linux-kernel - Re: [RFC PATCH 2/4] iov_iter: Add a function to extract a page list from an iterator

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Date:   Tue, 22 Nov 2022 13:36:57 +0000
From:   David Howells <dhowells@...hat.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     dhowells@...hat.com, Al Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@....de>,
        John Hubbard <jhubbard@...dia.com>,
        Matthew Wilcox <willy@...radead.org>,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        Jeff Layton <jlayton@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 2/4] iov_iter: Add a function to extract a page list from an iterator

Christoph Hellwig <hch@...radead.org> wrote:

> > +EXPORT_SYMBOL(iov_iter_extract_pages);
> 
> get_user_pages_fast, pin_user_pages_fast are very intentionally
> EXPORT_SYMBOL_GPL, which should not be bypassed by an iov_* wrapper.

Ah, but I'm intending to replace:

	EXPORT_SYMBOL(iov_iter_get_pages2);
	EXPORT_SYMBOL(iov_iter_get_pages_alloc2);

which *aren't* marked _GPL, so you need to argue that one with Al.

David