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Date:   Tue, 8 Jun 2021 06:25:22 +0100
From:   Christoph Hellwig <hch@infradead.org>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Al Viro <viro@zeniv.linux.org.uk>,
        Christoph Hellwig <hch@infradead.org>,
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        David Howells <dhowells@redhat.com>,
        Matthew Wilcox <willy@infradead.org>,
        Pavel Begunkov <asml.silence@gmail.com>
Subject: Re: [RFC][PATCHSET] iov_iter work
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On Mon, Jun 07, 2021 at 04:35:46PM -0700, Linus Torvalds wrote:
> Thinking more about this thing, I think it means that what we *should*
> do is simply just
> 
>   void iov_iter_init(struct iov_iter *i, unsigned int direction,
>                         const struct iovec *iov, unsigned long nr_segs,
>                         size_t count)
>   {
>         WARN_ON_ONCE(direction & ~(READ | WRITE));
>         iWARN_ON_ONCE(uaccess_kernel());

Yes, exactly! (except for the spurious i above, of course).