linux-kernel - [tip:perf/core] perf session: Always initialize ordered

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Date:	Thu, 2 Apr 2015 05:24:11 -0700
From:	tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, fweisbec@...il.com, dsahern@...il.com,
	eranian@...gle.com, dzickus@...hat.com, jolsa@...hat.com,
	linux-kernel@...r.kernel.org, acme@...hat.com, namhyung@...nel.org,
	adrian.hunter@...el.com, bp@...e.de, tglx@...utronix.de,
	mingo@...nel.org
Subject: [tip:perf/core] perf session: Always initialize ordered_events

Commit-ID:  aae59fab978e143f24d22e52f075c4be3ee4e628
Gitweb:     http://git.kernel.org/tip/aae59fab978e143f24d22e52f075c4be3ee4e628
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Tue, 31 Mar 2015 09:53:50 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 31 Mar 2015 17:52:31 -0300

perf session: Always initialize ordered_events

Even when it is not used to actually reorder events, some of its fields
are used, like session->ordered_events->tool, to shorten function
signatures where tool, for instance, was being passed, as the tool is
needed for the ordered_events code, we need it there and might as well
use it for other perf_session needs.

This fixes a problem where 'perf script' had some condition that made
session->ordered_events not to be initialized even with its
script->tool ordered_events related flags asking for it to be, which
looks like another bug and needs to be investigated further.

Always initializing session->ordered_events at least leaves the current
assumptions in place, so do it now.

Reported-by: David Ahern <dsahern@...il.com>
Reviewed-by: David Ahern <dsahern@...il.com>
Tested-by: David Ahern <dsahern@...il.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Borislav Petkov <bp@...e.de>
Cc: Don Zickus <dzickus@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-b1xxk0rwkz2a0gip1uufmjqg@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/session.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index adf0740..89c6679 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -110,6 +110,8 @@ struct perf_session *perf_session__new(struct perf_data_file *file,
 
 	session->repipe = repipe;
 	machines__init(&session->machines);
+	ordered_events__init(&session->ordered_events, &session->machines,
+			     session->evlist, tool, ordered_events__deliver_event);
 
 	if (file) {
 		if (perf_data_file__open(file))
@@ -139,9 +141,6 @@ struct perf_session *perf_session__new(struct perf_data_file *file,
 	    tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
 		dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 		tool->ordered_events = false;
-	} else {
-		ordered_events__init(&session->ordered_events, &session->machines,
-				     session->evlist, tool, ordered_events__deliver_event);
 	}
 
 	return session;
--
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