diff --git a/block/fops.c b/block/fops.c
index 2c43e493e37c..21d25ee0e4bf 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -137,7 +137,7 @@ struct blkdev_dio {
 	size_t			size;
 	atomic_t		ref;
 	unsigned int		flags;
-	struct bio		bio;
+	struct bio		bio ____cacheline_aligned_in_smp;
 };
 
 static struct bio_set blkdev_dio_pool;