[PATCH 05/26] omap3isp: Make isp_video_buffer_prepare_user() use get_user_pages_fast()

Jan Kara
2013-10-02T14:28:57Z

CC: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
CC: linux-media@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
---
drivers/media/platform/omap3isp/ispqueue.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/omap3isp/ispqueue.c b/drivers/media/platform/omap3isp/ispqueue.c
index e15f01342058..bed380395e6c 100644
--- a/drivers/media/platform/omap3isp/ispqueue.c
+++ b/drivers/media/platform/omap3isp/ispqueue.c
@@ -331,13 +331,9 @@ static int isp_video_buffer_prepare_user(struct isp_video_buffer *buf)
if (buf->pages == NULL)
return -ENOMEM;

- down_read(&current->mm->mmap_sem);
- ret = get_user_pages(current, current->mm, data & PAGE_MASK,
- buf->npages,
- buf->vbuf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE, 0,
- buf->pages, NULL);
- up_read(&current->mm->mmap_sem);
-
+ ret = get_user_pages_fast(data & PAGE_MASK, buf->npages,
+ buf->vbuf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ buf->pages);
if (ret != buf->npages) {
buf->npages = ret < 0 ? 0 : ret;
isp_video_buffer_cleanup(buf);
--
1.8.1.4