Commit 6d07bb47 authored by Steven Rostedt's avatar Steven Rostedt

powerpc: ftrace, do not latency trace idle

Impact: fix for irq off latency tracer

When idle is called, interrupts are disabled, but the idle function
will still wake up on an interrupt. The problem is that the interrupt
disabled latency tracer will take this call to idle as a latency.

This patch disables the latency tracing when going into idle.
Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
parent ee2f6cc7
...@@ -69,10 +69,15 @@ void cpu_idle(void) ...@@ -69,10 +69,15 @@ void cpu_idle(void)
smp_mb(); smp_mb();
local_irq_disable(); local_irq_disable();
/* Don't trace irqs off for idle */
stop_critical_timings();
/* check again after disabling irqs */ /* check again after disabling irqs */
if (!need_resched() && !cpu_should_die()) if (!need_resched() && !cpu_should_die())
ppc_md.power_save(); ppc_md.power_save();
start_critical_timings();
local_irq_enable(); local_irq_enable();
set_thread_flag(TIF_POLLING_NRFLAG); set_thread_flag(TIF_POLLING_NRFLAG);
......
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