linux-kernel - [jolsa-perf:bpf/tracing_multi 12/18] include/linux/trace_events.h:797:5: error: no previous prototype for 'bpf_tracing_multi

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Message-ID: <202208050220.aexUPtTV-lkp@intel.com>
Date:   Fri, 5 Aug 2022 03:05:32 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [jolsa-perf:bpf/tracing_multi 12/18]
 include/linux/trace_events.h:797:5: error: no previous prototype for
 'bpf_tracing_multi_attach'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/tracing_multi
head:   3f77a2c51293ea19f1ce6a9b06b9fa394beecd13
commit: e005380dc118dbc67a921f1797c50541f4c3f1e5 [12/18] bpf: Add support to create tracing multi link
config: i386-defconfig (https://download.01.org/0day-ci/archive/20220805/202208050220.aexUPtTV-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=e005380dc118dbc67a921f1797c50541f4c3f1e5
        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
        git checkout e005380dc118dbc67a921f1797c50541f4c3f1e5
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   In file included from include/trace/trace_events.h:21,
                    from include/trace/define_trace.h:102,
                    from drivers/gpu/drm/i915/i915_trace.h:770,
                    from drivers/gpu/drm/i915/i915_trace_points.c:13:
>> include/linux/trace_events.h:797:5: error: no previous prototype for 'bpf_tracing_multi_attach' [-Werror=missing-prototypes]
     797 | 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 +797 include/linux/trace_events.h

   764	
   765	static inline int
   766	perf_event_query_prog_array(struct perf_event *event, void __user *info)
   767	{
   768		return -EOPNOTSUPP;
   769	}
   770	static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p)
   771	{
   772		return -EOPNOTSUPP;
   773	}
   774	static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p)
   775	{
   776		return -EOPNOTSUPP;
   777	}
   778	static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name)
   779	{
   780		return NULL;
   781	}
   782	static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp)
   783	{
   784	}
   785	static inline int bpf_get_perf_event_info(const struct perf_event *event,
   786						  u32 *prog_id, u32 *fd_type,
   787						  const char **buf, u64 *probe_offset,
   788						  u64 *probe_addr)
   789	{
   790		return -EOPNOTSUPP;
   791	}
   792	static inline int
   793	bpf_kprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
   794	{
   795		return -EOPNOTSUPP;
   796	}
 > 797	int bpf_tracing_multi_attach(struct bpf_prog *prog, const union bpf_attr *attr)
   798	{
   799		return -EOPNOTSUPP;
   800	}
   801	#endif
   802	

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