ring-buffer: add api to allow a tracer to change clock source

[mirror_ubuntu-zesty-kernel.git] / include / linux / ring_buffer.h

diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h
index b1a0068a5557a24fc28ed906176d0222dd4fd08c..9e6052bd1a1c9f42edafe3959b5b57e8f652e159 100644 (file)
--- a/include/linux/ring_buffer.h
+++ b/include/linux/ring_buffer.h
@@ -118,8 +118,11 @@ unsigned long ring_buffer_overruns(struct ring_buffer *buffer);
 unsigned long ring_buffer_entries_cpu(struct ring_buffer *buffer, int cpu);
 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);
+u64 ring_buffer_time_stamp(struct ring_buffer *buffer, int cpu);
+void ring_buffer_normalize_time_stamp(struct ring_buffer *buffer,
+                                     int cpu, u64 *ts);
+void ring_buffer_set_clock(struct ring_buffer *buffer,
+                          u64 (*clock)(void));
 
 size_t ring_buffer_page_len(void *page);