tracing: convert irq trace points to new macros

Impact: enhancement

Converted the two irq trace point macros. The entry macro copies
the name of the irq handler, thus it is better to simply use the
TRACE_FORMAT macro which uses the trace_printk.

The return of the handler does not need to record the name, thus
the faster C style handler is more approriate.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>

include/trace/irq_event_types.h

@@ -8,26 +8,36 @@
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM irq
 
-TRACE_EVENT_FORMAT(irq_handler_entry,
+/*
+ * Tracepoint for entry of interrupt handler:
+ */
+TRACE_FORMAT(irq_handler_entry,
 	TP_PROTO(int irq, struct irqaction *action),
 	TP_ARGS(irq, action),
-	TP_FMT("irq=%d handler=%s", irq, action->name),
-	TRACE_STRUCT(
-		TRACE_FIELD(int, irq, irq)
-	),
-	TP_RAW_FMT("irq %d")
+	TP_FMT("irq=%d handler=%s", irq, action->name)
 	);
 
-TRACE_EVENT_FORMAT(irq_handler_exit,
+/*
+ * Tracepoint for return of an interrupt handler:
+ */
+TRACE_EVENT(irq_handler_exit,
+
 	TP_PROTO(int irq, struct irqaction *action, int ret),
+
 	TP_ARGS(irq, action, ret),
-	TP_FMT("irq=%d handler=%s return=%s",
-		irq, action->name, ret ? "handled" : "unhandled"),
-	TRACE_STRUCT(
-		TRACE_FIELD(int, irq, irq)
-		TRACE_FIELD(int, ret, ret)
+
+	TP_STRUCT__entry(
+		__field(	int,	irq	)
+		__field(	int,	ret	)
 	),
-	TP_RAW_FMT("irq %d ret %d")
-	);
+
+	TP_printk("irq=%d return=%s",
+		  __entry->irq, __entry->ret ? "handled" : "unhandled"),
+
+	TP_fast_assign(
+		__entry->irq	= irq;
+		__entry->ret	= ret;
+	)
+);
 
 #undef TRACE_SYSTEM