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From:   John Hubbard <jhubbard@nvidia.com>
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Subject: [PATCH v2 10/18] fs/io_uring: set FOLL_PIN via pin_user_pages()
Date:   Sun, 3 Nov 2019 13:18:05 -0800
Message-ID: <20191103211813.213227-11-jhubbard@nvidia.com>
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Convert fs/io_uring to use the new pin_user_pages() call, which sets
FOLL_PIN. Setting FOLL_PIN is now required for code that requires
tracking of pinned pages, and therefore for any code that calls
put_user_page().

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 fs/io_uring.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index f9a38998f2fc..0f307f2c7cac 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3433,9 +3433,8 @@ static int io_sqe_buffer_register(struct io_ring_ctx =
*ctx, void __user *arg,
=20
 		ret =3D 0;
 		down_read(&current->mm->mmap_sem);
-		pret =3D get_user_pages(ubuf, nr_pages,
-				      FOLL_WRITE | FOLL_LONGTERM,
-				      pages, vmas);
+		pret =3D pin_longterm_pages(ubuf, nr_pages, FOLL_WRITE, pages,
+					  vmas);
 		if (pret =3D=3D nr_pages) {
 			/* don't support file backed memory */
 			for (j =3D 0; j < nr_pages; j++) {
--=20
2.23.0