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    Subject[PATCH v3 11/41] media/v4l2-core/mm: convert put_page() to put_user_page*()
    Date
    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").

    Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
    Cc: Kees Cook <keescook@chromium.org>
    Cc: Hans Verkuil <hans.verkuil@cisco.com>
    Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
    Cc: Jan Kara <jack@suse.cz>
    Cc: Robin Murphy <robin.murphy@arm.com>
    Cc: Souptick Joarder <jrdr.linux@gmail.com>
    Cc: Dan Williams <dan.j.williams@intel.com>
    Cc: linux-media@vger.kernel.org
    Signed-off-by: John Hubbard <jhubbard@nvidia.com>
    ---
    drivers/media/v4l2-core/videobuf-dma-sg.c | 3 +--
    1 file changed, 1 insertion(+), 2 deletions(-)

    diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c b/drivers/media/v4l2-core/videobuf-dma-sg.c
    index 66a6c6c236a7..d6eeb437ec19 100644
    --- a/drivers/media/v4l2-core/videobuf-dma-sg.c
    +++ b/drivers/media/v4l2-core/videobuf-dma-sg.c
    @@ -349,8 +349,7 @@ int videobuf_dma_free(struct videobuf_dmabuf *dma)
    BUG_ON(dma->sglen);

    if (dma->pages) {
    - for (i = 0; i < dma->nr_pages; i++)
    - put_page(dma->pages[i]);
    + put_user_pages(dma->pages, dma->nr_pages);
    kfree(dma->pages);
    dma->pages = NULL;
    }
    --
    2.22.0
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