From 4593016801ca0951c6e2040eccfb93df107d5968 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Sat, 21 Jul 2012 10:54:52 +1000 Subject: [PATCH] video/uvc: use memweight() Use memweight() to count the total number of bits set in memory area. Signed-off-by: Akinobu Mita Acked-by: Laurent Pinchart Acked-by: Mauro Carvalho Chehab Signed-off-by: Andrew Morton --- drivers/media/video/uvc/uvc_ctrl.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c index af26bbe6f76e..f7061a5ef1d2 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; -- 2.39.2