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authorMartin Peschke <mp3@de.ibm.com>2006-08-29 13:52:55 -0400
committerJens Axboe <axboe@nelson.home.kernel.dk>2006-09-30 14:31:19 -0400
commit4090959aee403817ff386415f9bc602c1a0882ef (patch)
treee2bd8b6ea922b14def3309eb18fc7d469e635b90 /block
parentcf342e52e3117391868fb4bd900ce772a27a5a1a (diff)
[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>
Diffstat (limited to 'block')
-rw-r--r--block/blktrace.c19
1 files changed, 4 insertions, 15 deletions
diff --git a/block/blktrace.c b/block/blktrace.c
index 2592f215a905..a45e61885037 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -476,6 +476,9 @@ static void blk_check_time(unsigned long long *t)
476 *t -= (a + b) / 2; 476 *t -= (a + b) / 2;
477} 477}
478 478
479/*
480 * calibrate our inter-CPU timings
481 */
479static void blk_trace_check_cpu_time(void *data) 482static void blk_trace_check_cpu_time(void *data)
480{ 483{
481 unsigned long long *t; 484 unsigned long long *t;
@@ -493,20 +496,6 @@ static void blk_trace_check_cpu_time(void *data)
493 put_cpu(); 496 put_cpu();
494} 497}
495 498
496/*
497 * Call blk_trace_check_cpu_time() on each CPU to calibrate our inter-CPU
498 * timings
499 */
500static void blk_trace_calibrate_offsets(void)
501{
502 unsigned long flags;
503
504 smp_call_function(blk_trace_check_cpu_time, NULL, 1, 1);
505 local_irq_save(flags);
506 blk_trace_check_cpu_time(NULL);
507 local_irq_restore(flags);
508}
509
510static void blk_trace_set_ht_offsets(void) 499static void blk_trace_set_ht_offsets(void)
511{ 500{
512#if defined(CONFIG_SCHED_SMT) 501#if defined(CONFIG_SCHED_SMT)
@@ -535,7 +524,7 @@ static void blk_trace_set_ht_offsets(void)
535static __init int blk_trace_init(void) 524static __init int blk_trace_init(void)
536{ 525{
537 mutex_init(&blk_tree_mutex); 526 mutex_init(&blk_tree_mutex);
538 blk_trace_calibrate_offsets(); 527 on_each_cpu(blk_trace_check_cpu_time, NULL, 1, 1);
539 blk_trace_set_ht_offsets(); 528 blk_trace_set_ht_offsets();
540 529
541 return 0; 530 return 0;