[001/107] perf include bpf: Add bpf_tail_call() prototype
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Message ID 20190730025610.22603-2-acme@kernel.org
State Accepted
Commit 941a7658e065e339ebdaf27b9a7702f9935d1d4a
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  • [001/107] perf include bpf: Add bpf_tail_call() prototype
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Commit Message

Arnaldo Carvalho de Melo July 30, 2019, 2:54 a.m. UTC
From: Arnaldo Carvalho de Melo <acme@redhat.com>

Will be used together with BPF_MAP_TYPE_PROG_ARRAY in

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(+)

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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) \