[tip:perf/core] perf tools: Add missing struct definition in probe_event.h

[tip-bot for Wang Nan]

Commit-ID:  d6be16719e0b65f586ae4a301f02407422e6b5dd
Gitweb:     http://git.kernel.org/tip/d6be16719e0b65f586ae4a301f02407422e6b5dd
Author:     Wang Nan <wangnan0@xxxxxxxxxx>
AuthorDate: Tue, 15 Nov 2016 04:05:46 +0000
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Fri, 25 Nov 2016 11:25:46 -0300

perf tools: Add missing struct definition in probe_event.h

Commit 0b3c2264ae30 ("perf symbols: Fix kallsyms perf test on ppc64le")
refers struct symbol in probe_event.h, but forgets to include its
definition.  Gcc will complain about it when that definition is not
added, by sheer luck, by some other header included before
probe_event.h.

Signed-off-by: Wang Nan <wangnan0@xxxxxxxxxx>
Cc: Alexei Starovoitov <ast@xxxxxx>
Cc: He Kuang <hekuang@xxxxxxxxxx>
Cc: Naveen N. Rao <naveen.n.rao@xxxxxxxxxxxxxxxxxx>
Cc: Zefan Li <lizefan@xxxxxxxxxx>
Cc: pi3orama@xxxxxxx
Link: http://lkml.kernel.org/r/20161115040617.69788-4-wangnan0@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/probe-event.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h
index 8091d15..5d4e940 100644
--- a/tools/perf/util/probe-event.h
+++ b/tools/perf/util/probe-event.h
@@ -18,6 +18,8 @@ struct probe_conf {
 extern struct probe_conf probe_conf;
 extern bool probe_event_dry_run;
 
+struct symbol;
+
 /* kprobe-tracer and uprobe-tracer tracing point */
 struct probe_trace_point {
 	char		*realname;	/* function real name (if needed) */