提交 4090959a 编写于 作者: M Martin Peschke 提交者: Jens Axboe

[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: NMartin Peschke <mp3@de.ibm.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
上级 cf342e52
......@@ -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;
......
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