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tracing/events: add support for modules to TRACE_EVENT

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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>
This commit is contained in:
Steven Rostedt 2009-04-10 14:53:50 -04:00 • committed by Steven Rostedt
parent 17c873ec28
commit 6d723736e4
6 changed files with 113 additions and 32 deletions
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4
include/linux/module.h
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@ -337,6 +337,10 @@ struct module
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? */