perf tools: Factor out the map initialization

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <1256927305-4628-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 0273d83..13677b5 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1132,18 +1132,12 @@
 	struct map *self = malloc(sizeof(*self));
 
 	if (self != NULL) {
-		self->start = start;
 		/*
-		 * Will be filled after we load all the symbols
+		 * ->end will be filled after we load all the symbols
 		 */
-		self->end = 0;
-
-		self->pgoff = 0;
-		self->dso = dso;
-		self->map_ip = map__map_ip;
-		self->unmap_ip = map__unmap_ip;
-		RB_CLEAR_NODE(&self->rb_node);
+		map__init(self, start, 0, 0, dso);
 	}
+
 	return self;
 }