Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755620Ab2ETNZM (ORCPT ); Sun, 20 May 2012 09:25:12 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:50441 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755061Ab2ETNYF (ORCPT ); Sun, 20 May 2012 09:24:05 -0400 From: Akinobu Mita To: linux-kernel@vger.kernel.org, akpm@linux-foundation.org Cc: Akinobu Mita , Laurent Pinchart , linux-media@vger.kernel.org Subject: [PATCH 06/10] video/uvc: use memweight() Date: Sun, 20 May 2012 22:23:19 +0900 Message-Id: <1337520203-29147-6-git-send-email-akinobu.mita@gmail.com> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: <1337520203-29147-1-git-send-email-akinobu.mita@gmail.com> References: <1337520203-29147-1-git-send-email-akinobu.mita@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1514 Lines: 40 Use memweight() to count the total number of bits set in memory area. Signed-off-by: Akinobu Mita Cc: Laurent Pinchart Cc: linux-media@vger.kernel.org --- 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 0efd3b1..8683be0 100644 --- a/drivers/media/video/uvc/uvc_ctrl.c +++ b/drivers/media/video/uvc/uvc_ctrl.c @@ -1851,7 +1851,7 @@ 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) { @@ -1869,8 +1869,7 @@ 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; -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/