From 8bcd06632b73291e8734f46084ed04f4106b840a Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Google)" Date: Thu, 3 Mar 2022 17:05:31 -0500 Subject: [PATCH] tracing: Allow custom events to be added to the tracefs directory 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 Cc: Andrew Morton Cc: Joel Fernandes Cc: Peter Zijlstra Cc: Masami Hiramatsu Cc: Tom Zanussi Signed-off-by: Steven Rostedt (Google) --- 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 3147614..38afd66 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; \ -- 2.7.4