Messages in this thread Patch in this message |  | | Date | Sat, 12 Mar 2022 18:25:29 -0500 | From | Steven Rostedt <> | Subject | [for-next][PATCH 04/12] tracing: Allow custom events to be added to the tracefs directory |
| |
From: "Steven Rostedt (Google)" <rostedt@goodmis.org>
Allow custom events to be added to the events directory in the tracefs file system. For example, a module could be installed that attaches to an event and wants to be enabled and disabled via the tracefs file system. It would use trace_add_event_call() to add the event to the tracefs directory, and trace_remove_event_call() to remove it.
Make both those functions EXPORT_SYMBOL_GPL().
Link: https://lkml.kernel.org/r/20220303220625.186988045@goodmis.org
Cc: Ingo Molnar <mingo@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Tom Zanussi <zanussi@kernel.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> --- kernel/trace/trace_events.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 3147614c1812..38afd66d80e3 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -2758,6 +2758,7 @@ int trace_add_event_call(struct trace_event_call *call) mutex_unlock(&trace_types_lock); return ret; } +EXPORT_SYMBOL_GPL(trace_add_event_call); /* * Must be called under locking of trace_types_lock, event_mutex and @@ -2819,6 +2820,7 @@ int trace_remove_event_call(struct trace_event_call *call) return ret; } +EXPORT_SYMBOL_GPL(trace_remove_event_call); #define for_each_event(event, start, end) \ for (event = start; \ -- 2.35.1
|  |