From a66d5526491387f0cd373a87b25f2f3b52d03571 Mon Sep 17 00:00:00 2001
From: Huang Ying <ying.huang@intel.com>
Date: Fri, 15 Aug 2008 00:40:25 -0700
Subject: [PATCH] --- yaml --- r: 108473 b: refs/heads/master c:
 9bdeb7b5d34f197dea7859d24475943395ffea5e h: refs/heads/master i:   108471:
 95e80fe84f684b70c812ff423b5c158337e9a139 v: v3

---
 [refs]                       |  2 +-
 trunk/include/linux/ftrace.h | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 7f51649c4abc..c534e1617dc6 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 73bd9c72a29be1e8de008186eea55d333a938804
+refs/heads/master: 9bdeb7b5d34f197dea7859d24475943395ffea5e
diff --git a/trunk/include/linux/ftrace.h b/trunk/include/linux/ftrace.h
index f368d041e02d..bb384068272e 100644
--- a/trunk/include/linux/ftrace.h
+++ b/trunk/include/linux/ftrace.h
@@ -98,6 +98,27 @@ static inline void tracer_disable(void)
 #endif
 }
 
+/* Ftrace disable/restore without lock. Some synchronization mechanism
+ * must be used to prevent ftrace_enabled to be changed between
+ * disable/restore. */
+static inline int __ftrace_enabled_save(void)
+{
+#ifdef CONFIG_FTRACE
+	int saved_ftrace_enabled = ftrace_enabled;
+	ftrace_enabled = 0;
+	return saved_ftrace_enabled;
+#else
+	return 0;
+#endif
+}
+
+static inline void __ftrace_enabled_restore(int enabled)
+{
+#ifdef CONFIG_FTRACE
+	ftrace_enabled = enabled;
+#endif
+}
+
 #ifdef CONFIG_FRAME_POINTER
 /* TODO: need to fix this for ARM */
 # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))