linux-kernel - [PATCH -tip 3/3] Tracing/ftrace: Adapt boot tracer to the new type of print

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Date:	Fri, 26 Sep 2008 17:49:39 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	mingo@...e.hu
CC:	rostedt@...dmis.org, linux-kernel@...r.kernel.org
Subject: [PATCH -tip 3/3] Tracing/ftrace: Adapt boot tracer to the new type
 of print_line

Adapt the boot tracer to the new type of the print_line callback.
If it doesn't handle a type, it relays to next output functions.
It will let this tracer to accept sched, stack or print entries.

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index d5c9e2e..d1260b6 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -45,21 +45,25 @@ static void boot_trace_ctrl_update(struct trace_array *tr)
 		stop_boot_trace(tr);
 }
 
-static int initcall_print_line(struct trace_iterator *iter)
+static enum print_line_t initcall_print_line(struct trace_iterator *iter)
 {
-	int ret = 0;
+	int ret;
 	struct trace_entry *entry = iter->ent;
 	struct boot_trace *it = &entry->field.initcall;
 	struct trace_seq *s = &iter->seq;
 
-	if (iter->ent->type == TRACE_BOOT)
+	if (iter->ent->type == TRACE_BOOT) {
 		ret = trace_seq_printf(s, "%pF called from %i "
 				       "returned %d after %lld msecs\n",
 				       it->func, it->caller, it->result,
 				       it->duration);
-	if (ret)
-		return 1;
-	return 0;
+		if (ret)
+			return TRACE_TYPE_HANDLED;
+		else
+			return TRACE_TYPE_PARTIAL_LINE;
+	}
+
+	return TRACE_TYPE_UNHANDLED;
 }
 
 struct tracer boot_tracer __read_mostly =
--
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