Blackfin: export show_stack() to modules

Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index fccf741..5994597 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -944,6 +944,7 @@
 	}
 #endif
 }
+EXPORT_SYMBOL(show_stack);
 
 void dump_stack(void)
 {