If val is a u64, then following:
val *= (u64)1 << 32;
val /= (u64)1 << 32;
should surely be better represented as:
val <<= 32;
val >>= 32;
Especially as, for the division, the compiler might want to actually do a
division:
drivers/built-in.o: In function `lgs8gxx_get_afc_phase':
drivers/media/dvb/frontends/lgs8gxx.c:250: undefined reference to `__udivdi3'
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---
drivers/media/dvb/frontends/lgs8gxx.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/media/dvb/frontends/lgs8gxx.c b/drivers/media/dvb/frontends/lgs8gxx.c
index eabcadc..dee5396 100644
--- a/drivers/media/dvb/frontends/lgs8gxx.c
+++ b/drivers/media/dvb/frontends/lgs8gxx.c
@@ -199,7 +199,7 @@ static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/)
val = freq;
if (freq != 0) {
- val *= (u64)1 << 32;
+ val <<= 32;
if (if_clk != 0)
do_div(val, if_clk);
v32 = val & 0xFFFFFFFF;
@@ -246,7 +246,7 @@ static int lgs8gxx_get_afc_phase(struct lgs8gxx_state *priv)
val = v32;
val *= priv->config->if_clk_freq;
- val /= (u64)1 << 32;
+ val >>= 32;
dprintk("AFC = %u kHz\n", (u32)val);
return 0;
}
--
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