linux-kernel - Re: [RFC][PATCHSET] iov

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Message-ID: <YL7/Qv/CBvXIUlKT@infradead.org>
Date:   Tue, 8 Jun 2021 06:25:22 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Al Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@...radead.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        David Sterba <dsterba@...e.com>,
        Miklos Szeredi <miklos@...redi.hu>,
        Anton Altaparmakov <anton@...era.com>,
        David Howells <dhowells@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        Pavel Begunkov <asml.silence@...il.com>
Subject: Re: [RFC][PATCHSET] iov_iter work

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).