linux-kernel - [PATCH v3 04/12] tracing: export ftrace

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Message-ID: <1365564393-10972-5-git-send-email-jovi.zhangwei@huawei.com>
Date:	Wed, 10 Apr 2013 11:26:25 +0800
From:	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>
To:	<rostedt@...dmis.org>, <fweisbec@...il.com>, <mingo@...hat.com>,
	<linux-kernel@...r.kernel.org>
CC:	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>
Subject: [PATCH v3 04/12] tracing: export ftrace_events

From: "zhangwei(Jovi)" <jovi.zhangwei@...wei.com>

let modules can access ftrace_events

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@...wei.com>
---
 include/linux/ftrace_event.h |    1 +
 kernel/trace/trace.h         |    1 -
 kernel/trace/trace_events.c  |    2 ++
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 4b55272..f6a6e48 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -346,6 +346,7 @@ enum {
 #define EVENT_STORAGE_SIZE 128
 extern struct mutex event_storage_mutex;
 extern char event_storage[EVENT_STORAGE_SIZE];
+extern struct list_head ftrace_events;
 
 extern int trace_event_raw_init(struct ftrace_event_call *call);
 extern int trace_define_field(struct ftrace_event_call *call, const char *type,
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 0a1f4be..8f4966b 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -917,7 +917,6 @@ extern int event_trace_add_tracer(struct dentry *parent, struct trace_array *tr)
 extern int event_trace_del_tracer(struct trace_array *tr);
 
 extern struct mutex event_mutex;
-extern struct list_head ftrace_events;
 
 extern const char *__start___trace_bprintk_fmt[];
 extern const char *__stop___trace_bprintk_fmt[];
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 09ca479..7c52a51 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -34,6 +34,8 @@ char event_storage[EVENT_STORAGE_SIZE];
 EXPORT_SYMBOL_GPL(event_storage);
 
 LIST_HEAD(ftrace_events);
+EXPORT_SYMBOL_GPL(ftrace_events);
+
 static LIST_HEAD(ftrace_common_fields);
 
 #define GFP_TRACE (GFP_KERNEL | __GFP_ZERO)
-- 
1.7.9.7


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