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| author | Tom Zanussi <tom.zanussi@linux.intel.com> | 2018-01-16 05:51:39 +0300 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-03-11 00:05:50 +0300 |
| commit | 00b4145298aeb05a2d110117ed18148cb21ebd14 (patch) | |
| tree | 610810c0d71a584fe63b555d07dafba619ab8054 /kernel/trace/trace.h | |
| parent | c193707dde77ace92a649cd59a17e105e2fbeaef (diff) | |
| download | linux-00b4145298aeb05a2d110117ed18148cb21ebd14.tar.xz | |
ring-buffer: Add interface for setting absolute time stamps
Define a new function, tracing_set_time_stamp_abs(), which can be used
to enable or disable the use of absolute timestamps rather than time
deltas for a trace array.
Only the interface is added here; a subsequent patch will add the
underlying implementation.
Link: http://lkml.kernel.org/r/ce96119de44c7fe0ee44786d15254e9b493040d3.1516069914.git.tom.zanussi@linux.intel.com
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Baohong Liu <baohong.liu@intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 2a6d0325a761..477341710ebf 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -273,6 +273,7 @@ struct trace_array { /* function tracing enabled */ int function_enabled; #endif + int time_stamp_abs_ref; }; enum { @@ -286,6 +287,8 @@ extern struct mutex trace_types_lock; extern int trace_array_get(struct trace_array *tr); extern void trace_array_put(struct trace_array *tr); +extern int tracing_set_time_stamp_abs(struct trace_array *tr, bool abs); + /* * The global tracer (top) should be the first trace array added, * but we check the flag anyway. |