linux-kernel - Re: [PATCH v3 06/12] mm/gup: require FOLL_GET for get_user_pages

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Message-ID: <20200203132626.ckkozepykxmqxf6a@box>
Date:   Mon, 3 Feb 2020 16:26:26 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     John Hubbard <jhubbard@...dia.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@...radead.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Chinner <david@...morbit.com>,
        Ira Weiny <ira.weiny@...el.com>, Jan Kara <jack@...e.cz>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Jonathan Corbet <corbet@....net>,
        Jérôme Glisse <jglisse@...hat.com>,
        Michal Hocko <mhocko@...e.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Shuah Khan <shuah@...nel.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Matthew Wilcox <willy@...radead.org>,
        linux-doc@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 06/12] mm/gup: require FOLL_GET for
 get_user_pages_fast()

On Fri, Jan 31, 2020 at 07:40:23PM -0800, John Hubbard wrote:
> Internal to mm/gup.c, require that get_user_pages_fast()
> and __get_user_pages_fast() identify themselves, by setting
> FOLL_GET. This is required in order to be able to make decisions
> based on "FOLL_PIN, or FOLL_GET, or both or neither are set", in
> upcoming patches.
> 
> Signed-off-by: John Hubbard <jhubbard@...dia.com>

Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

-- 
 Kirill A. Shutemov