[PATCH 2/2] tracing: Use sched_clock_cpu for trace_clock_global

[Namhyung Kim <namhyung@kernel.org>]

From: Namhyung Kim <namhyung.kim@lge.com>

For systems have unstable sched_clock, all cpu_clock() does is enable/
disable local irq during call to sched_clock().  And for stable systems
they are same.

As in trace_clock_global(), we already does it for local irq, calling
sched_clock_cpu() directly would be appropriate.

Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Fredereic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 kernel/trace/trace_clock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_clock.c b/kernel/trace/trace_clock.c
index 394783531cbb..795f077978a8 100644
--- a/kernel/trace/trace_clock.c
+++ b/kernel/trace/trace_clock.c
@@ -86,7 +86,7 @@ u64 notrace trace_clock_global(void)
 	local_irq_save(flags);
 
 	this_cpu = raw_smp_processor_id();
-	now = cpu_clock(this_cpu);
+	now = sched_clock_cpu(this_cpu);
 	/*
 	 * If in an NMI context then dont risk lockups and return the
 	 * cpu_clock() time:
-- 
1.7.11.7