perf symbols: Introduce symbol_type__is_a

For selecting the right types of symbols in /proc/kallsyms, will be
followed by elf_symbol_type__is_a, for the same purpose on ELF
symtabs.

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: <1260550239-5372-2-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 c7a78eef8..d9a65d9 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -103,10 +103,10 @@
 
 enum map_type {
 	MAP__FUNCTION = 0,
-
-	MAP__NR_TYPES,
 };
 
+#define MAP__NR_TYPES (MAP__FUNCTION + 1)
+
 struct map {
 	union {
 		struct rb_node	rb_node;