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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: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt 2012-05-11 20:54:53 -04:00 committed by Steven Rostedt
parent 15075cac42
commit c7b84ecada
2 changed files with 0 additions and 27 deletions
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26
kernel/trace/trace.c
View File

@ -882,32 +882,6 @@ int register_tracer(struct tracer *type)
return ret; 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) void tracing_reset(struct trace_array *tr, int cpu)
{ {
struct ring_buffer *buffer = tr->buffer; struct ring_buffer *buffer = tr->buffer;

1
kernel/trace/trace.h
View File

@ -410,7 +410,6 @@ void tracing_sched_switch_assign_trace(struct trace_array *tr);
void tracing_stop_sched_switch_record(void); void tracing_stop_sched_switch_record(void);
void tracing_start_sched_switch_record(void); void tracing_start_sched_switch_record(void);
int register_tracer(struct tracer *type); int register_tracer(struct tracer *type);
void unregister_tracer(struct tracer *type);
int is_tracing_stopped(void); int is_tracing_stopped(void);
enum trace_file_type { enum trace_file_type {
TRACE_FILE_LAT_FMT = 1, TRACE_FILE_LAT_FMT = 1,