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[PATCH] blktrace: cleanup using on_each_cpu 

This patch kills a few lines of code in blktrace by making use of
on_each_cpu().

Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
wifi-calibration
Martin Peschke 2006-08-29 19:52:55 +02:00 committed by Jens Axboe
parent cf342e52e3
commit 4090959aee
1 changed files with 4 additions and 15 deletions
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19
block/blktrace.c
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@ -476,6 +476,9 @@ static void blk_check_time(unsigned long long *t)
*t -= (a + b) / 2;
}
/*
* calibrate our inter-CPU timings
*/
static void blk_trace_check_cpu_time(void *data)
{
unsigned long long *t;
@ -493,20 +496,6 @@ static void blk_trace_check_cpu_time(void *data)
put_cpu();
}
/*
* Call blk_trace_check_cpu_time() on each CPU to calibrate our inter-CPU
* timings
*/
static void blk_trace_calibrate_offsets(void)
{
unsigned long flags;
smp_call_function(blk_trace_check_cpu_time, NULL, 1, 1);
local_irq_save(flags);
blk_trace_check_cpu_time(NULL);
local_irq_restore(flags);
}
static void blk_trace_set_ht_offsets(void)
{
#if defined(CONFIG_SCHED_SMT)
@ -535,7 +524,7 @@ static void blk_trace_set_ht_offsets(void)
static __init int blk_trace_init(void)
{
mutex_init(&blk_tree_mutex);
blk_trace_calibrate_offsets();
on_each_cpu(blk_trace_check_cpu_time, NULL, 1, 1);
blk_trace_set_ht_offsets();
return 0;