trivial patch to dm-strip.e

diff -ur linux-2.6.6-rc2-udm1-original/drivers/md/dm-stripe.c linux-2.6.6-rc2-udm1-patched/drivers/md/dm-stripe.c
@@ -232,7 +232,7 @@
 	return r;
 }
 
-void dm_stripe_exit(void)
+void __exit dm_stripe_exit(void)
 {
 	if (dm_unregister_target(&stripe_target))
 		DMWARN("striped target unregistration failed");