... git remote add trace https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git git fetch --no-tags trace ftrace-regs git checkout ee600f9e55a19811b2e069cd405ea1dd4ea18819 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): 3714 | .func = function_test_events_call, | ^~~~~~~~~~~~~~~~~~~~~~~~~ kernel/trace/trace_events.c:3714:10: note: (near initialization for 'trace_ops.func') cc1: some warnings being treated as errors -- 61 | .func = pstore_ftrace_call, | ^~~~~~~~~~~~~~~~~~ fs/pstore/ftrace.c:61:10: note: (near initialization for 'pstore_ftrace_ops.func') cc1: some warnings being treated as errors vim +3714 kernel/trace/trace_events.c 9ea21c1ecdb35ec Steven Rostedt 2009-04-16 3711 9ea21c1ecdb35ec Steven Rostedt 2009-04-16 3712 static struct ftrace_ops trace_ops __initdata = 9ea21c1ecdb35ec Steven Rostedt 2009-04-16 3713 { 9ea21c1ecdb35ec Steven Rostedt 2009-04-16 @3714 .func = function_test_events_call, 9ea21c1ecdb35ec Steven Rostedt 2009-04-16 3715 }; 9ea21c1ecdb35ec Steven Rostedt 2009-04-16 3716 :::::: The code at line 3714 was first introduced by commit :::::: 9ea21c1ecdb35ecdcac5fd9d95f62a1f6a7ffec0 tracing/events: perform function tracing in event selftests :::::: TO: Steven Rostedt <srostedt(a)redhat.com&gt; :::::: CC: Ingo Molnar <mingo(a)elte.hu&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org