linux-kernel - [PATCH] tracing: add DEFINE_EVENT(), DEFINE_SINGLE

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Date:	Mon, 30 Nov 2009 16:23:43 -0500
From:	Jason Baron <jbaron@...hat.com>
To:	mingo@...e.hu
Cc:	linux-kernel@...r.kernel.org, randy.dunlap@...cle.com,
	mhiramat@...hat.com, wcohen@...hat.com, rostedt@...dmis.org,
	fweisbec@...il.com, mathieu.desnoyers@...ymtl.ca
Subject: [PATCH] tracing: add DEFINE_EVENT(), DEFINE_SINGLE_EVENT() support to docbook

The introduction of the new 'DECLARE_EVENT_CLASS()' obviates the need for the
'TRACE_EVENT()' macro in some cases. Thus, docbook style comments that used
to live with 'TRACE_EVENT()' are now moved to 'DEFINE_EVENT()'. Thus, we need
to make the docbook system understand the new 'DEFINE_EVENT()' macro. In
addition I've tried to futureproof the patch, by also adding support for
'DEFINE_SINGLE_EVENT()', since there has been discussion about renaming:
TRACE_EVENT() -> DEFINE_SINGLE_EVENT().

Without this patch the tracepoint docbook fails to build.

I've verified that this patch correctly builds the tracepoint docbook which
currently covers signals, and irqs.

Signed-off-by: Jason Baron <jbaron@...hat.com>
---

 scripts/kernel-doc |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index ea9f8a5..d1746be 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -1855,6 +1855,13 @@ sub tracepoint_munge($) {
 	if($prototype =~ m/TRACE_EVENT\((.*?),/) {
 		$tracepointname = $1;
 	}
+	if($prototype =~ m/DEFINE_SINGLE_EVENT\((.*?),/) {
+		$tracepointname = $1;
+	}
+	if($prototype =~ m/DEFINE_EVENT\((.*?),(.*?),/) {
+		$tracepointname = $2;
+	}
+	$tracepointname =~ s/^\s+//; #strip leading whitespace
 	if($prototype =~ m/TP_PROTO\((.*?)\)/) {
 		$tracepointargs = $1;
 	}
@@ -1920,7 +1927,9 @@ sub process_state3_function($$) {
 	if ($prototype =~ /SYSCALL_DEFINE/) {
 		syscall_munge();
 	}
-	if ($prototype =~ /TRACE_EVENT/) {
+	if ($prototype =~ /TRACE_EVENT/ || $prototype =~ /DEFINE_EVENT/ ||
+	    $prototype =~ /DEFINE_SINGLE_EVENT/)
+	{
 		tracepoint_munge($file);
 	}
 	dump_function($prototype, $file);
-- 
1.6.5.1

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