trivial patch to dm-exception-store.c

diff -ur rc2-mm1-UDM1-original/drivers/md/dm-exception-store.c rc2-mm1-UDM1-patched/drivers/md/dm-exception-store.c
@@ -588,17 +588,17 @@
 	sector_t next_free;
 };
 
-void transient_destroy(struct exception_store *store)
+static void transient_destroy(struct exception_store *store)
 {
 	kfree(store->context);
 }
 
-int transient_read_metadata(struct exception_store *store)
+static int transient_read_metadata(struct exception_store *store)
 {
 	return 0;
 }
 
-int transient_prepare(struct exception_store *store, struct exception *e)
+static int transient_prepare(struct exception_store *store, struct exception *e)
 {
 	struct transient_c *tc = (struct transient_c *) store->context;
 	sector_t size = get_dev_size(store->snap->cow->bdev);

@@ -612,7 +612,7 @@
 	return 0;
 }
 
-void transient_commit(struct exception_store *store,
+static void transient_commit(struct exception_store *store,
 		      struct exception *e,
 		      void (*callback) (void *, int success),
 		      void *callback_context)