Commit-ID: 41dfba4367109b92d92ec6e059be6950497d932f
Gitweb: http://git.kernel.org/tip/41dfba4367109b92d92ec6e059be6950497d932f
Author: Carsten Emde <Carsten.Emde@xxxxxxxxx>
AuthorDate: Sun, 13 Sep 2009 01:41:31 +0200
Committer: Steven Rostedt <rostedt@xxxxxxxxxxx>
CommitDate: Sat, 12 Sep 2009 21:44:13 -0400
tracing: remove unused local variables in tracer probe functions
When the nsecs_to_usecs() conversion in probe_wakeup_sched_switch() and
check_critical_timing() was moved to a later stage in order to avoid
unnecessary computing, it was overlooked to remove the original
variables, assignments and comments..
Signed-off-by: Carsten Emde <C.Emde@xxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
kernel/trace/trace_irqsoff.c | 12 +-----------
kernel/trace/trace_sched_wakeup.c | 10 ----------
2 files changed, 1 insertions(+), 21 deletions(-)
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 5555b75..06f8ea9 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -129,15 +129,10 @@ check_critical_timing(struct trace_array *tr,
unsigned long parent_ip,
int cpu)
{
- unsigned long latency, t0, t1;
cycle_t T0, T1, delta;
unsigned long flags;
int pc;
- /*
- * usecs conversion is slow so we try to delay the conversion
- * as long as possible:
- */
T0 = data->preempt_timestamp;
T1 = ftrace_now(cpu);
delta = T1-T0;
@@ -157,17 +152,12 @@ check_critical_timing(struct trace_array *tr,
trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc);
- latency = nsecs_to_usecs(delta);
-
if (data->critical_sequence != max_sequence)
goto out_unlock;
- tracing_max_latency = delta;
- t0 = nsecs_to_usecs(T0);
- t1 = nsecs_to_usecs(T1);
-
data->critical_end = parent_ip;
+ tracing_max_latency = delta;
update_max_tr_single(tr, current, cpu);
max_sequence++;
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index cf43bdb..6e1529b 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -110,7 +110,6 @@ static void notrace
probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev,
struct task_struct *next)
{
- unsigned long latency = 0, t0 = 0, t1 = 0;
struct trace_array_cpu *data;
cycle_t T0, T1, delta;
unsigned long flags;
@@ -156,10 +155,6 @@ probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev,
trace_function(wakeup_trace, CALLER_ADDR0, CALLER_ADDR1, flags, pc);
tracing_sched_switch_trace(wakeup_trace, prev, next, flags, pc);
- /*
- * usecs conversion is slow so we try to delay the conversion
- * as long as possible:
- */
T0 = data->preempt_timestamp;
T1 = ftrace_now(cpu);
delta = T1-T0;
@@ -167,12 +162,7 @@ probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev,
if (!report_latency(delta))
goto out_unlock;
- latency = nsecs_to_usecs(delta);
-
tracing_max_latency = delta;
- t0 = nsecs_to_usecs(T0);
- t1 = nsecs_to_usecs(T1);
-
update_max_tr(wakeup_trace, wakeup_task, wakeup_cpu);
out_unlock:
--
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