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From: John Hubbard <jhubbard@nvidia.com>
To: Andrew Morton <akpm@linux-foundation.org>
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Subject: [PATCH v2 11/19] drm/via: set FOLL_PIN via pin_user_pages_fast()
Date: Mon, 25 Nov 2019 15:10:27 -0800
Message-ID: <20191125231035.1539120-12-jhubbard@nvidia.com>
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Convert drm/via to use the new pin_user_pages_fast() 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().

In partial anticipation of this work, the drm/via driver was already
calling put_user_page() instead of put_page(). Therefore, in order to
convert from the get_user_pages()/put_page() model, to the
pin_user_pages()/put_user_page() model, the only change required
is to change get_user_pages() to pin_user_pages().

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: J=C3=A9r=C3=B4me Glisse <jglisse@redhat.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 drivers/gpu/drm/via/via_dmablit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/via/via_dmablit.c b/drivers/gpu/drm/via/via_dm=
ablit.c
index 3db000aacd26..37c5e572993a 100644
--- a/drivers/gpu/drm/via/via_dmablit.c
+++ b/drivers/gpu/drm/via/via_dmablit.c
@@ -239,7 +239,7 @@ via_lock_all_dma_pages(drm_via_sg_info_t *vsg,  drm_via=
_dmablit_t *xfer)
 	vsg->pages =3D vzalloc(array_size(sizeof(struct page *), vsg->num_pages))=
;
 	if (NULL =3D=3D vsg->pages)
 		return -ENOMEM;
-	ret =3D get_user_pages_fast((unsigned long)xfer->mem_addr,
+	ret =3D pin_user_pages_fast((unsigned long)xfer->mem_addr,
 			vsg->num_pages,
 			vsg->direction =3D=3D DMA_FROM_DEVICE ? FOLL_WRITE : 0,
 			vsg->pages);
--=20
2.24.0