We removed event types from data file in following commits:
  6065210 perf tools: Remove event types framework completely
  44b3c57 perf tools: Remove event types from perf data file

We no longer need this information, because we can get it
directly from tracepoints.

But we still need to handle PERF_RECORD_HEADER_EVENT_TYPE
event for the sake of old perf data files created in pipe
mode like:

  $ perf.3.4 record -o - foo >perf.data
  $ perf.312 report -i - < perf.data

Reported-by: Stephane Eranian <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Cc: Corey Ashford <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: David Ahern <[email protected]>
---
 tools/perf/util/session.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 0b39a48..5da6ce7 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1008,6 +1008,12 @@ static int perf_session__process_user_event(struct 
perf_session *session, union
                if (err == 0)
                        perf_session__set_id_hdr_size(session);
                return err;
+       case PERF_RECORD_HEADER_EVENT_TYPE:
+               /*
+                * Depreceated, but we need to handle it for sake
+                * of old data files create in pipe mode.
+                */
+               return 0;
        case PERF_RECORD_HEADER_TRACING_DATA:
                /* setup for reading amidst mmap */
                lseek(fd, file_offset, SEEK_SET);
-- 
1.8.3.1

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