AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

arch/m32r: Use DIV_ROUND_CLOSEST

Browse Source 
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: Hirokazu Takata <takata@linux-m32r.org>
This commit is contained in:
Julia Lawall 2009-08-02 10:47:27 +02:00 committed by Hirokazu Takata
parent b419148e56
commit 560235857f
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/m32r/kernel/time.c
View File

@ -75,7 +75,7 @@ u32 arch_gettimeoffset(void)
count = 0;
count = (latch - count) * TICK_SIZE;
elapsed_time = (count + latch / 2) / latch;
elapsed_time = DIV_ROUND_CLOSEST(count, latch);
/* NOTE: LATCH is equal to the "interval" value (= reload count). */
#else /* CONFIG_SMP */
@ -93,7 +93,7 @@ u32 arch_gettimeoffset(void)
p_count = count;
count = (latch - count) * TICK_SIZE;
elapsed_time = (count + latch / 2) / latch;
elapsed_time = DIV_ROUND_CLOSEST(count, latch);
/* NOTE: LATCH is equal to the "interval" value (= reload count). */
#endif /* CONFIG_SMP */
#elif defined(CONFIG_CHIP_M32310)
@ -211,7 +211,7 @@ void __init time_init(void)
bus_clock = boot_cpu_data.bus_clock;
divide = boot_cpu_data.timer_divide;
latch = (bus_clock/divide + HZ / 2) / HZ;
latch = DIV_ROUND_CLOSEST(bus_clock/divide, HZ);
printk("Timer start : latch = %ld\n", latch);