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Commit c7b84eca authored by Steven Rostedt's avatar Steven Rostedt Committed by Steven Rostedt
Browse files

tracing: Remove unused function unregister_tracer() 



The function register_tracer() is only used by kernel core code,
that never needs to remove the tracer. As trace_events have become
the main way to add new tracing to the kernel, the need to
unregister a tracer has diminished. Remove the unused function
unregister_tracer(). If a need arises where we need it, then we
can always add it back.

Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 15075cac

kernel/trace/trace.c

+0 −26
Original line number Diff line number Diff line
@@ -882,32 +882,6 @@ int register_tracer(struct tracer *type) 
	return ret;

}



void unregister_tracer(struct tracer *type)

{

	struct tracer **t;



	mutex_lock(&trace_types_lock);

	for (t = &trace_types; *t; t = &(*t)->next) {

		if (*t == type)

			goto found;

	}

	pr_info("Tracer %s not registered\n", type->name);

	goto out;



 found:

	*t = (*t)->next;



	if (type == current_trace && tracer_enabled) {

		tracer_enabled = 0;

		tracing_stop();

		if (current_trace->stop)

			current_trace->stop(&global_trace);

		current_trace = &nop_trace;

	}

out:

	mutex_unlock(&trace_types_lock);

}



void tracing_reset(struct trace_array *tr, int cpu)

{

	struct ring_buffer *buffer = tr->buffer;

kernel/trace/trace.h

+0 −1
Original line number Diff line number Diff line
@@ -410,7 +410,6 @@ 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);

void unregister_tracer(struct tracer *type);

int is_tracing_stopped(void);

enum trace_file_type {

	TRACE_FILE_LAT_FMT	= 1,