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trace: Call tracing_reset_online_cpus before tracer->init()

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Impact: cleanup

To make it easy for ftrace plugin writers, as this was open coded in
the existing plugins

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Frédéric Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo 2009-02-05 18:02:00 -02:00 committed by Ingo Molnar
parent 51a763dd84
commit b6f11df26f
11 changed files with 25 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block/blktrace.c
View File

@ -1086,8 +1086,6 @@ static void blk_tracer_print_header(struct seq_file *m)
static void blk_tracer_start(struct trace_array *tr)
{
tracing_reset_online_cpus(tr);
mutex_lock(&blk_probe_mutex);
if (atomic_add_return(1, &blk_probes_ref) == 1)
if (blk_register_tracepoints())

8
kernel/trace/trace.c
View File

@ -2171,6 +2171,12 @@ tracing_set_trace_read(struct file *filp, char __user *ubuf,
return simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
}
int tracer_init(struct tracer *t, struct trace_array *tr)
{
tracing_reset_online_cpus(tr);
return t->init(tr);
}
static int tracing_set_tracer(const char *buf)
{
struct trace_array *tr = &global_trace;
@ -2195,7 +2201,7 @@ static int tracing_set_tracer(const char *buf)
current_trace = t;
if (t->init) {
ret = t->init(tr);
ret = tracer_init(t, tr);
if (ret)
goto out;
}

1
kernel/trace/trace.h
View File

@ -395,6 +395,7 @@ struct trace_iterator {
cpumask_var_t started;
};
int tracer_init(struct tracer *t, struct trace_array *tr);
int tracing_is_enabled(void);
void trace_wake_up(void);
void tracing_reset(struct trace_array *tr, int cpu);

1
kernel/trace/trace_branch.c
View File

@ -131,7 +131,6 @@ static void stop_branch_trace(struct trace_array *tr)
static int branch_trace_init(struct trace_array *tr)
{
tracing_reset_online_cpus(tr);
start_branch_trace(tr);
return 0;
}

17
kernel/trace/trace_functions.c
View File

@ -24,32 +24,21 @@ static struct trace_array *func_trace;
static void tracing_start_function_trace(void);
static void tracing_stop_function_trace(void);
static void start_function_trace(struct trace_array *tr)
static int function_trace_init(struct trace_array *tr)
{
func_trace = tr;
tr->cpu = get_cpu();
tracing_reset_online_cpus(tr);
put_cpu();
tracing_start_cmdline_record();
tracing_start_function_trace();
}
static void stop_function_trace(struct trace_array *tr)
{
tracing_stop_function_trace();
tracing_stop_cmdline_record();
}
static int function_trace_init(struct trace_array *tr)
{
start_function_trace(tr);
return 0;
}
static void function_trace_reset(struct trace_array *tr)
{
stop_function_trace(tr);
tracing_stop_function_trace();
tracing_stop_cmdline_record();
}
static void function_trace_start(struct trace_array *tr)

1
kernel/trace/trace_functions_graph.c
View File

@ -56,7 +56,6 @@ static int graph_trace_init(struct trace_array *tr)
&trace_graph_entry);
if (ret)
return ret;
tracing_reset_online_cpus(tr);
tracing_start_cmdline_record();
return 0;

1
kernel/trace/trace_hw_branches.c
View File

@ -132,7 +132,6 @@ static int bts_trace_init(struct trace_array *tr)
hw_branch_trace = tr;
register_hotcpu_notifier(&bts_hotcpu_notifier);
tracing_reset_online_cpus(tr);
bts_trace_start(tr);
return 0;

1
kernel/trace/trace_nop.c
View File

@ -48,7 +48,6 @@ static void stop_nop_trace(struct trace_array *tr)
static int nop_trace_init(struct trace_array *tr)
{
ctx_trace = tr;
tracing_reset_online_cpus(tr);
start_nop_trace(tr);
return 0;
}

8
kernel/trace/trace_sched_switch.c
View File

@ -185,12 +185,6 @@ void tracing_sched_switch_assign_trace(struct trace_array *tr)
ctx_trace = tr;
}
static void start_sched_trace(struct trace_array *tr)
{
tracing_reset_online_cpus(tr);
tracing_start_sched_switch_record();
}
static void stop_sched_trace(struct trace_array *tr)
{
tracing_stop_sched_switch_record();
@ -199,7 +193,7 @@ static void stop_sched_trace(struct trace_array *tr)
static int sched_switch_trace_init(struct trace_array *tr)
{
ctx_trace = tr;
start_sched_trace(tr);
tracing_start_sched_switch_record();
return 0;
}

18
kernel/trace/trace_selftest.c
View File

@ -115,7 +115,7 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
ftrace_set_filter(func_name, strlen(func_name), 1);
/* enable tracing */
ret = trace->init(tr);
ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
goto out;
@ -189,7 +189,7 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
ftrace_enabled = 1;
tracer_enabled = 1;
ret = trace->init(tr);
ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
goto out;
@ -236,7 +236,7 @@ trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
int ret;
/* start the tracing */
ret = trace->init(tr);
ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
return ret;
@ -290,7 +290,7 @@ trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
}
/* start the tracing */
ret = trace->init(tr);
ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
return ret;
@ -344,7 +344,7 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
}
/* start the tracing */
ret = trace->init(tr);
ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
goto out;
@ -476,7 +476,7 @@ trace_selftest_startup_wakeup(struct tracer *trace, struct trace_array *tr)
wait_for_completion(&isrt);
/* start the tracing */
ret = trace->init(tr);
ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
return ret;
@ -537,7 +537,7 @@ trace_selftest_startup_sched_switch(struct tracer *trace, struct trace_array *tr
int ret;
/* start the tracing */
ret = trace->init(tr);
ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
return ret;
@ -569,7 +569,7 @@ trace_selftest_startup_sysprof(struct tracer *trace, struct trace_array *tr)
int ret;
/* start the tracing */
ret = trace->init(tr);
ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
return 0;
@ -596,7 +596,7 @@ trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr)
int ret;
/* start the tracing */
ret = trace->init(tr);
ret = tracer_init(trace, tr);
if (ret) {
warn_failed_init_tracer(trace, ret);
return ret;

14
kernel/trace/trace_sysprof.c
View File

@ -226,15 +226,6 @@ static void stop_stack_timers(void)
stop_stack_timer(cpu);
}
static void start_stack_trace(struct trace_array *tr)
{
mutex_lock(&sample_timer_lock);
tracing_reset_online_cpus(tr);
start_stack_timers();
tracer_enabled = 1;
mutex_unlock(&sample_timer_lock);
}
static void stop_stack_trace(struct trace_array *tr)
{
mutex_lock(&sample_timer_lock);
@ -247,7 +238,10 @@ static int stack_trace_init(struct trace_array *tr)
{
sysprof_trace = tr;
start_stack_trace(tr);
mutex_lock(&sample_timer_lock);
start_stack_timers();
tracer_enabled = 1;
mutex_unlock(&sample_timer_lock);
return 0;
}