tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/tracing_multi_ng_7
head:   c35e21f7c5e98d9c2a5056305f17127e05b6c209
commit: 0e2853298c650132bd493b742a587409f608a71a [26/30] bpf: Add support to create tracing multi link
config: powerpc-allnoconfig
compiler: powerpc-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/jolsa/perf.git/commit/?id=0e2853298c650132bd493b742a587409f608a71a
        git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
        git fetch --no-tags jolsa-perf bpf/tracing_multi_ng_7
        git checkout 0e2853298c650132bd493b742a587409f608a71a
        # 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=powerpc SHELL=/bin/bash arch/powerpc/kernel/

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 >>):

   In file included from include/trace/syscall.h:7,
                    from include/linux/syscalls.h:88,
                    from arch/powerpc/kernel/syscalls.c:19:
>> include/linux/trace_events.h:798:5: error: no previous prototype for 'bpf_tracing_multi_attach' [-Werror=missing-prototypes]
     798 | int bpf_tracing_multi_attach(struct bpf_prog *prog, const union bpf_attr *attr)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/bpf_tracing_multi_attach +798 include/linux/trace_events.h

   765	
   766	static inline int
   767	perf_event_query_prog_array(struct perf_event *event, void __user *info)
   768	{
   769		return -EOPNOTSUPP;
   770	}
   771	static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p)
   772	{
   773		return -EOPNOTSUPP;
   774	}
   775	static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p)
   776	{
   777		return -EOPNOTSUPP;
   778	}
   779	static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name)
   780	{
   781		return NULL;
   782	}
   783	static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp)
   784	{
   785	}
   786	static inline int bpf_get_perf_event_info(const struct perf_event *event,
   787						  u32 *prog_id, u32 *fd_type,
   788						  const char **buf, u64 *probe_offset,
   789						  u64 *probe_addr)
   790	{
   791		return -EOPNOTSUPP;
   792	}
   793	static inline int
   794	bpf_kprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
   795	{
   796		return -EOPNOTSUPP;
   797	}
 > 798	int bpf_tracing_multi_attach(struct bpf_prog *prog, const union bpf_attr *attr)
   799	{
   800		return -EOPNOTSUPP;
   801	}
   802	#endif
   803	

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