linux-kernel - [RFC PATCH 5/7] NFS: direct-io: convert to FOLL

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Message-ID: <20220225085025.3052894-6-jhubbard@nvidia.com>
Date:   Fri, 25 Feb 2022 00:50:23 -0800
From:   John Hubbard <jhubbard@...dia.com>
To:     Jens Axboe <axboe@...nel.dk>, Jan Kara <jack@...e.cz>,
        Christoph Hellwig <hch@...radead.org>,
        Dave Chinner <dchinner@...hat.com>,
        "Darrick J . Wong" <djwong@...nel.org>,
        Theodore Ts'o <tytso@....edu>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Miklos Szeredi <miklos@...redi.hu>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Chaitanya Kulkarni <kch@...dia.com>
CC:     <linux-block@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>,
        <linux-xfs@...r.kernel.org>, <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        John Hubbard <jhubbard@...dia.com>
Subject: [RFC PATCH 5/7] NFS: direct-io: convert to FOLL_PIN pages

Now that Direct IO's core allocators invoke pin_user_pages_fast(), those
pages must free released via unpin_user_page(), instead of put_page().

Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 fs/nfs/direct.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index eabfdab543c8..2e0d399c5a5a 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -181,7 +181,7 @@ static void nfs_direct_release_pages(struct page **pages, unsigned int npages)
 {
 	unsigned int i;
 	for (i = 0; i < npages; i++)
-		put_page(pages[i]);
+		dio_w_unpin_user_page(pages[i]);
 }
 
 void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
-- 
2.35.1