btrfs: Remove chunk_objectid parameter of btrfs_alloc_dev_extent

THe function is always called with chunk_objectid set to
BTRFS_FIRST_CHUNK_TREE_OBJECTID. Let's collapse the parameter in the
function itself. No functional changes.
Signed-off-by: NNikolay Borisov <nborisov@suse.com>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>

fs/btrfs/volumes.c

@@ -1571,8 +1571,8 @@ static int btrfs_free_dev_extent(struct btrfs_trans_handle *trans,
 
 static int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
 				  struct btrfs_device *device,
-				  u64 chunk_tree, u64 chunk_objectid,
-				  u64 chunk_offset, u64 start, u64 num_bytes)
+				  u64 chunk_tree, u64 chunk_offset, u64 start,
+				  u64 num_bytes)
 {
 	int ret;
 	struct btrfs_path *path;
@@ -1600,7 +1600,8 @@ static int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
 	extent = btrfs_item_ptr(leaf, path->slots[0],
 				struct btrfs_dev_extent);
 	btrfs_set_dev_extent_chunk_tree(leaf, extent, chunk_tree);
-	btrfs_set_dev_extent_chunk_objectid(leaf, extent, chunk_objectid);
+	btrfs_set_dev_extent_chunk_objectid(leaf, extent,
+					    BTRFS_FIRST_CHUNK_TREE_OBJECTID);
 	btrfs_set_dev_extent_chunk_offset(leaf, extent, chunk_offset);
 
 	btrfs_set_dev_extent_length(leaf, extent, num_bytes);
@@ -4904,7 +4905,6 @@ int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
 			break;
 		ret = btrfs_alloc_dev_extent(trans, device,
 					     chunk_root->root_key.objectid,
-					     BTRFS_FIRST_CHUNK_TREE_OBJECTID,
 					     chunk_offset, dev_offset,
 					     stripe_size);
 		if (ret)