microblaze: Do not trace cpu_relax function

IRQsoff tracer requires to protect cpu_idle function
to get correct timing report.

Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 5 insertions, 2 deletions

diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 09bed44dfcd3..ba7c4b16ed35 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -76,8 +76,11 @@ __setup("hlt", hlt_setup);
 void default_idle(void)
 {
         if (likely(hlt_counter)) {
-                while (!need_resched())
-                        cpu_relax();
+                local_irq_disable();
+                stop_critical_timings();
+                cpu_relax();
+                start_critical_timings();
+                local_irq_enable();
         } else {
                 clear_thread_flag(TIF_POLLING_NRFLAG);
                 smp_mb__after_clear_bit();