perf diff: Add missing handler for PERF_RECORD_MMAP2 events

Without mmap2, perf diff fails to find the symbol name. The default
symbol sort key doesn't work well.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1416328700-1836-2-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 25114c9a6801..1ce425d101a9 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -357,6 +357,7 @@ static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
 static struct perf_tool tool = {
         .sample = diff__process_sample_event,
         .mmap   = perf_event__process_mmap,
+        .mmap2  = perf_event__process_mmap2,
         .comm   = perf_event__process_comm,
         .exit   = perf_event__process_exit,
         .fork   = perf_event__process_fork,