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Date:   Tue, 2 Jun 2020 22:58:27 +0100
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     David Laight <David.Laight@aculab.com>
Cc:     "'Michael S. Tsirkin'" <mst@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Jason Wang <jasowang@redhat.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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Subject: Re: [PATCH RFC] uaccess: user_access_begin_after_access_ok()
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On Tue, Jun 02, 2020 at 08:41:38PM +0000, David Laight wrote:

> In which case you need a 'user_access_begin' that takes the mm
> as an additional parameter.

	What does any of that have to do with mm?  Details, please.