On Fri, Oct 2, 2020 at 7:53 PM Daniel Vetter <daniel.vetter@xxxxxxxx> wrote:
>
> FOLL_WRITE | FOLL_FORCE is really the only reasonable thing to do for
> simple dma device that can't guarantee write protection. Which is also
> what all the callers are using.
>
> So just simplify this.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> Cc: Inki Dae <inki.dae@xxxxxxxxxxx>
> Cc: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
> Cc: Seung-Woo Kim <sw0312.kim@xxxxxxxxxxx>
> Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> Cc: Kukjin Kim <kgene@xxxxxxxxxx>
> Cc: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
> Cc: Pawel Osciak <pawel@xxxxxxxxxx>
> Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> Cc: Tomasz Figa <tfiga@xxxxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Oded Gabbay <oded.gabbay@xxxxxxxxx>
> Cc: Omer Shpigelman <oshpigelman@xxxxxxxxx>
> Cc: Tomer Tayar <ttayar@xxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: Pawel Piskorski <ppiskorski@xxxxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: linux-samsung-soc@xxxxxxxxxxxxxxx
> Cc: linux-media@xxxxxxxxxxxxxxx
> Cc: linux-mm@xxxxxxxxx
> ---
> drivers/gpu/drm/exynos/exynos_drm_g2d.c | 3 +--
> drivers/media/common/videobuf2/videobuf2-memops.c | 3 +--
> drivers/misc/habanalabs/common/memory.c | 3 +--
> include/linux/mm.h | 2 +-
> mm/frame_vector.c | 4 ++--
> 5 files changed, 6 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
> index 967a5cdc120e..ac452842bab3 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
> @@ -480,8 +480,7 @@ static dma_addr_t *g2d_userptr_get_dma_addr(struct g2d_data *g2d,
> goto err_free;
> }
>
> - ret = get_vaddr_frames(start, npages, FOLL_FORCE | FOLL_WRITE,
> - g2d_userptr->vec);
> + ret = get_vaddr_frames(start, npages, g2d_userptr->vec);
> if (ret != npages) {
> DRM_DEV_ERROR(g2d->dev,
> "failed to get user pages from userptr.\n");
> diff --git a/drivers/media/common/videobuf2/videobuf2-memops.c b/drivers/media/common/videobuf2/videobuf2-memops.c
> index 6e9e05153f4e..9dd6c27162f4 100644
> --- a/drivers/media/common/videobuf2/videobuf2-memops.c
> +++ b/drivers/media/common/videobuf2/videobuf2-memops.c
> @@ -40,7 +40,6 @@ struct frame_vector *vb2_create_framevec(unsigned long start,
> unsigned long first, last;
> unsigned long nr;
> struct frame_vector *vec;
> - unsigned int flags = FOLL_FORCE | FOLL_WRITE;
>
> first = start >> PAGE_SHIFT;
> last = (start + length - 1) >> PAGE_SHIFT;
> @@ -48,7 +47,7 @@ struct frame_vector *vb2_create_framevec(unsigned long start,
> vec = frame_vector_create(nr);
> if (!vec)
> return ERR_PTR(-ENOMEM);
> - ret = get_vaddr_frames(start & PAGE_MASK, nr, flags, vec);
> + ret = get_vaddr_frames(start & PAGE_MASK, nr, vec);
> if (ret < 0)
> goto out_destroy;
> /* We accept only complete set of PFNs */
For drivers/media/common/videobuf2/:
Acked-by: Tomasz Figa <tfiga@xxxxxxxxxxxx>
Best regards,
Tomasz
