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From:   john.hubbard@gmail.com
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Subject: [PATCH v3 33/41] fs/nfs: convert put_page() to put_user_page*()
Date:   Tue,  6 Aug 2019 18:33:32 -0700
Message-Id: <20190807013340.9706-34-jhubbard@nvidia.com>
In-Reply-To: <20190807013340.9706-1-jhubbard@nvidia.com>
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From: John Hubbard <jhubbard@nvidia.com>

For pages that were retained via get_user_pages*(), release those pages
via the new put_user_page*() routines, instead of via put_page() or
release_pages().

This is part a tree-wide conversion, as described in commit fc1d8e7cca2d
("mm: introduce put_user_page*(), placeholder versions").

Reviewed-by: Calum Mackay <calum.mackay@oracle.com>

Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna.schumaker@netapp.com>
Cc: linux-nfs@vger.kernel.org
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 fs/nfs/direct.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 0cb442406168..c0c1b9f2c069 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -276,13 +276,6 @@ ssize_t nfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 	return nfs_file_direct_write(iocb, iter);
 }
 
-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]);
-}
-
 void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
 			      struct nfs_direct_req *dreq)
 {
@@ -512,7 +505,7 @@ static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq,
 			pos += req_len;
 			dreq->bytes_left -= req_len;
 		}
-		nfs_direct_release_pages(pagevec, npages);
+		put_user_pages(pagevec, npages);
 		kvfree(pagevec);
 		if (result < 0)
 			break;
@@ -935,7 +928,7 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
 			pos += req_len;
 			dreq->bytes_left -= req_len;
 		}
-		nfs_direct_release_pages(pagevec, npages);
+		put_user_pages(pagevec, npages);
 		kvfree(pagevec);
 		if (result < 0)
 			break;
-- 
2.22.0