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Date:   Thu, 3 Sep 2020 19:39:50 +0100
From:   Matthew Wilcox <willy@infradead.org>
To:     Souptick Joarder <jrdr.linux@gmail.com>
Cc:     John Hubbard <jhubbard@nvidia.com>,
        Barry Song <song.bao.hua@hisilicon.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linux-MM <linux-mm@kvack.org>, linux-kernel@vger.kernel.org,
        linuxarm@huawei.com, Jan Kara <jack@suse.cz>,
        =?iso-8859-1?B?Suly9G1l?= Glisse <jglisse@redhat.com>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Christoph Hellwig <hch@infradead.org>,
        Dan Williams <dan.j.williams@intel.com>,
        Dave Chinner <david@fromorbit.com>,
        Jason Gunthorpe <jgg@ziepe.ca>,
        Jonathan Corbet <corbet@lwn.net>,
        Michal Hocko <mhocko@suse.com>,
        Mike Kravetz <mike.kravetz@oracle.com>,
        Shuah Khan <shuah@kernel.org>, Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [PATCH] mm/gup: don't permit users to call get_user_pages with
 FOLL_LONGTERM
Message-ID: <20200903183950.GF14765@casper.infradead.org>
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 <e4265ac0-793d-053b-81b1-15e57c04b830@nvidia.com>
 <CAFqt6zb2GjO9KOVdKT1P0P-Wn+isnArous5gpw-AJ3va+fi9rw@mail.gmail.com>
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On Thu, Sep 03, 2020 at 12:42:44PM +0530, Souptick Joarder wrote:
> We can use is_valid_gup_flags() inside ->
> get_user_pages_locked(),
> get_user_pages_unlocked(),
> pin_user_pages_locked() as well.
> 
> Are you planning to add it in future patches ?

If you're looking for a new project, adding a foll_t or gup_t or
something for the FOLL flags (like we have for gfp_t or vm_fault_t)
would be helpful.  We're inconsistent with our naming here.