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| author |   Carsten Emde <Carsten.Emde@osadl.org> | 2009-09-13 01:41:31 +0200 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2009-09-12 21:44:13 -0400 |
| commit | 41dfba4367109b92d92ec6e059be6950497d932f (patch) | |
| tree | ce9fe350c5b0e1c46586a45a088a4cf6913deb86 /kernel/trace | |
| parent | tracing: prevent NULL pointer dereference in ftrace_raw_event_block_bio_bounce (diff) | |
| download | linux-dev-41dfba4367109b92d92ec6e059be6950497d932f.tar.xz linux-dev-41dfba4367109b92d92ec6e059be6950497d932f.zip | |
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>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_irqsoff.c | 12 | ||||
| -rw-r--r-- | 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 5555b75a0d12..06f8ea9e4b9d 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 cf43bdb1763a..6e1529bc6172 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: |