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authorSteven Rostedt <srostedt@redhat.com>2009-02-15 03:17:02 +0300
committerSteven Rostedt <srostedt@redhat.com>2009-02-17 06:50:01 +0300
commit988ae9d6b2bc3ebdc1a488490250a6812f85e9d4 (patch)
tree2674e810891133bc7ddb935baa6c15a0412e2a8f /include/linux/ring_buffer.h
parent59df055f1991c9fc0c71a9230663c39188f6972f (diff)
downloadlinux-988ae9d6b2bc3ebdc1a488490250a6812f85e9d4.tar.xz
ring-buffer: add tracing_is_on to test if ring buffer is enabled
This patch adds the tracing_is_on() interface to tell if the ring buffer is turned on or not. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'include/linux/ring_buffer.h')
-rw-r--r--include/linux/ring_buffer.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h
index 8e6646a54acf..f5e793d69bd3 100644
--- a/include/linux/ring_buffer.h
+++ b/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);