perf ordered_events: Shorten function signatures

By keeping pointers to machines, evlist and tool in ordered_events.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-0c6huyaf59mqtm2ek9pmposl@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
index e372e03..1afd381 100644
--- a/tools/perf/util/data-convert-bt.c
+++ b/tools/perf/util/data-convert-bt.c
@@ -579,7 +579,7 @@
 		return -1;
 
 	/* perf.data session */
-	session = perf_session__new(&file, 0, NULL);
+	session = perf_session__new(&file, 0, &c.tool);
 	if (!session)
 		goto free_writer;
 
@@ -591,7 +591,7 @@
 	if (setup_events(cw, session))
 		goto free_session;
 
-	err = perf_session__process_events(session, &c.tool);
+	err = perf_session__process_events(session);
 	if (!err)
 		err = bt_ctf_stream_flush(cw->stream);