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Date:   Wed,  6 Dec 2017 16:38:14 -0600
From:   Tom Zanussi <>
        Tom Zanussi <>
Subject: [PATCH v7 33/37] tracing: Make tracing_set_clock() non-static

Allow tracing code outside of trace.c to access tracing_set_clock().

Some applications may require a particular clock in order to function
properly, such as latency calculations.

Also, add an accessor returning the current clock string.

Signed-off-by: Tom Zanussi <>
 kernel/trace/trace.c | 2 +-
 kernel/trace/trace.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 3a14b70..660763e 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -6230,7 +6230,7 @@ static int tracing_clock_show(struct seq_file *m, void *v)
 	return 0;
-static int tracing_set_clock(struct trace_array *tr, const char *clockstr)
+int tracing_set_clock(struct trace_array *tr, const char *clockstr)
 	int i;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 52667dd..68153a8 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -288,6 +288,7 @@ enum {
 extern void trace_array_put(struct trace_array *tr);
 extern int tracing_set_time_stamp_abs(struct trace_array *tr, bool abs);
+extern int tracing_set_clock(struct trace_array *tr, const char *clockstr);
 extern bool trace_clock_in_ns(struct trace_array *tr);

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