perf session: Move total_unknown to perf_session->unknown events

As this is a session property, not belonging to perf_event_ops,
that can be shared by many perf_session instances.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1261957026-15580-7-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index bc84a52..4ca427f 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -66,6 +66,7 @@
 	self->mmap_window = 32;
 	self->cwd = NULL;
 	self->cwdlen = 0;
+	self->unknown_events = 0;
 	map_groups__init(&self->kmaps);
 
 	if (perf_session__create_kernel_maps(self) < 0)
@@ -239,7 +240,7 @@
 	case PERF_RECORD_UNTHROTTLE:
 		return ops->process_unthrottle_event(event, self);
 	default:
-		ops->total_unknown++;
+		self->unknown_events++;
 		return -1;
 	}
 }