Structs don't change and so constify.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/builtin-lock.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 78fb39d06e7c..735e6bb234ae 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -1179,7 +1179,7 @@ static int report_lock_contention_end_event(struct perf_sample *sample)
 
 /* lock oriented handlers */
 /* TODO: handlers for CPU oriented, thread oriented */
-static struct trace_lock_handler report_lock_ops  = {
+static const struct trace_lock_handler report_lock_ops  = {
 	.acquire_event		= report_lock_acquire_event,
 	.acquired_event		= report_lock_acquired_event,
 	.contended_event	= report_lock_contended_event,
@@ -1188,13 +1188,13 @@ static struct trace_lock_handler report_lock_ops  = {
 	.contention_end_event	= report_lock_contention_end_event,
 };
 
-static struct trace_lock_handler contention_lock_ops  = {
+static const struct trace_lock_handler contention_lock_ops  = {
 	.contention_begin_event	= report_lock_contention_begin_event,
 	.contention_end_event	= report_lock_contention_end_event,
 };
 
 
-static struct trace_lock_handler *trace_handler;
+static const struct trace_lock_handler *trace_handler;
 
 static int evsel__process_lock_acquire(struct perf_sample *sample)
 {
-- 
2.53.0.239.g8d8fc8a987-goog