From de7b2973903c6cc50b31ee5682a69b2219b9919d Mon Sep 17 00:00:00 2001 From: Mathieu Desnoyers Date: Tue, 8 Apr 2014 17:26:21 -0400 Subject: tracepoint: Use struct pointer instead of name hash for reg/unreg tracepoints Register/unregister tracepoint probes with struct tracepoint pointer rather than tracepoint name. This change, which vastly simplifies tracepoint.c, has been proposed by Steven Rostedt. It also removes 8.8kB (mostly of text) to the vmlinux size. From this point on, the tracers need to pass a struct tracepoint pointer to probe register/unregister. A probe can now only be connected to a tracepoint that exists. Moreover, tracers are responsible for unregistering the probe before the module containing its associated tracepoint is unloaded. text data bss dec hex filename 10443444 4282528 10391552 25117524 17f4354 vmlinux.orig 10434930 4282848 10391552 25109330 17f2352 vmlinux Link: http://lkml.kernel.org/r/1396992381-23785-2-git-send-email-mathieu.desnoyers@efficios.com CC: Ingo Molnar CC: Frederic Weisbecker CC: Andrew Morton CC: Frank Ch. Eigler CC: Johannes Berg Signed-off-by: Mathieu Desnoyers [ SDR - fixed return val in void func in tracepoint_module_going() ] Signed-off-by: Steven Rostedt --- kernel/trace/trace_output.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/trace/trace_output.c') diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index ca0e79e2abaa..a436de18aa99 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -431,7 +431,7 @@ int ftrace_raw_output_prep(struct trace_iterator *iter, } trace_seq_init(p); - ret = trace_seq_printf(s, "%s: ", event->name); + ret = trace_seq_printf(s, "%s: ", ftrace_event_name(event)); if (!ret) return TRACE_TYPE_PARTIAL_LINE; -- cgit v1.2.3