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OpenCloudOS-Kernel
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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@osadl.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Carsten Emde 2009-09-13 01:41:31 +02:00 committed by Steven Rostedt
parent fe63b94a43
commit 41dfba4367
2 changed files with 1 additions and 21 deletions
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12
kernel/trace/trace_irqsoff.c
View File

@ -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++;

10
kernel/trace/trace_sched_wakeup.c
View File

@ -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: