lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

tracing: remove unused local variables in tracer probe functions

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

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++;