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authorJulia Lawall <julia@diku.dk>2008-08-20 20:44:53 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-10-12 09:36:51 -0200
commite9e24cee67bf71b929b646387f286e907cbde5fc (patch)
treefd3be5482d9a17cd5df69ca8e0cd0ba5c0d4cb5c
parent95908ece60443ceb188fccf021d62823de8e6f0c (diff)
V4L/DVB (8729): Use DIV_ROUND_UP
The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) / (d)) but is perhaps more readable. An extract of the semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @haskernel@ @@ @depends on haskernel@ expression n,d; @@ ( - (n + d - 1) / d + DIV_ROUND_UP(n,d) | - (n + (d - 1)) / d + DIV_ROUND_UP(n,d) ) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP((n),d) + DIV_ROUND_UP(n,d) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP(n,(d)) + DIV_ROUND_UP(n,d) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--drivers/media/video/bw-qcam.c4
-rw-r--r--drivers/media/video/uvc/uvc_video.c2
-rw-r--r--drivers/media/video/zoran_device.c4
3 files changed, 5 insertions, 5 deletions
diff --git a/drivers/media/video/bw-qcam.c b/drivers/media/video/bw-qcam.c
index 6e39e25..01f0770 100644
--- a/drivers/media/video/bw-qcam.c
+++ b/drivers/media/video/bw-qcam.c
@@ -495,7 +495,7 @@ static void qc_set(struct qcam_device *q)
val2 = (((q->port_mode & QC_MODE_MASK) == QC_BIDIR) ? 24 : 8) *
q->transfer_scale;
}
- val = (val + val2 - 1) / val2;
+ val = DIV_ROUND_UP(val, val2);
qc_command(q, 0x13);
qc_command(q, val);
@@ -651,7 +651,7 @@ static long qc_capture(struct qcam_device * q, char __user *buf, unsigned long l
transperline = q->width * q->bpp;
divisor = (((q->port_mode & QC_MODE_MASK) == QC_BIDIR) ? 24 : 8) *
q->transfer_scale;
- transperline = (transperline + divisor - 1) / divisor;
+ transperline = DIV_ROUND_UP(transperline, divisor);
for (i = 0, yield = yieldlines; i < linestotrans; i++)
{
diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c
index 6854ac7..03dc3a5 100644
--- a/drivers/media/video/uvc/uvc_video.c
+++ b/drivers/media/video/uvc/uvc_video.c
@@ -655,7 +655,7 @@ static int uvc_init_video_isoc(struct uvc_video_device *video,
if (size > UVC_MAX_FRAME_SIZE)
return -EINVAL;
- npackets = (size + psize - 1) / psize;
+ npackets = DIV_ROUND_UP(size, psize);
if (npackets > UVC_MAX_ISO_PACKETS)
npackets = UVC_MAX_ISO_PACKETS;
diff --git a/drivers/media/video/zoran_device.c b/drivers/media/video/zoran_device.c
index 88d3697..2b3ca14 100644
--- a/drivers/media/video/zoran_device.c
+++ b/drivers/media/video/zoran_device.c
@@ -377,7 +377,7 @@ zr36057_set_vfe (struct zoran *zr,
/* horizontal */
VidWinWid = video_width;
- X = (VidWinWid * 64 + tvn->Wa - 1) / tvn->Wa;
+ X = DIV_ROUND_UP(VidWinWid * 64, tvn->Wa);
We = (VidWinWid * 64) / X;
HorDcm = 64 - X;
hcrop1 = 2 * ((tvn->Wa - We) / 4);
@@ -403,7 +403,7 @@ zr36057_set_vfe (struct zoran *zr,
/* Vertical */
DispMode = !(video_height > BUZ_MAX_HEIGHT / 2);
VidWinHt = DispMode ? video_height : video_height / 2;
- Y = (VidWinHt * 64 * 2 + tvn->Ha - 1) / tvn->Ha;
+ Y = DIV_ROUND_UP(VidWinHt * 64 * 2, tvn->Ha);
He = (VidWinHt * 64) / Y;
VerDcm = 64 - Y;
vcrop1 = (tvn->Ha / 2 - He) / 2;