microblaze: Improve ftrace time measuring
I had to comment sched_clock generic function because of broken toolchain.
It is fine grain timing.
Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index ed61b2f..22e296e 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -235,6 +235,12 @@
return 0;
}
+/*
+ * We have to protect accesses before timer initialization
+ * and return 0 for sched_clock function below.
+ */
+static int timer_initialized;
+
void __init time_init(void)
{
u32 irq, i = 0;
@@ -289,4 +295,15 @@
#endif
microblaze_clocksource_init();
microblaze_clockevent_init();
+ timer_initialized = 1;
+}
+
+unsigned long long notrace sched_clock(void)
+{
+ if (timer_initialized) {
+ struct clocksource *cs = &clocksource_microblaze;
+ cycle_t cyc = cs->read(NULL);
+ return clocksource_cyc2ns(cyc, cs->mult, cs->shift);
+ }
+ return 0;
}