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

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Message-ID: <859186.1674569545@warthog.procyon.org.uk>
Date:   Tue, 24 Jan 2023 14:12:25 +0000
From:   David Howells <dhowells@...hat.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     dhowells@...hat.com, Jason Gunthorpe <jgg@...dia.com>,
        John Hubbard <jhubbard@...dia.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        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

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

> On Tue, Jan 24, 2023 at 01:57:08PM +0000, David Howells wrote:
> > 	[include/linux/mm_types.h]
> > 	#define PAGE_CLEANUP_UNPIN	(1U << 0)
> > 	#define PAGE_CLEANUP_PUT	(1U << 0)
> 
> With the latest series we don't need PAGE_CLEANUP_PUT at all.

We will when it comes to skbuffs.

David