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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2012-07-30 14:41:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-30 17:25:16 -0700 |
| commit | 9a601396e8681d9884a9f429cba7ceb2b2a4d21c (patch) | |
| tree | c1903ab7e143f009fbfd22cb071346817348aac1 /drivers | |
| parent | 0121ad62c20ed779e38ad689071da2805f03249f (diff) | |
| download | linux-9a601396e8681d9884a9f429cba7ceb2b2a4d21c.tar.gz linux-9a601396e8681d9884a9f429cba7ceb2b2a4d21c.tar.bz2 linux-9a601396e8681d9884a9f429cba7ceb2b2a4d21c.zip | |
video/uvc: use memweight()
Use memweight() to count the total number of bits set in memory area.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | 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 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; |