diff options
| author | Steven Rostedt <rostedt@goodmis.org> | 2013-06-20 11:44:44 -0400 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2013-06-20 22:24:32 -0700 |
| commit | f5abaa1bfc3dbf26d19d3513f39279ca369f8d65 (patch) | |
| tree | b3b5151c021486b65b0f01f5f4d1cfb94b82d1f9 | |
| parent | 7d132055814ef17a6c7b69f342244c410a5e000f (diff) | |
| download | linux-f5abaa1bfc3dbf26d19d3513f39279ca369f8d65.tar.bz2 | |
tracing: Add DEFINE_EVENT_FN() macro
Each TRACE_EVENT() adds several helper functions. If two or more trace events
share the same structure and print format, they can also share most of these
helper functions and save a lot of space from duplicate code. This is why the
DECLARE_EVENT_CLASS() and DEFINE_EVENT() were created.
Some events require a trigger to be called at registering and unregistering of
the event and to do so they use TRACE_EVENT_FN().
If multiple events require a trigger, they currently have no choice but to use
TRACE_EVENT_FN() as there's no DEFINE_EVENT_FN() available. This unfortunately
causes a lot of wasted duplicate code created.
By adding a DEFINE_EVENT_FN(), these events can still use a
DECLARE_EVENT_CLASS() and then define their own triggers.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/51C3236C.8030508@hds.com
Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| -rw-r--r-- | include/linux/tracepoint.h | 2 | ||||
| -rw-r--r-- | include/trace/define_trace.h | 5 | ||||
| -rw-r--r-- | include/trace/ftrace.h | 4 |
3 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index f8e084d0fc77..ebeab360d851 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -378,6 +378,8 @@ static inline void tracepoint_synchronize_unregister(void) #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) #define DEFINE_EVENT(template, name, proto, args) \ DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)) +#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg)\ + DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)) #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)) #define DEFINE_EVENT_CONDITION(template, name, proto, \ diff --git a/include/trace/define_trace.h b/include/trace/define_trace.h index 1905ca8dd399..02e1003568a4 100644 --- a/include/trace/define_trace.h +++ b/include/trace/define_trace.h @@ -44,6 +44,10 @@ #define DEFINE_EVENT(template, name, proto, args) \ DEFINE_TRACE(name) +#undef DEFINE_EVENT_FN +#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \ + DEFINE_TRACE_FN(name, reg, unreg) + #undef DEFINE_EVENT_PRINT #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ DEFINE_TRACE(name) @@ -91,6 +95,7 @@ #undef TRACE_EVENT_CONDITION #undef DECLARE_EVENT_CLASS #undef DEFINE_EVENT +#undef DEFINE_EVENT_FN #undef DEFINE_EVENT_PRINT #undef DEFINE_EVENT_CONDITION #undef TRACE_HEADER_MULTI_READ diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index 19edd7facaa1..d615f78cc6b6 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -71,6 +71,10 @@ static struct ftrace_event_call __used \ __attribute__((__aligned__(4))) event_##name +#undef DEFINE_EVENT_FN +#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \ + DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) + #undef DEFINE_EVENT_PRINT #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) |