On Thu, Jun 29, 2023 at 04:54:31PM +0100, David Howells wrote: ... > static int iter_to_pipe(struct iov_iter *from, > struct pipe_inode_info *pipe, > unsigned flags) > { > - struct pipe_buffer buf = { > - .ops = &user_page_pipe_buf_ops, Hi David, perhaps this patchset will change somewhat based on discussion elsewhere in this thread. But, on a more mundane level, GCC reports that user_page_pipe_buf_ops is (now) unused. I guess this was the last user, and user_page_pipe_buf_ops can be removed as part of this patch. ...