sched/clock: Remove pointless test in cpu_clock/local_clock

In case the HAVE_UNSTABLE_SCHED_CLOCK config is set, the cpu_clock() version
checks if sched_clock_stable() is not set and calls sched_clock_cpu(),
otherwise it calls sched_clock().

sched_clock_cpu() checks also if sched_clock_stable() is set and, if true,
calls sched_clock().

sched_clock() will be called in sched_clock_cpu() if sched_clock_stable() is
true.

Remove the duplicate test by directly calling sched_clock_cpu() and let the
static key act in this function instead.

Signed-off-by: Daniel Lezcano <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

1 files changed, 2 insertions, 8 deletions

diff --git a/kernel/sched/clock.c b/kernel/sched/clock.c
index fedb967a9841..30c4b202f0ba 100644
--- a/kernel/sched/clock.c
+++ b/kernel/sched/clock.c
@@ -375,10 +375,7 @@ EXPORT_SYMBOL_GPL(sched_clock_idle_wakeup_event);
  */
 u64 cpu_clock(int cpu)
 {
-	if (!sched_clock_stable())
-		return sched_clock_cpu(cpu);
-
-	return sched_clock();
+	return sched_clock_cpu(cpu);
 }
 
 /*
@@ -390,10 +387,7 @@ u64 cpu_clock(int cpu)
  */
 u64 local_clock(void)
 {
-	if (!sched_clock_stable())
-		return sched_clock_cpu(raw_smp_processor_id());
-
-	return sched_clock();
+	return sched_clock_cpu(raw_smp_processor_id());
 }
 
 #else /* CONFIG_HAVE_UNSTABLE_SCHED_CLOCK */