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/event.h b/tools/perf/util/event.h
index 3064a05..4a158a0 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -105,6 +105,8 @@
 
 typedef int (*symbol_filter_t)(struct map *map, struct symbol *sym);
 
+void map__init(struct map *self, u64 start, u64 end, u64 pgoff,
+	       struct dso *dso);
 struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen,
 		     unsigned int sym_priv_size);
 struct map *map__clone(struct map *self);