else
                btrfs_set_header_owner(cow, new_root_objectid);
 
-       write_extent_buffer(cow, root->fs_info->fsid, btrfs_header_fsid(cow),
+       write_extent_buffer(cow, root->fs_info->fsid, btrfs_header_fsid(),
                            BTRFS_FSID_SIZE);
 
        WARN_ON(btrfs_header_generation(buf) > trans->transid);
        else
                btrfs_set_header_owner(cow, root->root_key.objectid);
 
-       write_extent_buffer(cow, root->fs_info->fsid, btrfs_header_fsid(cow),
+       write_extent_buffer(cow, root->fs_info->fsid, btrfs_header_fsid(),
                            BTRFS_FSID_SIZE);
 
        ret = update_ref_for_cow(trans, root, buf, cow, &last_ref);
        btrfs_set_header_backref_rev(c, BTRFS_MIXED_BACKREF_REV);
        btrfs_set_header_owner(c, root->root_key.objectid);
 
-       write_extent_buffer(c, root->fs_info->fsid, btrfs_header_fsid(c),
+       write_extent_buffer(c, root->fs_info->fsid, btrfs_header_fsid(),
                            BTRFS_FSID_SIZE);
 
        write_extent_buffer(c, root->fs_info->chunk_tree_uuid,
        btrfs_set_header_backref_rev(split, BTRFS_MIXED_BACKREF_REV);
        btrfs_set_header_owner(split, root->root_key.objectid);
        write_extent_buffer(split, root->fs_info->fsid,
-                           btrfs_header_fsid(split), BTRFS_FSID_SIZE);
+                           btrfs_header_fsid(), BTRFS_FSID_SIZE);
        write_extent_buffer(split, root->fs_info->chunk_tree_uuid,
                            btrfs_header_chunk_tree_uuid(split),
                            BTRFS_UUID_SIZE);
        btrfs_set_header_owner(right, root->root_key.objectid);
        btrfs_set_header_level(right, 0);
        write_extent_buffer(right, root->fs_info->fsid,
-                           btrfs_header_fsid(right), BTRFS_FSID_SIZE);
+                           btrfs_header_fsid(), BTRFS_FSID_SIZE);
 
        write_extent_buffer(right, root->fs_info->chunk_tree_uuid,
                            btrfs_header_chunk_tree_uuid(right),
 
        u8 fsid[BTRFS_UUID_SIZE];
        int ret = 1;
 
-       read_extent_buffer(eb, fsid, btrfs_header_fsid(eb), BTRFS_FSID_SIZE);
+       read_extent_buffer(eb, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE);
        while (fs_devices) {
                if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) {
                        ret = 0;
        btrfs_set_header_owner(leaf, objectid);
        root->node = leaf;
 
-       write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(leaf),
+       write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(),
                            BTRFS_FSID_SIZE);
        write_extent_buffer(leaf, fs_info->chunk_tree_uuid,
                            btrfs_header_chunk_tree_uuid(leaf),
        root->node = leaf;
 
        write_extent_buffer(root->node, root->fs_info->fsid,
-                           btrfs_header_fsid(root->node), BTRFS_FSID_SIZE);
+                           btrfs_header_fsid(), BTRFS_FSID_SIZE);
        btrfs_mark_buffer_dirty(root->node);
        btrfs_tree_unlock(root->node);
        return root;
 
        btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV);
        btrfs_set_header_owner(leaf, objectid);
 
-       write_extent_buffer(leaf, root->fs_info->fsid, btrfs_header_fsid(leaf),
+       write_extent_buffer(leaf, root->fs_info->fsid, btrfs_header_fsid(),
                            BTRFS_FSID_SIZE);
        write_extent_buffer(leaf, root->fs_info->chunk_tree_uuid,
                            btrfs_header_chunk_tree_uuid(leaf),