linux-kernel - [PATCH 4/15] arch/arm/mach-ep93xx: Use DIV_ROUND

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Message-ID: <Pine.LNX.4.64.0908021045190.15557@ask.diku.dk>
Date:	Sun, 2 Aug 2009 10:45:39 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	hsweeten@...ionengravers.com, ryan@...ewatersys.com,
	linux-arm-kernel@...ts.arm.linux.org.uk,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 4/15] arch/arm/mach-ep93xx: Use DIV_ROUND_CLOSEST

From: Julia Lawall <julia@...u.dk>

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 <julia@...u.dk>

---
 arch/arm/mach-ep93xx/core.c         |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 4075529..16b92c3 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -82,7 +82,7 @@ void __init ep93xx_map_io(void)
  */
 static unsigned int last_jiffy_time;
 
-#define TIMER4_TICKS_PER_JIFFY		((CLOCK_TICK_RATE + (HZ/2)) / HZ)
+#define TIMER4_TICKS_PER_JIFFY		DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
 
 static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
 {
--
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