diff --git a/fs/super.c b/fs/super.c
index 954aeb8..7ea56de 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1199,7 +1199,7 @@
 	else
 		ret = percpu_down_read_trylock(sb->s_writers.rw_sem + level-1);
 
-	WARN_ON(force_trylock & !ret);
+	WARN_ON(force_trylock && !ret);
 	return ret;
 }
 EXPORT_SYMBOL(__sb_start_write);