tracing/events: add support for modules to TRACE_EVENT
Impact: allow modules to add TRACE_EVENTS on load
This patch adds the final hooks to allow modules to use the TRACE_EVENT
macro. A notifier and a data structure are used to link the TRACE_EVENTs
defined in the module to connect them with the ftrace event tracing system.
It also adds the necessary automated clean ups to the trace events when a
module is removed.
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/include/linux/module.h b/include/linux/module.h
index 627ac08..6155fa4 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -337,6 +337,10 @@
const char **trace_bprintk_fmt_start;
unsigned int num_trace_bprintk_fmt;
#endif
+#ifdef CONFIG_EVENT_TRACING
+ struct ftrace_event_call *trace_events;
+ unsigned int num_trace_events;
+#endif
#ifdef CONFIG_MODULE_UNLOAD
/* What modules depend on me? */