Em 08-06-2012 21:50, Akinobu Mita escreveu:
> Use memweight() to count the total number of bits set in memory area.
>
> Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
> Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Cc: linux-media@xxxxxxxxxxxxxxx
Acked-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
> ---
> No changes from v1
>
> drivers/media/video/uvc/uvc_ctrl.c | 5 ++---
> 1 files changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c
> index af26bbe..f7061a5 100644
> --- a/drivers/media/video/uvc/uvc_ctrl.c
> +++ b/drivers/media/video/uvc/uvc_ctrl.c
> @@ -2083,7 +2083,7 @@ int uvc_ctrl_init_device(struct uvc_device *dev)
> /* Walk the entities list and instantiate controls */
> list_for_each_entry(entity, &dev->entities, list) {
> struct uvc_control *ctrl;
> - unsigned int bControlSize = 0, ncontrols = 0;
> + unsigned int bControlSize = 0, ncontrols;
> __u8 *bmControls = NULL;
>
> if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) {
> @@ -2101,8 +2101,7 @@ int uvc_ctrl_init_device(struct uvc_device *dev)
> uvc_ctrl_prune_entity(dev, entity);
>
> /* Count supported controls and allocate the controls array */
> - for (i = 0; i < bControlSize; ++i)
> - ncontrols += hweight8(bmControls[i]);
> + ncontrols = memweight(bmControls, bControlSize);
> if (ncontrols == 0)
> continue;
>
>
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