linux-kernel - Re: [RFC PATCH 2/4] splice: Make vmsplice() steal or copy

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Message-ID: <ZJ7cQ8Wdiyb0Ax/r@corigine.com>
Date:   Fri, 30 Jun 2023 15:44:35 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     David Howells <dhowells@...hat.com>
Cc:     netdev@...r.kernel.org, Matthew Wilcox <willy@...radead.org>,
        Dave Chinner <david@...morbit.com>,
        Matt Whitlock <kernel@...twhitlock.name>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jens Axboe <axboe@...nel.dk>, linux-fsdevel@...ck.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Christoph Hellwig <hch@....de>, linux-fsdevel@...r.kernel.org
Subject: Re: [RFC PATCH 2/4] splice: Make vmsplice() steal or copy

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.

...