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tracing/ftrace: fix a bug when switch current tracer to sched tracer 

Impact: fix boot tracer + sched tracer coupling bug

Fix a bug that made the sched_switch tracer unable to run
if set as the current_tracer after the boot tracer.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker 2008-10-31 13:34:45 +01:00 committed by Ingo Molnar
parent efade6e782
commit 79a9d461fd
2 changed files with 3 additions and 3 deletions
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4
kernel/trace/trace_boot.c
View File

@ -37,9 +37,9 @@ void disable_boot_trace(void)
tracing_stop_cmdline_record(); tracing_stop_cmdline_record();
} }
void reset_boot_trace(struct trace_array *tr) static void reset_boot_trace(struct trace_array *tr)
{ {
disable_boot_trace(); sched_switch_trace.reset(tr);
} }
static void boot_trace_init(struct trace_array *tr) static void boot_trace_init(struct trace_array *tr)

2
kernel/trace/trace_sched_switch.c
View File

@ -173,7 +173,7 @@ static void sched_switch_trace_init(struct trace_array *tr)
static void sched_switch_trace_reset(struct trace_array *tr) static void sched_switch_trace_reset(struct trace_array *tr)
{ {
if (tr->ctrl) if (tr->ctrl && sched_ref)
stop_sched_trace(tr); stop_sched_trace(tr);
} }