From: Julia Lawall <[email protected]> The kernel.h macro DIV_ROUND_CLOSEST performs the computation (x + d/2)/d but is perhaps more readable.
The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @haskernel@ @@ #include <linux/kernel.h> @depends on haskernel@ expression x,__divisor; @@ - (((x) + ((__divisor) / 2)) / (__divisor)) + DIV_ROUND_CLOSEST(x,__divisor) // </smpl> Signed-off-by: Julia Lawall <[email protected]> --- drivers/media/video/uvc/uvc_v4l2.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c index 87cb9cc..6edaaf6 100644 --- a/drivers/media/video/uvc/uvc_v4l2.c +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -95,7 +95,7 @@ static __u32 uvc_try_frame_interval(struct uvc_frame *frame, __u32 interval) const __u32 max = frame->dwFrameInterval[1]; const __u32 step = frame->dwFrameInterval[2]; - interval = min + (interval - min + step/2) / step * step; + interval = min + DIV_ROUND_CLOSEST(interval-min, step) * step; if (interval > max) interval = max; } -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
