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authorIngo Molnar <mingo@elte.hu>2009-02-09 10:35:12 +0100
committerIngo Molnar <mingo@elte.hu>2009-02-09 10:35:12 +0100
commit44b0635481437140b0e29d6023f05e805d5e7620 (patch)
treeff31986115075410d0479df307a6b9841976026c /include/linux/ring_buffer.h
parent4ad476e11f94fd3724c6e272d8220e99cd222b27 (diff)
parent57794a9d48b63e34acbe63282628c9f029603308 (diff)
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Merge branch 'tip/tracing/core/devel' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace
Conflicts: kernel/trace/trace_hw_branches.c
Diffstat (limited to 'include/linux/ring_buffer.h')
-rw-r--r--include/linux/ring_buffer.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h
index 3110d92e7d81..3c103d636da3 100644
--- a/include/linux/ring_buffer.h
+++ b/include/linux/ring_buffer.h
@@ -121,9 +121,18 @@ unsigned long ring_buffer_overrun_cpu(struct ring_buffer *buffer, int cpu);
u64 ring_buffer_time_stamp(int cpu);
void ring_buffer_normalize_time_stamp(int cpu, u64 *ts);
+/*
+ * The below functions are fine to use outside the tracing facility.
+ */
+#ifdef CONFIG_RING_BUFFER
void tracing_on(void);
void tracing_off(void);
void tracing_off_permanent(void);
+#else
+static inline void tracing_on(void) { }
+static inline void tracing_off(void) { }
+static inline void tracing_off_permanent(void) { }
+#endif
void *ring_buffer_alloc_read_page(struct ring_buffer *buffer);
void ring_buffer_free_read_page(struct ring_buffer *buffer, void *data);