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Miller" , Mike Kravetz Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 1. Change v4l2 from get_user_pages(FOLL_LONGTERM), to pin_longterm_pages(), which sets both FOLL_LONGTERM and FOLL_PIN. 2. Because all FOLL_PIN-acquired pages must be released via put_user_page(), also convert the put_page() call over to put_user_pages_dirty_lock(). Cc: Mauro Carvalho Chehab Signed-off-by: John Hubbard --- drivers/media/v4l2-core/videobuf-dma-sg.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c b/drivers/media/v4l2= -core/videobuf-dma-sg.c index 28262190c3ab..9b9c5b37bf59 100644 --- a/drivers/media/v4l2-core/videobuf-dma-sg.c +++ b/drivers/media/v4l2-core/videobuf-dma-sg.c @@ -183,12 +183,12 @@ static int videobuf_dma_init_user_locked(struct video= buf_dmabuf *dma, dprintk(1, "init user [0x%lx+0x%lx =3D> %d pages]\n", data, size, dma->nr_pages); =20 - err =3D get_user_pages(data & PAGE_MASK, dma->nr_pages, - flags | FOLL_LONGTERM, dma->pages, NULL); + err =3D pin_longterm_pages(data & PAGE_MASK, dma->nr_pages, + flags, dma->pages, NULL); =20 if (err !=3D dma->nr_pages) { dma->nr_pages =3D (err >=3D 0) ? err : 0; - dprintk(1, "get_user_pages: err=3D%d [%d]\n", err, + dprintk(1, "pin_longterm_pages: err=3D%d [%d]\n", err, dma->nr_pages); return err < 0 ? err : -EINVAL; } @@ -349,11 +349,8 @@ int videobuf_dma_free(struct videobuf_dmabuf *dma) BUG_ON(dma->sglen); =20 if (dma->pages) { - for (i =3D 0; i < dma->nr_pages; i++) { - if (dma->direction =3D=3D DMA_FROM_DEVICE) - set_page_dirty_lock(dma->pages[i]); - put_page(dma->pages[i]); - } + put_user_pages_dirty_lock(dma->pages, dma->nr_pages, + dma->direction =3D=3D DMA_FROM_DEVICE); kfree(dma->pages); dma->pages =3D NULL; } --=20 2.23.0