tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/fineibt
head:   ad50fd37eb1b4cca1cd54a4dd7effd6188e07507
commit: 60af5a4d862a0a8774d07fd3d9884784be591863 [61/62] ftrace,kcfi: Separate ftrace_stub() and ftrace_stub_graph()
config: s390-defconfig
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/peterz/queue.git/commit/?id=60af5a4d862a0a8774d07fd3d9884784be591863
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue x86/fineibt
        git checkout 60af5a4d862a0a8774d07fd3d9884784be591863
        # 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 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   s390-linux-ld: kernel/trace/fgraph.o: in function `unregister_ftrace_graph':
>> kernel/trace/fgraph.c:655: undefined reference to `ftrace_stub_graph'
>> s390-linux-ld: kernel/trace/fgraph.o:kernel/trace/fgraph.c:375: undefined reference to `ftrace_stub_graph'
   pahole: .tmp_vmlinux.btf: No such file or directory
   .btf.vmlinux.bin.o: file not recognized: file format not recognized


vim +655 kernel/trace/fgraph.c

e73e679f656e678b Steven Rostedt (VMware  2018-11-15  646) 
688f7089d8851b1a Steven Rostedt (VMware  2018-11-15  647) void unregister_ftrace_graph(struct fgraph_ops *gops)
e73e679f656e678b Steven Rostedt (VMware  2018-11-15  648) {
e73e679f656e678b Steven Rostedt (VMware  2018-11-15  649) 	mutex_lock(&ftrace_lock);
e73e679f656e678b Steven Rostedt (VMware  2018-11-15  650) 
e73e679f656e678b Steven Rostedt (VMware  2018-11-15  651) 	if (unlikely(!ftrace_graph_active))
e73e679f656e678b Steven Rostedt (VMware  2018-11-15  652) 		goto out;
e73e679f656e678b Steven Rostedt (VMware  2018-11-15  653) 
e73e679f656e678b Steven Rostedt (VMware  2018-11-15  654) 	ftrace_graph_active--;
46f9469247c6f469 Steven Rostedt (VMware  2019-11-18 @655) 	ftrace_graph_return = ftrace_stub_graph;

:::::: The code at line 655 was first introduced by commit
:::::: 46f9469247c6f4697cbbf37e4b3961120bf07f29 ftrace: Rename ftrace_graph_stub to ftrace_stub_graph

:::::: TO: Steven Rostedt (VMware) <rostedt@goodmis.org>
:::::: CC: Steven Rostedt (VMware) <rostedt@goodmis.org>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp