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authorSteven Rostedt <srostedt@redhat.com>2009-03-18 00:22:06 +0300
committerSteven Rostedt <srostedt@redhat.com>2009-03-18 06:06:31 +0300
commit37886f6a9f62d22530ffee8d3f9215c8345b6969 (patch)
tree046c9086682145fd2808af7197af669f08be6d0a /include
parent6adaad14d7d4d3ef31b4e2dc992b18b5da7c4eb3 (diff)
downloadlinux-37886f6a9f62d22530ffee8d3f9215c8345b6969.tar.xz
ring-buffer: add api to allow a tracer to change clock source
This patch adds a new function called ring_buffer_set_clock that allows a tracer to assign its own clock source to the buffer. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/ring_buffer.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h
index b1a0068a5557..9e6052bd1a1c 100644
--- 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);