---

yaml --- r: 140752 b: refs/heads/master c: 988ae9d h: refs/heads/master v: v3
git-mirror · Feb 17, 2009 · cf0b75b · cf0b75b
1 parent 07d53ec
commit cf0b75b
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Showing 3 changed files with 12 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 59df055f1991c9fc0c71a9230663c39188f6972f
+refs/heads/master: 988ae9d6b2bc3ebdc1a488490250a6812f85e9d4
diff --git a/trunk/include/linux/ring_buffer.h b/trunk/include/linux/ring_buffer.h
@@ -128,10 +128,12 @@ void ring_buffer_normalize_time_stamp(int cpu, u64 *ts);
 void tracing_on(void);
 void tracing_off(void);
 void tracing_off_permanent(void);
+int tracing_is_on(void);
 #else
 static inline void tracing_on(void) { }
 static inline void tracing_off(void) { }
 static inline void tracing_off_permanent(void) { }
+static inline int tracing_is_on(void) { return 0; }
 #endif
 
 void *ring_buffer_alloc_read_page(struct ring_buffer *buffer);

diff --git a/trunk/kernel/trace/ring_buffer.c b/trunk/kernel/trace/ring_buffer.c
@@ -98,6 +98,15 @@ void tracing_off_permanent(void)
 	set_bit(RB_BUFFERS_DISABLED_BIT, &ring_buffer_flags);
 }
 
+/**
+ * tracing_is_on - show state of ring buffers enabled
+ */
+int tracing_is_on(void)
+{
+	return ring_buffer_flags == RB_BUFFERS_ON;
+}
+EXPORT_SYMBOL_GPL(tracing_is_on);
+
 #include "trace.h"
 
 /* Up this if you want to test the TIME_EXTENTS and normalization */