diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index bc266f6e9859..e9d60607a0bd 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -8464,7 +8464,6 @@ static noinline void reada_walk_down(struct btrfs_trans_handle *trans,
 	u64 refs;
 	u64 flags;
 	u32 nritems;
-	u32 blocksize;
 	struct btrfs_key key;
 	struct extent_buffer *eb;
 	int ret;
@@ -8482,7 +8481,6 @@ static noinline void reada_walk_down(struct btrfs_trans_handle *trans,
 
 	eb = path->nodes[wc->level];
 	nritems = btrfs_header_nritems(eb);
-	blocksize = root->nodesize;
 
 	for (slot = path->slots[wc->level]; slot < nritems; slot++) {
 		if (nread >= wc->reada_count)