* this uses that block instead of allocating a new one. btrfs_alloc_reserved_extent
* is used to finish the allocation.
*/
-int noinline __btrfs_cow_block(struct btrfs_trans_handle *trans,
+static int noinline __btrfs_cow_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct extent_buffer *buf,
struct extent_buffer *parent, int parent_slot,