alloc_test_extent_buffer
return alloc_test_extent_buffer(fs_info, bytenr);
struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info,
root->node = alloc_test_extent_buffer(root->fs_info, nodesize);
root->node = alloc_test_extent_buffer(root->fs_info, nodesize);
root->node = alloc_test_extent_buffer(root->fs_info, nodesize);