diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index c5c0d9cf1a80..a4e486a600be 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1806,7 +1806,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
 	}
 	/* see comments in should_cow_block() */
 	set_bit(BTRFS_ROOT_FORCE_COW, &root->state);
-	smp_wmb();
+	smp_mb__after_atomic();
 
 	btrfs_set_root_node(new_root_item, tmp);
 	/* record when the snapshot was created in key.offset */