tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/batch
head:   b81b17307e02f8e6d4abf87e7ec2d7e5aea1e0b5
commit: 2b71c5336e040b766d2e26c36252bb1be974d335 [3/27] x86/ftrace: Make function graph use ftrace directly
config: x86_64-randconfig-a004-20210829 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 4e1a164d7bd53653f79decc121afe784d2fde0a7)
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/jolsa/perf.git/commit/?id=2b71c5336e040b766d2e26c36252bb1be974d335
        git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
        git fetch --no-tags jolsa-perf bpf/batch
        git checkout 2b71c5336e040b766d2e26c36252bb1be974d335
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   kernel/trace/fgraph.c:234:15: warning: no previous prototype for function 'ftrace_return_to_handler' [-Wmissing-prototypes]
   unsigned long ftrace_return_to_handler(unsigned long frame_pointer)
                 ^
   kernel/trace/fgraph.c:234:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   unsigned long ftrace_return_to_handler(unsigned long frame_pointer)
   ^
   static 
>> kernel/trace/fgraph.c:341:8: error: use of undeclared identifier 'FTRACE_OPS_GRAPH_STUB'; did you mean 'FTRACE_OPS_FL_STUB'?
                                      FTRACE_OPS_GRAPH_STUB,
                                      ^~~~~~~~~~~~~~~~~~~~~
                                      FTRACE_OPS_FL_STUB
   include/linux/ftrace.h:184:2: note: 'FTRACE_OPS_FL_STUB' declared here
           FTRACE_OPS_FL_STUB                      = BIT(5),
           ^
   kernel/trace/fgraph.c:349:6: warning: no previous prototype for function 'ftrace_graph_sleep_time_control' [-Wmissing-prototypes]
   void ftrace_graph_sleep_time_control(bool enable)
        ^
   kernel/trace/fgraph.c:349:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void ftrace_graph_sleep_time_control(bool enable)
   ^
   static 
   2 warnings and 1 error generated.


vim +341 kernel/trace/fgraph.c

   336	
   337	static struct ftrace_ops graph_ops = {
   338		.func			= ftrace_graph_func,
   339		.flags			= FTRACE_OPS_FL_INITIALIZED |
   340					   FTRACE_OPS_FL_PID |
 > 341					   FTRACE_OPS_GRAPH_STUB,
   342	#ifdef FTRACE_GRAPH_TRAMP_ADDR
   343		.trampoline		= FTRACE_GRAPH_TRAMP_ADDR,
   344		/* trampoline_size is only needed for dynamically allocated tramps */
   345	#endif
   346		ASSIGN_OPS_HASH(graph_ops, &global_ops.local_hash)
   347	};
   348	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org