intel_idle: simplify test for leave_mm()
A run-time test to invoke leave_mm() for the deepest
supported C-state is redundant, since the appropriate
C-states already have flags with CPUIDLE_FLAG_TLB_FLUSHED set.
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index c37ef64..ad0fb01 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -186,13 +186,10 @@
local_irq_disable();
/*
- * If the state flag indicates that the TLB will be flushed or if this
- * is the deepest c-state supported, do a voluntary leave mm to avoid
- * costly and mostly unnecessary wakeups for flushing the user TLB's
- * associated with the active mm.
+ * leave_mm() to avoid costly and often unnecessary wakeups
+ * for flushing the user TLB's associated with the active mm.
*/
- if (state->flags & CPUIDLE_FLAG_TLB_FLUSHED ||
- (&dev->states[dev->state_count - 1] == state))
+ if (state->flags & CPUIDLE_FLAG_TLB_FLUSHED)
leave_mm(cpu);
if (!(lapic_timer_reliable_states & (1 << (cstate))))