kerneldoc, tracing: make kernel-doc understand TRACE_EVENT() macro (take #2)

Add support to kernel-doc for tracepoint comments above TRACE_EVENT()
macro definitions. Paves the way for tracepoint docbook.

[ Impact: extend DocBook infrastructure ]

Signed-off-by: Jason Baron <jbaron@redhat.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: akpm@linux-foundation.org
Cc: rostedt@goodmis.org
Cc: fweisbec@gmail.com
Cc: mathieu.desnoyers@polymtl.ca
Cc: wcohen@redhat.com
LKML-Reference: <d80706b6797e277924d2f3ec9af176c6b2951f88.1241107197.git.jbaron@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 0f11870..2b53a55 100755 (executable)
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -1827,6 +1827,25 @@ sub reset_state {
     $state = 0;
 }
 
+sub tracepoint_munge($) {
+       my $file = shift;
+       my $tracepointname = 0;
+       my $tracepointargs = 0;
+
+       if($prototype =~ m/TRACE_EVENT\((.*?),/) {
+               $tracepointname = $1;
+       }
+       if($prototype =~ m/TP_PROTO\((.*?)\)/) {
+               $tracepointargs = $1;
+       }
+       if (($tracepointname eq 0) || ($tracepointargs eq 0)) {
+               print STDERR "Warning(${file}:$.): Unrecognized tracepoint format: \n".
+                            "$prototype\n";
+       } else {
+               $prototype = "static inline void trace_$tracepointname($tracepointargs)";
+       }
+}
+
 sub syscall_munge() {
        my $void = 0;
 
@@ -1881,6 +1900,9 @@ sub process_state3_function($$) {
        if ($prototype =~ /SYSCALL_DEFINE/) {
                syscall_munge();
        }
+       if ($prototype =~ /TRACE_EVENT/) {
+               tracepoint_munge($file);
+       }
        dump_function($prototype, $file);
        reset_state();
     }