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    Subject[PATCH 001/107] perf include bpf: Add bpf_tail_call() prototype
    Date
    From: Arnaldo Carvalho de Melo <acme@redhat.com>

    Will be used together with BPF_MAP_TYPE_PROG_ARRAY in
    tools/perf/examples/bpf/augmented_raw_syscalls.c.

    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Link: https://lkml.kernel.org/n/tip-pd1bpy8i31nta6jqwdex871g@git.kernel.org
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    ---
    tools/perf/include/bpf/bpf.h | 2 ++
    1 file changed, 2 insertions(+)

    diff --git a/tools/perf/include/bpf/bpf.h b/tools/perf/include/bpf/bpf.h
    index 2eac6d804b2d..b422aeef5339 100644
    --- a/tools/perf/include/bpf/bpf.h
    +++ b/tools/perf/include/bpf/bpf.h
    @@ -45,6 +45,8 @@ struct ____btf_map_##name __attribute__((section(".maps." #name), used)) \
    static int (*bpf_map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags) = (void *)BPF_FUNC_map_update_elem;
    static void *(*bpf_map_lookup_elem)(struct bpf_map *map, void *key) = (void *)BPF_FUNC_map_lookup_elem;

    +static void (*bpf_tail_call)(void *ctx, void *map, int index) = (void *)BPF_FUNC_tail_call;
    +
    #define SEC(NAME) __attribute__((section(NAME), used))

    #define probe(function, vars) \
    --
    2.21.0
    \
     
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