diff options
| author | Julia Lawall <julia@diku.dk> | 2009-08-01 23:48:41 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-12 19:19:08 +0400 |
| commit | 75b697f747b14b0c6afae48ee0f5e605abd2df4c (patch) | |
| tree | 3812e853ff3d8758cded2fdfebb58bdec76babfc /drivers/media/dvb/frontends/stb6100.c | |
| parent | 166987c6987a25a95cef6889d24088f0eb2daa36 (diff) | |
| download | linux-75b697f747b14b0c6afae48ee0f5e605abd2df4c.tar.xz | |
V4L/DVB (12483): Use DIV_ROUND_CLOSEST
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@
@@
@depends on haskernel@
expression x,__divisor;
@@
- (((x) + ((__divisor) / 2)) / (__divisor))
+ DIV_ROUND_CLOSEST(x,__divisor)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb/frontends/stb6100.c')
| -rw-r--r-- | drivers/media/dvb/frontends/stb6100.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/media/dvb/frontends/stb6100.c b/drivers/media/dvb/frontends/stb6100.c index 1ed5a7db4c5e..60ee18a94f43 100644 --- a/drivers/media/dvb/frontends/stb6100.c +++ b/drivers/media/dvb/frontends/stb6100.c @@ -367,7 +367,9 @@ static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency) /* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1))) */ nint = fvco / (state->reference << psd2); /* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9 */ - nfrac = (((fvco - (nint * state->reference << psd2)) << (9 - psd2)) + state->reference / 2) / state->reference; + nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2)) + << (9 - psd2), + state->reference); dprintk(verbose, FE_DEBUG, 1, "frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u", frequency, srate, (unsigned int)g, (unsigned int)odiv, |