Date:   Mon, 13 Dec 2021 08:57:25 +0100
From:   Christoph Hellwig <hch@lst.de>
To:     "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc:     Baoquan He <bhe@redhat.com>, Vivek Goyal <vgoyal@redhat.com>,
        Dave Young <dyoung@redhat.com>, kexec@lists.infradead.org,
        Tiezhu Yang <yangtiezhu@loongson.cn>,
        linux-kernel@vger.kernel.org,
        Amit Daniel Kachhap <amit.kachhap@arm.com>,
        Christoph Hellwig <hch@lst.de>, linux-s390@vger.kernel.org,
        linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 1/3] vmcore: Convert copy_oldmem_page() to take an
 iov_iter
Message-ID: <20211213075725.GA20986@lst.de>
References: <20211213000636.2932569-1-willy@infradead.org> <20211213000636.2932569-2-willy@infradead.org>
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On Mon, Dec 13, 2021 at 12:06:34AM +0000, Matthew Wilcox (Oracle) wrote:
> Instead of passing in a 'buf' and 'userbuf' argument, pass in an iov_iter.
> s390 needs more work to pass the iov_iter down further, or refactor,
> but I'd be more comfortable if someone who can test on s390 did that work.
> 
> It's more convenient to convert the whole of read_from_oldmem() to
> take an iov_iter at the same time, so rename it to read_from_oldmem_iter()
> and add a temporary read_from_oldmem() wrapper that creates an iov_iter.

This looks pretty reasonable.  s390 could use some love from people that
know the code, and yes, the kerneldoc comments should go away.