aboutsummaryrefslogtreecommitdiff
path: root/kernel/trace/trace_events.c
diff options
context:
space:
mode:
authorSteven Rostedt (Google)2022-03-03 17:05:31 -0500
committerSteven Rostedt (Google)2022-03-10 17:41:18 -0500
commit8bcd06632b73291e8734f46084ed04f4106b840a (patch)
treec1ba8b9b8f6144aee173df8a0539a3bacbbff640 /kernel/trace/trace_events.c
parent5677a3d713ad795e3ce32d631941e982777b43db (diff)
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 <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>
Diffstat (limited to 'kernel/trace/trace_events.c')
-rw-r--r--kernel/trace/trace_events.c2
1 files changed, 2 insertions, 0 deletions
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; \