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Subject[tip:tracing/core] tracepoint: trace_sched_migrate_task(): remove parameter
Commit-ID:  de1d7286060430e79a1d50ad6e5fee8fe863c5f6
Gitweb: http://git.kernel.org/tip/de1d7286060430e79a1d50ad6e5fee8fe863c5f6
Author: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
AuthorDate: Tue, 5 May 2009 16:49:59 +0800
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Wed, 6 May 2009 12:15:51 +0200

tracepoint: trace_sched_migrate_task(): remove parameter

The orig_cpu parameter in trace_sched_migrate_task() is not necessary,
it can be got by using task_cpu(p) in the probe.

[ Impact: micro-optimization ]

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
[ modified from Mathieu's patch. The original patch is at:
http://marc.info/?l=linux-kernel&m=123791201716239&w=2 ]
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: zhaolei@cn.fujitsu.com
Cc: laijs@cn.fujitsu.com
LKML-Reference: <49FFFDB7.1050402@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>


---
include/trace/events/sched.h | 6 +++---
kernel/sched.c | 2 +-
2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index ffa1cab..dd4033c 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -180,9 +180,9 @@ TRACE_EVENT(sched_switch,
*/
TRACE_EVENT(sched_migrate_task,

- TP_PROTO(struct task_struct *p, int orig_cpu, int dest_cpu),
+ TP_PROTO(struct task_struct *p, int dest_cpu),

- TP_ARGS(p, orig_cpu, dest_cpu),
+ TP_ARGS(p, dest_cpu),

TP_STRUCT__entry(
__array( char, comm, TASK_COMM_LEN )
@@ -196,7 +196,7 @@ TRACE_EVENT(sched_migrate_task,
memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
__entry->pid = p->pid;
__entry->prio = p->prio;
- __entry->orig_cpu = orig_cpu;
+ __entry->orig_cpu = task_cpu(p);
__entry->dest_cpu = dest_cpu;
),

diff --git a/kernel/sched.c b/kernel/sched.c
index 9f7ffd0..9cdedbd 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1954,7 +1954,7 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu)

clock_offset = old_rq->clock - new_rq->clock;

- trace_sched_migrate_task(p, task_cpu(p), new_cpu);
+ trace_sched_migrate_task(p, new_cpu);

#ifdef CONFIG_SCHEDSTATS
if (p->se.wait_start)

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