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.vet...@ffwll.ch>
Reviewed-by: Jérôme Glisse <jgli...@redhat.com>
Reviewed-by: Ira Weiny <ira.we...@intel.com>
Signed-off-by: John Hubbard <jhubb...@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_dmablit.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 = vzalloc(array_size(sizeof(struct page *), vsg->num_pages));
        if (NULL == vsg->pages)
                return -ENOMEM;
-       ret = get_user_pages_fast((unsigned long)xfer->mem_addr,
+       ret = pin_user_pages_fast((unsigned long)xfer->mem_addr,
                        vsg->num_pages,
                        vsg->direction == DMA_FROM_DEVICE ? FOLL_WRITE : 0,
                        vsg->pages);
-- 
2.24.0

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