From: Jean Delvare <khali@linux-fr.org>
To: LMML <linux-media@vger.kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Guenter Roeck <linux@roeck-us.net>,
Mauro Carvalho Chehab <mchehab@infradead.org>
Subject: [PATCH] [media] mceusb: Optimize DIV_ROUND_CLOSEST call
Date: Sat, 1 Sep 2012 20:53:57 +0200 [thread overview]
Message-ID: <20120901205357.1a75d8a1@endymion.delvare> (raw)
DIV_ROUND_CLOSEST is faster if the compiler knows it will only be
dealing with unsigned dividends.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
---
drivers/media/rc/mceusb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-3.6-rc3.orig/drivers/media/rc/mceusb.c 2012-08-04 21:49:27.000000000 +0200
+++ linux-3.6-rc3/drivers/media/rc/mceusb.c 2012-09-01 18:53:32.053042123 +0200
@@ -627,7 +627,7 @@ static void mceusb_dev_printdata(struct
break;
case MCE_RSP_EQIRCFS:
period = DIV_ROUND_CLOSEST(
- (1 << data1 * 2) * (data2 + 1), 10);
+ (1U << data1 * 2) * (data2 + 1), 10);
if (!period)
break;
carrier = (1000 * 1000) / period;
--
Jean Delvare
next reply other threads:[~2012-09-01 18:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-01 18:53 Jean Delvare [this message]
2012-09-02 4:54 ` [PATCH] [media] mceusb: Optimize DIV_ROUND_CLOSEST call Guenter Roeck
2012-09-18 15:49 ` Mauro Carvalho Chehab
2012-09-18 16:24 ` Guenter Roeck
2012-09-18 18:35 ` Jean Delvare
2012-09-19 3:46 ` Guenter Roeck
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