Nov 30 2009

arch/alpha/kernel/sys_ruffian.c: Use DIV_ROUND_CLOSEST 

Author: Julia Lawall <julia@diku.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/)

// 
@haskernel@
@@

@depends on haskernel@
expression x,__divisor;
@@

- (((x) + ((__divisor) / 2)) / (__divisor))
+ DIV_ROUND_CLOSEST(x,__divisor)
// 

Signed-off-by: Julia Lawall 
Cc: Ivan Kokshaysky 
Cc: Richard Henderson 
Signed-off-by: Matt Turner 

---
 arch/alpha/kernel/sys_ruffian.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 
diff --git a/arch/alpha/kernel/sys_ruffian.c b/arch/alpha/kernel/sys_ruffian.c
index d9f9cfe..8de1046 100644
--- a/arch/alpha/kernel/sys_ruffian.c
+++ b/arch/alpha/kernel/sys_ruffian.c
@@ -66,7 +66,7 @@ ruffian_init_irq(void)
 	common_init_isa_dma();
 }
 
-#define RUFFIAN_LATCH	((PIT_TICK_RATE + HZ / 2) / HZ)
+#define RUFFIAN_LATCH	DIV_ROUND_CLOSEST(PIT_TICK_RATE, HZ)
 
 static void __init
 ruffian_init_rtc(void)

qlambert