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Subject[PATCH 1/2] ftrace: Kill tracing_{start,stop}_sched_switch_record() and tracing_sched_switch_assign_trace()
tracing_{start,stop}_sched_switch_record() have no callers since
87d80de2800d "tracing: Remove obsolete sched_switch tracer".

The last caller of tracing_sched_switch_assign_trace() was removed
by 30dbb20e68e6 "tracing: Remove boot tracer".

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
kernel/trace/trace.h | 3 --
kernel/trace/trace_sched_switch.c | 48 -------------------------------------
2 files changed, 0 insertions(+), 51 deletions(-)

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 9258f5a..df2b33b 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -595,9 +595,6 @@ void set_graph_array(struct trace_array *tr);

void tracing_start_cmdline_record(void);
void tracing_stop_cmdline_record(void);
-void tracing_sched_switch_assign_trace(struct trace_array *tr);
-void tracing_stop_sched_switch_record(void);
-void tracing_start_sched_switch_record(void);
int register_tracer(struct tracer *type);
int is_tracing_stopped(void);

diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index 3f34dc9..3b60301 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -197,51 +197,3 @@ void tracing_stop_cmdline_record(void)
{
tracing_stop_sched_switch();
}
-
-/**
- * tracing_start_sched_switch_record - start tracing context switches
- *
- * Turns on context switch tracing for a tracer.
- */
-void tracing_start_sched_switch_record(void)
-{
- if (unlikely(!ctx_trace)) {
- WARN_ON(1);
- return;
- }
-
- tracing_start_sched_switch();
-
- mutex_lock(&sched_register_mutex);
- tracer_enabled++;
- mutex_unlock(&sched_register_mutex);
-}
-
-/**
- * tracing_stop_sched_switch_record - start tracing context switches
- *
- * Turns off context switch tracing for a tracer.
- */
-void tracing_stop_sched_switch_record(void)
-{
- mutex_lock(&sched_register_mutex);
- tracer_enabled--;
- WARN_ON(tracer_enabled < 0);
- mutex_unlock(&sched_register_mutex);
-
- tracing_stop_sched_switch();
-}
-
-/**
- * tracing_sched_switch_assign_trace - assign a trace array for ctx switch
- * @tr: trace array pointer to assign
- *
- * Some tracers might want to record the context switches in their
- * trace. This function lets those tracers assign the trace array
- * to use.
- */
-void tracing_sched_switch_assign_trace(struct trace_array *tr)
-{
- ctx_trace = tr;
-}
-
--
1.5.5.1


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