linux-kernel - Re: [PATCH v8 10/10] mm: Renumber FOLL_PIN and FOLL

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Date:   Tue, 24 Jan 2023 09:47:50 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     David Howells <dhowells@...hat.com>
Cc:     John Hubbard <jhubbard@...dia.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@...radead.org>,
        Matthew Wilcox <willy@...radead.org>,
        Jens Axboe <axboe@...nel.dk>, Jan Kara <jack@...e.cz>,
        Jeff Layton <jlayton@...nel.org>,
        Logan Gunthorpe <logang@...tatee.com>,
        linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
        linux-mm@...ck.org
Subject: Re: [PATCH v8 10/10] mm: Renumber FOLL_PIN and FOLL_GET down

On Tue, Jan 24, 2023 at 01:46:23PM +0000, David Howells wrote:
> Jason Gunthorpe <jgg@...dia.com> wrote:
> 
> > Yeah, I already wrote a similar patch, using the 1<< notation, 
> > splitting the internal/external, and rebasing on the move to
> > mm_types.. I can certainly drop that patch if we'd rather do this.
> 
> Note that I've already given Andrew a patch to move FOLL_* to mm_types.h.
> 
> I'm happy to go with your patch on top of that if you can just renumber
> FOLL_PIN to 0 and FOLL_GET to 1.

I moved FOLL_PIN to internal.h because it is not supposed to be used
outside mm/*

I would prefer to keep it that way.

Jason