Re: [PATCH 07/11] pipe: remove generic_pipe_buf_confirm()

[Christoph Hellwig]

>  static inline int pipe_buf_confirm(struct pipe_inode_info *pipe,
>                                  struct pipe_buffer *buf)
>  {
> -     return buf->ops->confirm(pipe, buf);
> +     return 0;
>  }

Why do you keep pipe_buf_confirm around?